8
EN
digital multimeter BE49
Undefined displays
If measuring inputs are open or touched by hand, this can lead
to undefined displays. This is not a malfunction but a reaction of
the sensitive measuring input to existing interference voltages.
Normally, when there is no high interference level at the
workplace or in case of a short circuit at the measuring input
zero is displayed immediately. Or, if the measuring object is
connected, the exact measured value is displayed. Fluctuations
in the displayed value by some digits are systemic and within
the tolerance.
If the resistance measuring range, the continuity testing range
or the diode test was selected and the measuring input is open,
the
OL
indication (exceedance of the measuring range) will be
displayed.
IMPORTANT INFORMATION ON THE MEASURING PROCESS!
Warning of electrical voltage
Improper handling of the measuring device entails a
risk of electric shock!
Before carrying out voltage measurements, observe the
following:
•
Never apply a voltage exceeding the rated nominal voltage
of the measuring device between the connections or
between the connections and earth (see imprint on the
housing).
•
Check the measuring tips for damaged insulation and for
continuity. Replace damaged measuring tips.
•
Check the insulation of the measuring device sockets.
•
Before using the measuring device, check its functionality
by carrying out measurements with a known voltage.
•
First connect the measuring tip connected to earth and
afterwards the live measuring tip. When disconnecting the
measuring tips, proceed in reverse order, i.e. disconnect
the live measuring tip first.
•
Prior to every voltage measurement make sure that the
measuring device is not set to the current measuring
range.
•
If the device indicates an exceedance of the measuring
range (
OL
) immediately after being connected to the
measuring object, first switch off the circuit at the
measuring object, then immediately remove the measuring
tips from the measuring object.
•
Do not switch any motors in the measuring circuit on or off
during a measurement. Voltage peaks caused by a switch-
on or switch-off can damage the measuring device.
Manual range selection
The device is equipped with an auto-range function, i.e. it
adjusts the indication of the measured value to the value that
has been measured.
The
RANGE
button (14) is used to change the display of the
measured value by changing the number of decimal places. To
do so, press the
RANGE
button until the measured value is
indicated as desired.
Press the
RANGE
button for approx. 2 seconds to return from
manual range selection to the auto range function.
Measuring DC voltage
1. Set the rotary switch to position .
2. Insert the plug of the black measuring tip into the
COM
measuring socket and the plug of the red measuring
tip into the
V/Ω
measuring socket.
3. Connect both measuring tips to the measuring object with
correct polarity (black to minus, red to plus).
ð
If the input voltage is negative, a minus (-) will appear in
front of the measured value on the display.
ð
The measured value will be indicated on the display.
4. If the
OL
indication (exceedance of the measuring range)
appears after the manual range selection, immediately
switch over to the respectively next higher range
(
RANGE
button). If the
OL
indication appears and the
maximum range has been set already or in case of the
automatic range selection, immediately switch off the
voltage supply at the measuring object and disconnect the
measuring device from the measuring object.
ð
The measured value will be indicated on the display.
