METREL MD 9020 - Page 11

MD 9020 Electrical & Electronic DMM Operation
11
CAUTION
When measuring a 3-phase system, special attention should be taken to the phase-to-
phase voltage which is significantly higher than the phase-to-earth voltage. To avoid
exceeding the voltage rating of the protection fuse(s) accidentally, always consider the
phase-to-phase voltage as the working voltage for the protection fuse(s).
Beep-Jack™ Input Warning
The meter beeps to warn the user against possible damage to the meter due to
improper connections to the A, mA, or A input jacks when other function (like voltage
function) is selected.