Lightwave Communications LDT-5525 manual General Operating Procedures, Temperature Mode Operation

O P E R A T I O N

General Operating Procedures

General Operating Procedures

C H A P T E R 2

The following sections present some guidelines for operation, as well as some common operating procedures.

Warm-Up and Environmental Considerations

Operate the LDT-5525 Temperature Controller at an ambient temperature in the range of 0 to +40°C. Storage temperatures should be in the range of -40 to +70°C. To achieve rated accuracy, let the LDT-5525 Temperature Controller warm up for about 1 hour before use.

Temperature Mode Operation

You can operate the LDT-5525 Temperature Controller in several modes, constant current (I TE), constant thermistor resistance (R), or constant temperature (T). This example is for constant temperature (T) mode.

aPlug the LDT-5525 Temperature Controller into an AC power source supplying the correct voltage and frequency for your unit (refer to the back panel for the correct ratings).

bTurn on the LDT-5525 Temperature Controller. The OUTPUT stage will be off at power up and the unit will automatically configure its parameters to the state which existed when the power was last shut off.

cPress the ENBL switch in the ADJUST section of the front panel so that the indicator is lit (adjustment enabled). Press the MODE switch until the T mode is selected.

dCheck the setting of the SENSOR SELECT switch for the desired operation. The sensor code will be displayed for two seconds during the power-up sequence.

ePress the PARAMETER switch and check the setting of I LIMIT, T LIMIT, and GAIN. Press the CAL switch and check the setting of C1 and C2 to insure that they are compatible with the equipment you are using. Refer to Section 2.4.5 if you need to change them.

fPress the DISPLAY switch until the VIEW SET indicator is lit and check the set point temperature. If it requires changing, turn the knob until the desired value is displayed.

Note: In some cases, a greater than 0.1oC temperature set point resolution may be attained by using R mode with the appropriate resistance value.

gTurn the TEC output on by pressing the OUTPUT ON switch. The unit will automatically control the temperature to the set point.

hWhen the unit is powered off, the state of the unit at power-down is saved in non- volatile memory.

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