B&K Precision 879B - Manual - Manual (Page 55)

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2. Either open or short calibration is not
associated with measurement function,
therefore changing the test function does not
require re-calibration.
3. Re-calibration may be necessary depending
on many factors such as prolonged use,
changing environments, and contact variation
(i.e. alligator test leads or socket contacts).
USB
The USB button (or for model 878B) are
used for remote communication. See “REMOTE
COMMUNICATION” section for details.
Automatic Fuse Detection
The LCR meter has an internal fuse that protects the
inputs from severely damaging the instrument. When
the meter detects that the protective fuse is open, the
“ FUSE” indicator will appear on the primary display
(see Figure 9) and an internal “beep” will sound
continuously. In this situation, none of the function
buttons can be operated and all other meter functions
will be disabled.