User Manual

GMC-I Messtechnik GmbH 35
8.7 Probe Voltage – U
Schematic Diagram (mains to test socket)
Schematic Diagram (permanently connected DUTs)
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
Direct Selection – Setting the Measurement Type
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.
➭ Contact 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
the parameters menu.
➭ The measured values are displayed. The measured
value recording symbol shown at the right appears.
Each time this key is pressed, the currently displayed
measured value is saved to the buffer.
➭ Stop 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.
➭ Press the ESC key in order to discard the measured
values stored to buffer memory and acknowledge by
pressing the key shown at the right.
Switch
Setting
Meas.
Variant
Measuring functions
Single measurements, rotary switch level: green
Measurements at DUTs with line voltage
U
U Probe voltage, TRMS
U
~
Alternating voltage component
U
=
Direct voltage component
Measuring
Parameter
Meaning
Measurement type
PE-P1 Meas. of voltages with reference to PE, test socket remains
voltage-free, e.g. for perm. connected DUTs
PE-P1 (with mains) Measurement of voltages with reference to PE, line voltage is
applied to the test socket
L/N or N/L
Selection of test voltage pol. (for PE-P1 with mains only)
Measuring
Parameter
Meaning
Measurement type
PE-P1 Meas. of voltages with ref. to PE, test socket remains voltage-
free, e.g. for perm. connected DUTs to be tested
PE-P1 (with mains) Measurement of voltages with reference to PE, line voltage is
applied to the test socket
U