Standard Operating Procedure Teledyne Model 640 Real-Time Continuous PM Monitor


May 10"', 2019

Standard Operating Procedure
Teledyne Model 640
Real-Time Continuous PM Monitor

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ACKNOWLEDGMENTS

An SOP for the Teledyne API (T-API) T640x was originally drafted through work order 3-13 on
contract EP-G15D-00340 to Sonoma Technology, Inc. (STI). The T640x SOP included
substantial input taken from the T-API Model T640x PM Mass Monitor User Manual. User
experiences were included by testing a T640x instrument temporarily located at STFs facility in
Petaluma, CA, and EPA's testing of two T640x instruments in Research Triangle Park, NC. T-
API staff provided multiple reviews of the early drafts of the SOP. With a draft T640x SOP in
hand, EPA staff solicited input from T640 and T640x users across the country. Input and review
of the T640x SOP was received from over a dozen monitoring agencies on a conference call in
October of 2017. Additionally, written input was received from Kathy Jones of the Chattanooga
Hamilton County Air Pollution Control Bureau and from Mickey Turner of the Clark County
Department of Air Quality. EPA colleagues from Regional offices and ORD also provided
written input. Comments and edits were received from Adam Zachary of EPA Region 4, Dorothy
Crawford of EPA Region 6, and Robert Vanderpool of EPA-ORD. The input from staff at STI, T-
API, early adopters of the T640 and T640x in monitoring agencies across the country, and EPA
Regional offices staff are all greatly appreciated.

The T640x SOP was modified under work order 4-15 to produce this document - the SOP for the
T640 instrument. While this SOP may be subject to further revisions as we learn more about how
to optimize the operation of this method, it should be far enough along to be of substantial value
to agencies that need an SOP to collect data with their T640 monitors. Additional edits,
comments, or recommendations on this SOP may be sent to Tim Hanley of the U.S. EPA's Office
of Air Quality Planning and Standards in RTP, NC (email: hanley.tim@epa.gov).

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Table of Contents

1.0 SUMMARY OF METHOD	5

1.1	PRINCIPLES 01 OPERATION	5

1.2	METHOD REQUIREMENTS	5

2.0 DEFINITIONS	6

3.0 HEALTH AND SAFETY WARNINGS	7

4.0 INTERFERENCES	8

5.0 EQUIPMENT AND SUPPLIES	8

5.1	INSTALLATION EQUIPMENT AND SUPPLIES	8

5.2	ROUTINE EQUIPMENT AND SUPPLIES	8

6.0 PROCEDURES	9

6.1	OPERATION	9

6.2	MAINTENANCE AND SERVICE	9

6.2.1 Maintenance Schedule	9

6.3	MAINTENANCE PROCEDURES	11

6.3.1	Cleaning the T640 Inlet	11

6.3.2	Changing the Disposable Filter Units (DFUs)	12

6.3.3	Checking Pump Performance	 14

6.3.4	Checking the Flow	 14

6.3.5	Cleaning the Optical Chamber and the RH/T Sensor	14

6.3.6	Inspecting the Sample Tubes	18

6.4	INSTRUMENT VERIFICATIONS	18

6.4.1	Zero Test	19

6.4.2	Alternative Procedure for Walk-in Shelters	21

6.4.3	Pressure Verification	22

6.4.4	Ambient Temperature Verification	23

6.4.5	Sample Flow (5.0 1pm) Verification	24

6.4.6	PMT Verification - (Performed Quarterly)	25

6.5	INSTRUMENT CALIBRATIONS	26

6.5.1	Pressure Calibration	27

6.5.2	Sample Flow (5.00 1pm) Calibration	27

6.5.3	PMT Calibration	29

6.6	TROUBLESHOOTING AND SERVICE	31

6.6.1	Fault Diagnosis	31

6.6.2	Flow Problems	32

7.0 DATA MANAGEMENT AND RECORDS MANAGEMENT PARAMETERS.32

7.1	DATA MANAGEMENT	32

7.2	RECORDS MANAGEMENT	34

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8.0 QUALITY CONTROL/QUALITY ASSURANCE	34

9.0 INSTALLATION INSTRUCTIONS	34

9.1	Indoor/Outdoor Installation	34

9.2	Aerosol Sample Conditioner (ASC) Connections and Installation	35

9.3	Temperature Probe Connection	37

9.4	Power Connection	39

9.5	Communications Interface Connections	39

9.6	Shelter Installation with Roof Penetration	39

9.7	Outdoor Enclosure Installation	41

9.8	Pneumatics	42

9.9	Instrument Start-up	42

10.0 MONTHLY QC AND MAINTENANCE SHEET	44

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1.0 SUMMARY OF METHOD

The Teledyne API Model T640 is a real-time, continuous particulate matter (PM) mass monitor
that uses scattered light spectrometry for measurement; specifically, it employs broadband
spectroscopy using 90° white-light scattering with a polychromatic light-emitting diode (LED).
The model T640 is an approved Federal Equivalent Method (FEM) for PM2.5 [EQPM-0516-236],
The T640 also measures PM10 and PM10-2.5, but only the PM2.5 fraction meets FEM requirements.
There is one pump in the T640 which operates at a flow rate of 5.0 1pm.

1.1	PRINCIPLES OF OPERATION

The Model T640 PM Mass Monitor is an optical aerosol spectrometer that converts optical
measurements to mass measurements by determining sampled particle size via scattered light at
the single particle level according to Lorenz-Mie Theory. In brief, the sampling head draws a
representative sample of ambient aerosol at a flow rate of 5 1pm. The aspirated particles are then
dried (i.e., brought below 35% RH) with the Aerosol Sample Conditioner (ASC) and moved into
the optical particle sensor where scattered light intensity is measured to determine particle size
diameter. The particles move separately into the T-aperture through an optically differentiated
measurement volume that is homogeneously illuminated with polychromatic light. The
polychromatic light source, an LED, combined with a 90° scattered light detection, achieves a
precise and unambiguous calibration curve in the Mie range, resulting in a large size resolution.

Each particle generates a scattered light impulse that is detected at an 85° to 95° angle where
amplitude (height) and signal length are measured; the amplitude of the scattered light impulse is
directly related to the particle size diameter. The T-aperture and simultaneous signal length
measurements eliminate border zone error, which is characterized by the partial illumination of
particles at the border of the measurement range.

1.2	METHOD REQUIREMENTS

The method requirements for the T640 were published in the Federal Register in Volume 81,
page 45285 on July 13, 2016 as part of the Federal Equivalent Method (FEM) Designation. These
requirements were published as: ' 'Teledyne Advanced Pollution Instrumentation Model T640 PM
mass monitor, '' continuous ambient particulate monitor operated at a volumetric flow rate of 5.0
Lpm, equipped with a TAPI 5-Lpm sample inlet (P/'N: 081050000), TAPI aerosol sample
conditioner (P/N:081040000), configured for operation with firmware version 1.0.2.126 or later,
and operated in accordance with the Teledyne Model T640 Operations Manual. This designation
applies to PM2.5 measurements only.

Additional requirements of operating the method may not be explicitly included as part of the
method designation; however, they would apply for consistency with standard monitoring

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practices and use of the data for comparison to the NAAQS. For example, the sample volume for
the method is reported at actual conditions (local conditions or LC) for PM2.5. Requirements such
as this should be referenced in a monitoring organization's Quality Assurance Project Plan
(QAPP).

Other requirements not explicitly stated as part of the method designation, included in the T640
operations manual, applicable sections of the CFR, or identified in an agency's QAPP, do not
apply.

2.0 DEFINITIONS

PM2.5 is particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 pm.
PM10 is particulate matter with an aerodynamic diameter less than or equal to a nominal 10 pm.
PM10-2.5 is coarse particulate matter with aerodynamic diameter in the nominal range of 2.5 to
10 pm.

Most technical terms in this SOP are defined as they are introduced. A few important definitions
are provided in Table 2-1. The terms monitor and instrument are used interchangeably in this
document.

Table 2-1. Terms and definitions.

Term

Definition

Accuracy

The degree of agreement between an observed value and an accepted
reference value; includes a combination of random error (precision) and
systematic error (bias) components due to sampling and analytical operations.

Actual conditions

The actual ambient temperature and pressure of a gas at the time its volume
(or volumetric flow rate) is measured.

Bias

The systematic or persistent distortion of a measurement process that causes
errors in one direction.

Calibration

The act of adjusting an instrument after comparison with a standard.

Chain-of-custody

Unbroken trail of accountability that verifies the physical security of
environmental samples and documented information.

Coefficient of variation

A standardized measure of dispersion of a probability distribution or
frequency distribution. Defined as the ratio of the standard deviation to the
mean.

Downtube

The vertically oriented tube that connects the PM2 5 sampler inlet to sampler
components inside the sampler case. To check the sample flow rate, the
sampler inlet is removed from the downtube and a flow rate standard is
connected in its place.

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Term

Definition

Flow adapter

A tight-fitting connecting device, with an isolating valve, that is inserted in
place of the PM2.5 sampler inlet on the upper end of a sampler's downtube
and used to connect a flow rate calibration or audit device to check the
sample flow rate. In some cases, the device may also be used for leak checks.
Sometimes referred to as the flow shut-off valve.

Flow calibration device

A National Institute of Standards and Technology (NIST)-traceable flow
determining apparatus (also called a flow rate standard) that is attached to the
flow adapter device and used to assist in measuring and setting the volumetric
flow rate of air into the sampler.

Impactor

An inertial particle-size separator. A PM2.5 reference method sampler uses a
specially shaped inlet followed by an impactor that allows only PM of well-
defined size ranges to penetrate to the filter collection portion of the collector.

Leak check

A test to determine if any post-air flow is passing the expected flow path of
the PM2.5 sampler.

Off Scan

When the data stream from the monitor is disabled from logging to the data
system. This is typically done during periods of maintenance, verifications, or
calibrations.

Orifice flow rate check
device

One type of flow rate calibration or check device (transfer standard), based on
an established relationship between flow rate and pressure drop across the
orifice plate. An orifice's operating characteristics are determined in the
laboratory using a flow rate standard such as a soap film flowmeter. Orifice
devices generally require temperature and pressure corrections. Modem
orifice flow rate check devices generally make the needed temperature and
pressure corrections for the user. The orifice flow rate check device most
commonly used on PM2.5 samplers may also be called a venturi.

Precision

A measure of mutual agreement among individual measurements of the same
properly, usually under prescribed similar conditions, expressed generally in
terms of standard deviation.

Verification

The act of checking or verifying an instrument against a standard; involves no
adjustment of the instrument.

3.0 HEALTH AND SAFETY WARNINGS

To avoid damage to the monitor, ensure that the AC power voltage matches the voltage indicated
on the monitor's model/specifications label located on the rear panel before plugging the T640
into line power. High voltages are present inside the instrument. Ensure that the power cord being
used is capable of carrying the power rating of the instrument (see rear panel label). Note:

• Ensure that the power connection has a functioning ground connection.

• Do not defeat the ground wire on power plug.

• Turn off instrument power before disconnecting or connecting electrical subassemblies.

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• Do not operate the instrument with its cover off.

Some repair and troubleshooting operations need to be carried out with the monitor open and
running. Use common sense when operating inside a running monitor. Exercise caution to avoid
electrical shocks and electrostatic or mechanical damage to the monitor. Do not drop tools into
the monitor or leave tools in the monitor after your procedures. Do not short or touch electric
connections with metallic tools while operating inside the monitor. For monitors installed in small
shelters, beware of external elements (i.e., weather conditions) when performing maintenance
which exposes the monitor to ambient conditions.

4.0 INTERFERENCES

There are no known interferences to the collection of PM2.5 using this method; however, surface
roughness and other variables do affect sizing algorithms in all light scattering instruments. Since
the PM concentration output is based on a calculation using the last 10 minutes of data, the
operator should wait a minimum of 10 minutes after reassembly of the instrument before turning
the data system to "On Scan."

5.0 EQUIPMENT AND SUPPLIES

5.1 INSTALLATION EQUIPMENT AND SUPPLIES

Installation requires hand tools (flat blade screw driver and adjustable wrench) and silicone
sealant. Most shelters have the necessary roof perforation needed. If not, it may be necessary to
work with the shelter manufacturer on the appropriate method for making the perforation. Most
of the routine equipment and supplies listed below will be needed for the initial installation to
ensure the instrument is operating properly.

5.2 ROUTINE EQUIPMENT AND SUPPLIES

The following equipment, supplies, and expendables are required for sensor checks, adjustments,
and operation:

1. HEPA filters (x2) configured with adapter to connect to downtube for zero testing.

2. Auditing device (NIST-traceable pressure and temperature standard and flow standard)
used for pressure, temperature, and flow verifications and calibrations. The auditing
device is required to have certification within the last 12 months.

3. SpanDust™ used for photomultiplier tube (PMT) verification and adjustment as needed.

4. O-ring grease packets or tube of vacuum grease.

5. Canned air for electronic use (e.g., DustOff, BlowOff electronics dusters).

6. Lint-free washable microfiber rags or lint-free disposable wipes.

7. Distilled water in a spray bottle.

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8.	Mild detergent.

9.	Swagelok® Cap for !4" tubing.

10.	Allen wrench.

11.	Philips screwdriver.

12.	Cleaning brushes.

13.	Cotton tipped applicators.

14.	Pull rope assembly (used for pulling cleaning rags or tube brush through the inlet tube).

15.	Disposable Filter Units (DFUs).

16.	USB flash memory drive (for firmware updates [when necessary] and manual data
downloads).

6.0 PROCEDURES

6.1	OPERATION

Upon startup, sampling begins. Allow a minimum of 20-minute warming period for reliable
readings. This should provide sufficient time for the LED temperature to stabilize (-10 minutes)
and then another 10 minutes for the smoothing algorithm to incorporate the data at a stable LED
temperature. Track LED temperature from the dashboard to ensure stability of the instrument.

6.2	MAINTENANCE AND SERVICE
6.2.1 Maintenance Schedule

As a part of routine system management, preventive maintenance includes inspections, cleaning,
verifications, and calibrations. Table 6-1 provides a list of actions and their frequencies.

Section 5.2 of the user manual describes procedures.

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Table 6-1. T640 Maintenance and QC Check Schedule.

Maintenance or Check Action

Tolerance

Frequency

Check Pump Performance

PWM1 value < 80%
PID1 value < 85%

Monthly

Check for leaks with zero filter

Acceptance criteria is 0.0 - 0.3 ng/m3
Action level is 0.1 to 0.3 ng/m3
(for each PM metric)

Monthly

Clean Inlet

NA

Quarterly

Check/Adjust PMT with
SpanDust™ (measured peak, limit
value displayed on bottle +/- 0.5)

Stated value on SpanDust™ bottle +/-
0.5 (e.g., 11.3 with a tolerance of 10.8 to
11.8)

Quarterly.

Avoid over performing
this procedure. If
problems persist, wait
10 minutes and retry.

Ambient Pressure

+/- 10 mm Hg

Monthly

Ambient Temperature

+/- 2°C

Monthly

Flow rate verification for sample
flow: 5.0 1pm

+/- 5% of standard compared to current
reading on T640; (e.g., 4.75 - 5.25 1pm
if T640 reads 5.00).

Monthly

Inspect and clean optical chamber
and relative humidity/temperature
(RH/T) sensors

NA

Every six months or as
needed, e.g., high dust
load

Change Disposable Filter Unit
(DFU) for 5-lpm sample flow

NA

Annually or when Pump
PWM value approaches
80%.

Inspect inner and outer sample
tubes

NA

Monthly or as needed

1 Pulse width modulation (PWM); proportional, integral, differential (PID) loop

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6.3 MAINTENANCE PROCEDURES

This section provides cleaning and maintenance information for the inlets and filters. Always

allow at least 10 minutes of operation after a procedure to ensure reliable operation.

6.3.1 Cleaning the T640 Inlet

To clean the T640 inlet (Figure 1), ensure data are "Off Scan."

1. Power off the pumps from the Setup >Vars >Pump Control menu. Pump choices are auto,
off, and cleaning cycle. Press 'edit" and then 'off to turn off the pumps.

2. Remove the sampling inlet from the downtube.

3. Place the flow audit adapter or HEPA filter on the downtube to minimize opportunity of
dust entering the monitor.

4. Disassemble the sampling inlet (unscrew the two screws at base of inlet and base plate).

5. Carefully and thoroughly remove any dust deposits from inside the inlet.

6. Remove any insects or other debris from the filtering screen.

7. Clean all the components using water and a mild detergent, if necessary.

8. Dry all components thoroughly with a clean cloth and blow canned air through the
nozzles.

9. Check and, if needed replace, the O-rings located on the outside and the inside of the base
plate, and grease them with vacuum grease.

10. Reassemble the sampling inlet, sliding the baseplate back into the base of the inlet body,
making sure to line up with the screw holes. The screws should be reinstalled using hand-
tight pressure.

11. Reconnect the sampling line.

12. Power up the pumps from the Setup >Vars >Pump Control menu. Press 'edit" and then
'auto" to turn the pumps back on. Allow 10 minutes for the system to return to reliable
operation. Ensure the data acquisition system is reengaged.

This procedure should be repeated per the schedule listed in Table 6-1.

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Water Collector —

— ASC Sample Tube

Figure 1. T640 Inlet (standard) and ASC Assembly.

6.3.2 Changing the Disposable Filter Units (DFUs)

There is one DFU on the T640 - an internal filter for the 5.0 1pm pump (Figure 2). Forthis
procedure, ensure data are "Off Scan."

Internal Pump Filter:

1.	Power off the internal pump from the control menu: Setup >Vars >Pump >Edit >Off
>Done.

2.	Remove the screws at the sides of front panel, if installed.

3.	Pull open the instalment's front panel, using the front panel finger grips (Figure 3).

4.	Write "New" and today's date on the filter with a sharpie (recommended).

Figure 2. Disposable Filter Unit (DFU) labeled as new.

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Figure 3. Opening the front panel.

5. Noting its orientation, remove the old DFU by detaching from the pneumatic quick-
connect fittings, and replace with a new DFU matching the orientation (Figure 4).

Figure 4. Internal DFU.

6.	Power on the internal pump from the control menu: Setup >Vars >Pump >Edit >Auto
>Done.

7.	Review the internal pump flow rate reading in Dashboard or Flome Screen to ensure the
5.0 1pm flow is reading as expected: >Main Menu >Home >Dashboard.

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6.3.3 Checking Pump Performance

The internal 5 1pm pump must maintain proper flow for measurement accuracy. Check the PWM
performance level in the Dashboard (if this parameter is not found in the Dashboard, configure
the Dashboard to add it; see Section 3.2.9 of the T640 User Manual). The Pump PWM should be
running between 35% and 80%.

It is strongly recommended to pay attention to the sample flow and PWM reading. This is
recorded monthly on the Monthly QC and Maintenance Sheet (see section 10 of this SOP). If any
issues are found with flow verification or calibration, refer back to the Pump PWM reading when
the instrument was known to be performing within acceptable flow and PWM tolerances. If a
new DFU filter is placed in the instrument and the Pump PWM does not return to near where it
was reading when the filter was previously new then troubleshoot by inspecting all sample lines
looking for SpanDust or anything else that may be affecting the flow. See Table 6-2 for
additional troubleshooting guidance.

6.3.4 Checking the Flow

Check the Sample Flow levels in the Dashboard (if it's not found in the Dashboard, add it through
the Dashboard configuration page; see Section 3.2.9 of the T640 User Manual). If out of range
(5.00 1pm, +/- 0.25 1pm for sample flow rate, so 4.75 1pm to 5.25 1pm), refer to Table 6-2 for
troubleshooting guidance.

6.3.5 Cleaning the Optical Chamber and the RH/T Sensor

Cleaning the optical chamber and sample lines connecting to the chamber should be performed at
least every 6 months and more frequently if issues are suspected; however, it can be a somewhat
tedious procedure, especially for installations in small shelters located outside. Before starting,
carefully consider and plan for an appropriate amount of time to perform this procedure,
including disassembly and reassembly, as well as all associated verifications and calibrations. For
outdoor shelters, additionally consider if any precipitation or extreme weather is forecasted. As
much as four hours may be needed to fully complete the procedure for outside installations and
two hours for indoor ones when using a slip coupler. Also, we highly recommend taking a few
photos with a smart phone or similar device prior to disconnecting any of the sample lines inside
the monitor.

For this procedure, ensure data are "Off Scan."

1. Power down the monitor and unplug.

2. Power down the bypass pump.

3. Disconnect the ASC power line from the back of the instrument.

4. Adjust the slip coupler and move the monitor to the side so that there is enough room for
the ASC to be removed (see procedure 6.4.2).

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5.	Remove and clean both the extension tube and the upper inlet tube that sit directly above
the ASC (Figure 21).

6.	Remove the ASC by carefully lifting it up from monitor chassis.

7.	Remove and clean the Aluminum Adapter (Figure 19) that fits over the black inlet
nozzle. Check the O-ring that sits on the adapter for cracks or breaks; clean and/or
replace as necessary.

8.	Remove and clean the Black Inlet Nozzle (Figure 18) sample tube that fits on top of the
optical cell.

9.	Unscrew the monitor lid (it may have 4 screws, 2 on each side) and lift the lid off of the
monitor chassis.

10.	It is recommended to take photos of the sample line connections with a smart phone or
similar device.

11.	Remove all pertinent connections from the ASC support, which include the ASC
support's black electrical connector from the circuit board, tubing from the outlet of the
DFU, and tubing from the outlet of the pulsation dampener.

12.	Remove the ASC support, which straddles the sensors. Four screws secure that support to
the floor of the instrument, two on each footing (Figure 5). Note: it is possible to clean
the optics without removing the ASC support; however, removing the ASC support will
allow more room to access the tubing lines and optical chamber.

two screws per footing

Figure 5. Maintenance: Optical Chamber and RH/T Sensor Access.

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13. Locate the optical cell, the cup at the bottom of optics chamber and its tubing, and the
Relative Humidity and Temperature (RH/T) sensor (Figure 6).

Figure 6. Maintenance: Location of Optics Chamber and RII/T Sensor.

14. Remove the optical cell from the optics chamber, and remove the cup, including its
tubing, from the optics chamber bottom; detach the RH/T sensor tubing from the DFU
filter (Figure 7). It is very important that all components are disassembled before blowing
air into the chamber.

RH/T sensor	RH/T sensor tubing

optical

tubing between cup
at optics chamber
bottom and RH/T sensor

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Pull T-cell from optics chamber. Fit is very

Remove hex screws, tight, but DO NOT USE TOOL TO PRY OUT.

Figure 7. Maintenance: Optical Chamber Disassembly.

15. Clean the optics chamber's interior surfaces, ensuring to include windows, with a lint-
free cloth (Figure 8).

Figure 8. Maintenance: Optics Chamber Windows.

16. Use canned air made specifically for dusting electronics to blow any dust or other debris
from the optics chamber, from the cup, from the bottom of the optics chamber, and from

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the tubing (Figure 9).

Figure 9. Maintenance: Final Dusting.

17. When cleaning has been completed, reassemble the optics chamber components; reinsert
the cup to the bottom of optics chamber; reconnect the tubing from the cup in bottom of
the chamber to the RH7T sensor and from the RH/T sensor to the DFU filter, reinstall the
ASC support, re-connect all power and flow lines, and move the monitor back in line so
that the slip coupler can be reconnected.

18. Close the instrument and power back both the bypass pump and monitor.

19. Review dashboard to ensure all flows are operating as expected.

20. Perform a Zero Test (Section 6.4.1 of this SOP).

21. Perform a PMT sensor check with the SpanDust™ (Section 6.4.6 of this SOP).

6.3.6 Inspecting the Sample Tubes

Look inside the sample tubes for debris or dust on the walls. If needed, push a rag or a paper
towel through the tubes; then use canned air made specifically for electronics to blow through the
line for final cleaning. However, do not completely block a sample tube still under vacuum, as the
sample flows should never be blocked while the unit is still operating

6.4 INSTRUMENT VERIFICATIONS

There are five basic verification checks listed below. All verifications should be conducted first
before any calibrations, and then calibrations can be conducted (see Section 6.5) where necessary.
Verifications are conducted before calibrations as this is necessary to document the "as found"
conditions of the instrument. Three of the verifications can be calibrated, if necessary. There is no
adjustment for either the zero test or ambient temperature and as such failure of one or both of
these checks results in the need to troubleshoot rather than adjust a setting. The Zero Test,
Pressure sensor, Ambient Temperature sensor, and Flow sensor verifications are all performed
monthly. The PMT verification using SpanDust™ is performed quarterly. All five checks should
always be performed in the specific order shown below:

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1. Zero Test;

2. Pressure sensor verification;

3. Ambient Temperature sensor verification;

4. Flow sensor verification;

5. PMT verification using SpanDust™.

Once all verifications are completed, calibrations may be conducted (see Section 6.5), where
necessary, for pressure, flow, and the PMT. For the Pressure Cal and the Flow Cal menu, note
that the "Measured" parameter provides the value measured by the T640, and the "Actual"
parameter is the value that is to be input from the reading measured by the external auditing
device.

6.4.1 Zero Test

The internal components of the T640 are not meant to be under strict vacuum as what would
normally be done in a leak test. So, to avoid damage to internal components, it is recommended
that the inlet never be capped (airtight) while the instrument pumps are running.

The Zero Test is a way to check for leaks that do not involve pulling a vacuum on the system.
Note: no adjustment is made if the zero test is not acceptable; rather troubleshoot the instrument
until resolved. For this procedure, ensure data are "Off Scan."

There are two options to perform a zero test. In the first (and recommended) zero test instructions
the calibration software is initiated to bypass the boxcar 10-minute smoothing of data. This
allows an almost immediate response of the PM channels to their expected reporting of 0.0 (ig/m3
for each PM metric. In the second set of instructions a manual zero test can be run without
initiating the calibration software. However, this approach to a zero test requires waiting at least
10-minutes so that each channel of data can be smoothed according to the corresponding setting
from the boxcar (i.e., 10 minutes). Only one type of zero test is to be performed. Each set of
procedures are explained below:

Zero Test with near immediate response:

1. Remove the inlet and fit a HEPA filter to the sample port. Ensure the tubing is not
kinked.

2. From the main screen on the T640 panel display, select:

"Calibration";

"Leak Check"; and
- "Start".

3. Observe the front panel display on the monitor until the PM values (PMio and PM2 5
channels) are presented and steady; record to "Monthly QC and Maintenance Sheet".

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4. If each PM value reaches 0.0, accept the zero test and move to step 7. If data are in the
range of 0.1 to 0.3, accept the data and troubleshoot. If after ten or more minutes the data
are still at 0.4 or greater, identify the data as suspect on the "Monthly QC and
Maintenance Sheet" and troubleshoot. If the PM values are not reading zero, then it's
likely to be one of two issues:

There may be a leak in the system above the optical sensor (i.e., from the optical
sensor nozzle up to where the HEPA filter was fitted). Troubleshoot by checking
each connection between monitor and HEPA filter and ensuring there is a good
seal or:

It is possible the HEPA filter being used is either bad or leaking. It is
recommended to have a second filter handy to check.

5. If after following these steps each PM channel does not reach (0.0), repeat steps above
including resealing the HEPA filter to the sampler port and cleaning the downtube with a
lint free cloth and use of a dowel.

6. Record any updated results to the "Monthly QC and Maintenance Sheet."

7. Once each PM channel reaches zero (0.0) for each PM metric, press "Stop" and then the

home button.

8. Disconnect the HEPA filter.

9. Disassemble the zero apparatus.

Manual Zero Test:

1. Remove the inlet and fit a HEPA filter to the sample port. Ensure the tubing is not
kinked.

2. Observe the PM values on the front panel display. Press either "Home" or the key.

3. After approximately 10 minutes, the PM values should be at zero (0.0) for each PM
metric. If data reaches 0.0, accept the zero test and move to step 5. If data are in the range
of 0.1 to 0.3, accept the data and troubleshoot. If after ten minutes or more the data are
still at 0.4 or greater, identify the data as suspect on the Monthly QC and Maintenance
Sheet and troubleshoot. If the PM values are not reading zero, then it's likely to be one of
two issues:

It is possible the HEPA filter being used is either bad or leaking. It is
recommended to have a second filter handy to check.

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May 10th, 2019

4. If after ten minutes from any adjustment, values don't reach zero (0.0), troubleshoot and
repeat steps above.

5. Once PM values reach zero (0.0) for each PM metric, disconnect the HEPA filter.

6. Record to "Monthly QC and Maintenance Sheet."

6.4.2 Alternative Procedure for Walk-in Shelters.

For walk-in shelter installations, a single operator will be challenged to review data on the front
panel of the monitor while performing QC verifications and calibrations on a roof. Two operators
could be used; however, in most cases this is not practical. To allow verifications and calibrations
for walk-in shelter applications, Teledyne has a slip coupler which can be utilized to allow audit
devices and Span Dust to be used from inside the shelter. The procedure for use of the slip
coupler does not apply to zero tests as the HEPA filter should be installed on the downtube where
the standard T640 inlet is normally connected to the downtube on the roof. Also, the procedure
for verifying ambient temperature needs to be conducted on the roof so that the routine ambient
temperature probe can be checked. For all other verifications and calibrations, where necessary,
the following applies to using a slip coupler. For this procedure, ensure data are "Off Scan."

1. Holding the downtube above the slip coupler with one hand, lift the slip coupler with
your other hand from its current position to a height just high enough so that the slip
coupler is no longer touching the aluminum downtube below (Figure 10). The downtube
above the slip coupler should be held in a consistent vertical position so that the seal
between the downtube and roof flange is maintained.

Figure 10. Slip coupler in normal position and lifted vertically.

2. Carefully move the T640 monitor chassis and ASC away from the downtube
is enough clearance for the audit device to be attached. This requires moving
the monitor (Figure 11).

so that mere
the base of

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May 10"', 2019

[

n
§

Figure 11. Slip coupler moved to the side to allow monitor use with audit devices.

3. Detach the ambient temperature probe on the back of the monitor and temporarily attach
the short cable temperature probe so that the temperature inside the shelter is being used
for calculations of flow.

4. Perform remaining verifications and where applicable, calibrations. A verification of the
short temperature probe is also recommended.

5. With all verifications and calibrations complete, detach short cable temperature probe and
re-attach the ambient temperature probe from the roof.

6. Align the T640 monitor chassis so that the ASC is directly below the slip coupler.

7. Holding the downtube above the slip coupler with one hand, reengage the slip coupler
back to its original position with your other hand. The downtube above the slip coupler
should be held in a consistent vertical position so that the seal between the downtube and
roof flange is maintained.

8. Visually inspect downtube to ensure it is plumb. Use a level if available.

6.4.3 Pressure Verification

The pressure measurement of the T640 is for the ambient pressure in which the instrument is
operated. No direct pneumatic connection to the instrument needs to be made to perform this
check and data are not affected. To change pressure units to mm Hg, go to Setup >Vars >Pressure
Units >mmHg.

1. With the Pressure Standard operating and measuring the ambient pressure in the same
room as the T640 monitor, navigate to the Pressure Cal menu: >Calibration >Pressure
Cal. Alternatively, pressure can be obtained through the dashboard on the main screen.

2. Compare the "Measured Pressure" in this screen to the Audit Pressure Standard
(Figure 12).

3. If the two values differ by more than +/- 10 mm Hg, note on "Monthly QC and
Maintenance Sheet" and continue with the remaining verifications.

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May 10th, 2019

Pressure Cal "3 0 1 11:29:24 AM

Sample Flow Cal

To adjust the Actual Pressure setting, dick the value.
Press the Calibrate button to proceed.

Figure 12. Pressure calibration screen.

6.4.4 Ambient Temperature Verification

The ambient temperature probe can be verified; however, there is no available way to calibrate
this sensor. Temperature probes that do not meet the expected tolerance of +-2°C from a
temperature standard should be inspected and cleaned. Cleaning of the gill screen may also help
to ensure air can pass freely to the probe. A spare temperature probe should be available in case
the verification continues to fail the acceptable tolerance. The following procedure applies to a
temperature verification:

Temperature verifications can be conducted either with the instrument in normal operation or
with the unit operating, but "Off Scan"

1. Obtain the ambient temperature reading from the front panel of the T640 monitor.
Alternatively, ambient temperature can be obtained through the dashboard on the main
screen.

2. Hold the temperature probe of the audit device in close proximity to the gill screen which
houses the ambient temperature probe of the T640. If there is direct sunlight, ensure the
audit probe is held behind the gill screen relative to the sun so that the gill screen casts a
shadow on the audit device temperature probe.

3. Wait at least one minute for the audit device temperature to stabilize.

4. Record the audit device ambient temperature and T640 ambient temperature to the
"Monthly QC and Maintenance sheet."

5. Compare the audit temperature to the T640's displayed ambient temperature. If the
difference between the two temperatures exceeds +/-2°C, troubleshoot and repeat.

6. If the verification cannot meet the required +/- 2°C tolerance, replace the temperature
probe and repeat the verification test.

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May 10th, 2019

6.4.5 Sample Flow (5.0 1pm) Verification.

Flow rate verifications for sample flow rate (5.0 1pm) can be conducted with the instrument
operating normally so long as the data are "Off Scan:' Although this section is for verifications,
the information available in the flow rate calibration screen may also be useful for verifications.
The flow calibration screens can be accessed at: >Calibration >Sample Flow Cal. Flow rate
calibration procedures are detailed in Section 6.5.2.

Verification of Sample Flow (5.01pm). For this procedure, ensure data are "Off Scan/'

1. Set up your NIST-traceable flow standard transfer device with the appropriate inlet for
the flow to be calibrated. Ensure the audit device is appropriately sized for 5.0 1pm flow.

2. Remove the inlet from the Upper Inlet Tube.

3. Connect the Flow Standard to the top of the Upper Inlet Tube. Ensure the tubing
connecting the inlet to the Flow Standard is not kinked.

4. With the T640 running, go to the Calibration >Sample Flow Cal menu. Alternatively, you
can view sample flow from the dashboard.

5. Wait at least one minute for the flow to re-stabilize.

6. Compare the ''Measured Flow" in this screen to the Flow Standard (Figure 13) and
determine if these values differ by more than 5%, (e.g., outside of 4.75 - 5.25 1pm for
sample flow, if the sampler reads 5.00).

7. Record the measured flow rate difference on the "Monthly QC and Maintenance Sheet."
If the sample flow rate meets the required tolerance, then you are done with the sample
flow verification. If the sample flow rate is outside of the acceptable tolerance, perform a
sample flow calibration as detailed in Section 6.5.2.

8. Record the results on the "Monthly QC and Maintenance Sheet."

Flow 5 Calibration -~] 2 3:24:34 PM

Sample Flow Cal adjust the Actual Flow setting, cTrck ehe value.

Press the Calibrate button to proceed.

Pressure Cal

Figure 13. Sample Flow calibration screen.

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May 10"', 2019

6.4.6 PMT Verification - (Performed Quarterly)

The Particle Sensor PMT verification uses SpanDust™, a monodisperse dust with a specific
spherical diameter and known refractive index. All T640 instrument PMTs have a very specific
response to this span dust which allows for the sensor to be checked and adjusted in the field for
drift caused by contamination of the optics. This is not a calibration of the optical sensor based
on the mass concentration of dust being used, but simply a mechanism to check and adjust the
PMT response to particles with a specific and known refractive index.

Note: Although the PMT verification is a very useful check that tells the user if the performance
of the monitor spectrometer is as expected, multiple checks of the PMT or individual verifications
that lead to too must span dust entering the monitors optics can itself lead to poor performance of
the monitor's spectrometer, flow system, and/or RH sensor. Careful attention needs to be made to
ensure a minimum amount of span dust enters the sample tube during a verification and that
repeats of verifications are kept to a minimum.

For a step by step demonstration of the PMT Adjustment, use the QR code below to view a video
by Teledyne API. Also available at: https://www.voutube.com/watch?v=pZYnXwYwtls.

For this procedure, ensure data are "Off Scan."

1. Navigate to the PMT Adjust screen: >Home >Calibration
>PMT Adjust.

2. Press the Start button on this screen to suspend normal data
acquisition and to start this adjustment process.

3. Remove the T640 sample inlet.

4. Prepare the SpanDust™ bottle by uncapping the "air intake"
tubing on the cap of the bottle.

5. Place the tube from the SpanDust™ bottle into the top of the
Upper Inlet Tube for the instrument.

6. Ensure that the silicone tube fits snugly inside the aluminum inlet tube, and do not allow
the bottle to hang, as it could dislodge the silicone tube from the inlet tube.

7. Gently tap the SpanDust™ bottle to barely agitate the contents just enough to allow the
dust to be pulled into the sensor, and allow 30 seconds for the Peak Channel reading in
this screen to respond (Figure 14).

8. Record the maximum Peak Channel. PMT Setting and Peak Channel Counts to the
"Monthly QC and Maintenance Sheet."

9. If the Peak Channel reading meets the acceptable ± 0.5 of SpanDust™ value stated on
bottle, then proceed to step 11.

PMT
Adjustment
Video

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May 10th, 2019

10. If the Peak Channel is not acceptable, then retry one more time by pressing the "Stop"
button, then the "Start" button on the T640, then proceed to step 7 above. If after two
tries the Peak Channel is still not acceptable, then move to the instrument calibration
procedures described in Section 6.5

PMT Adjust

Sample Flow Cal
Bypass Flow Cal
Pressure Cal

PMT Adjust



i M111 ii I |'i i if mi 11II11 mi | ii H|HII| IIII111II11 ii 1111 n |

30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30

Peak
Adjust

>>
<<

Peak Channel: 11.1
PMT Setting: 1450 V
Peak Channel Counts: 240

> Home > Calibration

Mode: SAMPLE



Figure 14. PMT adjust screen.

11.	Reattach the sample inlet and press the Stop button to stop the adjustment process and
resume normal data acquisition.

12.	Wait 10 minutes, review data on the home screen of the T640, and then bring unit back
"On Scan" in the data system.

6.5 INSTRUMENT CALIBRATIONS

There are three checks of the monitor that can be calibrated. These calibrations are performed
after all verifications (see Section 6.4) are conducted. Calibrations only need to be performed for
the checks not meeting their expected performance criteria. The checks that can be calibrated are
conducted in the following order, as necessary:

1.	Pressure sensor calibration;

2.	Flow sensor calibration and re-verification; and

3.	PMT calibration using SpanDust™.

26

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May 10th, 2019

6.5.1 Pressure Calibration

The pressure measurement of the T640 is for the ambient pressure in which the instalment is
operated. No direct pneumatic connection to the instrument needs to be made to perform this
calibration and data are not affected.

For this procedure, ensure data are "Off Scan."

1.	With the Pressure Standard operating and measuring the ambient pressure in the same
room as the T640 monitor, navigate to the Pressure Cal menu: >Calibration >Pressure
Cal.

2.	Compare the "Measured Pressure" in this screen to the Audit Pressure Standard
(Figure 15).

3.	If the two values differ by more than +/- 10 mm Fig, then press the value button in the
"Actual Pressure" field, enter the value measured by the Pressure Standard and press
""enter." Then press the: "Calibrate" button on the screen.

4.	Record the test results on the '"Monthly QC and Maintenance Sheet."

The Measured Pressure value should change to closely match the Actual Pressure within a few
seconds.

Pressure Cal "jf 11:29:24 AM

Sample Flow Cal

To adjust the Actual Pressure setting, dick the value.
Press the Calibrate button to proceed.

Figure 15. Pressure calibration screen. IMPORTANT: Perform this calibration
prior to any flow calibration.

6.5.2 Sample Flow (5.00 lpm) Calibration

Flow rate calibration is conducted on the sample flow (5 lpm) by going to the sample flow rate
calibration menu at: "-Calibration >Sample Flow Cal. Once the flow is calibrated, it should be re-

27

-------
May 10"', 2019

verified to make sure it is within a tolerance of +1-2%. The flow calibration should be conducted
after all verifications and a pressure calibration have been performed, as necessary.

Calibration of Sample Flow (5.0 1pm). For this procedure, ensure data are "Off Scan."

1. Set up your NIST-traceable flow standard transfer device with the appropriate inlet for
the flow to be calibrated. Ensure the audit device is appropriately sized for 5.0 1pm flow.

2. Remove the inlet from the Upper Inlet Tube.

3. Connect the Flow Standard to the top of the Upper Inlet Tube. Ensure the tubing
connecting the inlet to the Flow Standard is not kinked.

4. With the T640 running, go to the Calibration >Sample Flow Cal menu.

5. Wait at least one minute for the flow to re-stabilize.

6. Compare the "Measured Flow" in this screen to the Flow Standard (Figure 16) and
determine if these values differ by more than 5%, (e.g., outside of 4.75 - 5.25 1pm for
sample flow, if sampler reads 5.00).

7. Record the test results on the "Monthly QC and Maintenance Sheet." If the sample flow
meets the required tolerance, proceed to step 13 as you are done with the sample flow. If
the sample flow rate is outside of the acceptable tolerance, continue with step 8 to
perform a calibration of the sample flow rate.

8. If the Sample flow is off by more than 5%, press the "Start" button (this disables the
internal data logging), and then "Actual Flow."

9. Enter the value measured by the Flow Standard and hit "Enter," then press the
"Calibrate" button on this screen. The Measured Flow rate value should change to closely
match the Actual Flow rate within a few seconds.

10. Record the results on the "Monthly QC and Maintenance Sheet."

11. Continue reading the flow rate standard and ensure standard is within 2% of the measured
flow (4.90 -5.10 1pm). Record the test results on the "Monthly QC and Maintenance
Sheet."

12. Press "Stop" on the sample flow calibration menu to end the sample flow calibration
procedure and return to normal operation.

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May 10th, 2019

Flow 5 Calibration

3:24:34 PM

Sample Flow Cal

Pressure Cal
PMT Adjust

To adjust the Actual Flow setting, dfck She value.
Press the Calibrate button to proceed.

Measured Flow; 4.80 LPM

Actual FEow: I

Status: Never Run

> Bonne > Calibration

Mode: SAMPLE

Figure 16. Sample Flow calibration screen.

6.5.3 PMT Calibration

Once all verifications and any necessary calibrations to the pressure and flow systems are
complete, an adjustment of the Particle Sensor PMT may be performed using SpanDust™. A
calibration of the PMT is an adjustment in the field for drift caused by contamination of the
optics. Note: Careful attention needs to be made to ensure a minimum amount of SpanDust™
enters the sample tube during an adjustment of the PMT and that repeats of this calibration are
kept to a minimum

For a step by step demonstration of the PMT Adjustment, use the QR code below to view a video
by Teledyne API. Also available at: https://www.voutube.com/watch?v=pZYnXwYwtls.

For this procedure, ensure data are "Off Scan."

1. Navigate to the PMT Adjust screen: >Home >Calibration
>PMT Adjust.

2. Press the Start button on this screen to suspend normal data
acquisition and start this adjustment process.

3. Remove the T640 sample inlet.

4. Prepare the SpanDust™ bottle by uncapping the "air intake"
tubing on the cap of the bottle.

5. Place the tube from the SpanDust™ bottle into the top of the
Upper Inlet Tube for the instrument.

PMT
Adjustment
Video

-------
May 10th, 2019

6. Ensure that the silicone tube fits snugly inside the aluminum inlet tube, and do not allow
the bottle to hang, as it could dislodge the silicone tube from the inlet tube.

8. Record the maximum Peak Channel. PMT Setting and Peak Channel Counts to the
"Monthly QC and Maintenance Sheet."

9. If the Peak Channel reading is acceptable ± 0.5 of SpanDust™ value stated on bottle^
then proceed to step 13.

10. If the Peak Channel is not acceptable, then retry one more time by pressing the "Stop"'
button, then the "Start'' button on the T640, then proceed with step 7 above.

11. If after two tries the Peak Channel reading is not within ± 0.5 of SpanDust1 M value stated
on bottle, then adjust the PMT Setting by pressing the Peak Adjust left (decrement) or
right (increment) buttons to center the Peak voltage (Figure 17). Each press of a button is
1 volt, so press the Peak Adjust button by as many times as the number of volts the
reading is off.

PMT Adjust

-3

•

Sample Flow Cal
Bypass Flow Cal
Pressure Cal

[ J

Peak
Adjust

PMT Adjust

1 -30 -25 -20 -15

m 111 n11mi I mt 11 m| n n 11 m |m11111111

-10 -5 0 5 10 15 20 25 30

Stop

Peak Channel:
PMT Setting:
Peak Channel Counts:

11.1

1450 V
240

V
«

Home > Calibration

Mode: SAMPLE

Figure 17. PMT adjust screen

12. Allow 30 seconds for the Peak Channel reading in this screen to respond, and if it is not
± 0.5 of SpanDust™ value stated on bottle, repeat the process. This could take several
tries over a long period when conducted in a humid environment.

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May 10"', 2019

13. Once the Peak Channel reading is ± 0.5 of SpanDust™ value stated on bottle, record the
test results on the "Monthly QC and Maintenance Sheet."

14. Reattach the sample inlet and press the Stop button to stop the adjustment process and
resume normal data acquisition.

15. Wait 10 minutes, review data on home screen of T640, and then bring unit back "On
Scan" in the data system.

6.6 TROUBLESHOOTING AND SERVICE

This section provides guidance for resolving fault conditions and possible flow and calibration
problems.

1. To review Alerts, select >Alerts.

2. Document any alerts, including date and time to the "Monthly QC and Maintenance
Sheet."

3. To clear alerts, select the following: >Alerts >Select >Clear Selected. Then select the
home button.

4. If alerts reappear, then there is something wrong and this need to be diagnosed. See
below.

6.6.1 Fault Diagnosis

The Alerts log may be useful in diagnosing faults. Table 6-2 lists some of the Alerts that are
triggered by faults, describes their likely causes, and provides possible solutions.

Table 6-2. Alerts and Recommendations

Message

Description

Possible Solution(s)

System Reset

Warning raised when the system is reset

Normal power cycle occurred? If
not, check external power source.

Sample Flow High

The Sample Flow is greater than 5.25 1pm

Check pneumatic fittings.
Re-calibrate flow.

Sample Flow Low

The Sample Flow is less than 4.75 1pm

Check pneumatics. Check for
blockages. Re-calibrate flow.

Sample RH High

The Sample RH is above the set point

Check if ASC is plugged in.

Check control board if ASC control
LED is illuminated.

Check if water is in the sensor.

Check LED

If the LED temperature is equal to the box
temperature, the LED may be OFF

Cycle power.

Call Teledyne-API Tech Support.

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May 10"', 2019

Message

Description

Possible Solution(s)

Check PMT

The PMT HV setting is out of range (800 -
2200)

Check Sensor with SpanDust™.
Perform an optical chamber cleaning.
Call Teledyne-API Tech Support.

Sample Flow Slope
OOR

The Sample Flow Calibration Slope is Out
Of Range (OOR)

Check pneumatics for leaks.

Re-run flow calibration.

Call Teledyne-API Tech Support.

Check Int Pump

Check the internal pump if the PWM is

>80

Check pneumatics for blockages.
Check pneumatics for leaks.
Check flow calibration.

Replace pump.

Sample Temp
Warning

Sample Temperature Warning (>60)

Check ASC (is it latched ON?)
Ensure proper climate and
ventilation for instrument.

Box Temp Warning

Box Temperature Warning (>60)

Ensure proper climate and
ventilation for instrument.

AMB Press Slope
OOR

Ambient Pressure Calibration Slope is out
of range

Check calibration (make sure units
match calibration device).

Replace pressure sensor.

Call Teledyne-API Tech Support.

6.6.2 Flow Problems

If a flow auditing device indicates any problems with the flow rate, check to ensure the following:
all connections are seated tightly and evenly (no gaps);
the inlet is not clogged or blocked;

the pump is running and within expected PWM range (35% - 80%);

internal tubing appears free from SpanDust™ or any other restricting debris;

the DFUs appear reasonably clean and changed within last 12 months; and

ensure flow audit device is operating properly (e.g., is the unit appropriately charged).

After making any adjustments, run a flow rate calibration and recheck the flow rate. If problems
persist, contact Teledyne-API Technical Support for assistance.

7.0 DATA MANAGEMENT AND RECORDS MANAGEMENT

PARAMETERS

7.1 DATA MANAGEMENT

Data collected by the T640 at the monitoring site will be stored on a data acquisition system
(DAS). Data can be remotely polled for upload into a centralized database. Ensure data backups
are conducted a regular basis.

32

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May 10"', 2019

The in-situ DAS will be a commercially available computer based unit capable of retrieving
digital records from the station instruments via an Ethernet connection. It will store 1 minute
averages from the instruments. The instrument will store approximately 1 year of data internally
and data can be retrieved at any time to fill in any missing data in the database due to transfer
issues.

Table 7-1 lists the parameter, method, and unit codes for the T640 and T640x data.

33

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May 10"', 2019

Table 7-1. Parameter, method, and unit codes.

Parameter
Description

Parameter
Code

Method Code
for T640
at 5.0 lpm

Method Code
for T640x
at 16.67 lpm

Units

Unit Code

pm25

88101

236

238

Micrograms/cubic
meter (LC)

105

PMio-LC

85101

236

239

Micrograms/cubic
meter (LC)

105

PMh,-2 5 LC

86101

236

240

Micrograms/cubic
meter (LC)

105

PMio STP

81102

not available

239

Micrograms/cubic
meter (760 mm Hg,
25°C)

001

7.2 RECORDS MANAGEMENT

Field site visits will be stored in site log books documenting access to the monitoring sites and the
key activities performed. Details on routine QC and maintenance are recorded to the "Monthly
QC and Maintenance Sheet."

8.0 QUALITY CONTROL/QUALITY ASSURANCE

The instrument will be operated in accordance with the manufacturer's recommendation. The
maintenance recommendations presented above, including the recommended verifications and
adjustments, will be followed. Alerts (diagnostic codes) issued by the instrument will be reviewed
and appropriate corrections will be initiated when indicated. The alerts will be retained as part of
the instrument data. Daily review of instrument output is made to ensure operability. Data
reasonableness will also be assessed to ensure instrument output is consistent with expectations
for the instrument location, time of day, typical concentrations, and season.

9.0 INSTALLATION INSTRUCTIONS
9.1 Indoor/Outdoor Installation

This section presents the various connections for setup and preparing the instrument for
operation. The T640 can be installed in an indoor or outdoor shelter with roof penetration or in an
outdoor enclosure. Section 9.2 provides step-by-step instructions for ASC connections and
installation. If the instrument is being installed in a shelter with roof penetration, see Section 9.6
for installation instructions. If the instrument is being installed in an outdoor enclosure
installation, see Section 9.7 for installation instructions.

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May 10th, 2019

Ensure that the rack installation provides proper ventilation clearance (minimum of 1" from the
sides and top of instrument and 4" from the back of instrument) and inlet height (2 m above
ground level).

9.2 Aerosol Sample Conditioner (ASC) Connections and Installation

The ASC requires an inlet nozzle and an adapter for installation. The black inlet nozzle to the
optical sensor is specific to the instrument (not interchangeable to other T640 instruments). Please
note, the final assembly differs slightly between the T640x ASC and the T640 option ASC.

1. Insert the black inlet nozzle through the center of the support collar into the top of the
optical sensor, seating it tightly so that the nozzle's upper O-ring flange is flush with the
upper surface of the sensor body (Figure 18).

Figure 18. ASC Setup: Inlet Nozzle.

2. Slide the aluminum adapter over the black inlet nozzle, ensuring its base is flush with the
top of the optical sensor (Figure 19).

35

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May 10th, 2019

Figure 19. ASC Setup: Aluminum Adapter.

3. Attach the water collector to the inlet (Figure 20).

Figure 20. Water Collector Attached to Inlet.

4. Assemble the inlet and the ASC as depicted in Figure 21, ensuring the parts fit snugly
with no gaps. Note that if the instrument is to be installed in a shelter with roof
penetration, leave the inlet with the water collector off for now.

36

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May 10"', 2019

— T640 Inlet

Water Collector —

— Upper Inlet Tube

— ASC Sample Tube

Figure 21. 640 Inlet (standard) and ASC Assembly.

5.	Lower the ASC into the support collar, ensuring it fits straight with no gaps.

6.	Plug the ASC wiring into the rear panel connector.

9.3 Temperature Probe Connection

1. Plug the ambient temperature probe connector into its respective rear panel electrical port
(Figure 22).

37

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May 10th, 2019

Figure 22. Ambient Temperature Probe and ASC Connections.

2.

Route the probe outside and insert it into solar shield, ensuring the solar shield maintains
a vertical orientation (Figure 23).

Figure 23. Ambient Temperature Probe Installed in Solar Shield.

38

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May 10"', 2019

9.4 Power Connection

Adhering to the warning messages, insert the power cord between the instrument's AC power
connector and a properly rated power outlet.

9.5 Communications Interface Connections

For network or Internet communication with the instrument, connect an Ethernet cable from the
analyzer's rear panel Ethernet interface connector to an Ethernet port. The address settings default
to automatic configuration by Dynamic Host Configuration Protocol (DHCP). Most users will
want to configure the instrument with a static IP address; however, you should consult your
network administrator to discuss other potential options. For data downloads and firmware
updates, use a flash drive inserted into the front panel USB port. See Section 3.2.6 of the User
Manual.

9.6 Shelter Installation with Roof Penetration

For rooftop installation instructions recommended by Teledyne API see the video from the QR
code below. Alternatively, you can view this video at:
https ://www. voutube. com/watch?v=8H5NmN gB g 1M.

1. Determine the location where the T640 will operate in the
shelter.

a. The instrument should be installed in a location where
the top of the ASC will be no less than two feet from the
top of the ceiling/roof line or,

b. The instrument should be placed at a height within the
shelter so that after the ASC and 8' extension sample
line are installed, the inlet (on top of the 8' extension
sample line) is 2-m above the roof and equal height with
any other PM instrument inlets.

c. Align all pieces before making any cuts in the roof.

d. Ensure the monitor downtube is capped so that no debris
enters the downtube during drilling and installation.

2. Drill a hole in the roof to accommodate the diameter of the 8' extension sample line
(5/8" OD).

3. Install the provided roof flange over the hole.

a. Make sure to use good quality roof sealant for the base of the roof flange to
ensure weather tightness and to prevent any leaks into the shelter.

4. Without locking it down, setup the sample line tripod so that its sample line hole aligns
with the hole in the roof.

T640 Rooftop
Installation
Video

• • •

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May 10"', 2019

a. The tripod should be setup at such a height to properly support the sample line
with the inlet on top.

5. Without the inlet installed on the top of the ASC, line up the instrument so that the
opening at the top of the ASC is in-line with the sample line hole/roof flange on the
shelter roof.

6. Install the slip coupler on top of the ASC.

7. Slide the 8" sample line extension down through the tripod and the roof penetration until
it meets the opening of the slip coupler.

a. The sample line should be plumb to prevent any strain on the instrument and to
prevent pneumatic leaks.

b. The sample line should slide into the top of the slip coupler and bottom out when
in completely. Ensure that the sample line is not pushing down on the connection
inside the slip coupler such that the monitor can be moved to the side, as needed,
for verifications and audits.

8. Lightly tighten the tripod cord grip and the roof flange cord grip around the sample line
to hold it in place.

9. Test the slip coupler and ensure the monitor can be moved. Move the monitor back to its
original location and re-connect slip coupler.

10. At the top of the sample line (on the roof), place the provided inlet collar so that its top is
3" from the top of the sample line. This is for proper clearance from the base of the inlet
and to prevent any instrument flooding if the inlet were to ever get water inside of it.

11. Lock down the collar once it is determined to be at the proper location 3" from the top of
the sample line.

12. Place the inlet on top of the sample line.

a. Make sure the inlet is secure (i.e., that the collar holding it is not sliding).

b. Proper installation should have the inlet 2-m above the roof.

13. Plug the ASC connector into the proper fitting on the rear panel of the T640.

14. Connect the power cable and ambient temperature sensor at the back of instrument.

15. Before sealing the cord grips, power up the instrument and make sure it is running
properly.

16. Once the T640 instrument is determined to be installed and working properly, tighten up
the roof flange cord grip around the sample line.

17. Apply clear silicone caulk generously around the top end of where the cord grip rubber
grommet meets the sample line to ensure complete sealing from the weather.

a. Silicone caulk seals well and can easily be removed and reapplied if the
instrument needs to be removed for servicing.

18. Tighten the tripod cord grip and lock down the feet of the tripod to fully secure the
sample line.

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May 10"', 2019

9.7 Outdoor Enclosure Installation

1. Install the enclosure in the location where the instrument is to run.

2. Measure the distances and clearances for the location of the T640 monitor and inlet. The
T640 instrument should be installed in the enclosure at a height where the inlet will be at
least 2-m above ground (from ground level to the inlet height). Adjust the shelf as
needed; however, do not actually locate the monitor on the shelf yet.

3. Slide the ASC up through the port of the doghouse by several inches above where the
monitor will sit and tighten the collar over the ASC such that it is held in place, but do
not over-tighten. The ASC must be installed from the inside of the enclosure due to the
power connector on the ASC.

4. Locate the 640 monitor chassis on the shelf of the enclosure.

a. Make sure the black inlet nozzle (Figure 18) and aluminum adapter (Figure 19)
are installed on the optical sensor.

5. Once the T640 is in the enclosure and lined up with the opening on the top of the
enclosure, carefully untighten the collar holding the ASC and slide it down gently until it
inserts into opening of the T640.

a. The ASC should go into the T640 level and plumb, and is in completely when it
is felt to bottom out onto the top of the optical sensor. This can be checked by
lowering the front panel of the T640 and making sure the base of the ASC is
touching the top of the optical sensor flush.

6. Plug the ASC connector into the proper fitting on the rear panel of the T640.

7. Connect the power cable and ambient temperature sensor at the back of instrument.

8. Before sealing the collar, power up the instrument and make sure it is running properly

9. Once the T640 instrument is determined to be installed and working properly, tighten up
the collar around the ASC.

10. Apply clear silicone caulk generously around the top end of where the collar rubber
grommet meets the ASC to ensure complete sealing from the weather.

a. Silicone caulk seals well and can easily be removed and reapplied if the
instrument needs to be removed for servicing.

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May 10th, 2019

9.8 Pneumatics

T640 Inlet	"T~T

(standard, 5 LPM)

ASC
Heatci

T640 Chassis

— c
ro o

11

C E

<3

Exhaust •

5-lpm

Pump
PU98

T640
Inlet

5 • Ipm

ASC
Heater

Particle
Sensor

Pulsation



Flow



DFU



RH/T

Dampener



Meter





Sensor

Figure 24. T640 Pneumatics.

9.9 Instrument Start-up

With all hardware and electrical in place, power-up the T640. The monitor will take a few
minutes to work through its start-up routine. Ensure the data system is not logging data at this
point, except as necessary to ensure data transfer is appropriately bringing in information from
the T640. The following activities should be performed after the unit is brought on line: Note:
references to the User manual are provided, where applicable.

1.	Check the firmware; upgrade firmware to latest version, if necessary. (See Section 3.2.6
of T640 User Manual).

2.	Adjust the clock on the T640 to local standard time (LST). (See Section 3.2.12.2 of T640
User Manual).

3.	Select parameters to display on front panel home screen. (See Section 3.2.11 of T640
User Manual).

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May 10"', 2019

a.	To select parameters, press the configuration button:

b.	Users can select whichever parameters are most important to them. Our
provisional recommendation is to include:

i.	Sample Flow (5.0 lpm)

ii.	Ambient Temp

iii.	Sample RH:

4.	Select parameters to include in "dashboard." See "Monthly QC and Maintenance Sheet"
in section 10.0 below for recommended parameters to include. (See Section 3.2.9 of the
T640 User Manual to configure dashboard).

5.	It is recommended to use units of mm Hg for pressure. To change pressure units to mm
Hg, go to Setup >Vars >Pressure Units >mmHg.

6.	Select LED temperature and track its stability in a trend chart. Once stable move to next
step.

7.	Conduct Instrument Verifications and Calibrations (Section 6.4 of this SOP)

8.	Inspect the Disposable Filter Units (DFUs) to ensure they appear new. Label as "new"
with today's date using a sharpie.

9.	Close-up instrument front panel and inspect all connections.

10.	Wait ten minutes, which allows concentration data to be updated to ambient conditions.

11.	Review the concentration data on front panel display and ensure all parameters appear
reasonable compared to current conditions. Compare T640 data to other available data at
current site or nearby site, if available.

12.	Enable data recording to "On Scan."

13.	Document the instrument's startup in Field log book.

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May 10"', 2019

10.0 MONTHLY QC AND MAINTENANCE SHEET

Order of Monthly Checks:

Station:



1.	Document any alarms and then clear.

2.	Record parameters as found from Dashboard.

3.	Take instrument "Off Scan" from data system

4.	Perform zero test

5.	Perform verifications of:

a.	BP

b.	Ta

c.	Sample flow(5.0 1pm)

d.	Span Dust (performed quarterly)

6.	Perform, only if needed calibrations of pressure, flow, and PMT.

7.	Put instrument back together.

8.	Clear any remaining alarms

9.	Wait minimum of 10 minutes to ensure PM concentrations are
representative of ambient air.

10.	Record "After" parameters from Dashboard in far-right column.

11.	Bring instrument back on line to data system.

Operator:



Analyzer S/N:



Date:



Time monitor out of
service (LST):



Time monitor back in
service (LST):



Any alarms enabled?
List alarm/date/time if
applicable



Parameters from Dashboard:

I s found / After

Amb P. (mm Hg)



PMT Setting



Current PMT hv





Amb T. (°C)



BoxT. (°C)



LED Temp. (°C)





l'\ b - Cone. ('Lig m:l i



ASC Heater Duty



Pump PWM (° b)





PMio Cone, (gg/m3)



Sample Temp. (°C)



Sample Flow (1pm)





Package Version



Sample RH (° o)



Valve PWM (° b)













Total Flow (1pm)





Monthly QC Checks:

Audit Device:



S/N:



Last Cert. Date:



QC Check

Verifications:

Calibrations:

Tolerance

Audit Actual

T640x

Audit Actual

T640x

Zero Test

NA



Re-zero if any issues found and corrected:

0.0 on each PM metric

BP









+/- 10 mm Hg

Ta







+/- 2°C

Sample Flow
5.0 1pm









+/-5°b of T640x (e.g., 4.75 -
5.25 1pm)

Additional Checks and Maintenance (longer than monthly):

Date Completed

Quarterly

Span Dust™

(+/- 0.5 value

on Span
Dust™ bottle)

Peak Ch. =
PMT Setting =
Peak Ch. Counts =





















Inlet

1. Clean PM Inlet



Every 6 Months

1.	Clean Optical Chamber

2.	Clean RH Sensor

3.	Clean Ta Sensor



Every 12 months

or if valve or pump PWM value
approaches 80%

1.	New internal (5.0 1pm) Disposable Filter LTnit (DFLT) [inside front panel]

2.	New external (11.67 1pm) Disposable Filter LTnit (DFU) [at back of
instrumenfl; It is recommended to change both DFLTs on the same day.





44

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