8250A Optical Power Meter Operation Manual
APPENDIX
A-1
APPENDIX
A.1 Trouble Shooting (Before Asking for Repair)
If a problem occurs in this instrument, check the following table to solve the problem before asking ADC
CORPORATION for repair. If the problem persists after the relevant solution is performed, contact ADC
CORPORATION or a sales representative. Relevant contact information is listed at the end of the manual.
Note that repairing the following problems is also charged for.
Table A-1 Problem and Solution
No. Problem
Possible
cause
Solution
1
Key operation is disabled.
The key lock is set to ON.
Set the key lock to OFF by refer-
ring to 1 in 2.1.1, “Function
Description.”
2 The
display
remains
unchanged.
The HOLD function is enabled.
Disable the HOLD function by
referring to 6 in 2.1.1, “Function
Description.”
The MAX function is enabled.
Disable the MAX function by
referring to 13 in 2.1.1, “Function
Description.”
3
"OL" is displayed.
Input power is too high.
Reduce the input power.
The input power exceeds a value
allowed in the set manual range.
Set the auto range.
4
"Lo" is displayed.
The input power is too low in the dBm
unit display mode.
If the manual range is used, set the
range to the auto range.
5
"Err2" is displayed.
The sensor is disconnected.
Connect the sensor.
