Teledyne 100AH instruction manual Reaction Cell Temp, Preamp Board, 10-49

Models: 100AH

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Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D

10.3.6 Reaction Cell Temp

The reaction cell temperature is controlled by the CPU using advanced algorithm to control constant temperature. It operates by reading a thermistor amplifier on the 01086 Status/Temp board. First LED from the front indicates the control power on-off status which can be seen from the cover of the PSM through the slot. A warning message is often present during initial warm- up due to the temperature being below the 50.0°C set point.

10.3.7 Preamp Board

The Preamp Board is a multifunction board providing circuitry to support the following functions.

1.Preamp, buffer amplifier, physical range control hardware for the PMT detector.

2.Precision voltage reference and voltage generation, and control for the PMT - HVPS inside the sensor module.

3.Constant current generator and adjustment for the Optic Test LED.

4.Voltage generation and adjustment for Electric Test.

5.Thermistor amplifier and temperature control circuit for the PMT cooler.

The setup and adjustment of items 1-4 above is covered in the Factory Calibration procedure in Section 10.1.6. Item 5 (see Section 10.3.9) is not adjustable.

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Page 157
Image 157
Teledyne 100AH instruction manual Reaction Cell Temp, Preamp Board, 10-49