Teledyne 200AH Manual

A SERVICE OF

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Teledyne API Model 200AH NO

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Analyzer Instruction Manual, 06492, Rev. G2

9-59

9.3.8.4. PMT Cooler

The PMT cooler uses a Peltier cooler supplied with DC current from the switching power supply

in the Power Supply Module. An overall view is shown in Figure 9-11. The temperature is

controlled by a proportional temperature controller located on the Preamp board. The input

voltage from the supply is 15 VDC. Typical current through the cooler at room temp is about 1.5

to 2 A. At normal room temperatures the 7C set point should be maintained within 0.1C. The

current and voltage can be measured at test points on the fan shroud at one end of the NO

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sensor module. See the Schematic in the Appendix.