General Operation - ILX Lightwave LDT-5416 User Manual

General Operation

1. Plug the LDT-5416 into an AC power source within the specified range of the instrument.
2. Turn on the LDT-5416 by pressing and releasing the power switch to latch it to the on
position. The output will be disabled at power up and the unit display mode will power up in
the same mode which existed when the power was last shut off
3. Set the maximum current for the TE module by adjusting the I LIMIT control.
4. Set the rear panel THERMISTOR MODE switch to an acceptable current for your sensor. If
using a 10k thermistor you can use the °C LINEARIZED FOR 10k mode to display and
control temperature.
5. For front panel setpoint control, ensure the SET RESISTANCE switch on the rear panel is set
to the INT position. Press the DISPLAY MODE button until SET is illuminated. Adjust the
setpoint on the display using the large setpoint knob.
For fixed external control, ensure the SET RESISTANCE switch on the rear panel is set to
EXT and an external resistor is connected between pin 5 and 6 of the OUTPUT connector.
The setpoint resistance can be verified on the front panel by pressing the DISPLAY MODE
button until SET is illuminated.
6. Ensure that the TE module and thermistor are connected to the OUTPUT connector and turn
the OUTPUT on. The indicator above the ON button will illuminate when the output is on.
7. Press the DISPLAY MODE button until ACTUAL is illuminated to monitor the sensor
resistance/temperature. If the resistance does not settle at the set point, but instead oscillates
by more than one significant digit around the setpoint, turn the GAIN control adjustment on
the rear panel counter-clockwise to decrease the gain. Alternatively if it is taking a long time to
get to the setpoint, the GAIN control can be adjusted clockwise to increase the gain.
8. TE current can be monitored at any point during operation by pressing the DISPLAY MODE
button until TE CURRENT is illuminated.
November 2016 13 LDT-5416