TAI Model 6200A SO
2
Analyzer Operator Manual, 02164, Rev. G
9.3.7 Reaction Cell Temp
The reaction cell temperature is controlled by the CPU. 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.
9.3.8 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 9.1.6. Item 5 (see Section 9.3.9) is not adjustable.
9.3.9 PMT Cooler
The PMT cooler uses a Thermal Electric Cooler (TEC) supplied with DC current from the
switching power supply in the Power Supply Module. An overall view is shown in Figure 9-9.
The temperature is controlled by a temperature controller circuit located on the Preamp board.
Voltages applied to the cooler element vary from 0.1 to 12VDC. The input voltage from the
supply is 15VDC and LED indicates the presence of the voltage. Typical control voltage to the
FET is about 4.0 VDC when PMT temperature is at the 7
o
C setpoint. At normal room
temperatures the 7
o
C set point should be maintained within 0.1
o
C. These voltages can be
measured from the PCB mounted in the fan shroud. TP1 and TP4 (white) should measure
15VDC and the control voltage to the gate of the FET can be measured between pin 2 of the
white plug and TP4. Also under normal room temperature and at the 7
o
C PMT set point the
voltage between TP2 and TP3 will typically measure between 0.15V- 0.2V which translates to
about 1.5-2 Amp DC current flowing through the Thermal Electric Cooler (TEC). Following
procedures show how to replace the TEC assembly.
9-53
Summary of Contents for 6200A
Page 9: ...TAI Thermal Converter Operator Manual Page 5 FIGURE 2 1 BASIC CONFIGURATION ...
Page 10: ...TAI Thermal Converter Operator Manual Page 6 FIGURE 2 2 WITH IZS OPTION ...
Page 11: ...TAI Thermal Converter Operator Manual Page 7 FIGURE 2 3 WITH M702 CALIBRATOR OPTION ...
Page 13: ...TAI Thermal Converter Operator Manual Page 9 FIGURE 2 4 TRS CONVERTER LAYOUT ...
Page 15: ...TAI Thermal Converter Operator Manual Page 11 FIGURE 2 5 PNEUMATIC CONNECTIONS ...
Page 22: ...TAI Thermal Converter Operator Manual Page 18 FIGURE 3 1 TRS WIRING DIAGRAM ...
Page 25: ...TAI Thermal Converter Operator Manual Page 21 FIGURE 4 1 DILUTER FLOW BLOCK ASSEMBLY ...
Page 27: ......
Page 35: ......
Page 41: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 2 2 Rear Panel 2 4 ...
Page 47: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 2 4 Front Panel 2 10 ...
Page 48: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 2 5 Assembly Layout 2 11 ...
Page 51: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G INTENTIONALLY BLANK 2 14 ...
Page 65: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 5 2 Setup Menu Tree 5 2 ...
Page 107: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G INTENTIONALLY BLANK 6 26 ...
Page 140: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 8 2 Reaction Cell 8 7 ...
Page 141: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 8 3 Pneumatic Diagram 8 8 ...
Page 193: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 9 6 Flow Pressure Sensor 9 50 ...
Page 194: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 9 7 SO2 Sensor Module 9 51 ...
Page 195: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 9 8 SO2 Sensor Module 9 52 ...
Page 198: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 9 9 PMT Cooler Subsystem 9 55 ...
Page 204: ...TAI Model 6200A SO2 Analyzer Operator Manual 02164 Rev G Figure 9 11 Kicker Leak Check 9 61 ...
