User's Manual

OPERATION

Back Panel Controls and Connections

06_07 LDT-5525 13

CHAPTER 2

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Table 2.1 SENSOR SELECT Switch Positions

The 10 µA and 100 µA designations are for the current source level; thermistor

sensor type is implied. When using a thermistor, the supply current depends on

the thermistor operating temperature range and the required temperature

resolution. Guidelines for setting this switch are contained in Appendix B.

The AD590 sensor operates as a current source which is proportional to the

sensed temperature. The LM335 sensor operates as a voltage source which is

proportional to the sensed temperature. Both of these sensors are approximately

linear over their operating ranges. When they are used, the constants C1 and C2

are used for a two-point conversion. For more information on setting the constants

for use with these sensors, see Appendix C.

TEC Connector

At the right of center, when facing the back panel, you will find the 15-pin

D-connector for the TEC MODULE. This connector is used for the input and

output connections, as shown by the pin-out diagram of Figure 2.12.

Figure 2.3 Back Panel TEC Connector

SWITCH POSITION CODE

100 µA -01-

10 µA -02-

LM335 -03-

AD590 -04-

234

121314

1, 2 TE Module (+)

3, 4 TE Module (-)

5 TE Module Shield

6 Sensor Shield

7 Sensor (+)

8 Sensor (-)

9 Analog Ground

10 Control Signal

11 Voltage Limit

12 Current Limit

13 Temp. Limit

14 Booster Present

15 Digital Ground