E) Hz% Function, Frequency Measurement (Electrical); Hold Function; Display Illumination; H) Led Lamp - VOLTCRAFT VC-440 E Bedienungsanleitung

e) Hz% Function, Frequency Measurement (electrical)

The voltage and current measurement ranges are occupied with subfunctions for frequency measurement. These
measuring functions require a signal level of >200 mVrms 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.
Pulse Ratio "Hz%" Function
If you would like to display the ratio of the positive to the negative half wave in percent, push the button "Hz%" twice.
The display shows the ratio of the positive half-wave in percent. 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!
To switch on the Hold function, push the "HOLD" button; a signal sound confirms this command and "H" appears on
the display. The bar chart remains active and displays the voltage curve.
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
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.
i) Automatic Power-Off
The DMM turns off automatically after approx. 15 minutes if no button or rotary switch is operated. This function
protects the battery, saves battery power and extends the operating time. The active function is displayed with the
symbol " " in the display.
To reactivate the DMM after automatic deactivation:, use the dial switch or push any button (apart from the two lighting
buttons).
Automatic deactivation can be deactivate manually.
Switch off the meter (OFF). Keep the button "SELECT" depressed and Switch on the DMM at the rotary control. The
" " symbol is not visible. Automatic switching off remains inactive until the meter is turned off via the rotary control.
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and remains deactivated until switched off via the dial switch. This automatic function