Resistance Mode Operation - ILX Lightwave LDT-5500B Series User Manual

2
C H A P T E R

Resistance Mode Operation

16
 LDT-5500B Series
O P E R A T I O N
General Operating Procedures
a Plug the LDT-5500B Series 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-5500B Series Temperature Controller. The OUTPUT stage will be
disabled at power up and the unit will automatically configure its parameters to the
state which existed when the power was last shut off.
c If the ENABLE indicator on the front panel is not lit, press the ENABLE switch so the
indicator is lit (adjustment enabled). Press the mode SELECT switch until R mode is
selected.
Check the setting of the SENSOR SELECT switch for the desired operation (10 A or
d
100 A). The sensor code will be displayed for two seconds during the power-up
sequence.
e Press the parameter SELECT switch and check the values of I LIMIT, T LIMIT, GAIN,
and CONST to ensure that they are adequate for the thermal load connected to the
controller.
f Use the ADJUST knob to change the resistance set point until the desired value is
displayed.
g Enable the TEC output by pressing the OUTPUT ON switch. The unit will
automatically control the thermal load to the set point resistance. 

If the exact resistance is unknown (to control to a desired temperature), press the
DISPLAY switch to view the measured temperature. Readjust the resistance set
point and recheck the temperature until the desired result is attained.
h When the unit is powered off, the state of the unit at power-down is saved in non-
volatile memory.