Manual

Gossen Metrawatt GmbH 41
11 Measuring Voltage and Frequency
Select the Measuring Function
Switch Back and Forth Between Single and 3-Phase Measure-
ment
Press the softkey shown at the left in order to switch
back and forth between single and 3-phase mea-
surement. The selected phase measurement is dis-
played inversely (white on black).
11.1 Single-Phase Measurement
Connection
A probe must be used in
order to measure probe voltage U
S-PE
.
11.1.1 Voltage Between L and N (U
L-N
), L and PE (U
L-PE
) a nd N
and PE
(U
N-PE
) with Country-Specific Plug Insert, e.g.
SCHUKO
Press the softkey shown at the left in order to switch
back and forth between the country-specific plug
insert, e.g. SCHUKO, and the 2-pole adapter. The
selected connection type is displayed inversely
(white on black).
Note
If you view the country-specific plug insert, e.g.
SCHUKO, from the front, you’ll see two embossed let-
ters, namely L and N. Automatic polarity reversal does
not take place during voltage measurement. You can
thus specify the terminal to which the phase is connected
in the socket. If (mains) voltage is displayed for UL-PE,
then the phase is located where L appears on the con-
nector. If (mains) voltage is displayed for N-PE, then the
phase is located where N appears on the connector.
11.1.2 Voltage Between L – PE, N – PE and L – L
with 2-Pole Adapter Connection
Press the softkey shown at the left in order to switch
back and forth between the country-specific plug
insert, e.g. SCHUKO, and the 2-pole adapter. The
selected connection type is displayed inversely
(white on black).
See section 10.9 concerning 2-pole measurement with rapid or
semiautomatic polarity reversal.
11.2 3-Phase Measurement (line-to-line voltage) and Phase
Sequence
Connection
The measuring adapter
(2-pole) is required in
order to connect the
instrument, and is
expanded to a 3-pole
measuring adapter with
the included measure-
ment cable.
U
2
1