SPECIFICATIONS FOR VEHICLE EXHAUST GAS ANALYZER SYSTEMS FOR USE IN THE TEXAS VEHICLE EMISSIONS TESTING PROGRAM Texas Commission on Environmental Quality Air Quality Planning & Implementation Division Date: May 1, 2005 I. GENERAL - ASM & OBD/TSI analyzers 1.1 Design Goals .................................................................1 1.2 Manuals .....................................................................2 1.3 Software Certification Documentation ...........................................2 1.3.1 Confidential Information ................................................3 1.3.2 Escrow of Software ....................................................3 1.3.3 Performance Bond .....................................................4 1.4 Warranty Coverage / Mandatory Service Contract .................................5 1.5 Manufacturer Provided Services ................................................5 1.6 Certification Requirements .....................................................9 1.7 Electronic Transmission .......................................................9 1.7.1 Texas Information Management System (TIMS) Overview .....................9 l.7.2 Form, Manner and Frequency of Data Transmittals for TIMS ..................11 1.8 Tamper Resistance ...........................................................11 2.0 HARDWARE SPECIFICATIONS 2.1 Overview ...................................................................13 2.2 General Requirements ........................................................14 2.2.1 Availability of Circuitry ..............................................14 2.2.2 Clock/Calendar .....................................................14 2.2.3 Data and File Transfer ...............................................14 2.2.4 Capability To Access OBD II Fault Codes ...............................15 2.2.5 Mobility ...........................................................15 2.3 Computers & Peripheral Requirements .........................................15 2.3.1 Minimum Required Microcomputer Configuration .......................16 2.3.2 Keyboard ..........................................................19 2.3.3 Modem ............................................................19 2.3.4 Printer .............................................................20 2.3.5 Running Changes and Other Hardware Modifications .....................20 2.4 Exhaust Gas Analysis Equipment for the ASM-2 EIS ..............................20 2.4.1 General ............................................................21 2.4.2 Measured Gases .....................................................21 2.4.3 Emission Accuracy ..................................................21 2.4.4 Sample Rate ........................................................21 2.4.5 Types of Analyzers ..................................................21 2.4.6 Analyzer Requirements ...............................................21 2.4.6.1 Gas Calibration ............................................21 2.4.6.2 Dilution ..................................................23 2.4.6.3 Other Requirements .........................................23 2.4.6.4 Propane Equivalency Factor ..................................23 2.4.6.5 System Response Time requirements ...........................23 2.4.6.6 NDIR Beam Strength ........................................24 2.4.6.7 Date of Last Gas Calibration ..................................24 2.4.6.8 Detection Methods, Instrument Ranges, Accuracy, and Repeatability ..24 2.4.6.9 Minimum Analyzer Display Resolution .........................25 Date: May 1, 2005 2.4.6.10 Interference Effects .........................................25 2.4.6.11 Warm-up Time .............................................26 2.4.6.12 System Lockout During Warm-up ..............................26 2.4.6.13 Electromagnetic Isolation and Interference .......................26 2.4.6.14 Vibration and Shock Protection ................................26 2.4.6.15 Engine Speed Detection ......................................26 2.4.6.16 OBD II Fault Code Retrieval ..................................26 2.4.6.17 Automated Test Process Software and Displays ...................27 2.4.7 Sampling System Components .........................................27 2.4.8 Temperature Operating Range ........................................30 2.4.9 Humidity Operating Range ...........................................30 2.4.10 Humidity ...........................................................30 2.4.11 Ambient Temperature Measurement ...................................30 2.4.12 Barometric Pressure Compensation ....................................31 2.4.13 Acceptance Testing ..................................................31 2.4.14 Service, Repair, and Modification ......................................35 2.5 ASM-2 EIS Dynamometer (Dyno) & Auxiliary Equipment Specifications .............35 2.5.1 Dynamometer Identification ...........................................36 2.5.2 Two-Wheel Drive Vehicle Dynamometer ................................36 2.5.3 ASM-2 Load Horsepower .............................................36 2.5.4 Power Absorption ...................................................36 2.5.4.1 Acceptable Configurations ....................................36 2.5.4.2 Power Absorber Range ......................................36 2.5.4.3 Power Absorber Accuracy ....................................37 2.5.4.4 Vehicle Loading ............................................37 2.5.5 Inertia .............................................................37 2.5.5.1 Base Inertia ...............................................37 2.5.5.2 Inertia/Inertia Simulation .....................................38 2.5.6 Rolls ..............................................................39 2.5.7 Dynamometer Calibration ............................................39 2.5.7.1 Accuracy Over Operating Ambient Temperature Range .............39 2.5.7.2 Coast-Down Check .........................................40 2.5.7.3 Parasitic Losses ............................................41 2.5.8 Other Requirements .................................................42 2.5.8.1 Vehicle Restraint ...........................................42 2.5.8.2 Installation ................................................42 2.5.8.3 Load Measuring Device ......................................42 2.5.8.4 Automatic Lift .............................................42 2.5.8.5 Driver's Aid ...............................................42 2.5.8.6 Driver's Remote Control Device ...............................43 2.5.8.7 Fan ......................................................43 2.5.8.8 Augmented Braking .........................................43 2.5.8.9 Safety Provisions ...........................................43 2.5.8.10 Dynamometer Interface and Controller ..........................43 2.5.9 Certification Testing .................................................43 2.6 Cabinet & Peripheral Requirements ............................................45 Date: May 1, 2005 2.6.1 Power/Telephone Cord ...............................................46 2.6.2 Power Requirements .................................................46 2.6.3 Instrument Construction .............................................46 2.7 Bar Code Scanner ...........................................................47 2.8 Fuel Cap Tester .............................................................47 2.8.1 Equipment Specifications .............................................47 2.8.2. Fuel Cap Adapters ...................................................48 2.8.3 Pre-inspection and Preparation ........................................48 2.8.4 Fuel Cap Integrity Test Sequence ......................................48 2.8.5 Data Transmission (for External Cap Tester Only) ........................49 2.9 Engine RPM Detection .......................................................49 2.10 Accessing OBD II Fault Codes .................................................50 2.11 Testing Heavy-Duty Gasoline-Powered Vehicles ..................................50 2.12 Inspection Restrictions Based on Current Calibrations .............................50 3.0 DISPLAY PROMPTS AND PROGRAMMING CRITERIA REQUIREMENTS 1.0.a GENERAL - Two-Speed Idle (i.e., El Paso Analyzers) 1.1.a Design Goals ................................................................57 1.2.a Useful Life ..................................................................58 1.3.a Nameplate Data .............................................................58 1.4.a Manuals ....................................................................58 1.5.a Certification Documentation ...................................................59 1.6.a Warranty Coverage/Mandatory Service Contract .................................61 1.7.a Tampering Resistance ........................................................62 1.8.a Manufacturer Provided Services ...............................................64 1.9.a Certification Requirements ....................................................67 2.0.a CONSTRUCTION DESIGN 2.1.a Materials ...................................................................68 2.2.a Construction ................................................................68 2.3.a Mobility ....................................................................69 2.4.a Electrical Materials/Construction ..............................................69 2.5.a Sampling System ............................................................69 2.6.a Storage Temperature