7
10. Voltage measurements
The demo-multimeter may
NOT
be
used for direct measurements on a
building’s electrical wiring installation
or directly at the source of the mains
voltage feed to the junction box. See
page 2 of “Measurement categories”
as specified in DIN EN 61010-1.
The nominal voltage of the voltage
source may not exceed 600 V.
If measurements are made when the magni-
tude of the variable is unknown, always select
a large measuring range before shifting down
to lower ones.
Connect the common/ground lead first and
only then the signal lead.
10.1 DC voltages up to 600 V:
Set the toggle switch 2 to
.
Alternatively, if measurements are to be
made with the zero point in the centre, then
set the toggle switch 1 to
.
Select the required measuring range to a
range measured in V.
For measurements of voltage up to 100 mV,
set the rotary switch to the range 0.1
mA/100 mV.
10.2 AC voltages up to 600 V:
Set the toggle switch 2 to
.
Select the required measuring range to a
range measured in V.
For measurements of voltage up to 100 mV,
set the rotary switch to the range 0.1
mA/100 mV.
11. Measuring current and voltage together
The demo-multimeter may
NOT
be
used for direct measurements on a
building’s electrical wiring installation
or directly at the source of the mains
voltage feed to the junction box. See
page 2 of “Measurement categories”
as specified in DIN EN 61010-1.
The nominal voltage of the current
source may not exceed 600 V.
The multimeter is to be connected
in series with the load on the side
where the voltage with respect to
ground is lowest!
Turn off the circuit before meter is
connected into it.
11.1 DC voltages and currents:
Set the toggle switch 2 to
.
Use the rotary switch to set the desired volt-
age measuring range and read off the meas-
urement.
Set a suitable current measuring range and
read off the measurement.
11.2 AC voltages and currents:
Set the toggle switch 2 to
.
Use the rotary switch to set the desired volt-
age measuring range and read off the meas-
urement.
Set a suitable current measuring range and
read off the measurement.
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