ILX Lightwave Temperature Controller LDT-5525 User Manual page 40

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C H A P T E R

Unable to adjust output or

parameter

Unable to switch DISPLAY,

MODE, SENSOR CAL or

PARAMETER modes

Output goes off intermittently

R Mode set point is not saved

LDT-5525

M A I N T E N A N C E A N D T R O U B L E S H O O T I N G

Troubleshooting

Check the ADJUST ENBL switch; the indicator must be lit for any

adjustments to be made

Check the MODE or DISPLAY switch; if they do not respond, the

unit may be in measurement calibration mode (see Chapter 3);

press the OUTPUT switch to abort this mode.

The unit may be in measurement calibration mode (see Chapter

3); press the OUTPUT switch to abort this mode

Check that the AC power cord connection is secure; power line

drop outs may reset the unit and when the power is restored, the

output will be off

Check the TE module connections; a high impendance on the TE

load may cause the output to exceed the compliance voltage

momentarily, thus shutting the output off

The R mode set point value is not independent from the T mode

set point value; if the control mode is changed from R mode to T

mode, the R set value will change to a value which corresponds to

the temperature, based on C1 and C2

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Troubleshooting