User Manual

48 GMC-I Messtechnik GmbH
8.8 Probe Voltage – U
U
Single measurements, rotary switch level: green
Switch Position
Measure-
ment Type,
With Mains 
to Test
Socket
Measure-
ment Type,
Without
Mains 
to Test
Socket
Measuring Functions
U
PE - P1
U
Probe voltage, RMS
U
~
Alt. voltage component
U
=
Direct voltage component
PE - P1 
(with mains)
U Probe voltage, RMS
U
~
Alt. voltage component
U
=
Direct voltage component
Mains to Test Socket
Schematic Diagram
Wiring Diagram
Permanently Connected DUT
Schematic Diagram
Wiring Diagram
Direct, alternating and pulsating voltages of up to 253 V can be
measured. Two connection types are available, one of which has
to be selected in the parameters menu.
Setting Measuring Parameters for U
Probe
Measuring 
Parameter
Meaning
Measurement Type,
Suitable for 
DUT Connection via
PE-P1 Measurement of voltages with
r
eference to PE, test socket re-
mains voltage-free
Permanent connection
PE-P1 (with
ma
ins)
Measurement of voltages with
reference to PE, line voltage is
applied to the test socket
Test socket
Polarity – only for PE-P1 (with mains)
L/N or N/L Selection of polarity for mains voltage to the test socket
Test Sequence
➭ Set the rotary switch to the U position.
➭ Connect the DUT’s mains plug to the test instrument’s test
socket.
➭ Start the test: press the START/STOP key. 

➭ PE-P1 (with mains
): Acknowledge the warning which in-
dicates that line voltage will
be connected to the test
socket.

➭ Co
ntact the ungrounded output for safety extra-low voltage
with test probe P1.
➭
Polarity can be set via direct selection immediately be-
fore measurement is started, without having to switch to
th
e parameters menu.
➭
The measured values are displayed. The measured
value recording symbol shown at the right appears.
Each time th
is key is pressed, the currently displayed
measured value is saved to the buffer.
➭ S
top the test: press the START/STOP key. 
The save symbol appears (floppy disk showing the
number of measured values
stored to buffer memory)
and prompts you to save the measured values to an ID
number.
➭ P
ress the ESC key in order to discard the measured
values stored to buffer memory and acknowledge by
pressing the key shown at the right.