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19.8. Zero function
The multimeter has a zeroing function. It can be activated after the measurement was activated by pressing
INPUT direct control button. Zeroing is performed by pressing METER direct control button. After the button is
pressed, most recent value is stored and subtracted from all ongoing measured values. A “Zero” message
appears on the right side of the display, indicating that this function is active. Press METER a second time to
deactivate the Zeroing function.
Multimeter’s menu can be entered only after the measurement is terminated by pressing INPUT button.
Zeroing function can be used e.g. to compensate the voltage drops at the cables, to suppress any remanent
value of the signal etc.
Notes:
* The current inputs of the multimeter are protected from current overloading by a fuse located in 140-
41 cable adapter. The fuse can be replaced after turning the cap of the fuse holder. The procedure is
described in the adapter’s manual.
* The multimeter can be used as a DC milivoltmeter with 20 mV, 200 mV, 2 V, 10 V ranges. The
appropriate input terminals are PTHU and PTLU.
* Maximum allowed voltage on the input terminals against ground terminal is 20 V.
* Frequency measurement is possible up to 15 kHz. Input signal must be within 0.2 to 5 V range.
squarewave or pulse shape of the input signal is expected.
Overloading can damage the multimeter.
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