EPA-650/4-75-024-H
                        Environmental Monitoring Series
                                  GUIDELINI
     FOR QUALITY ASSURANCE  PROGRAMS
           FOR MOBILE SOURCE  EMISSIONS
                   MEASUREMENT SYSTEMS:
                PHASE IV, HEAVY-DUTY GASOLINE ENGINES  -
                                  TEST PROCEDURES
                              U.S. Environmental Protection Agency
                               Office of Research and Development
                                   Washington, 0. C. 20460

-------
                      GUIDELINE DISTRIBUTION RECORD

          EPA-650/4-75-024-h "Guidelines for Quality Assurance Programs  for
          Mobile Source Emissions Measurements  Systems:   Phase IV,  Hea'vy-Duty
          Gasoline Engines - Test Procedures"

     The series of documents, "Guidelines for Quality Assurance Programs for
Mobile Source Emissions Measurement Systems," have been prepared and issued in a
revisable document-controlled format so that any future revisions or additions
may be distributed to the Guideline users.  Individual copy numbers have
been assigned to each volume of the series.  These numbers appear on this record
sheet and on the title page of each document.  The user of these documents must
complete the "Distribution Record Card" and return it in the pre-addressed
envelope to the address shown below so that automatic distribution for future
revisions may be made directly to the user.  Also, notice of any reassignment
of the documents by number and title to other individuals (by name, address,
and copy number) should be sent to the same address.

                    U.S. Environmental Protection Agency
                    Office of Mobile Source Air Pollution Control
                    2565 Plymouth Road
                    Ann Arbor, Michigan  48105

                    ATTN:  Quality Assurance                     COPY No.


                       (cut along dotted line)


                              DISTRIBUTION RECORD CARD

   Guideline
     User       	                          Date
            Last Name         First          Middle Initial
                              Title

   Address
   to Send	
   Future                     Street
   Revisions                  5treet
   and	
   Additions
            City              State          Zip Code

   If address is a firm (fill in)	
                                             Firm
   I have received copy No.      of EPA-650/4-75-«024-h "Guidelines for Quality
      Assurance Programs for Mobile Source Emissions Measurement Systems:
      Phase IV, Heavy-Duty Gasoline Engines - Test Procedures"

   Please send me any revisions and additions of this volume.

-------
                                     EPA-650/4-75-024-h




                  GUIDELINES


FOR QUALITY  ASSURANCE  PROGRAMS


    FOR MOBILE SOURCE  EMISSIONS


        MEASUREMENT  SYSTEMS:


       PHASE IV, HEAVY-DUTY GASOLINE ENGINES -

                  TEST  PROCEDURES

                         by

          Harold Wimette, Rod Pilkington, and Tom Kelly

                 Olson Laboratories , Inc.
                 421 East Cerritos Avenue
                 Anaheim, California 92805
                                                   401
                  Contract No. 68-02-1740
                    ROAP No. 26BGC
                Program Element No. 1HA327


                   EPA Project Officers:

                     R. C. Rhodes
      Quality Assurance and Environmental Monitoring Laboratory
          Research Triangle Park, North Carolina 27711
                         and

                    C. Don Paulsell
                Office of Program Management
                 Ann Arbor, Michigan 48105


                     Prepared for

           U.S. ENVIRONMENTAL PROTECTION AGENCY
           Office of Mobile Source Air Pollution Control
                         and

              Office of Research and Development
                 Washington, D. C. 20460

                       June 1975

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                        EPA REVIEW NOTICE

This volume has been prepared by Olson Laboratories, Incorporated
consistent with the Environmental Protection Agency Quality Assurance
principles and concepts and with the Environmental Protection Agency Mobile
Source Testing Practices at Ann Arbor, Michigan.

The guidelines and procedures are generally applicable to mobile
source testing operations and are intended for  use by those engaged in such
measurement programs

It is requested that recipients and users of this document  submit any
comments and suggestions to the Project Officers.

Mention of trade names or commercial products does not constitute
Environmental Protection Agency endorsement  or recommendation for use.
                    RESEARCH REPORTING SERIES

 Research reports of the Office of Research and Development,  U.S .  Environ-
 mental Protection Agency, have been grouped into series.  These broad
 categories were established to facilitate further development and applica-
 tion of environmental technology.  Elimination of traditional grouping was
 consciously planned to foster technology transfer and maximum interface
 in related fields.  These series are:

           ].  ENVIRONMENTAL HEALTH EFFECTS RESEARCH

           2.  ENVIRONMENTAL PROTECTION TECHNOLOGY

           3.  ECOLOGICAL RESEARCH

           4.  ENVIRONMENTAL MONITORING

           5.  SOCIOECONOMIC ENVIRONMENTAL STUDIES

           6.  SCIENTIFIC AND TECHNICAL ASSESSMENT REPORTS

           9.  MISCELLANEOUS

 This report has b«ysn assigned to the ENVIRONMENTAL MONITORING
 series. This series describes research conducted to develop new  or
 improved methods  and instrumentation for the identification and quanti-
 fication of environmental pollutants at the lowest conceivably significant
 concentrations.  It also includes studies to determine the ambient concen-
 trations of pollutants in the environment and/or the variance  of pollutants
 as a function  of time or meteorological factors.
 This document is available to the public for sale through the National
 Technical Information Service, Springfield, Virginia 22161.

                  Publication No.  EPA-650/4-75-024-h
                                  11

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                               INTRODUCTION
          The test procedures contained in  this volume are a documen-
tation of the 1975 heavy-duty gasoline emission measurement test require-
ments presently in use at the Ann Arbor facility of the Environmental
Protection Agency.  These test procedures comply with Federal Regula-
tions as stated in the Federal Register,  (Subpart H).  Refer to Section  3,
of Volume I, for a listing of applicable Federal Register paragraphs.
          Section 5, Volume I, outlines the development of an Operations
manual which may be used as a guideline for a Quality Assurance program.
A typical format of a test procedures manual is described and offers a
guide for implementing and interpreting the test procedures contained in
Volume II.  A user may accept the manual in its presented form, or may
modify the format to suit specific contractual obligations, or delete
certain procedures which may not be performed at that facility.  The
user will be required to make revisions as  needed to assure that the
manual complies with Federal Regulations.   Revisions may be implemented
manually, by computer updates or by magnetic card storage.
          For ease of use, the test procedures are separated into nine
distinct sections, numbered 100-900.  The table of contents shows the
major heading of each section and the test  procedures contained in each.
To differentiate between the light-duty and heavy-duty testing which are
both included in this contract, the test procedures are numbered to
correspond to Light Duty, 101-149, 201-249, etc. and Heavy Duty, 150-
199, 250-299, etc.  Heavy-duty diesel procedures modified  for use with
heavy-duty gasoline engines are suffixed with  a -G, e.g.TP-750-G.
Certain procedures developed for Phase  I  and  II  (Light-Duty Gasoline
Vehicle and  Heavy-Duty Diesel Engine) are equally applicable  to Phase IV
 (Heavy-Duty  Gasoline  Engines) and have  been included  in this  volume,
utilizing the original Test Procedure reference number allocated  for
Phase  I and  II.
           To assist in defining  the  overall scope of  the  heavy-duty
testing program,  the  tables  from Section  3, Volume  I, briefly outlining
the  test  procedures,  specifications,  and  quality provisions are included
in the introduction to  the  test procedures  manual.
           This  document  details  test procedures  for heavy-duty  gasoline
engines.  The test procedures  for  light-duty diesel  (Phase III)  appear as
a supplement to the light-duty  gasoline vehicle procedures detailed  in
Phase  I,  Volume II.   Heavy-Duty  Diesel  Engine Test  Procedures appear  in
Volume II of the Report  for  Phase  II.
                                   111

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                     TABLE   OF   CONTENTS


                                                                       Page

INTRODUCTION	     ill

TEST PROCEDURE SUMMARY	     vii

                                                                      Effective
Section                                                                Date(s)
 100      GAS BLENDING, FUEL ANALYSIS AND INVENTORY
 101      Preparation of Binary Gas Mixture  ....
 102      Calibration of Gas Mixtures 	
 200      CALIBRATION 	
 203      Gas Analyzer Calibration Curve Generation . .  .
 204      Chart Recorder Calibration	
 205      Temperature Recorder Calibration	
 206      Barometric Pressure Calibration and Correlation
 250      Engine Dynamometer Calibration  	
 300      VERIFICATION	
 304      CO /HO Interference Check.
 400      CORRELATION 	
 401      Analyzer Cross Check.
 600      DAILY OPERATION  .  .  .
 601      Log Book Entries.  .  .
 602      Drift/Noise/Gain/Tune
  700      EMISSION TESTING	,
  750-G    Receipt, Build-up  and  Installation of  the Gasoline
          Test Engine	,
  757      Heavy  Duty Gasoline Engine  Dynamometer Test Cycle  .  .
  758      Heavy  Duty Gasoline Engine  Exhaust Analysis Procedure,
           CO,  CO ,  HC,  and NO
                 £*
  800      DATA VALIDATION 	
  850      Data Validation-Heavy Duty Testing.

  900      PROGRAM PLANNING AND QUALITY AUDIT.

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HEAVY DUTY GASOLINE ENGINE TEST PROCEDURE SUMMARY
OR TASK
1 Engine,
Receiving
Inspection
2. Engine
Installation
3. Englne/Dyno
Check out
4. Engine
precondi-
tioning
5. Engine Test
Cycle
6. Sampling
System
7. Instrument
Calibration
8. COj/HjO
Response
check
9. Sample
Analysis
10. Data
Reduction
DRIEF DESCRIPTION
Engine shipped to the EPA
from the manufacturer 1s
Inspected for damage and
conformance to Installation
The engine and preaHgned
stand are Installed In the
test cell and attached to
the dynamometer
The engine Is operated
at Idle and load condi-
tions to check for
proper operation.
Engine parameters are
checked against nanu-
facturer's specifications
Start engine and pre-
condition with one or
more cycles, service
accumulation or test
cycle. Allow to soak
prior to test
An Initial 5 minute
Idle, two Mrmup cycles,
and two hot cycles
constitute a complete
Dyno Run
Comprised basically of
S NDIR Instruments.
Sample pumps, refrigera-
tion, flow controls and
pressure and flow meters
Calibration gases with
concentrations varying
across the Instrument
range are used to Identify
the Instrument curve for
data reduction
The Hydrocarbon instruments
are checked monthly for
Interference from water
vapor and carbon dioxide
A portion of the exhaust
gases are analyzed con-
tinuously from the first
Idle thru four nine-mode
cycles ending with the
engine at Idle.
Direct computer analysis
of Instruments' output Is
used to reduce the data
to brake specific emis-
sions (gms/hr.)
	 rotr: 	
EPA TP NO.
FR. Vol. 40
2-27-75
85.774-29(a)
TP 750-G
85.774-11
05.774-16(a)(l)
TP-750-6
85.774-16(2)
TP-750-6
B5.774-7.il, 16
TP-757
85.774-11,12.16
TP-757
35.775-13
TP-758
05.775-15
TP-203
TP-758
35.775-15
TP-304
05.775-1C, 17
TP-758
1)5. 775-16
TP-758
	 SPECIFIC*™ OR 	
TOLERANCE-FEO. REG.

Dynamometer capable of
maintaining constant
speed '100 RPN from full
throttle to closed
throttle motoring
Adjustments on engine
are limited to
unscheduled mainte-
nance listed In
Ref. Para.
Engine must reach
normal operating
conditions, soak time
1-2 hours temp.,
60-86°F
Arab. Temp. 68-86°F
2000 t 100 RPN
Idle - Hfr. spec.
Instrument ranges
LHC 0-1000 pom Equlv.
LHC 0-10.000 pjm Equlv.
CO 0-101, C02 0-161
NO 0-4000 ppm
Calibrated once every
30 days, Flowrate HHC,
LHC, NO 10CFN,
CO, CO, 5 CFH
Concentration of gas
should be known with-
in ±2J of true value
CUy loot - Response not to
exceed 0.51 Sat. N» 75°F -
LHC- 0.51 of full scale,
HHC 0.5)1 of full scale.
Chart Speed 6 1n./m1n.
Min. 4-nlne mode cycles.
2 Idle roodes-before and
after test
Chart reading should be
within 0.5J of full
scale. Chart speed 3 In./
lilin. with marker to
Indicate computed segments.
SPECinCA-TTuTS 	
SAE OR ENG PKACT
MS WC Advisory
Circular ;io. 22A
Appendix A.
4-23-7J
MSAPC Mo. 22A
SAE J3166-Eiig1ne
test code
water/oil at
equilibrium temp

Sampling System tubing/
hardware/accessories
must be made of Teflon,
stainless steel or
glass only
Weekly checks, calibra-
tion standards trace-
able to NBS/knowri to
±11 of true value or
better. Curve gene-
rated must be within
:2t uf all points.

Visually i«n1tor Inst.
Inlet pressure during
sampling *1 In. H,0
Tol. *

- 	 IjUAUTV
PROVISIONS
Receiving Inspection
check list
Installation check
list/Inspection by
mfr. rep.
Calibration of
engine analyzer
Speed/ torque/ t»ip.
trace, soak time
checked by Data
Validation
Data validation
Q.A. audit
Approval of system design
and parts 11st, procure-
ment control. Inspection
of system by Q.C. prior
to on-line operation
Curve defined mathe-
matically by least
squares method.
Curve approved by
Data validation/
Audit.
Monthly check
Data validation,
cal ibration check,
Q.C. audit
Data validation.
Computer program
verification, random
audit of test data.
i 	 TUT 	
INVALID
Failure to comply
will) specifications/
shipping damage
Incompl ete/ Improper
installation
Incorrect Engine
parameters
Out of Hi.i1t
soak time/
Temp/Cycle
Deviation of 2 sec.
CT node; 0.3 Inc. Hg.
cru1se/PTO mode,
0.2 Inc. Hg. PTA/FL
Mode last 10 sec. of
Mode. 200 RPM first
4 sec./lOO RPH rest.
System leak/compon-
ent failure/Incor-
rect sample flow or
pressure/cal ibratlon
overdue
Overdue calibration,
system leak during
calibration.
Excessive Inter-
ference from
C02/H20
Excessive hangup
Instrument drift
In excess of I",
or other rial -
function
Incorrect cycle seg-
ments used for con-
puter analysis,
recorder mal -
function.
	 CORRECTIVE 	
ACTION
Contact engine manu-
facture for dis-
position if the
engine.
Correct Discrepancy
Adjust to mfr.
specifications
Repeat precondi-
tioning
Repeat precondi-
tioning and Test
Correct variance and
repeat test
Locate and correct
problem, recali-
brate.
Recharge filter
cell with CO,
Replace de-
lector.
Clean sampling
system, repair
instrument,
repeat test
Manually reduce
data/repeat
test
	 THAIS™™ 	
SKILL LEVEL
Knowledge of engine
installation require-
ments/Inspection
procedures
Mechanical skill and
knowledge of engine/
dyno.
Knowledge of dyno
engine analyzer
operation
Knowledge of engine/
dyno operation
As above
Trained for operation
of analytical systan.
As above
As above
As above. Corrective
action may require
basic knowledge of
electronic instru-
ments.


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700

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 EPA    TEST    PROCEDURE
                                     Number
                                            TP-750-G
                                            Page
                        Of fi
 SUBJECT

RECEIPT, BUILD-UP AND INSTALLATION OF THE HEAVY-DUTY GASOLINE TEST ENGINE
 Reference
MSAPC ADVISORY CIRCULAR NO. 22A 4/3/73
                                            Data Form No.
 Responsible Organization
HEAVY-DUTY TEST OPERATIONS
                                            Computer Program
                                            NONE
 Test Witness
HD - TEST SUPERVISOR
                                            Performance Interval
                                            EACH ENGINE
  Type of Test Report

CHECK LIST	
                                            Supersedes
  Report Distribution
CERTIFICATION - TEST OPERATIONS - DATA FILE
                                            Superseded by
  REMARKS/COMMENTS
                            ORIGINAL RELEASE APPKUVALb
  Office
  Section
Signature
Date
 Lab.  Oper.
Quality Assurance
 Test Oper.
Chief
 HD Testing
Supervisor
 Certification
Heavy Duty
 Change
 Letter
                                     REVISIONS
Description of Change
        Approval
Date

-------
REVISIONS:


RECEIPT, BUILD-UP AND INSTALLATION
OF HEAVY-DUTY GASOLINE TEST ENGINES
TEST PROCEDURE
PROCEDURE NO.
rpD — *7cr\ /~*

PAGE_2_OF £ 	
1.0  PURPOSE

     Outlines the proper procedure for receiving inspection and proper
     installation of engines received for emission testing.

2.0  TEST ARTICLE DESCRIPTION

     Heavy-duty gasoline engines are shipped to the EPA for certification or other
     emission tests.  These engines are prepared for testing by the Manufacturer
     according to the prescribed procedure in MSAPC Advisory Circular No. 22A.

3.0  REFERENCES

     3.1  MSAPC Advisory Circular No. 22A dated April 3, 1973.

     3.2  Federal Register, paragraphs 85.744-12 and 85.974-12.

4.0  REQUIRED EQUIPMENT/CONDITIONS

     4.1  Small  tools  and  necessary plumbing, thermocouple connectors etc.,
          necessary for installation.  See Section 8.0 for more detail.

 5.0  PRECAUTIONS

     5.1  Care  should  be taken when  unloading the engine to place the forks or
          other lifting device properly  to prevent damage to engine or components.

     5.2  Engine should not be lifted nor moved by any part of the engine
          except by those  means provided by  the manufacturer, such as bed plate
          pallet, engine mounts, etc.

     5.3  Never  start  the  engine without first checking  all installation
          connections  and  alignment.

 6.0  VISUAL INSPECTION

     6.1  Receiving -  Check engine for proper packaging  and unloading require-
          ments.  After unloading,  check for proper  shipping  documents and
          markings. Check for any signs of  damage to shipping container and
          engine.

     6.2  Build-up  - Check engine for specified  temperature,  cooling, fuel,
          drive  shaft,  and pressure  connections.

     6.3  Installation - Check for proper  coolant and oil  level,  distance  from
          centerline of shaft to bed plate,  engine lag down bolts.

 7.0  TEST ARTICLE DESCRIPTION

     See  Sections 6.0  and  8.0 for preparation procedures.

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REVISIONS:
                     RECEIPT,  BUILD-UP AND  INSTALLATION
                     OF HRAW-DIITY GASOT.TNR TEST RNCiTMR

                           TEST   PROCEDURE
PROCEDURE  NO.
    TP-750-G
8.0  TEST PROCEDURE

Test Sequence                      Description                        Data Output

  101               Unload from truck using  fork  lift. Verify         Check Sheet
                    shipping weight does  not exceed  forklift          HD-750G-01
                    capacity.

  102               Fill out HD-receipt form.  Explain all            Receiving
                    deficiencies.   List all  parts, number of          Inspection
                    shipping containers,  shipping markings, other     Form No.
                    identifying marks and pertinent  information.      HD-750G-02

  103               Build-up and Install.                             Check Sheet
                                                                     HD-750G-01

                      o  Thermocouple (s)
                      o  Water Hose (s)
                      o  Drive Shaft
                         Check adapter plate bolts
                      o  Oil Pressure Line
                      o  Fuel Feed Line and  Return Line
                      o  Fuel Pressure Line
                      o  Manifold Pressure Line

  104               Check oil level (fill if required),  distance      Check Sheet
                    from centerline of shaft to  bed  plate,  engine     HD-750G-01
                    lag down bolts.

  105               Move engine to test cell and install on the       Check Sheet
                    test bed using the following sequence.            HD-750G-01

                      o  Prepare engine test bed to  receive engine
                         and pre-aligned  stand
                      o  Lift engine onto bed with hoist and bolt
                         it in place
                      o  Bolt coupling to dynamometer and engine
                         shaft; connect fuel oil and coolant systems
                         using hand tools (refer to  appropriate
                         manufacturer's requirements for
                         specifications)
                      o  Check carburetor inlet  air  filter
                      o  Connect thermocouples pressure  gauges, vacuum
                         lines, ignition, accelerator activator
                      o  Check engine for completeness,  engine
                         mounting, and engine alignment,
                      o  Position engine cooling fan if  required

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REVISIONS^
                     RECEIPT,  BUILD-UP  AND  INSTALLATION
                     OF HEAVY-DUTY GASOLINE TEST ENGINES

                           TEST    PROCEDURE
PROCEDURE  NO.
   TP-750-G
8.0  TEST PROCEDURE (CONTINUED)

Test Sequence                      Description                        Data Output

  105 (cont'd)         o  Install  exhaust  system, making
                         provisions for probe location
                      o  Verify compliance maintenance procedures.

  106               Engine -  Dynamometer  check out.  After  careful
                    inspection of the  installation,  the  engine is run
                    to make adjustments.

                      o  Using test cell  dynamometer check  list       Check List
                         confirm  that  all the necessary  connections   HD-750G-03
                         have been made,  instruments and equipment
                         properly installed, and all controls are
                         properly set  prior  to engine start up
                      o  Check safety  interlock system for  proper
                         installation
                      o  Check throttle positioning
                      o  Check oil and water for proper  level
                      o  Check operation  of  system safety interlocks
                      o  Start engine  and perform  visual, audio, and
                         functional inspection
                         Listen for internal noises, such as piston
                         slap, knocks, taps  and gear noises that
                         indicate irregularities in  engine  operation
                         Check for fuel and  lubricant  leaks, check for
                         exhaust and crankcase  emission  leaks
                      o  Bring engine to rated  load  and  speed in gradual
                         steps
                      o  Determine when engine  conditions have
                         stabilized and record  BHP and fuel rate      Dyno Log
                      o  Lug engine to peak torque speed and
                         record torque and fuel rate
                      o  Check engine performance  for  compliance
                         with manufacturer's specifications; if non-
                         compliance is noted,  contact  supervisor
                      o  Shut down engine and dynamometer systems  and
                         record time and ambient temperature
                      o  Fill out request for repairs  if necessary
                      o  All pretest functions  should  be completed with
                         a minimum amount of engine  running time

107                 Preparation of test engine for return to          Check List
                    Manufacturer                                     HD-750G-04

                    o  Disconnect;

                      o  Drive Shaft - Dyno End,  only

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REVISIONS--
                     RECEIPT, BUILD-UP AND INSTALLATION
                     OF HEAVY-DUTY GASOLINE TEST ENGINES

                           TEST     PROCEDURE
                                                  PROCEDURE NO.
                                                    TP-750-C;

                                                  PAGE_5_OF £	
8.0 TEST PROCEDURE  (CONTINUED)
Test Sequence
                   Description
Data Output
                      o  Engine Stand Lag Down Bolts
                      o  Accessory Stands
                      o  Exhaust System at exhaust manifold only
                      o  All temperature thermocouple wires from
                        Control Room assembly
                      o  All sample probe lines from engine only
                      o  All fuel, oil, vacuum, manifold, pressure
                        and feed lines from Control Room assembly
                        only
                      o  Oil coolant hoses from Coolant  package

                    o Move Engine and Exhaust System

                      o  Gasoline Engine (s) to Room 409

                    o Disconnect

                      Remove  and put in proper place
                    o All thermocouples, wires and fitting
                       (if installed by E.P.A.)
                    o Water Hoses
                    o Drive Shaft
                    o All fuel, oil, vacuum, manifold,  pressure
                      and feed lines and fittings
                 o  Drain

                    o Follow  manufacturer's recommended
                      procedure for draining coolant
                      Drain oil if necessary

                 o  Re-Install
               NOTE:
        Exhaust  System and all other engine
        parts and accessories received

        Check HD Receiving form to assure
        shipment is complete as received
  108
Complete Shipping  Order No. HD-750G-05
                                       8

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REVISIONS:


RECEIPT, BUILD-UP AND INSTALLATION
OP HEAVY-DUTY GASOLINE TEST ENGINES
TEST PROCEDURE
1 kW 1 1 l\VX%«b iX WI\C
PROCEDURE NO.
TP-7sn-p
PAOF6,^<">F6

9.0  DATA INPUT

     9.1  Check sheets validated by supervisor and place into test file.

10.0 DATA ANALYSIS

     None

11.0 DATA OUTPUT

     None

12.0 ACCEPTANCE CRITERIA

     12.1 Engine as received must conform to specifications outlined in MSAPC
          Advisory Circular No. 22A (4-3-73).

     12.2 Engine must conform to manufacturer's specifications.

     12.3 Engine must not exhibit any malfunctions such as oil leaks, engine
          noise, erratic running or overheating.

 13.0 QUALITY  PROVISIONS

     13.1 Engine returned to manufacturer if all specifications not met.

     13.2 Engine installation  approved by supervisor and certification
          engineer.

     13.3 Data validation inspects  check lists  for discrepancies and
          completeness.

     13.4 Discrepancies noted  during  receiving  inspection reported to
          supervisor  and quality assurance.

-------
                      Check List - Receipt, Build-Up And
                       Installation Gasoline Test Engine
Description

  Unload from truck

  Visual Inspection;



  Build-up and Install;
  Check:
  Move to test  cell:
  Connect:
                                   Oper. Init.
Fill out HD-receipt form
Explain all deficiencies
List all parts
                         (s)
Temperature Thermocouple
Water Hose (s)
Drive Shaft (check adaptor plate
             bolts)
Oil Pressure Line
Fuel Feed Line
Vacuum Line(s)
Ignition Wiring
Fuel Pressure Line

Oil Level  (fill if required)
Distance C/L shaft to bed plate
Engine Lag Down Bolts

Center engine stand on
bed plate  and lag down

Temperature Thermocouple  (s)
Water Hoses
Drive Shaft
Oil Pressure Line
Fuel Feed Line
Fuel Pressure Line
Vacuum Line(s)
Ignition Line
Accelerator Actuator
Exhaust System
Exhaust Sample Probes
Cooling Fan (if required)
Form  HD-750G-01
                                       10

-------
Date
Engine C.I.D.







Test Type




# Pieces
Description
Condition
Received by
Test Date
HC
CO
NOV
                   Manufacturer




                   Engine I.D.#
Cert.|    ~{      Dura.|    ~|
Correl.f    }      Other
                    Test #
                 EPA
                                                               EPA
                       Accel.




                       Lug	
Manufacturer's Rep. Signature




Certification Rep. Signature
                   Returned Date
Form HD-750G-02 - Receiving Inspection Report
                                       11

-------
                        Check List Test Cell 3 and 4
                    Gasoline Engine Dynamometer Operation


Check:    Water Cooler Package;                                  Oper. Init.
               Water ON                                          	
               Expansion Tank - 2/3 to 3/4 full                  	
               Booster Pump ON                                   	
               Air Pressure - ON
          Control Boom Assembly;
               Vacuum Line - Installed
               Fuel Line - Installed
               Fuel Pressure Line - Installed
               Oil Pressure Line - Installed
               Temperature Thermocouple  (s) - Installed
               Ignition Wire - Connected
               Throttle Control - Connected

          Dynamometers;
               Drive Shaft - Connected
               Drive Shaft Guard - Connected

          Engine
               Water Hoses - Connected
               Exhaust Muffler etc: - Connected
               Exhaust Sample Probes - Connected
               Fuel Regulator - Correct  Setting
               Cooler Fan  {if used) - ON
Console
  All Potentiometers in OFF position    	 Power ON in M.G. Room
  M. G. set - ON- 10 min. warm-up min.  	 Primary Power - ON
  Vacuum Manometer at zero              	 Ignition - ON
  Rotation - CW - front side            	 Temp. Recorder - ON
            CCW - rear side             	
  Inertia - Pos. position               	 Wet Bulb thermo-filled
  Mode - Manual                         	  and power ON
  Strip chart recorder - ON             	
Form HD-750G-03
                                      12

-------
                      Check List - Preparation of Test
                         Engine for Return to Mfr.


Description                                                      Oper.  Init.

  Disconnect;  Drive Shaft - Dyno End, only.                     	
               Engine Stand Lag Down Bolts.                      	
               Accessory Stands.                                 	
               Water Hoses from Coolant package.                 	
               Exhaust System at Exhaust manifold only.          	
               All Temp, thermocouple wires from Control
               Boom Assembly.                                    	
               All sample probe lines from engine only.          	
               All fuel, oil, vacuum, manifold, pressure, and
               feed lines from Control Boom Assembly only.       	
               Oil coolant hoses from Coolant package.           	

Move Engine  and Exhaust System
               Heavy-Duty Gasoline Engine(s) to Room 409.        	

Disconnect,    Remove and put in proper place:
               All Thermocouples, wires and fittings
                (if installed by E.P.A.)                          	
               Water Hoses                                       	
               Drive Shaft                                       	
               All fuel, oil, vacuum, manifold, pressure  and
               feed lines and  fittings.                          	

               Coolant  complete;  oil (if  required).              	

	    All pipe plugs,  cap plugs  and other  fittings
               removed  by E.P.A.                                 	

Disassemble:   Exhaust  System and all other engine
Pack in Box;   parts and accessories received.                   	
Strap  to Skid;

               Note:  Check HD Rec.  form to assure  shipment  is
                      complete as received.
 Form HD-750G-04
                                        13

-------
                       Environmental Protection Agency
                       Office of Air S Water Programs
                             2565 Plymouth Road
                         Ann Arbor, Michigan  48105
                                 SHIPPING ORDER
                                                       No.
                                                       Date

Ship To  :                              Charge To:

Address  :                              Address   :

Attention:                              Attention:
The following  listed material/equipment/engine(s) now on consigment/loan to
this facility  is herewith returned per signature of your carrier  (or, common
carrier, if applicable.)

Quantity       Description	       Ser. No.
The above items were received by
                                                 (Signature)
on	
             (Date)
Form HD-750G-05
                                       14

-------
EPA TEST
PROCEDURE NUmbTO-757
Page i of 6
SUBJECT
HEAVY-DUTY GASOLINE ENGINE DYNAMOMETER TEST CYCLE
Reference
FEDERAL REGISTER VOL. 40 NO. 40 FEBRUARY 27, 1975
Responsible Organization
TEST OPERATIONS
Test Witness
SUPERVISOR - HEAVY-DUTY TESTING
Type of Test Report
COMPUTER OUTPUT
Report Distribution
CSD/LAB. CHIEF/MFR. REP. /DATA FILE
Data Form No.
Computer Program
Performance Interval
EACH TEST
Supersedes
WRW
Superseded by
REMARKS/COMMENTS
ORIGINAL RELEASE APPROVALS
Office
PROP RAM MPMT
LAB. BRANCH
LAB. BRANCH



Change
Letter
Section Signature
OT1AT TTV A^^TTPZXWn?
CHIEF
TEST OPERATIONS CHIEF





Date





REVISIONS
Description of Change Approval

Date

15

-------
REVISIONS:


HEAVY-DUTY GASOLINE ENGINE
DYNAMOMETER TEST CYCLE
TEST PROCEDURE
PROCEDURE NO.
TP-757
PAGE 2 OF 6

1.0  PURPOSE

     A prescribed sequence of engine operating conditions are conducted on an
     engine dynamometer to determine conformity with the standards stated in
     the Federal Register.

2.0  TEST ARTICLE DESCRIPTION

     Applicable to new gasoline heavy-duty engines beginning with the 1974
     model year.  A heavy-duty engine is defined as any engine which the
     engine manufacturer could reasonably expect to be used for motive
     power in a heavy-duty vehicle.

3.0  REFERENCES

     3.1  Federal Register, Volume 40, Number 40, February 27, 1975.
          pp 8482 - 8495

4.0  REQUIRED EQUIPMENT/CONDITIONS

     4.1  An engine dynamometer capable of maintaining constant speed +_ 100 RPM
          from full throttle to closed throttle motoring.

     4.2  A chassis-type exhaust system or equivalent.

     4.3  A radiator typical of that used with the engine in a vehicle or
          equivalent.

     4.4  Auxiliary fixed speed cooling fan (if required.)

     4.5  Tape recorder with prerecorded instructions for dynamometer operator.

     4.6  Fuel shall be Indolene clear or Indolene HO if catalyst equipped.

5.0  PRECAUTIONS

     5.1  Maintain ambient temperature of test cell between 60°F to 68°F during
          engine soak period and between 68°F to 86°F during test cycle.

     5.2  Tolerances for time, speed and manifold vacuum must be followed
          during cycle in order to perform valid test.

     5.3  Visual and audible observation of engine-dyno operation should be
          performed during test.  Shut down engine-dyno if abnormalities
          are detected.

-------
REVISIONS:


HEAVY-DUTY GASOLINE ENGINE
DYNAMOMETER TEST CYCLE
TEST PROCEDURE
PROCEDURE NO.
TP-757
PAGE J 	 OF .§ 	
6.0  VISUAL INSPECTION




     6.1  Perform visual inspection of engine-dyno systems prior to start up.




     6.2  Inspect fuel system for leaks before and after test.




7.0  TEST ARTICLE PREPARATION




     Refer to TP-750-G.
                                         18

-------
REVISIONS:


HEAVY-DUTY GASOLINE ENGINE
DYNAMOMETER TEST CYCLE
TEST PROCEDURE
PROCEDURE NO.
TP-757
PAftP 4 r>P 6
8.0  TEST PROCEDURE

     An initial 5-minute idle,  two warm-up cycles and two hot cycles constitute
     a complete dynamometer run.   Idle modes may be run at the beginning and
     end of each test only, thus  eliminating the need to change speed between
     cycles.

Test Sequence                      Test Description                   Data Output

     100       PRECONDITIONING

     101       Start cooling system.

     102       Start the engine and precondition it by operation         Dyno
               over one or more cycles prescribed for service           Log Book
               accumulation or dynamometer operation until the           Water
               engine has reached normal operating conditions.          Temp.°F

     103       Shut down engine and cooling system and allow              Record
               to stand for at least 1 hour but not more than              Soak
               2 hours.                                                    Time

     200       TEST CYCLE

     201       Start cooling system.

     202       Start engine and operate within the manufacturer's
               RPM specifications for off-idle operation for
               5 minutes.

     203       Return the  engine throttle control to the normal
               idle position.

     204       Turn on prerecorded  tape and run  four nine mode          Continuous
               cycles according to  the following time,  speed,             Record
               load requirements.                                         Of  RPM,
                                                                         Manifold
                                                                          Vacuum
                                                                            vs.
                                                                            Time
                                         19

-------
REVISIONS:
                         HEAVY-DOTY  GASOLINE ENGINE
                           DYNAMOMETER TEST
                           TEST    PROCEDURE
                               PROCEDURE NO.
                                 TP-757
Test Sequence
Test Description
  Data Output
          SEQUENCE NO.    MODE   MANIFOLD   TIME IN   CUMULATIVE   WEIGHTING
                                 VACUUM  MODE-SECS. TIME-SECS.    FACTORS
          1	Idle	       70
          2	Cruise... 16"  Hg...       23
          <3 * • • •*•••••• f TA •••**» j-\J  *-*^3 • • *       44
          4	Cruise—16"  Hg—       23
          5	PTD	19"  Hg...       17
          6	Cruise	16"  Hg...       23
          7	FL	  3"  Hg...       34
          8	Cruise... 16"  Hg...       23
          9	CT	       43
                      70
                      93
                     137
                     160
                     177
                     200
                     234
                     257
                     300
0.232
 .077
 .147
 .077
 .057
 .077
 .113
 .077
 .143
                    The engine dynamometer shall be operated at
                    a constant speed of 2,000 r.p.m. +100 r.p.m.
                     (Speed deviations,  not to exceed 200 r.p.m.,
                    will be allowed during the first four seconds
                    of each mode.)

                    The idle operating mode shall  be carried out
                    at the manufacturer's recommended  engine speed.
                    The CT operating mode shall be carried out at
                    the same engine speed as above.

                    If the specified manifold vacuum can not be
                    reached during the PTD mode,  the engine shall
                    be operated at closed throttle during that mode.
                    If the specified manifold vacuum can not be
                    reached during the FL mode, the  engine shall
                    be operated at wide open throttle  during that
                    mode.
      205       Record fuel flow and brake horsepower during  each
               mode.

      206       Shut down engine and cooling system after  last idle
               period.
                                     Lbs/Hr
                                     Torque

                                     Record
                                     Engine
                                     Running
                                      Time
                                        20

-------
REVISIONS:


HEAVY-DUTY GASOLINE ENGINE
DYNAMOMETER TEST CYCLE
TEST PROCEDURE
1 k «? 1 t I\X^ V»k \J V/IVb
PROCEDURE NO.
TP-757
PA«F 6 ni6

9.0  DATA INPUT

     9.1  Test number/system tested/inst. oper./dyno oper./engine make/I.D. #/
          mfr. data.

     9.2  Engine date of manufacture/engine hours/CID/family/idle RPM/carb/BBl.

     9.3  Date and time of day for each part of the test schedule.

     9.4  Intake manifold vacuum and engine RPM continuously recorded on the
          same chart.

10.0 DATA ANALYSIS

     10.1 Determine whether the cycle was run in accordance with Acceptance
          Criteria (12.0) by observing chart peaks, speed trace and manifold
          vacuum traces.

11.0 DATA OUTPUT

     11.1 All data entries and chart records maintained in HD Test File.

12.0 ACCEPTANCE CRITERIA

     12.1 The test will be invalidated if there is a deviation by more than:

          (a)  two seconds from the specified time for the CT mode, or
          (b)  0.3 inch Hg during the cruise and PTD modes, or more than
               0.2 inch Hg during the PTA and FL modes from the specified
               mode vacuums during the last ten seconds of a mode, or
          (c)  200 r.p.m. during the first four seconds of each mode, or
               100 r.p.m. during the remainder of each mode.

13.0 QUALITY PROVISIONS

     13.1 Dynamometer calibrated monthly according to TP-250.  Weekly single
          point torque  check.

     13.2 Fuel flow meter calibrated using dead weight tester.

     13.3 RPM/torque recorder  output checked prior to each test.   Recorder
          serviced and  calibrated at 3 month intervals.

     13.4 Driving tape  checked monthly for proper timing  and  wear.
                                        21

-------
 EPA    TEST   PROCEDURE
                    Number
                        TP-758
                                                               Page    i   of
 SUBJECT

 HEAVY-DUTY GASOLINE ENGINE EXHAUST ANALYSIS PROCEDURE, CO, CO  , HC AND NO
 FEDERAL REGISTER VOL. 40 NO. 40 FEBRUARY 27,  1975
                                                               Data Form No.
 Responsible Organization

 TEST OPERATIONS
 Test Witness
 SUPERVISOR - HEAVY-DUTY TESTING
                                              Computer  Program

                                              SAQP: GAS
                                              Performance  Interval
                                              EACH TEST
 Type of Test  Report
 COMPUTER OUTPUT
 Report Distribution
 CSD/LAB. CHIEF/MFR. REP./DATA FILE
                                              Supersedes
                                              NEW
                                              Superseded by
 REMARKS/COMMENTS
                           ORIGINAL RELEASE APPROVALS
 Office
   Section
Signature
Date
PROGRAM MGNT
                 QUALITY ASSURANCE
LAB. BRANCH
CHIEF
LAB. BRANCH
TEST OPERATIONS CHIEF
Change
Letter
                                    REVISIONS
 Description of Change
        Approval
Date
                                      23

-------
REVISIONS:


HEAVY-DUTY GASOLINE ENGINE EXHAUST
ANALYSIS PROCEDURE, CO, CO,, HC AND NOy
TEST PROCEDURE
PROCEDURE NO.
TP-758
PAGE_2_OF 7
1.0  PURPOSE

     Exhaust gases are analyzed continuously during a prescribed sequence of
     engine operating conditions to determine conformity with the standards
     specified in the Federal Register.

2.0  TEST ARTICLE DESCRIPTION

     Applicable to new heavy-duty engines beginning with the 1974 model year.
     A heavy-duty engine is defined as any engine which the engine manufacturer
     could reasonably expect to be used for motive power in a heavy-duty vehicle.

3.0  REFERENCES

     3.1  Federal Register, Volume 40 Number 40 February 27, 1975.
          pp 8482-8495

4.0  REQUIRED EQUIPMENT/CONDITIONS

     4.1  Exhaust gas sampling and analytical system conforming to schematic
          H774-1 (Attachment No. 1) with the following instruments:

          A.   Nitric oxide NDIR analyzer, range 0-4000 PPM

          B.   Carbon monoxide NDIR analyzer, range 0-10 percent

          C.   Carbon dioxide NDIR analyzer, range 0-16 percent

          D.   High-range hydrocarbon NDIR analyzer, range 0-10,000 PPM hexane
               equivalent  (propane cone, x 0.52)

          E.   Low-range hydrocarbon NDIR analyzer, range 0-1,000 PPM hexane
               equivalent.

          Sample lines, filter, valves, pumps, flowmeters and other components
          which are in contact with exhaust sample must be of stainless steel,
          teflon, viton or glass construction.

     4.2  Zero grade air or nitrogen meeting the following maximum requirements
          of contamination level

                         Carbon Response =  10 ppm
                         CO Response     =  10 ppm
                         NO Response     =   1 ppm
                         CO2  Response    =  400 ppm
                                        25

-------
REVISIONS:


HEAVY-DUTY GASOLINE ENGINE EXHAUST
ANALYSIS PROCEDURE, CO, CO,, HC AND NOX
TEST PROCEDURE
PROCEDURE NO.
TP-758
PAOF.3 OF 7

     4.3  Calibration gases  with concentrations  known to be within ±2 percent
          of true value  as follows  (N2  diluent):
                    Low range    High  range    NO ana-
                    HC analyz-   HC analyz-    lyzer-
                    er-Hexane    er-Hexane       NO
                    equivalent^  equivalent
  CO and CO2
analyzers-Blend
 of CO and CO2
   containing

   CO plus C02

p.p.m
100 	
200 	
300 	
400 	
600 	
800 	
1,000 	





p. p. in
600 	
1,000 	
1,500 	
2,500 	
4,000 	
6,000 	
8,000 	
10,000 	




p.p.m i
250 	
500 	
750 	
1,000 	
1,500 	
2,000 	
2,500. 	
3,000. ...
3,500 	
4,000 	

Mole
percent
0.5
1.0
2.0
3.0
4.0
6.0
8.0
10.0



Mole
percent
16.0
15.0
14.0
13.0
12.0
10.0
8.0
6.0



                     The hexane equivalent of propane when used as the
                    normalizing gas for calibrating nondispersive infrared
                    analyzer is prescribed to be 0.52 (propane concentra-
                    tion x 0.52 = hexane equivalent concentration).  Mini-
                    mum storage temperature of the cylinders shall be 60OF;
                    minimum use temperature shall be 68°F.

          NOTE:  Concentration values should be traceable to EPA gravimetric
                 standards.

     4.4  Daily working gases (span gases)  equivalent to 80 to 100 percent full
          scale response for each range.

     4.5  Recorders (4 channels)  for continuous record of analyzer output and
          calibration.

5.0  PRECAUTIONS

     5.1  Safety precautions should be followed when handling compressed gases.
          NO and CO are toxic gases.

     5.2  Insure gas cylingers have adequate pressure for testing ^200 psig.)

     5.3  When calibrating/spanning/sampling the identical instrument inlet
          pressure must be used.   Adjust flows to pressure reading rather
          than flowmeter.
                                         26

-------
REVISIONS:


HEAVY-DUTY GASOLINE ENGINE EXHAUST
ANALYSIS PROCEDURE, CO, CO2, HC AND NOX
TEST PROCEDURE
PROCEDURE NO.
TP-758
PAGEJ 	 OF I 	
     5.4   Insure that flowrates  are adequate to minimize response time.

     5.5   Check the  condition of the drier in the nitric oxide analyzer
          sampling line.   Replace the drying agent if necessary.

     5.6   Insure that the  sample probe(s)  is properly inserted 2  feet into
          tailpipe.

6.0  VISUAL INSPECTION

     6.1   Inspect recorder connections and other electrical connections  to
          insure they are  secure.

     6.2   Inspect pressure gauges and flowmeters for proper operation, stuck
          floats, pointers,  etc.

     6.3   Inspect system vent for proper connection.

7.0  TEST ARTICLE PREPARATION

     7.1  Leak check exhaust gas sampling system by closing off valve at
          sample probe.  All pressure gauges should drop to zero reading.

     7.2  Calibrate  exhaust emission analyzer system using zero and span gases.
          Adjust  instrument gain and zero as required.  Analyzers require a
          minimum of 2 hours warm-up, therefore they are usually never turned
          off, except for  chopper motors, while they are in service.

     7.3  The following inter-service checks are performed monthly.

           (5)  Check response of hydrocarbon analyzer to 100 percent
               CO.   If response is greater than 0.5 percent full scale,
               refill filter cells with 100 percent CO, and recheck.
               Note any remaining response on chart.  If response
               still exceeds 0.5 percent, replace detector.

           (6)  Check response of hydrocarbon analyzers to nitrogen
               saturated with water at ambient temperature.  Record
               ambient temperature.  If the low-range instrument
               response exceeds  5 percent of full scale with saturated
               nitrogen at 75°F., replace the detector.  If the high-
               range response exceeds 0.5 percent of full scale, check
               detector on low-range instrument, then reject if
               response exceed  5 percent of full scale at 75°F.

     7.4  Change filter papers  and back  flush water traps and sample  line.

     7.5  Turn-on sample pumps.
                                         27

-------
REVISIONS:
HEAVY-DUTY GASOLINE ENGINE EXHAUST
ANALYSIS PROCEDURE, CO, CO2, HC AND NOX

       TEST    PROCEDURE
PROCEDURE NO.
  TP-758
 8.0 TEST PROCEDURE

     The exhaust sample is analyzed continuously during 4 nine-mode  cycles.

 Test Sequence                     Test Description                   Data Output
     101       Check zero,  span,  flow and pressure immediately prior
               to start of  cycle.

     102       Start sample flow  and recorders when engine throttle
               control is returned to normal idle position from the
               initial off-idle position.  Chart speed should be
               6 inch per minute.

     103       Sample and analyze exhaust gases for 4 nine-mode
               cycles  (TP-757)  including the final idle mode.
      104      Purge sample line with nitrogen to establish a
               a constant hydrocarbon "hangup".
      105       Recheck zero, span, flowmeter, pressure gauge
                readings.
                                                   Recorder
                                                    Defl.
                                                   Recorder
                                                    Defl.
                                                  Continuous
                                                    Trace,
                                                   Computer
                                                    Input

                                                   HC Defl.
                                                      vs.
                                                     Time
                                       28

-------
REVISIONS--

HEAVY-DUTY GASOLINE ENGINE EXHAUST
ANALYSIS PROCEDURE, CO, COp, HC AND NOV
TEST PROCEDURE
PROCEDURE NO.
TP-758
PAftP 6 ftF 7
9.0  DATA INPUT

     9.1   The following  steps  are performed by direct computer analysis.

          (a)  Time correlate  the hydrocarbon,  carbon monoxide,  carbon
              dioxide,  and nitric oxide charts.   Determine the  location
              on the chart of analyzer response  corresponding to each
              mode.  Determine and  compensate for trace abnormalities.

          (b)  Locate the  last 3 seconds of the HC,  CO,  CO2,  and NO
              traces obtained from  the 3  inch, 10 inch,  16 inch,
              19 inch and idle modes.  Divide this portion of each
              trace into  a minimum  of three  segments of equal length.
              Determine the chart reading at the end of each segment
              to within 0.5 percent of full  scale.   Convert these
              readings  into concentration values.   Determine the
              average of  these values.

          (c)  The values  recorded for the initial idle  mode are
              used for  both warm-up cycles 1 and 2.   The final  idle
              mode values are applied to  hot cycles 3 and 4.

          (d)  Locate the  HC,  CO, CO2, and NO closed throttle mode
              traces.   Divide each  trace  into a  minimum of 43
              segments  of equal length.   Determine the  chart
              reading at  the  end of each  segmentss within 0.5 percent
              of full scale.  Convert these  reading into concen-
              tration values.  Determine  the average of these
              values.

     9.2   Fuel consumption in  Ibs. per hour are determined for each mode
          including idle.

     9.3   Record test number,  instrument operators,  all  pertinent instrument
          information such as  tuning-gain-serial  numbers-detector number-range,
          barometric pressure, intake air  temperature and humidity.

10.0 DATA ANALYSIS

     10.1 Analysis of all  recorded data performed by Data Validation  for
          completeness,  accuracy and conformance  to specified procedure.

11.0 DATA OUTPUT

     11.1 Concentration  values are reduced by computer to brake specific  values
          (gms/hr) for CO, HC  and NOV using specified weighting and humidity
                                    li
          correction factors.
                                        29

-------
REVISIONS:


HEAVY-DUTY GASOLINE ENGINE EXHAUST
ANALYSIS PROCEDURE, CO, CO2» HC AND NOX
TEST PROCEDURE
i tw 1 ri%N^v»t wi%c
PROCEDURE NO.
TP-758
PAOF_Z..<">F 7

12.0 ACCEPTANCE CRITERIA

     12.1 Upon completion of  the  test,  the hydrocarbon concentration (hangup)
          shall drop to 5 percent or  less of  full  scale within 10  seconds and
          3 percent or less of  full scale within 3 minutes,  while  being purged
          with nitrogen at the  specified flow rate, or the test is invalid.

     12.2 A drift in excess of  2  percent of full scale in the  calibration of
          any one or the exhaust  emission analyzers invalidates the test.

13.0 QUALITY PROVISIONS

     13.1 Analyzer calibrations and interference checks performed  monthly while
          in service.

     13.2 Calibration checks performed  before and  after each test.

     13.3 Quality Assurance performs  audit of procedure and  test cell equipment
          on non-routine basis.
                                        30

-------
TP-758  (Attachment No. 1)
                                                                                                     FLi
                                                                                                     V
VIS
   FLOW SCHEMATIC OF EXHAUST  GAS ANALYSIS SYSTEM EMPLOYED BY EPA

-------
                     HEAVY DUTY GASOLINE ENGINE DATA SHEET
 ll
      ENGINE  ID
                 ENS FAKILY
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 FORM NO. HD-758-01
                   i-U-
                                 i   25.  I'"!
                                 I i  26' ! ; : i ! I  i
                          I i  I : Z,7« I : M
                               ; !    23  :
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                                  ,5/28/73
                                       32

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