Fluke PN 643657 instruction sheet ∙Check, Disable and re-enable VCheck

WV∙Check

If a dc or ac voltage greater than about 4.5V is present across the inputs when the meter is set to R, G, or e, the meter switches automatically to dc or ac voltage mode (V∙Check mode).

WWarning

Repetitive transients on a dc bus will cause V∙Check to select ac volts, even though a hazardous dc voltage may be present. To avoid a misleading display and possible electric shock, manually select the proper volts function for measurements on these circuits.

When V∙Check is activated, the meter has low input impedance (LoZ) ≅2 kΩ. This load can alter the voltages in electronic control circuits. Do not use V∙Check to measure voltage in circuits that could be damaged by a 2 kΩ load.

Hint: V∙Check can be effectively used to eliminate “ghost” voltages.

16 MULTIMETER	If AC detected
	If DC detected

Meter puts 2 kΩ load on circuit.

OFF	V•Check
	A
CAT	TEMPERATURE

600V

COM +

or

Disable and re-enable V•Check

For , and Ω , Disables V•Check and locks meter in selected mode.

2 sec

or

Re-enables

orV•Check

ip09i.eps