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Teledyne API Model 100AH SO
2
Analyzer Instruction Manual, 02417, Rev. D
10.2.10 Non-Linear Response
Common causes are:
1. Leak in pneumatic system.
2. Calibration device in error - re-check flowrates and concentrations, especially at low
concentrations.
3. Contamination in sample delivery system:
A. Dirt in sample lines or reaction cell.
B. Dilution air contains sample or span gas.
C. Dirty particulate filter.
4. Back pressure on sample inlet.
10.2.11 Slow Response
1. Contaminated or dirty sample delivery pneumatics.
A. Dirty/plugged sample filter or sample lines.
B. Dirty reaction cell.
C. Check leak.
2. Flow rate too low.
3. Wrong materials in contact with sample - use glass or Teflon.
4. Insufficient time allowed for purging lines upstream of analyzer.
5. Insufficient time allowed for SO
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cal gas source to become stable or cal gas flow is too low.
10.2.12 Analog Output Doesn't Agree with Display Concentration
1. V/F board DAC's out of calibration. Do DAC calibration and Factory Calibration.
2. Analog outputs electrically loaded down causing voltage to sag. Could be due to input
impedance of chart recorder or data logger being too low or improper grounding.
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