LightWave Systems Video Game Controller Laser Diode Temperature Controller User Manual download pdf (Page 21)

LDT-5100 9

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CHAPTER 3

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CALIBRATION

Thermistor Current Source Calibration

To calibrate the thermistor current source, connect an ammeter in series with a 10

kΩ resistor at the output connector (J1).

1 Place the thermistor current jumper (J5) in the 100 µA position.

2 Adjust trim pot R51 to read 100.00 µA on the current meter.

3 Place the thermistor current jumper (J5) in the 10 µA position.

4 Adjust trim pot R50 to read 10.00 µA on the current meter.

TE Current Limit Calibration

To calibrate the ITE limit current, connect a fixed known load

(approximately 1.0 Ω / 25 Watt) at the TE output.

1 Set the current limit jumper to the 1 Amp position.

2 Set the resistor select jumper in the internal position.

3 Adjust trim pot R52 so that a negative I

current is produced.

4 Measure the voltage developed across the load with a voltmeter.

5 Adjust trim pot R5 so that the output current is 1.00 Amps.

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LightWave Systems Video Game Controller Laser Diode Temperature Controller User Manual Page 21