Gossen Metrawatt GmbH
63
Setting Measuring Parameters for IE
1
Measurement must be performed with mains polarity in both directions. The
largest value is documented.
Test Procedure
➭
Before conducting any leakage current measurements, make
sure that the “Ref. voltage L-PE” and “Alt. Test Freq.” mea-
surement parameters have been set correctly in SETUP (see
section 13.3).
➭
Set the rotary switch to the
I
E
position.
➭
Connect the DUT in accordance with the selected measuring
method.
➭
Select the measurement type:
– By setting the parameters
or
– Directly via the
Measurement Type
key
➭
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. Press the
Polarity
softkey in
order to change polarity.
➭
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.
➭
In the case of the direct or differential measurement type:
Acknowledge the warning which indicates that line
voltage will be connected to the test socket.
➭
Switch the device under test on.
➭
The measured values are displayed. The measured
value recording icon shown at the right appears. Each
time this key is pressed, the currently displayed mea-
sured value is saved to buffer memory.
➭
Turn off the device under test.
➭
End the test:
Press the
START
/STOP
key.
The save icon appears (floppy disk showing the num-
ber of measured values stored to buffer memory) and
prompts you to save the measured values to a test ob-
ject 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 Procedure with AT3-I IIE Adapter
Attention!
!
Please observe the operating instructions for the AT3-
IIIE regarding correct connection of the test adapter and
the device under test, as well as peculiarities involved in
the test procedure.
Maximum Permissible Limit Values for Device Leakage Current in
mA
I
GA
Device leakage current
PE Protective conductor
Measuring
Parameter
Meaning
Meas. Type
Suitable for
DUT Connection via
Direct
Direct measuring method
Test socket, AT16DI/AT32DI
Differential
Differential current method
Test socket
Alternative
Equivalent leakage current
method
Test socket, AT16DI/AT32DI
AT3 adapter
Feature I01 (e.g. SECUTEST ST PRO):
measurement with AT3 adapter
AT3-IIIE, AT3-IIS, AT3-IIS32
Clamp
Feature I01 (e.g. SECUTEST ST PRO):
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
Normal
Selection of polarity for mains voltage to the test socket
Reversed
The U(set) and Frequency(set) measuring parameters for the “Alternative” mea-
surement type are no longer included as of firmware version 1.7.0. These param-
eters apply to single measurements as well as test sequences, and have to be
entered in SETUP (see section 13.3).
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 ST 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 ST PRO.
1 V : 1 A
Test Standard
All Meas. Types
Except “Alternative”
“Alternative” Measurement Type
IEC 62353 /
EN 62353 /
VDE 0751-1
PC I: 0.5
PC II; 0.1
PC II
0.5
PC I (PE or parts connected to PE)
1
Permanently connected DUTs with PE
10
Portable X-ray devices with additional PE
5
Portable X-ray devices without additional PE
2
DUTs with mineral insulation
5
Summary of Contents for SECULIFE ST BASE 25
Page 111: ...Gossen Metrawatt GmbH 111 ...
