Teledyne GFC7000E instruction manual - page 5

Model GFC7000E Instruction Manual GFC7000E Documentation
04584 Rev A1 iv
6.13.1.2. Control Inputs...................................................................................................... 116
6.13.2. Remote Operation Using the External Serial I/O...............................................................117
6.13.2.1. Terminal Operating Modes......................................................................................117
6.13.2.2. Help Commands in Terminal Mode...........................................................................118
6.13.2.3. Command Syntax .................................................................................................118
6.13.2.4. Data Types.......................................................................................................... 119
6.13.2.5. Status Reporting...................................................................................................120
6.13.2.6. Remote Access by Modem...................................................................................... 120
6.13.2.7. COM Port Password Security................................................................................... 122
6.13.2.8. APICOM Remote Control Program............................................................................ 122
6.13.3. Additional Communications Documentation..................................................................... 123
6.13.4. Using the MGFC7000E with a Hessen Protocol Network..................................................... 123
6.13.4.1. General Overview of Hessen Protocol....................................................................... 123
6.13.4.2. Hessen COMM Port Configuration ............................................................................ 124
6.13.4.3. Activating Hessen Protocol ..................................................................................... 124
6.13.4.4. Selecting a Hessen Protocol Type............................................................................ 125
6.13.4.5. Setting The Hessen Protocol Response Mode............................................................. 126
6.13.4.6. Hessen Protocol Gas ID..........................................................................................126
6.13.4.7. Setting Hessen Protocol Status Flags....................................................................... 127
6.13.4.8. Instrument ID Code ..............................................................................................128
7. CALIBRATION PROCEDURES.................................................................................................... 129
7.1. Before Calibration................................................................................................................129
7.1.1. Zero Air and Span Gas...................................................................................................129
7.1.2. Calibration Gas Traceability............................................................................................ 130
7.1.3. Data Recording Devices................................................................................................. 130
7.2. Manual Calibration without Zero/Span Valves.......................................................................... 130
7.3. Manual Calibration Checks.................................................................................................... 133
7.4. Manual Calibration with Zero/Span Valves...............................................................................133
7.5. Manual Calibration Checks with Zero/Span Valves.................................................................... 137
7.5.1. Zero/Span Calibration on Auto Range or Dual Ranges.........................................................137
7.5.2. Use of Zero/Span Valves with Remote Contact Closure....................................................... 138
7.6. Automatic Zero/Span Cal/Check (AutoCal).............................................................................. 139
7.6.1. AutoCal with Auto or Dual Reporting Ranges Modes Selected...............................................142
7.7. Calibration Quality............................................................................................................... 142
8. EPA PROTOCOL CALIBRATION................................................................................................. 143
9. MAINTENANCE SCHEDULE & PROCEDURES.............................................................................. 145
9.1. Maintenance Schedule..........................................................................................................145
9.2. Predicting Failures Using the Test Functions............................................................................ 148
9.3. Maintenance Procedures....................................................................................................... 148
9.3.1. Replacing the Sample Particulate Filter.............................................................................149
9.3.2. Rebuilding the Sample Pump.......................................................................................... 150
9.3.3. Performing Leak Checks................................................................................................. 150
9.3.3.1. Vacuum Leak Check and Pump Check........................................................................ 150
9.3.3.2. Pressure Leak Check............................................................................................... 150
9.3.4. Performing a Sample Flow Check.....................................................................................151
9.3.5. Cleaning the Optical Bench............................................................................................. 151
9.3.6. Cleaning Exterior Surfaces of the MGFC7000E................................................................... 151
10. THEORY OF OPERATION......................................................................................................... 153
10.1. Measurement Method......................................................................................................... 153
10.1.1. Beer’s Law .................................................................................................................153
10.1.2. Measurement Fundamentals ......................................................................................... 154
10.1.3. Gas Filter Correlation................................................................................................... 154
10.1.4. Ambient CO2 Interference Rejection............................................................................... 158
10.2. Pneumatic Operation.......................................................................................................... 158
10.2.1. Sample Gas Flow.........................................................................................................159
10.2.1.1. Critical Flow Orifice ...............................................................................................159
10.2.1.2. Sample Pressure Sensor........................................................................................ 160
10.2.1.3. Sample Flow Sensor.............................................................................................. 160
10.2.1.4. Valve Options....................................................................................................... 161
10.2.2. Purge Gas Pressure and Flow Control ............................................................................. 161