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d) REL Function

The REL function allows a reference value measurement to avoid possible scatter displays or line loss as it occurs,

e.g., during impedance measurements. For this purpose, the current indicated value is set to zero. A new reference

value is set. Auto-range is deactivated.

Pressthe“REL”buttontoactivatethismeasuringfunction.Thedisplayindicates“Δ”.

Inordertoswitchoffthisfunction,pushthe“REL”buttonagainorchangethemeasurementfunction.

This additional function cannot be activated in the measuring function “Motor” and “Hz”.

e) Hz Function, frequency measurement (electrical)

The AC voltage and current measurement ranges are occupied with subfunctions for frequency measurement. These

measuring functions require a signal level of >30 Vrms and have a bandwidth of up to 400 Hz. They are therefore

suitable for mains voltage.

Tomeasurethefrequencyofthecurrentorvoltagesignal,pushthebutton“Hz”.Thedisplayshowsthefrequencyin

Hz.Toswitchthedisplay,pushthebutton“Hz”again.

f) HOLD Function

The Hold function keeps the currently indicated measured value in the displays to allow you to read or record it easily.

If you test live wires, make sure that this function is deactivated before the measurement starts.

Otherwise, the measurement will be incorrect!

This additional function cannot be activated in the measuring function “Motor”

ToswitchontheHoldfunction,pushthe“HOLD”button;asignalsoundconrmsthiscommandand“H”appearson

the display.

InordertoswitchofftheHoldfunction,pushthe“HOLD”buttonagainorchangethemeasurementfunction.

g) Display illumination

The multimeter automatically recognises the brightness in the environment via a light sensor and switches on display

lightingautomaticallywhentheDMMison.Thisautomaticfunctionisdisplayedbythesymbol“BL”.Itcanbedeacti-

vated via the lighting button and remains deactivated until switched off via the dial switch. This automatic function

is activated again at the next activation.

h) LED lamp

A white LED lamp (K) is integrated at the rear of the device. The lamp is switched on and off via the button with the

torch icon. Every push of a button will switch the lamp on or off again.

The lamp remains on until switched off manually via the button, until the meter is switched off via the dial switch (OFF)

or the device is deactivated automatically after approx. 15 minutes.

VOLTCRAFT VC-400 Series User Manual

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