-------
APPENDIX D
O.V.A. CALIBRATION CURVE CHARTS
-------
10,000
8.000
6,000
4.000
^ 2.000
a.
CL
CD
1 —
ji i.ooo
u 800
o
" 600
«t
0
Sf 400
200
too
OVA 1400 C3 CALIBRATION CURVE
/
'
j
~if
/
/
/
/
/
/
/
/
/
'
0 10 20 30 40 50 fin 70 80 90 100
RESPONSE (% OF CHART)
tn
-------
10.000
B.OOO
6.000
4.000
E
£ 2.000
z:
0
i —
••x:
oc
S |.°o°
C_3
o 800
z 600
•*s
o_
O
cc
Q_
400
200
100
OVA 1410 C3 CALIBRATION CURVE
/
/
'
j
y^
y
f
/
/
/
/
'
/
•
9 10 20 30 40 50 60 70 80 90 100
RESPONSE (% OF CHART)
-n
c?
c=
ao
m
t^a
-------
£D
CXI
O
PROPANE CONCENTRATION (ppm)
— K5 *k O5 tt O
— ro *k O) OD O O OOOO
o o oooo o oooo
OVA 1410 C3 CALIBRATION CURVE
/
/
/
/
r
/
/
/
/
3 10 20 30 40 50 60 70 80 90 100
RESPONSE (% OF CHART)
-n
tn
c:
•so
m
CJ
-------
FIGURE 111-4
7.000
6,000
5.000
4.000
3.000
2.000
,000
800
600
500
400
300
200
100
80
60
50
40
30
SOPROPANOL Q.V.A. 1400 CALIBRATION CURVE
20
40 60
RESPONSE (% OF CHART)
80
100
ENGINEERING-SCIENCE
-------
FIGURE Ml-5
7.000
8,000
S.OOO
4,000
3.000
2.000
S 1,000
N^
ae 800
^3
3 800
H-
LLJ
H 400
u
_«
S 20°
100
30
60
40
ETHANOL O.V.A.. 1400 CALIBRATION CURVE
20
z
40 80
RESPONSE (% OF CHART)
80
100
ENGINEERING-SCIENCE
-------
FIGURE 111-6
7,000
6.000
S.OOO
4.000
3.000
2.000
S 1,000
g 800
g 600
h—
ae
UJ
CJ
g 400
ej
— 200
100
80
60
40
30
ACETIC ACID Q.V.A. 1410 CALIBRATION CURVE
20
40 60
RESPONSE (* OF CHART)
80
100
ENGINEERING-SCIENCE
-------
FIGURE 111-7
ETHYL BENZENE O.V.A. 1410 CALIBRATION CURVE
7,000
6,000
3,000
4,000
3.000
2,000
e'
1,000
800
600
400
200
100
80
60
40
20
20
40 60
RESPONSE (% OF CHART)
80
100
ENGINEERING-SCIENCE
-------
APPENDIX E
FORMALDEHYDE GAS CHROMATOGRAPH
CHART REDUCTION
-------
APPENDIX TABLE E-l
FORMALDEHYDE GAS CHROMATOGRAPH
CHART REDUCTION
THERMAL
Formaldehyde
Attn Area ppm i
4 16
4 16.
4 16
1
5000
5 5000
5000
i
i
CONDUCTIVITY
Water
Attn Area
4 7.0
4 7.5
4 7.5
CALIBRATION
:|
ppm |
5000
5000 :
5000
Methanol
Attn Area
4 14
4 14
4 13.5
ppm
5000
5000
5000
APPENDIX TABLE E-2
FORMALDEHYDE GAS
CHROMATOGRAPH
CHART REDUCTION
1 Formaldehyde
Date Time
4/26/78 1300
1345
1445
1500
1600
1730
Attn Area
i
i 4 42.0
! 4 42.0
4 41.0
4 42.0
; 4 41.0
4 42.0
1800 4 41.5
i
2000 : 4 A 3.0
2030
2045
4/27/78 1230
1300
1330
1400
1430
1500
1530
•' 4 42.0
' 4 42.0
4 45.0
. 4 48.0
4 49.0
1 4 44 . 0
' 4 43.0
4 48.0
4 45.0
ppm
13000
13000
13000
13000
13000
13000
13000
13000
13000
13000
14000
14000
14000
14000
Water
Attn Area
4
4
4
4
4
4
4
4
4
4
4
4
i
4
i
4
13000 4
14000 4
14000 4
103
103
100
96
105
92
90
77
95
95
112
107
105
108
110
103
108
:i
ppm :
i
70000
70000 :
68000 ,
66000 ;
72000
63000
62000 :
53000 ;
65000 i
65000
77000
73000
72000
74000
Methanol
Attn Area
1
1
1
^
1
1
1
1
l'
1
1
1
1
75000 . 1
70000 1
74000 1
5.0
5.0
4.5
4.5
6.0
6.0
4.5
3.5
4.0
4.5
6.0
5.0
4.5
5.0
6.0
4.0
5.0
ppm
450
450
410
410
540
540
410
320
360
410
540
450
410
450
540
360
450
-------
APPENDIX F
EQUIPMENT USED FOR TESTING
-------
APPENDIX TABLE F-l
EQUIPMENT USED FOR TESTING
Description
Pump
Pump
Dilution System
Recorder
Magnahelic
Digital Temperature
Indicator
Manufacturer Model
Cast Mfg. Corp. DOA-104-AA
Thomas Industries, Inc. 107C Series
(Built by ES)
Linear Instruments N/A
Corp.
Dwyer Instruments Cat.tf 2310
Omega Engineering 175
Comments
Used to pull sample from
source. One pump was also
required to pull dilution
system air.
No integrator.
0-5" H20
Ten channel digital read-
out.
Positive Displacement
Gas Meter (Roots)
Dresser Industries, Inc. Ilml25
125 PSIG - 11,000 CFll Max
310 M3/H - 860 KPA
Four inch flanges, 10-1/2"
between flanges.
Turbine Gas Meter
(Singer)
American Meter Div.
AL-425
425 CFH <§ 1/2" Diff.
900 CFH @ 2" Diff.
M.A.O.P-10 PSI
-------
BASIC TEST EQUIPMENT CONFIGURATION
SAMPLE RETURN LINE
SAMPLING MANIFOLD
BLIND FLANGE
MAGNAHELIX
PRESSURE GAGE
STRIP
CHART -,
RECORDER /
HEATED LINE
REOSTAT~7
FIXED ROOF TANK
EXPLOSION PROOF PUMP
HYDROGEN
ORGANIC VAPOR ANALYZER
DILUTION SYSTEM
-------
-------
WARRANTY
OMEGA warrants this unit to be free of defects in materials and work-
manship and to give satisfactory service for a period of 1 year. If the
unit should malfunction, it must be returned to the factory for evalu-
ation. Our Customer Service Department will issue an Authorized
Return Number immediately upon phone or written request. Upon
examination by OMEGA, if the unit is found to be defective, it will be
repaired or replaced at no charge. However, this WARRANTY is VOID
if the unit shows evidence of having been opened or tampered with,
shows evidence of being damaged as a result of excessive current,
heat/moisture, vibration or misuse. OMEGA assumes no consequential
warranties or obligations beyond repair or replacement of the above unit.
OMEGA ENGINEERING INC.
(IMMMMMM^
OMEGA ENGINEERING, INC.
P.O. BOX 4047, STAMFORD. CONNECTICUT 06907
PHONE (203) 359-1660
TELEX 996404
The maienai in ihis manual is COPYRIGHTED and is presented here wiih ihe
authors permission. No material in this book may be reproduced witnoui written
permission.
SECTION l
l.l
i 2
.2.1
.2.2
.2.3
.2.4
.2.5
.2.6
.2.7
.2.8
SECTION 3
3.1
3.2
3.2.1
3.2.2
3.2.3
3.3
3.3.1
3.3.2
3.4
3.5
SECTION 5
5.1
5.2
MODEL 175
DIGITAL PYROMETER
OWNERS MANUAL
TABLE OF CONTESTS
CERTIFICATION ANU IIAKKA.MV
INITIAL CHECKOUT PROCEDURE
DESCRIPTION
General
Specifications
Input
Accuracy
Conversion
Display
Digital Signals
Power
Central
Ranges
RECEIVING AND INSTALLATION
Unpacking and Inspection
Mechanical Installation
OPERATING INSTRUCTIONS
fin Assignments
Powe r
Input Voltage
Input Fu&e
Output Voltage
Signal Input
Signal
Ground Precautions
Digital Signal Outputs
Digital Signal Inputs
ADJUSTMENT AND CALIBRATION
Outline and Mounting
OPTIONS
Analog Output (Option 05)
Digital Controller (Option 06)
Primed in U.S.A.
©OMEGA ENGINEERING. INC.
-------
CERTIFICATION
INITIAL CHECKOUT PROCEDURE
OMtCA e.SuINCEKlNC. IXC., certifies chat this instrument was throughly in-
spected and tested at the factory prior to shipment and found to luet all
requlreoents defined by the contract under which they arc furnished.
Warranty and Assistance
OM£CA warrants this unit to be tree of defects in Materials and workmanship
and to <;ive satisfactory service for a period or 1 year. If the unit should
calfunction, it East be returned to the factory for evaluation. Our Customer
Service Department will issue an Authorized Return Number immediately upon
phone or written request. Upon examination by GlIECA. if the unit is found to
be defective, it will be repaired or replaced at no charge. However, this
UAKKAim is VOIu if the unit shows evidence of having been tampered with.
shows evidence of bein^ damaged us a result of excessive current, heat mois-
ture, vibration or cisuse. U!t£CA assumes no consequential warranties or
Obligations beyond repair or replacement of the above unit.
In all orders for service, please include a description of the failure and a
diagram ot the test conditions that will allow the factory to reproduce the
failure syaptoms.
See Section 2.1 for Unpacking and Inspection Instructions.
CAUTION
Meters art Internally connected for either 115V
or 230V AC power, or 5V DC power. Check label
on meter for proper supply voltage.
REQUIRED EQUIPMENT
1. 115V or 230V 50-60 Hz power source (4.3 watts), or
5V DC at 750.T.A.
2. Three wire AC power cord, or a two wire DC power cord.
3. Flat blade screwdriver (1/4" blade).
4. Piece of copper buss wire.
5. 100 Ohm resistor.
TEST EQUIPMENT
1. Connect AC power as follows:
a. AC power HI (Blk) to TB1-1.
b. AC power LO (Uht) to TB1-2.
c. AC power CND (Crn) to TBl-3.
2. Connect DC power as follows:
a. +5V DC to TB1-2.
b. 5V DC Return to TBl-3.
3. For Thertoocouple Meters connect a piece of copper wire
between TBl-5 and TB1-6.
4. Apply power and examine the display. The readout should
show the approximate ambient temperature in °C or °F as
applicable.
5. For RTD meters connect a 100 Ohm resistor between TBl-5
and TB1-6. Then connect a piece of copper wire between
TBl-4.and TBl-5.
6. Apply power and examine the display. The readout should
show approximately zero.
-2-
-3-
-------
o
B
e
8 it I
-4-
SECTIOH 1
DESCRIPTION
1.1 General
Dual slope Integration with automatic zero correction
Is universally accepted as the most accurate method
of analog to digital conversion. In the Model 175
this technique is further enhanced by the untillzation
of low noise Input components to maintain noise levels
below the resolution or the thermometer. Accuracy
near the reference temperature of each range Is not
degraded by normal mode noise because the 175 perfoncs
true bipolar signal Integration around zero. Many
competitive meters rectify the signal before intergra-
tlon which erroneously adds the absolute value of
the normal oode noise to the signal reading. The 175
average value circuit provides full normal mode and
superior AC line transient noise rejection at all
signal levels.
An Inherent feature of dual slope integration is the
automatic rejection of AC Una noise on the signal
If the signal integration period Is equal to a multiple
of the AC line period. In the Halt with prcclsly
equal periods the AC line noise rejection is Infinite.
The Model 175 uses an accurate and stable oscillator
which limits the instability of the signal measuring
interval to within i;!X and provides 30 dB of normal
mode rejection. An'input filter provides an additional
30 dB of normal mode rejection. Overall, normal oode
rejection is the sua of these two numbers of 60 dB.
Noble metal and some base metal thermocouples are
described by the expression eof - AT + BT? in which
cicf is the output voltage, T is the temperature stim-
ulus, and A and B are constants. Over the full range
a thermocouple output can be divided into two or three
intervals that are each described by an &nf expression
with different values for the constants. It should be
noted that the two terms of the emf expression are the
first terms of the series expansion of Ln(l-X). By
utilizing Ln(l-X) functions to fit the thermocouple
characteristic in the two or three Intervals, the
resulting conformity error is less than the thermo-
couple limits of error. OMEGA'S POUYLGC llnctrizer
(patent applied for) is equal in perforoance to 16 to
20 segment digital or diode function generator llnear-
Izer but without the drift and complexity problems of
Cha diode function generator.
-5-
-------
1.1 (Continued)
A platinum RTD la described by the expression
RT - Ro(l + CT - DT2) In which RT Is the resistance
at a given tcnperature, RO is the resistance at 0 °C,
T Is the temperature stimulus, and C and D are con-
stants. By subtracting the Rp term (offset) from the
R-r expression one is left with two terms that are the
first two terms of the scries expansion of Ln(l + X).
By utilizing one of at the moat two Ln(l + X) functions
to describe the Pt RTD over Its entire range the result-
ing conforaity error is less than 0.2%. OMEGA'S
POLYLOG llneatizer (patent applied for) in this case
is equal In performance to a 64 segment digital llnear-
Izer.
-6-
1.2
Specification*
1.2.1 Input
Configuration Single-Ended
Polarity Bipolar with Polarity
Indicator
Zero Automatic with negligible
long term drift. Thermal
emf's from Input terminals,
signal conditioning and
basic meter Is less than
0.15uV/°C.
Full Scale Voltage 20mV to 200mV
Overvoltage Protection .. 130V RMS for TC or 6Vp
for RTD without damage
Impedance 100 Megohm
Bias Current 1 Nanoamp
Sensor Break Detection .. 60 Nanoamps current source
with positive Overload
Indication
Lead Resistance 250 Ohms max for rated TC
accuracy.
Add 0.005% R per Oho of
RTD conductor resistance
to overall RTD accuracy.
NMR @ SO/60 Hz 60dB .
CMR with 250 Ohm
Imbalance 120dB AC power to Signal
low. 120dB (opt) Digital
Cnd to Signal low.
CMV (DC to 60 Hz) 500 volts peak.
-7-
-------
1.2.2 Signal Conditioning
Reference Junction
From 10-40 C ambient.
for base
metals and 0,05 deg/de
0.03 dcg/dee for base
metals and 0,05 deg/deg
for noble metals with I
dej> resolution. Sensor
offset adjusted to zero
from front panel.
Fron 10-40 C ambient, 0.02
deg/deg for platinum with
1.0 deg resolution. Sensor
offset adjusted to zero
from front panel.
1.2.3 Conversion
Technique
TC Dual Slope, Average value
RTD Dual Slope ratlometrlc,
average value
Signal Integration 100 milliseconds
Reading Rate Int. 3/4see, Ext. 0 to
3-4/sec.
Linearization POLYLOG (patent applied
for)
1.2.4 Display
Type 13mm, 7 segment LCD
Symbols 0.0.0 to -1.9.9.9
Decimal Points Any of Three
Overload 3 Least Significant Digits
Flash.
1.2.5 Digital Signal*
Logical '0' 0 to .6V (Input)
0 to .4V (Output)
Logical '!' 2.0 to 5.5V (Input)
2.4 to 5.5V (Output)
1 Unit Load Logical '0' 1.6mA
Logical '!' .04mA
Hold '0' - Hold data
Input load - 1 Unit load
Data Ready '0* - Valid data
Output drive - 3 Unit loads
BCD Parallel Data '!' -True
Output drive - 3 Unit loads
+ Polarity '!' -Positive
Output drive - 1 Unit load
Overload 'I1 - Overload - 3 Unit loads
1.2.6 Power
Input Voltage 115V +101 50/60 Hi
230V T10Z 50/60 Hz Option 01
100V +10Z 50/60 Hz Option 02
5VDC J5Z 7SOxA Option 03
Input Power 4.5 watts at nominal Input
Output Voltage +5V @ 100mA without options
-9-
-------
1.2.7 General
Operating Temperature 0°C to 40°C
Storage Temperature -40°C to 70°C
Humidity Up to 95* at 40°C
Weight 540g or 1.2 Ib.
Case Material ABS KJB
Case Size
Bezel (U x H x T) (96 x 40 x 6)am on
(3.78 x 1.89 x 0.24) In.
Depth Behind Bezel
Ulth Connector 135.4mm or 5.33 In.
Panel Coutout (W x U)... (92 x 45)mm or
(3.62 x 1.77) In.
Corjiectors Barrier Strip, Signal
and Power. 36 Pin
connector* BCD output
36 Pin connector, options
(Viking VK 180/12.
SAE DAC 180/1-2,
Winchester HSD 18SO)
-10-
1.2.8 Ranges
TEMPERATURE SENSOR HANGES 4 ACCURACY 41 23'C
tCKiOJi
!»»(
t
*
M(Q
MAUfUAt
*»"
C«>
Coae«-
O».i*iif
CIWOMM
CO«*I*M«A
rixiMiB
tOO OhM
AAMCI
. trg ie V
D" to JH-
• 100 t» U
U- W *»•
ijo- M>*V
• IM' 0 0-
0* 10 «»•
««• »•,•*«•
-Il4- 13 «•
M • icvtrw-
• >M- ti tjC'
- ]&)• '« TM
- iW o 0
o- to vc
Hi- <-. t»r
- »j-* o W
-H'j'Cia 0'
o-Cto 'ac-
- r»tpf iu ;i-
»;•» M i-r
conroRMiir
IMOA
1 t4*C
*t fC
i 1C'*
• ?c-*
>•'. H(j.m4
tJO C
1 1 r-c
)«'. K-^MO
1 1 •'»•*
'IC'f
t J rC
! :•'«
:.'J C
, * ?i-c
J«'. o*,»-;
9 10'*
tl***
;a; c
iO."C
: J ; *
tC )•*
OVilULL IM1KM
• 'i ISO
«tfC
it*-C
» Ji'»
.!»•>
It'. »»*J.i3
ril'C
.!>••:
!••. «**«J-^
i ) :%•»
t if*
• l«'C
i • i •
- Jl'C
» - .•••:
4S'. '•..jnj
1 »>•'
t iC'«
. ; ;-f_
-.o:-C
_-,
I -jf*
•ItOlUI'ON
10-C
!»••
lO'C
•0-C
I0'«
• c-c
tQ'f
lO'C
iO*»
MOOtL
JC<
jr*
»**
Conformity errors are with respect to thermocouple reference
tables based on the IPTS-68 and DIN 43760, September 1968.
for platlnun RTD.
Overall error Includes all error sources (basic meter,
signal conditioner, llnearizer conformity, etc.) @ 25°C.
Long Tera Stability 0.15Z error/yr
-11-
-------
SECTION 2
RECEIVING AND INSTALLATION
2.1 Unpacking and Inspection
Your Model 175 was fully Inspected and tested. Chen
carefully packed before shipment. Unpack Che meter
carefully and Inspect It for obvious shipping damage.
2.2
Mecha
illation
The Outline and Mounting drawing on the last page
Illustrates the mounting method for your digital
pyroneter. The unit Is Inseted from the front of
the panel and held In place by two slide retainers.
The panel thickness may be between . 75tnm (.030") and
6.35mm (.25").
-12-
SECTION 3
OPERATING INSTRUCTIONS
3.1
3.1.1
Fin Assignment!
Connector TB1
POWER
AC OPERATION 5 DC OPERATION
AC Power HI N/C
AC Power LO +5 Volts
AC Power CUD 5V Return
FUNCTION
TBl-PIN TC OPERATION RTD
4 AC Guard Shield
5 TC (-) Input
6 TC (+) Input
J5
TB1
Jl
OPTION BOARD
HAIN BOARD
REAR VIEW OF UNIT
Figure 2
-13-
-------
3.1.2
Connector Jl
J1-P1N
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
13
FUNCTION
No Connection
Spare
No Connection
Blank
COMP
SIC
Clock
80 Bit
40 Bit
20 Bit
10 Bit
IK Bit
Spare
Spare
+5V
Signal Gnd
Signal In
OL
Connector Type Viking
X— Key
1
|
Jl-PIN
A
B
C
D
E
F
H
J
K
L
M
N
t
R
S
T
U
V
FUNCTION
Spare
No Connection
Spare
1 Bit
2 Bit
4 Bit
8 Bit
100 Bit
200 Bit
400 B1C
800 Bit
1- Polarity
Data Ready
Hold
Ext OL (In)
Digital Cnd
Conv
RF.F
Viking VK18D/12
SAE SAC18D/12
Winchester HSD18SO
18
__
Figure 3
Connector Pin Orientation ns Viewed
From the Rear of the Meter.
-14-
3.2 Power
1.2.1 Input Voltage
The standard meter operates from 115V +1
60 He. 1C consumes about 4.1 watts. A three wire
connection should be used to connect power to the meter.
Tvo conductors provide pover and the third provides a.
ground for noise rejection.
Option 01 Is 230V +107., 50 He operation. To change the
meter In the flold7 from 115 to 230V operation, use the
following procedure. See Figure 3
(1) Remove power lines from meter and remove the
meter form the case.
(2) Remove the two jumpers on the transformer Ul
and U2.
(3) Add jumper W3 on the printed circuit board.
The meter Is now wired for 230V.
To change the meter from 230V to 115V operation, reverse
the above steps.
3.2.2 Input Fuse
The power Input Co the Model '75 Is protected by a
carbon composition resistor fuse. If the meter c*oea
not light and It is suspected that the fuse has been
blown, check the continuity of the primary circuit.
The resistance from power HI to power Lo will be
approximately 180 ohms for 115V meter and 700 ohms
for the 230V meter. If the fuse Is blown. It Is
Imperative that It Is replaced by an Identical pare,
failure Co do so will void the warranty. The fuse
Is an Allen-Bradley 1/8U 10 ohm, +10% carbon
composition resistor OMEGA pare nuxber 8111109.
3.2.3 Output Voltage
The +5V output la a regulated supply 'with the voltage
range 4.5V Co 5.1V. A maximum current of 100mA Is
available for external use.
-15-
-------
3.3 Signal Input
3.3.1 Signal
For beat results a shielded thermocouple should be used
for the Input signal, with the shield terminated to
Signal Ground at the connector TBl-4.
Signal Ground end Digital Ground are Internally connected
and should not be connected externally.
3.3.2 Ground Precautions
All Digital Signals used should be returned to Digital
Ground Pin T.
Analog Ground Pin 16 or TBl-4 may be used for a shielded
thenrocouplc or RTD cable IF SHIELD IS NOT RETURNED TO
DIGITAL GROUND AT AMY PODJT.
-16-
3.4 Digital Signal Outputs
3.4.1 BCD Parallel
All BCD outputs are TTL and DTL compatible.
Logical '!' 2.4 to S.1V. source 0.12mA
Logical '0* 0 to 0.4V, sink 4.8mA
The data outputs are parallel BCD. The outputs are
stable and valid while Data Ready (pin P) Is low.
3.4.2
+ Polarity
Logical '!'
Logical '0'
2.4 to S.lV. source 0.08mA
0 to 0.4V. sink 1.6mA
The -I- Polarity output Is a logical '!'
Indicates a positive reading.
when the meter
3.4.3
Data Ready
Logical '!'
Logical '0'
2.4 to S.lV, source 0.12mA
0 to 0.4V, sink 4.8mA
Data Ready will go to a logical '0* at the end of a
conversion cycle and to a logical '!' at the beginning
of a conversion cycle.
3.4.4
Overload
Logical '!'
Logical '0'
2.4 to S.lV, source 0.12mA
0 to 0.4V, sink 4.8mA
Overload will go to a logical '!' If the display Is
equal to or greater than the Internal overload set
point or when Pin S Ext. OL In Is forced low by
external command. It Is stable while Data Ready Is
low. The Overload bit will reset during each
conversion cycle.
-17-
-------
3.4.5
3.A.6
3.4.7
3.4.8
Conv.
Logical '!' 2.4 Co 5.IV. source 0.32mA
Logical '0' 0 to 0.4V. sink 6.4mA
Conv. will go to a logical 'O1 at the beginning of a
conversion cycle and to a logical 'I1 at the end of
a conversion cycle.
Clock
Logical '!' 2.4 to 5.1V. source 0.12mA
Logical '0' 0 to 0.4V. sink 4.8mA
Clock Is factory set at 20KJIz +17.. It la available
during the conversion cycle ana1 If gated off with (SIC)
signal tlrae it can be used as a serial BCD output.
SIC
Logical '!' 2.4 to 5.1V source 0.12oA
Logical '0' 0 to 0.4, sink 4.8mA
SIC will go to a logical '!' at the beginning of
signal integrated and will go to logical '0* at the
end of signal Integrate.
Logical '!' 2.4 to 5.1V, source 0.12mA
Logical 'O1 0 to 0.4V, sink 4.8mA
REF will go to a logical '!' at the beginning of
reference Integrate and will go to logical '0' at
the end of reference integrate.
-18-
3.5
3.5.1
Digital Signal Inputs
Hold
Logical '!' 2.0V, source 0.16mA
Logical '0* 0.8V, sink 3.2mA
When a logical '0' Is applied to the Hold input, the
meter will finish the conversion cycle ic is on and
will hold that reading. If it Is applied before the
beginning of a conversion, the meter will no t start
that conversion. Upon a logical '!' at the Hold
Input, a new conversion will begin within 360msec.
3.5.2
2.7V, source .040mA
0.4V, sink 1.2mA
When a external control signal is wired to Pin S and
goes to a logical '0', the three least significant
digits will flash.
3.5.3
Logical 'I1
Logical '0*
2.4V, source 0.12mA
0.4V, sink 3.6mA
When a logical '0' is applied to the Blank input, the
three least significant digits will go blank.
3.5.4
Comp.
Logical 'I1
Logical '0'
1.5V, source 0.0mA
0.8V, sink 4.8mA
3.5.5 Decimal Points
Any of three decljnal points can be lighted by connect-
ing the appropriate jumper with a bridge of solder as
shown in Figure 4.
-19-
-------
SECTION 4
ADJUSTMENT AND CALIBRATION
IP,
4.1 The Model 175 was calibrated aC the factory with a
precision source. Frequent calibration Is not
necessary due to the stability and Internal accuracy
of the meter. All adjustments are sealed except the
zero adjustment which Is accessible with the lens
reravcd.
If calibration Is required, return to the factory for
calibration." Be sure to pack In a shipping container
of sufficient size to allow ample packing material
around unit to prevent damage in shipping.
4.2 Calibration Verification for Thermocouples.
The following procedure should be used to verify the
calibration of thermocouple type meters.
1. Connect test cables as shown in Figure S.
2. Apply power and allow meter to waro up for ten
minutes.
3. Apply zero volts from calibrated voltage source
and verify readout of 000°C or 032°F. Adjust
zero pot If required (See Figure 4 for location).
4. Verify that the 175 is calibrated to the inter-
national practical Temperature Scale, IPTS-63,
as published In NBS Monograph 125 Issued March
1974 or ASTM E230-72 or ASA C96.2-1973.
4.3 Calibration Verification for RTD's
The following procedure should be used to verify the
calibration of RTO type meters.
1. Connect test cables as shown In Figure 6.
2. Apply power and allow oeter to warm up for ten
minutes.
-20-
-21-
-------
4.3
(Continued)
Apply appropriate resistance from the cal-
ibrated resistance source from DIN 43760,
September 1968. This calibration, with an
a - .00385, Is for specially processed
platinum with Improved stability In indust-
rial environments.
NOTE: Reference Paragraphs 4.2 and 4.3 see
Temperature Range and Accuracy Chart
1.2.3.
-22-
MAIN BOARD
THERMOCOUPLE
WIRES
TWIST TOGETHER
AND SOLDER HERE
ICE BATH
Figure 5
-23-
-------
REAR VIEW OF UNIT
OUTLINE AND MOUNTING
J5
TBl
Jl
1
18
1 1
A 1234
© |®|®l<2)|®
i
i-
A
5
®
6 V
©1 ©
18
-1
V
~v
f
MAIN BOARD
NOTE: ALL
^^ THREE WIRES
MUST BE THE
SAME LENGTH
AND CAGE.
PEAR Vltw
(BEZEL NOT S«0»N fM CLAR.tr)
CLAMP RiKos ooiArco i SLICE fiifAihtRS
RtxovtO A3 SHOWN I OK INSTALLATION
NOTC&: DIMENSIONS IN MILLIMETERS!.2suM
AND IN (INCHES);.oi in
DIN CASE
3 WIRE RTD CALIBRATION
Figure 6
-24-
-25-
-------
5.1
5. I .1
Analog Output (Option 05)
This option 18 contained on a second printed circuit
board parallel to the main board. (See Fig. 2, Pg.
13). A precal ibrated linerizcd analog output of _^2
volts maximum capable of driving a 1 MA load ia
available for conventional analog recording and
controlling instruments.
The following connections are required between connec-
tions Jl and J 5 :
a. Jl-C
b. Jl-2
c. J I-T
d. JI-15
e. Jl-U
f. Jl-v
o J5-U
o J5-17
o J5-16
o J5-U
o J5-10
o J5-P
g. Jl-N to J5-S
The analog output is ava
J5-V (Lo).
AC
AC
Digital Ground
»5 Vole s
CONV.
Ref.
• Pol.
liable between J5-18 (Hi) and
NOTE: If connection Jl-N to JS-S is removed, and J5-S
Is juDpered to J 5-U , an absolute value function is
•obtained froo the 05 option.
-26-
5.1.2 Field Calibration Procedure*:
MODEL 175
1. Perform needed cabling between Jl lower connector (meter)
and J 5 (Option Board).
Install a jumper between TBI -4 and TBI -5 (Fig. 1).
Connect a millivolt source to TBI -5 and TBI -6 , and oet
for OHV.
2.
3.
Apply AC power liatd on meter label. (115 VAC or 230
VAC). The analog output should be zero and a cero
reading should be displayed with polarity sign toggling.
Adjust 819 on option board for zero voltage between J5
pin 18 and J 5 pin V if necessary. (Drawing Mo. 06526).
To calibrate positive polarity, open the thermocouple
input and the meter will display its positive overload
set point. (This set point it inter nally programmed and
will vary with range and type of meter.). Adjust R 5
until the analog output in millivolts corresponds to the
flashing displayed reading. (Drawing Ho. 06526).
4. To calibrate the negative polarity of the analog output
option, disconnect power and remove the wire attached to
J5 pin S . Short pin S to pin 16 on J5. Apply power and
adjust K6 until the analog output in millivolts c or r e s~-
ponds to the flashing displayed reading. Ignore dis-
played polarity on meter. (Drawing No. 06526).
5. Disconnect power.
6. Remove ground jumper from J5 pin 5 to pin 16 and re con-
7. Reassemble meter and con
couple at ice point, ad ju at C meters for a toggling
polarity sign. For F meters adjust for a reading of
Ol .5°F (example 31 toggling 32). Zero Pot • R 46 Shown
o n Pg. 20 f igu re 4.
nect thermocouple. With thermo-
ice point, ad ju at C
-27-
-------
5.2 DIGITAL CONTROLLER (Option 06)
SPECIFICATIONS
Power Required: 5V @ 6OHA f ron baaic me te r.
Accuracy of Switching Point; Same as basic
Outputs :
tin. t»& .„-.... _ eter,
FORM C relay contact rated @ 2 AMPS 28 VDC
or 1 AMP @ 115 VAC
ALARM - 1 TTL load.
j^POLARlTV - 1 TTL load.
OL/Teut - 5 TTL loads
Hi ALARM - 2 TTL loads
Lo ALARM - 2 TTL loads
RESET - 2 TTL loads
O Volts 0 60 MA
12 BCD BITS * 1 TTL load
POLARITY - 2 TTL loads
EXTERNAL RELAY CONTROL - 1 TTL load
EXTERNAL RESET - 2 TTL loads
ALARM ZONE - 2 TTL loads
LATCH - 2 TTL loads
COMP - 1 TTL load
II. Description,
The 06 option is a two state digital controller or
alarm which accepts up to 4 digits of BCD with polarity.
Its outputs are a Form C relay, a TTL output, and a
front panel L.E.D. which flashca when the meter is
reading in the alarm zone. (The alarm zone can be
above or below any selected point.) The controller
outputs go true whenever the meter reading is in the
For alarm applications,
the outputs may be set to latch true whenever the router
though the meter reading has returned to the operating
zone. It raa y be reset either externally or by pressing
the front panel button.
is true.
The
The TTL alarm output is III when the al
Form C relay contacts can be true when the alarm is
true or can be externally controlled. The front panel
L. H. D flashes when the alarm is true. It can be mad*;
to go on continuously or inhibited altogether. Press-
ing the front panel button causes the switching point
to be displayed on the meter, and resets the alarm if
latching operation is being used. It also inhi-
bits the alarm output for about 1 second after the
button has been released.
-26-
(Jl is the bottom connector on the Model 175 or 2)0; J5
is the upper connector on the aeter, used to make all
connections to the 05/06 option.) See Pg. 13, Pig.
2.
WARJ* INC ; Disconnect A.C. powg r from meter before doj n g
any w i_r_i njj I
A. The
for
,_
2.
3.
4.
5.
6.
7.
1 o I 1 ow i ng
proper ope
(•5V)*
(CUD)'
(REF)*
(CONV)*
(SIC)
(OL)
(COMP)
connectio
ration of
J5-U
J5-I6
J5-P
J5-IO
J5-I2
J5-R
J5-I3
ns
an
mu ac be peraa
06 option:
JI-15
Jl-T.
Jl-V
JI-U
Jl-6
JI-S
JI-*
nently wired
* Required either OS or 06 or Both.
B. The following connections vary according to your
application:
I. Switching Point: Those 3CD Bits which are Hi
(Positive true logic) for the desired switching
point must be wired to any of the following
Pins on J5: 1. A. 2. B, 3, C. 4, D, 5, E, 6 or
7.
A. Wire length mu st be kept under 6 inches for
proper meter operation. (See D below).
B. For example; A switching point of 673
requires connecting the 800, 40, 20, 10, 2
and I Bits. All other BCD Bits on J5
should be left open, or connected to J 5 Pin
U through a single 1 OK resistor.
C. For applications where the operator must
change the switching poing. an external BCD
thumbwheel switch can be connected between
the BCD outputs and the controller inputs.
D. If wire lengths greater than 6 inches total
are needed, a 100 Ohms, 1/8 Watt resistor
may be used at Jl in series with each BCD
Bit.
-29-
-------
5.2
cont inued
C. TABLE - FIN ASSIGNMENTS FOR 0} AND 06 OPTIONS - CONNECTOR Ji
Fu nc t ion
BCD
BCD
BCD
BCD
BCD
I npu t
Input
Input
I npu t
Input
-Pol Output
Pol Bit In
Relay Common
Re lay N.C.
Latch
Alarm to ne
Alarm Output
Re f 1nput* *
OT/ Test
•Pol In
Ext Relay Control
• 5 Bolts Power In**
Pin
A
B
C
D
I
r
H
j
K
L
H
N
P
Analog Output (L0>* V
•05 Only
••05 and 06
Fu nc t ion
BCD
BCD
BCD
BCD
BCD
BCD
npu
npu
npu
npu
npu
Hi Pulie
Relay N.O.
Conv**
LowPulae
Signal
Comp.
ACV for 0)*
Re set
Power CNO**
ACV For 05*
Pin
I
2
3
4
5
6
7
a
9
10
11
12
13
13
16
17
Analog Output (HI)* 18
IV Polarity:
A. For a poaitive polarity switching point connect J5
pin S and J5 pin H to Jl pin N.
B. For a negative polarity switching point, jumper J5
pin H to J5 pin f. Also connect J5 pin S to Jl pin
N.
C. For a switching point which ignores polarity (abso-
lute value) connect J5 pin H to J5 pin U. (If your
meter has an 05 option also; connecting J5 pin H to
Jl pin N will allow the 05 to function with normal
polarity, while the 06 functions with absolute
value. )
V Alarm Zone:
A. For a HI alarm zone: (The alarm is true for all
meter readings equal to or greater than the switch-
ing point.) Connect J5 pin N (ALARM ZONE) to J5 pin
B (111).
B. For a LO alarm tone: (The alarm is true for alt
meter readings less than the switching point.)
Connect J5 pin H (alarm zone) to J5 pin 11 (LO).
VI Latch:
A. LATCHING OPERATION:
If it is desirable for an alarm condition to remain
true after the meter reading has returned from the
alarm zone to the operating zone; connect J5 pin L
(Latch) to J5 pin IS (Reset). This provides a reset
Croa the front panel button. Thia reset lasts about
1 second after the button is released. The neter
nay be reset externally by connecting J 5 pin L
momentarily to ground (I TTL load) (A 27K pull up
to «5V is necessary and is provided internally at J5
pin 15).
B. CONTROLLER OPERATION:
If it is desirable that the alarm reset as soon as
the meter reading returns from the alarm zone to the
operating zone; Bake the connection specified
be 1 ow:
I. If the alara zone is HI; connect J5 pin L
(Latch) to J5 pin I I (Lo).
2. If the alarm zone is LO; connect J S pin L
(Latch) to J5 pin 8 (Hi).
-30-
-31-
-------
5.2
c on C i Hue d
•VI I OUTPUTS:
A. L.E.D.
i s
on che front panel will flash when Che a 1 am
are required. If ic ii
desirable that che front panel L.E.D. not flash when
che alarm is true, cue Che wire from J 5 pin 12 to Jl
pin 6. This will cause the L.E.D. simply Co go on
in an alarm true state. The L.E.D. nay be inhibited
entirely by connecting J 5 pin 12 Co J 5 pin 16
(Jl pin 6 must be left open if this ia done).
B. The alarm output ( J 5 pin N) can source 1.5 TTL loads
or sink 9.9 TTL loads. It is HI when Che alarm is
true. (If additional source capability is desired.
a 3,3 K pull up can be added to J 5 pin 15. This will
allow the alarm output to source or sink 9 TTL
loads . )
C. The relay (Form C contacts) ia driven through J 5 pin
T (C' 1 TTL load): Co use the relay as an a I area
indicator or to controller; connect J5 pin T to J 5
pin N.
1. J5 pin J is connected to J 5 pin 9 when che alarm
is true (J5 pin T HI ).
2. J5 pin J is connected to J5 pin K when the alarm
is false.
3. The relay contacts are rated at 2 amps, 28 volts
D.C. or I amp, at 115 volts A.C.
4 . Care must be taken when using the relay co avoid
coupling noise into the meter or 06 option.
-32-
5.2
cone inued
VIII Testing and Operation,
After the 06 Option has been wired per Section II; and
the 05 Option, if any, has also been wired, apply power
to the meter. An input in the norms 1 operating range
should be applied to the meter. The meter reading
should be normal.
Press che fronc panel button. The switching point
should be displayed. Release the button. After at least
1 second, apply aa input in the alarm zone (avoid
overloading the'meter)* The outputs should go true.
causing a contact closure of the relay. Continuity will
exist between J5-J and J5-9. When che mecer is returned
Co the operacing range the outputs should return to a
false condition causing the relay to change scace giving
continuicy between J5-J and J5-K. If che unit ia wired
nonencarily Co resec the relay.
The mecer is now ready for use in your application.
When the meter reading is in che operacing range, the
meter reads normally and the outputs are false. When
meter, readings enter che alarm zone; the front panel
L.E.D. begins flashing (unless inhibited) and the alarm
goes true. Pressing the fronc panel butcon recalls the
switching point, which is displayed, and also resec i the
alara if latching operation is being used. The alarnis
sd.
NOTE: Fals
overload, ic is recommended Chat you avoid overloading
you r rae ce r.
-33-
-------
APPENDIX G
COMPARISON OF BREATHING IN
AND BREATHING OUT DATA
-------
APPENDIX TABLE G-l
COMPARISON OF BREATHING IN AND BREATHING OUT DATA
Chemical Date
Isopropanol From
To
From
To
From
To
Ethanol From
To
From
To
From
To
From
To
From
To
Acetic Acid From
To
From
To
4/13/78
4/13/78
4/13/78
4/14/78
4/14/78
4/14/78
4/18/78
4/18/78
4/18/78
4/19/78
4/19/78
4/19/78
4/19/78
4/20/78
4/20/78
4/20/78
4/20/78
4/20/78
4/20/78
4/20/78
A ACF
Time In Out
0800
1430 3,436
1430
0645 2,937
0645
1600 4,215
0600
1400 1,325
1400
0630 1,100
0630
1440 1,217
1440
0630 1,553
0630
1530 1,432
0700
1200 7,580
1200
1315 1,219
-------
APPENDIX TABLE G-l (Continued)
COMPARISON OF BREATHING IN AND BREATHING OUT DATA
Chemical
Acetic Acid
(Cont'd) From
To
From
To
From
To
From
To
Ethyl Benzene From
To
From
To
From
To
Cyclohexane From
To
From
To
From
To
Date
4/20/78
4/20/78
4/20/78
4/21/78
4/21/78
4/21/78
4/21/78
4/21/78
5/9/78
5/9/78
5/9/78
5/10/78
5/10/78
5/10/78
5/17/78
5/17/78
5/17/78
5/18/78
5/18/78
5/18/78
Time
1315
1600
1600
0615
0615
1200
1200
1530
0900
1500
1500
0700
0700
1430
0700
1500
1500
0730
0730
1330
A ACF
In Out
1,677
10,884
18,568
1,222
2,460
4,801
3,797
3,169
860
8,253
1) It should be noted that a greater A ACF out occurred in the formaldehyde
and cyclohexane tanks because these are heated, compared to the other tanks
which were at ambient temperature.
-------
APPENDIX TABLE G-l (Continued)
COMPARISON OF BREATHING IN AND
BREATHING OUT DATA
Chemical
Formaldehyde From
To
From
To
From
To
From
To
From
To
Date
4/26/78
4/26/78
4/26/78
4/27/78
4/27/78
4/27/78
4/27/78
4/28/78
4/28/78
4/28/78
Time
0630
2130
2130
0800
0800
1500
1500
0815
0815
1400
A ACF
In Out
4,081
125
2,350
194
4,215
-------