Clamp Meter
Power
11
Maintenance Mode
In Maintenance Mode you can check:
• LCD segments
•Firmware version
• Battery status annunciators
• Fluke Connect LED
• Backlight
To enter Maintenance Mode:
1. Turn off the Clamp.
2. Push and hold
e as you turn the control knob to V.
The Clamp goes into the option mode.
3. Push B until nmAt nm0d shows on the display.
All LCD segments turn on and the backlight turns off.
4. Release e.
All LCD segments continue to show on the display.
5. Press
e again to show the firmware version.
6. Continue to press e to cycle through:
• Empty battery annunciator
• 25 % battery annunciator
• 50 % battery annunciator
• 75% battery annunciator
• Blue LED + live battery annunciator (for FC model only,
step is skipped for non-FC model)
• White backlight + live battery annunciator
• Green backlight + live battery annunciator
7. Press
e again to show CAL on the display.
For more information about calibration, see the
377/377 FC/378/378 FC Calibration Manual.
8. Press
e again to loop back to show all LCD segments
(step 4).
To exit Maintenance Mode at any time, turn off the Meter.
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