Burleigh WAVEMETER JR WA-2500, Operating Manual, Page: 26 / 47

Wavemeter
jr
Operating Manual 4. Maintenance and Service
Burleigh Instruments, Inc. (04659-M-00 Rev E) page 4-1
Burleigh Park, Fishers, NY 14453
4. MAINTENANCE AND SERVICE
Other than the procedures in this manual, user repairs and maintenance are not
recommended. If any problems arise, or if you have any questions, please contact
the Burleigh Customer Service Department.
WARNING: Always disconnect the AC line cord before removing the top cover and reconnect
power only as necessary for testing.
4.1 ERROR MESSAGES
The following error messages may appear on the front panel display and RS-232
interface.
Message Description
CAL Calibration of the Moiré interferometer gauge is in
process.
FAIL Attempted calibration process failed. Previous
calibration value remains stored in non-volatile memory.
Calibration requires a red HeNe laser input.
HI SIG Input laser power is too high.
LO SIG Input laser power is too low.
PLL Er Phase-locked loop error. Wavemeter
jr
must be placed on
a firm and stable horizontal surface. This error can be
caused by vibrations or perturbations to the internal
scan mechanism.
COH Er Coherence error of the laser under test. This error may
result from laser linewidths greater than 3000 GHz
(100 cm
-1
) or from lasers with large amplitude noise and
power drop out.
LOP Er Low power on the battery back-up for non-volatile
memory. This message will appear preceding the
countdown from 10 when power is first turned on. If this
message appears the memory chip should be replaced.
Please consult Burleigh for more information.
232Er Data transmission via the RS-232 interface has been
halted by a CTS line “false” or Xoff command. This
warning may also indicate an incorrect termination of
the RS-232 interface cable.
ALI Er Interferometer alignment error. Input laser power is
high but signal amplitude is too low because the
interferometer is misaligned. Refer to Section 3.11.
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