a known source such as line voltage to determine proper meter functioning.
AutoV (LoZ) (Model 789 only)
Inputs are made via the test lead terminals V-COM. AutoV automatically selects
measurement function of DCV or ACV based on their input levels via the test leads.
The input also provides a low ramp-up impedance (LoZ) to drain ghost voltages.
◎
With no input, the meter displays “Auto” when it is ready.
◎
When a signal above the voltage threshold of 1V DC or AC up to the rated 1000V is
present, the meter displays the voltage value in appropriate DC or AC, whichever
larger in peak magnitude.
◎
Push-button features of only HOLD, AutoHold, EF and Backlight are available in
AutoV mode.
Note:
1) Ghost-voltage Buster: Ghost-voltages are unwanted stray signals coupled from
adjacent hard signals, which confuse common multimeter voltage measurements. The
AutoV mode provides low (ramp-up) input impedance (approx. 2.1kΩ at low voltage) to
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