User Manual

GMC-I Messtechnik GmbH 49
8.9 Measuring Voltage – U (with SECUTEST PRO or feature I01 only)
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
V – COM
U
Measuring voltage, RMS
U
~
Alt. voltage component
U
=
Direct voltage component
V - COM 
(with mains)
U Measuring 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 between the V and COM socket terminals.
• Measurements with the voltage measur
ing input of the volt-
meter function (V–COM), electrically isolated from the mains
Setting Measuring Parameters
Measuring 
Parameter
Meaning
Measurement Type,
Suitable for 
DUT Connection via
V – COM Display: RMS value + AC + DC Permanent connection
V – COM (with
mains)
Display: RMS value + AC + DC;
with mains to test socket, e.g. for
measuring protective extra-low
voltage at power packs
Test socket
Test Sequence, DUT at Test Socket (e.g. for measuring safety
extra-low voltage at power packs or chargers)
➭ Set the rotary switch to the U position.
➭ Se
t the parameter to V – COM (with mains).
➭ Co
nnect the DUT’s mains plug to the test instrument’s test
socket.
Attention!
!
Use only the included, contact-protected KS17-ONE
measurement cables when measuring dangerous volt
-
age.
➭ Connect the DUT’s output sockets to the V and COM sockets,
e.g. in order to be able to measure a safety extra-low voltage at
the DUT’s output.
➭ S
tart the test: press the START/STOP key. 

➭ V
-COM (with mains): Acknowledge the warning which in-
dicates that line voltage will
be connected to the test
socket.

➭ 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 pr
ompts 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.