VOLTCRAFT VC 820-1 Notice D'emploi page 26

The reference value measurement is not possible for frequency and pulse-pause
ratio measurements. As the „AUTO" range is turned off for the reference value mea-
surement, you have to select the desired measuring range manually before using this
special function. After leaving this extra function, press the „RANGE" button once
and keep it pressed for longer than 1s to return to the automatic range selection
mode.
Example:
Proceed as follows to set the reference value:
Set the desired measuring range (via the RANGE button). Measure the required ref-
erence value, e.g. a direct voltage of 12VDC. Press the "REL" button once. If the
measuring prods are now disconnected from the voltage source, the value „DC -
12V" will be indicated in the main display.
B 4 HOLD
The „HOLD H" button is to be activated once, if you want to keep a test certificate for
example and want to record the current measuring value before it will change again.
By pressing the „HOLD" button the current value is „frozen" or kept. The „H" symbol
in the header of the display is marked by a black background.
If you want to release the running measurement anew, activate the „HOLD H" button
once again. The currently measured value will be displayed.
B 5 POWER (round)
The „POWER" switch is used to switch the measuring instrument on and off.
B 6 second-function button (blue)
The second-function button is positioned top right of the rotary switch and is used to
turn on/off the blue-described measuring functions around the rotary switch. For
resistance measurements (ohm), each push on the button switches between the
diode test „ ", the continuity check „
current and voltage measurements this button is used to change between direct (DC)
and alternating (AC) quantities.
B 7 rotary switch
The rotary switch sets the diverse measuring functions.
Warning!
The measurement function switch may never be reset in the course
of measurement, because this action could damage the measuring
instrument (breaking sparks) and consequently cause grave danger
for you if the voltages exceed 25VACrms or 35VDC.
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" and the resistance measurement. For