Teledyne GFC-7001E - Trace CO Analyzer User Manual
Page 13
Table of Contents
Model GFC7001E Carbon Dioxide Analyzer
Teledyne Analytical Instruments
13
9.7. Calibration of Optional Sensors ..................................................................................................................209
9.7.1. O
2
Sensor Calibration Procedure .........................................................................................................209
9.7.1.1. O
2
Calibration Setup .....................................................................................................................209
9.7.1.2. Set O
2
Span Gas Concentration...................................................................................................210
9.7.1.3. Activate O
2
Sensor Stability Function ...........................................................................................211
9.7.1.4. O
2
ZERO/SPAN CALIBRATION ....................................................................................................212
9.7.2. CO
2
Sensor Calibration Procedure ......................................................................................................213
9.7.2.1. CO
2
Calibration Setup ..................................................................................................................213
9.7.2.2. Set CO
2
Span Gas Concentration: ...............................................................................................213
9.7.2.3. Activate CO
2
Sensor Stability Function ........................................................................................214
9.7.2.4. CO
2
Zero/Span Calibration ...........................................................................................................215
10. EPA CALIBRATION PROTOCOL ................................................................................. 217
10.1. Calibration Requirements ..........................................................................................................................217
10.1.1. Calibration of Equipment - General Guidelines .................................................................................217
10.1.2. Calibration Equipment, Supplies, and Expendables ..........................................................................218
10.1.2.1. Data Recording Device...............................................................................................................218
10.1.2.2. Spare Parts and Expendable Supplies .......................................................................................218
10.1.3. Recommended Standards for Establishing Traceability ....................................................................219
10.1.4. Calibration Frequency ........................................................................................................................220
10.1.5. Level 1 Calibrations versus Level 2 Checks ......................................................................................220
10.2. ZERO and SPAN Checks .........................................................................................................................221
10.2.1. Zero/Span Check Procedures ...........................................................................................................222
10.2.2. Precision Check .................................................................................................................................222
10.3. Precisions Calibration ...............................................................................................................................222
10.3.1. Precision Calibration Procedures ......................................................................................................223
10.4. Auditing Procedure ....................................................................................................................................223
10.4.1. Calibration Audit .................................................................................................................................223
10.4.2. Data Reduction Audit .........................................................................................................................223
10.4.3. System Audit/Validation .....................................................................................................................224
10.5. Dynamic Multipoint Calibration Procedure ................................................................................................224
10.5.1. Linearity test .......................................................................................................................................224
10.6. References ................................................................................................................................................226
PART III – TECHNICAL INFORMATION ............................................................................. 227
11. THEORY OF OPERATION ............................................................................................ 229
11.1. Measurement Method ...............................................................................................................................229
11.1.1. Beer’s Law .........................................................................................................................................229
11.2. Measurement Fundamentals ....................................................................................................................229
11.2.1. Gas Filter Correlation .........................................................................................................................230
11.2.1.1. The GFC Wheel ..........................................................................................................................231
11.2.1.2. The Measure Reference Ratio ...................................................................................................232
11.2.1.3. Summary Interference Rejection ................................................................................................233
11.3. Pneumatic Operation ................................................................................................................................234
11.4. Flow Rate Control .....................................................................................................................................235
11.4.1.1. Critical Flow Orifice .....................................................................................................................235
11.4.2. Particulate Filter .................................................................................................................................236
11.4.3. Pneumatic Sensors ............................................................................................................................236
11.4.3.1. Sample Pressure Sensor ...........................................................................................................236
11.4.3.2. Sample Flow Sensor ..................................................................................................................236
11.5. Electronic Operation ..................................................................................................................................237
11.5.1. Overview ............................................................................................................................................237
11.5.2. Central Processing Unit (CPU) ..........................................................................................................239
11.5.3. Optical Bench & GFC Wheel .............................................................................................................240
11.5.3.1. Temperature Control ..................................................................................................................240
11.5.3.2. IR Source ....................................................................................................................................240
11.5.3.3. GFC Wheel .................................................................................................................................240
11.5.3.4. IR Photo-Detector .......................................................................................................................242
11.5.4. Synchronous Demodulator (Sync/Demod) Assembly .......................................................................242