User Manual

16 GMC-I Messtechnik GmbH
5.8 2-Pole Measurement with Fast or Semiautomatic Polarity
Reversal
Fast, semiautomatic polarity reversal is possible for the following
measurements:
• Voltage U
• Loop impedance Z
LP-E
• Internal line resistance measurement Z
L-N
• Insulation resistance, R
INS
Fast Polarity Reversal at the Test Plug
The polarity parameter is set to AUTO.
Fast and convenient switching amongst all polarity variants, or
switching to the parameter settings submenu, is possible by
pressing the I
ΔN
key at the instrument or the test plug.
Semiautomatic Polarity Reversal in Memory Mode
The polarity parameter is set to AUTO.
If testing is to be conducted with all polarity variants, automatic
polarity changing takes place after each measurement when the
“Save” button is pressed.
Polarity variants can be skipped by pressing the I
ΔN
key at the
instrument or the test plug.
6 Measuring Voltage and Frequency
Select Measuring Function
Switch Between Single and 3-Phase Measurement
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).
6.1 Single-Phase Measurement
Connection
A probe must be used in
order to measure probe voltage U
S-PE
.
6.1.1 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 look at the country-specific plug insert, e.g.
SCHUKO, from the front, you can see the embossed let-
ters „L“ and „N“. During voltage measurement there is no
automatic polarity reversal. You can thus determine to
which terminal in the mains socket the phase is applied. If
(line) voltage is displayed for UL-PE, the phase is applied
to terminal L indicated on the plug. If (line) voltage is dis-
played for N-PE, the phase is applied to the terminal for N
in the socket.
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
N-PE
L1-PE
L2-PE
L3-PE
L+N-PE
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
Z
L-PE
Z
L-N
L1-PE
L2-PE
L3-PE
R
iso
L1-PE
L2-PE
L3-PE
N-PE
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
U
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
N-PE
L1-PE
L2-PE
L3-PE
L+N-PE
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
Z
L-PE
Z
L-N
L1-PE
L2-PE
L3-PE
R
iso
L1-PE
L2-PE
L3-PE
N-PE
L1-N
L2-N
L3-N
L1-L2
L2-L3
L1-L3
U
U