Operating Instructions; Connecting To Your Device; General Operating Procedure - ILX Lightwave LDT-5412 User Manual

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C H A P T E R

Operating Instructions

The following sections contain instructions on the set-up and operation of the
LDT-5412.

Connecting to Your Device

When connecting or disconnecting laser diode modules and other sensitive
devices to your 5412, we recommend that the OUTPUT be turned off (LED unlit).
Before turning the OUTPUT on, adjust the LIMIT control. If in doubt, refer to the
manufacturer's specifications. (For example, many commercial thermoelectric
modules in DIL package laser diodes should not be continuously driven over 1000
mA).

General Operating Procedure

The following steps outline the operating procedure of the 5412.
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 LDT-5412
O P E R A T I O N
Operating Instructions
Connect the 5412 to AC power and turn the POWER switch on (in).
Set the maximum current for the TE module by adjusting the 5412's LIMIT control.
Set the DISPLAY MODE switch to the SET R position and adjust the Main Control Knob
until the display reads the desired resistance. Be sure that the SET RESISTANCE switch
is in the INT position.
Or, connect the external set resistor to J301 pins 5 and 6 and put the SET RESISTANCE
switch in the EXT position. This method bypasses the front panel SET R mode.
Adjust the GAIN control fully clockwise (CW) for maximum gain. Set the THERMISTOR
CURRENT to 10 or 100 uA, depending on the desired temperature control range.
Connect the TE module and thermistor to the TE OUTPUT connector (J301) and turn the
OUTPUT on (LED lit).
Set the DISPLAY MODE switch to the ACTUAL R position and monitor the resistance on
the display. If the resistance value does not settle at the set point value, but instead
oscillates by more than one significant digit around the set point, turn the GAIN control
slightly counter-clockwise (CCW) until the resistance value settles in.
To check the TE current at any time during operation, set the DISPLAY MODE switch to
the TE CURRENT position.
To reset the resistance (temperature), repeat Steps 3 - 6 (the GAIN control may not need
re-adjustment).