VOLTCRAFT MT-52 Bedienungsanleitung Seite 50

11.16 REL button
The REL button enables reference value measuring� The indicated measuring resistance can be reset to zero, e�g� to
avoid including the resistance of for measuring leads in low-ohmic measurements�
Every time it is pressed, the auto range function is deactivated (display "Auto" goes out) The symbol "REL" is dis-
played�
To turn the REL function off, press "REL"� To activate the autorange function, keep the "RANGE" button pressed for
approx� 2s� The display shows "Auto" again�
11.17 Hz% button
The Hz% button enables direct switching to the frequency display in voltage and current measuring areas� Press again
to switch to pulse measurement "%"� Press again to switch back to normal mode� Each press switches the function�
In the "Hz" measuring function, this button is used to switch to the pulse measurement "%"�
11.18 HOLD button
The HOLD button makes it possible to manually capture the currently measured value� When the function is active,
the display shows "HOLD"� Pressing the button again switches the function off again�
11.19 MODE button
The MODE button makes it possible to skip through subfunctions� Each press switches the function�
During current measurement (µA, mA, 10A), the device switches from AC (alternate current) to DC (direct cur-
rent)�
From resistance measurement, the device switches to diode measurement and acoustic continuity test�
11.20 Auto power-off function
The DMM turns off automatically after approx� 30 minutes if no button or rotary switch is operated� This function
protects the battery, saves battery power and extends the service life�
To reactivate the DMM after automatic shutdown, use the rotary switch or press any button (apart from the light button
(10))�
11.21 Display illumination
The display can be lit if you are working in a badly lit environment� To switch it on or off, press the " " (10) button in
measuring operation� Lighting remains on until it is deactivated manually or the DMM switches off automatically after
approx� 30 minutes�
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