38 GMC-I Messtechnik GmbH
Setting Measuring Parameters for IPE Test Sequence for Direct Measuring Method
➭ Before conducting any leakage current measurements, make
sure that the “Ref. voltage L-PE” and “Testingfreq. Alt” mea-
surement parameters have been correctly set in SETUP (see
section 6.2).
➭ Set the rotary switch to the I
PE
position.
➭ Select the Direct measurement type:
– By setting the parameters
or
– Directly via the Measurement Type key
➭ Connect the DUT’s mains plug (protection category I) to the
test instrument’s test socket.
➭ Make sure that the device under test is switched off.
➭ Start the test: press the START/STOP key.
➭ Switch the device under test on.
➭ The measurement must be performed with mains plug
polarity in both directions by pressing the NL/LN key.
➭ Acknowledge the warning which indicates that line
voltage will be connected to the test socket.
➭ Switch the device under test on.
➭ Contact all accessible conductive parts, one after the other,
with test probe P1, which are not connected to the housing,
as well as any output sockets for safety extra-low voltage if in-
cluded.
➭ 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 buffer memory.
➭ Turn off the device under test.
➭ End 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.
➭ Read the measured values and compare them with the table
of permissible limit values.
➭ 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.
Test Sequence with AT3-IIIE Adapter
Please observe the operating instructions for the AT3-IIIE
regarding correct connection of the test adapter and the de-
vice under test, as well as peculiarities involved in the test
sequence.
Measuring
Parameter
Meaning
Measurement Type
Suitable for
DUT Connection via
Direct Direct measuring method Test socket,
AT16DI/AT32DI (direct or diff.)
Differential Differential current measurement Test socket
Alternative Equivalent leakage current
method
Test socket, VL2E, AT3 adapter
(AT3-I IIE, AT3-IIS, AT3-IIS32),
AT16DI/AT32DI
AT3 adapter
SECUTEST PRO or feature I01:
measurement with
AT3 adapter
AT3-IIIE, AT3-IIS, AT3-IIS32
Clamp
SECUTEST PRO
or feature I01:
Measurement of protective con-
ductor current via current clamp
sensor with voltage output, and
conversion to and display as cur-
rent values.
Permanent connection
Polarity – for direct and differential measurement type only
L/N or N/L Selection of polarity for mains voltage to the test socket
The U (setpoint) and frequency (setpoint) measuring parameters for the “Alterna-
tive” measurement type are no longer included as of firmware version 1.7.0.
These parameters apply to individual measurements as well as test sequences
and have to be entered in SETUP (see section section 6.2).
U(set) – for alternative measurement type only
110 V, 115 V,
220 V, 230 V, 240 V
Selection of a line voltage for synthetic test voltage
Frequency(set) – for alternative measurement type only
48 Hz ... 400 Hz
Selection of a line frequency for synthetic test voltage
Clamp factor – only for clamp measurement type
1 mV : 1 mA Transformation ratio of the WZ12C current clamp sensor.
For setting the current clamp factor at the WZ12C clamp and the
SECUTEST PRO (see table above).
10 mV : 1 mA
100 mV:1 mA Transformation ratio of the SECUTEST CLIP current clamp sensor.
For setting the current clamp factor at the SECUTEST PRO.
1 V : 1 A
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