Resistance Mode Operation - ILX Lightwave LDT-5525 User Manual

e. Press 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.
f. Press 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 0.1 °C temperature set point resolution may be attained by using R
mode with the appropriate resistance value (see Section 2.6.3).
g. Turn the TEC output on by pressing the OUTPUT ON switch. The unit will automatically control the
temperature to the set point.
h. When the unit is powered off, the state of the unit at power-down is saved in non-volatile memory.

2.6.3 Resistance 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 resistance (R) mode.
a. Plug 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).
b. Turn 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.
c. Press 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 R mode is selected.
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