Troubleshooting; Table 6.1 Symptoms And Corrective Actions - ILX Lightwave LDX-36000 Series User Manual

Troubleshooting

This section is a guide to troubleshooting the LDX-36000 Series High Power
Current Sources. Some of the more common symptoms are listed here, and the
appropriate troubleshooting actions are given. It is recommended that
troubleshooting begin at the top of the list and work toward the bottom. Read the
symptom descriptions, and follow the steps for corrective action which apply. If
problems are encountered beyond this list, contact ILX Lightwave Customer
Service for additional support.

Table 6.1 Symptoms and Corrective Actions

Symptom
LDX-36000 will not power up.
Power on, but display is frozen;
buttons do not operate.
Power on, but no output.
Temperature cannot be displayed or
measurement is incorrect.
Output goes off intermittently.
Unable to adjust output.
No output in optical power mode, even
though front panel indicates the laser
should be outputting light.
Laser is outputting light even though
front panel says it should be below
threshold.
Output exceeds displayed power.
Voltage Limit indicator blinks.
03_10
C A L I B R A T I O N A N D T R O U B L E S H O O T I N G
Corrective Actions
Check AC power line voltage, power cord connection and
fuse.
This may occur if the instrument loses power (AC line)
briefly. Turn power switch off and back on to restart.
Verify instrument is not in Remote mode by pressing Local
button and then try to change display mode.
Verify interlocks are satisfied, output cable is securely
connected to output connector and connections to laser are
secure.
Verify Steinhart-Hart constants have been set to non-zero
values and are appropriate for the thermistor being used.
Verify interlock connections. An intermittent interlock will
disable output.
Check to make sure AC power cord connection is secure.
Power line drop-outs may reset the instrument and when
power is restored. Output will remain disabled.
Verify that the current annunciator A is flashing. When it is
flashing, the current or optical power (via current) may be
adjusted.
Verify the current limit is set greater than zero.
Verify the correct values for threshold and slope efficiency
have been entered. check by observing the values stored
for the parameter Cal P. Output current is determined by
back-calculating from the displayed power and the stored
values for threshold and slope efficiency.
This indicates a voltage limit error. Check laser
connections. A high impendance may cause this condition,
especially at high current levels.
Troubleshooting
LDX-36000 Series
6
C H A P T E R
133
