User Manual

44 GMC-I Messtechnik GmbH
Setting Measuring Parameters for IG
Measuring 
Parameter
Meaning
Measurement Type
Suitable for 
DUT Connection via
Direct Direct measuring method, 
optional probe contact
Test socket, 
AT16DI/AT32DI (only diff. is 
sensible)
Differential Differential current 
measurement
Test socket
Alternative Equivalent leakage current mea-
suring method with probe con-
tact
Test socket, AT16DI/AT32DI
AT3 adapter
SECUTEST PRO or feature I01:
measurement with
AT3 adapter
AT3-I I I E, AT3-I IS, AT3-I IS32
Clamp
SECUTEST PRO or feature I01: 
Measurement of device leakage
current via current clamp sensor
with voltage output, and conver-
sion to and display as current val-
ues.
Permanent connection
Polarity
1
– for direct, differential and AT3 adapter measurement types only
L/N or N/L Selection of polarity for mains voltage to the test socket
The measuring parameters of measuring ty
pe „Alternative“ U(setpoint) and fre-
quency(setpoint) are no longer included as fr
om firmware version 1.7.0. These
parameters apply to individual measurements as well as test sequences and
have to be entered in the SETUP, see 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 Transformer ratio of the current clamp sensor WZ12C. 
For setting the current clamp factor at the clamp WZ
12C and the
SECUTEST PRO (see table above).
10 mV : 1 mA
100 mV:1 mA Transformer ratio of the current clamp sensor SECUTEST CLIP. 
For setting the current clamp factor at the SECUTEST PRO.
1 V : 1 A
1
Measurement must be performed with mains polarity in both directions.
The largest value is documented
Test Sequence
➭ Prior to all leakage current measurements, please make sure
that the measurement parameters „Ref. voltage L-PE“ and
„Testingfreq. Alt“ have been correctly set in the SETUP, see
section 6.2.
➭ Set the rotary switch to the I
G
position.
➭ Connec
t the DUT in accordance with the selected measuring
method.
➭ Se
t the parameters: 
Select the Dir
ect, Differential or Alternative measurement type.
➭ As an alternative, you can select the measurement type
directly using the key shown at the right. 
➭ In the case of direct and differential current measurement,
measurement must be performed with mains plug po-
larity in both directions. Select
the respective polarity
to this end by pressing the NL/LN key.
➭ Start the test: press the START/STOP key.
➭ After each reconnection to the mains, and as soon as
the first test is started, a mains connection test is exe-
cuted.
➭ I
n the case of the direct or differential measurement type:
acknowledge the warning which indicates 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 prompts you to save the measured values to an ID
number.
➭ Read the measur
ed values and compare them with the
table of permissible limit values.
➭ 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.
Test Sequence with AT3-I I I E Adapter
Attention!
!
Please observe the operating instructions for the AT3-
I I I E regarding correct connection of th
e test adapter and
the device under test, as well as peculiarities involved in
the test sequence.
Maximum Allowable Limit Values for Equivalent Leakage Current
in mA
Test Standard I
GA
I
EDL
VDE 0701-0702
PC I: 3.5 / 1 mA/kW
1
PC II: 0.5
IEC 62353
(VDE 0751-1)
PC II
0.2
2
PC I (PE or parts connected to PE)
1
Permanently connected devices with PE
10
Portable x-ray devices with additional PE
5
Portable x-ray devices without additional PE
2
Devices with mineral insulation
5
I
GA
Device leakage current
I
EA
Equivalent leakage current
PE Protective conductor
1
For devices with heating power  3.5 kW
2
This limit value is not taken into consideration in the DIN EN 62353
(VDE 0751-1) standard.