EXFO PPM-350C PON Power Meter - Manual (Page 34)

Maintenance 28
To view the last calibration date:
1. Press and hold down
and press at the
same time. The unit displays the main embedded
software version.
2. Press to display the calibration date of the unit.
3. Press to return to your previous mode.
Verifying the Integrity of User Information in
Memory
You can verify the integrity of the memory to ensure that your unit will function
normally for threshold sets, correction factors, wavelength lists and storage
information.
If a problem is detected, error code 9, 10, or 12 will be displayed. If you turn the unit
off without correcting the problem, the error code will be displayed once the unit is
turned on again. For more information, see Error Codes and Descriptions on
page 31.
To verify memory integrity:
Hold down
and a few seconds. The
unit displays CHKS and vertical bars move at the top of
the display, indicating the verification is in progress.
Note: Keypad is disabled during this operation.
The unit will then return to your previous mode.
Year Month/Day
Threshold/
 
Next
P/F
mode
Threshold/
 