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Model 360E Instruction Manual M360E Documentation
6.13.8. Flow Calibration..................................................................................................................................................120
6.13.9. Test Channel Output...........................................................................................................................................121
6.14. SETUP MORE ALRM: Using the Gas Concentration Alarms.............................................................................122
6.14.1. Setting the Concentration Alarm Limits...............................................................................................................122
6.15. Remote Operation of the Analyzer .............................................................................................................................123
6.15.1. Remote Operation Using the External Digital I/O................................................................................................123
6.15.1.1. Status Outputs ............................................................................................................................................123
6.15.1.2. Control Inputs..............................................................................................................................................125
6.15.2. Remote Operation Using the External Serial I/O ................................................................................................126
6.15.2.1. Terminal Operating Modes..........................................................................................................................126
6.15.2.2. Help Commands in Terminal Mode.............................................................................................................126
6.15.2.3. Command Syntax .......................................................................................................................................127
6.15.2.4. Data Types..................................................................................................................................................127
6.15.2.5. Status Reporting .........................................................................................................................................128
6.15.2.6. Remote Access by Modem.........................................................................................................................129
6.15.2.7. COM Port Password Security .....................................................................................................................130
6.15.2.8. APICOM Remote Control Program.............................................................................................................131
6.15.3. Additional Communications Documentation .......................................................................................................131
6.15.4. Using the M360E with a Hessen Protocol Network.............................................................................................132
6.15.4.1. General Overview of Hessen Protocol........................................................................................................132
6.15.4.2. Hessen COMM Port Configuration..............................................................................................................132
6.15.4.3. Activating Hessen Protocol .........................................................................................................................133
6.15.4.4. Selecting a Hessen Protocol Type..............................................................................................................133
6.15.4.5. Setting The Hessen Protocol Response Mode ...........................................................................................134
6.15.4.6. Hessen Protocol Gas ID..............................................................................................................................134
6.15.4.7. Setting Hessen Protocol Status Flags.........................................................................................................135
6.15.4.8. Instrument ID Code.....................................................................................................................................136
7. CALIBRATION PROCEDURES ..........................................................................................................................................137
7.1. Before Calibration.........................................................................................................................................................137
7.1.1. Zero Air and Span Gas.........................................................................................................................................137
7.1.2. Calibration Gas Traceability..................................................................................................................................138
7.1.3. Data Recording Devices.......................................................................................................................................138
7.2. Manual Calibration without Zero/Span Valves..............................................................................................................138
7.3. Manual Calibration Checks...........................................................................................................................................141
7.4. Manual Calibration with Zero/Span Valves...................................................................................................................141
7.5. Manual Calibration Checks with Zero/Span Valves......................................................................................................146
7.5.1. Zero/Span Calibration on Auto Range or Dual Ranges ........................................................................................147
7.5.2. Use of Zero/Span Valves with Remote Contact Closure ......................................................................................148
7.6. Automatic Zero/Span Cal/Check (AutoCal) ..................................................................................................................148
7.6.1. AutoCal with Auto or Dual Reporting Ranges Modes Selected ............................................................................151
7.7. Calibration Quality........................................................................................................................................................151
8. EPA PROTOCOL CALIBRATION.......................................................................................................................................153
9. MAINTENANCE SCHEDULE & PROCEDURES ................................................................................................................155
9.1. Maintenance Schedule.................................................................................................................................................155
9.2. Predicting Failures Using the Test Functions ...............................................................................................................158
9.3. Maintenance Procedures..............................................................................................................................................159
9.3.1. Replacing the Sample Particulate Filter................................................................................................................159
9.3.2. Rebuilding the Sample Pump ...............................................................................................................................159
9.3.3. Performing Leak Checks ......................................................................................................................................160
9.3.3.1. Vacuum Leak Check and Pump Check ........................................................................................................160
9.3.3.2. Pressure Leak Check....................................................................................................................................160
9.3.4. Performing a Sample Flow Check ........................................................................................................................161
9.3.5. Cleaning the Optical Bench ..................................................................................................................................161
9.3.6. Cleaning Exterior Surfaces of the M360E.............................................................................................................161
10. THEORY OF OPERATION................................................................................................................................................163
10.1. Measurement Method.................................................................................................................................................163
10.1.1. Beer’s Law..........................................................................................................................................................163
10.1.2. Measurement Fundamentals..............................................................................................................................163
10.1.3. Gas Filter Correlation..........................................................................................................................................164
10.1.3.1. The GFC Wheel..........................................................................................................................................164
10.1.3.2. The Measure Reference Ratio....................................................................................................................165
10.1.4. Interference and Signal to Noise Rejection.........................................................................................................166
10.1.4.1. Ambient CO
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Interference Rejection...........................................................................................................167
10.2. Pneumatic Operation..................................................................................................................................................168
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