Download USER`S MANUAL BM878, BM877 & BM876

4
4) OPERATION
CAUTION
Before and after hazardous voltage measurements, test the voltage function on a
known source such as line voltage to determine proper meter functioning.
ACV +Hz & VFD ACV +Hz functions
Press the SELECT button momentarily to toggle the subject functions. Last selection
will be saved as power up default for repeat measurement convenience. For ACV +Hz
function, press the RANGE button momentarily to select other ranges when needed.
For VFD ACV +Hz function, only 600V range is available to best cope with the range of
most Variable Frequency Drives (VFD) measurements.
To select DCV function, turn the Rotary Knob to DCV position for measurements.