Gossen MetraWatt SECULIFE ST PRO, Руководство пользователя, Страница: 40 / 114

40 GMC-I Messtechnik GmbH
Attention!
!
Removing the Connector Cable
Do not remove the DUT’s connector cable until the test
has been stopped, in order to assure that the capacitors
have been discharged.
➭
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.
Minimum Permissible Limit Values for Insulation Resistance
* With activated heating elements
(where heating power > 3.5 kW and R
INS
< 0.3 M
Ω
: leakage current
measurement is required)
Notes
Insulation resistance and/or leakage current must be measured
for protection class II and III devices, as well as for battery pow-
ered devices, by contacting all exposed, conductive parts with
test probe P1.
Batteries must be disconnected during testing of battery powered
devices.
8.7 Measuring Leakage Current
Attention!
!
Measurement with DUT Connected to Line Voltage
It’s absolutely essential to assure that the device under
test is operated with line voltage during performance of
leakage current measurements with the direct or differential
current method
. Exposed conductive parts may conduct
dangerous touch voltage during testing, and may not
under any circumstances be touched. (Mains power is
disconnected if leakage current exceeds approx.
10 mA.)
Frequency response in
accordance with the
figure to the right is
taken into consider-
ation for all leakage
current measure-
ments (
IPE , IT , IE , IA, IP,
IPA ) (direct, differential,
alternative).
Test Standard Test voltage
R
INS
LN
→
PE
LN
→
Probe
Probe
→
PE
PC III Heating
VDE 0701-
0702:2008
500 V
1 M
Ω
2 M
Ω
5 M
Ω
0.25 M
Ω
0.3 M
Ω
*
DIN EN 60974-4
VDE 0544-
4:2009-06 2 M
Ω
5 M
Ω
5 M
Ω
Test Standard
Test
voltage
R
INS
PC I PC II
IEC 62353
(VDE 0751-1)
500 V
2 M
Ω
7 M
Ω
BF or CF BF or CF
70 M
Ω
70 M
Ω
10 10
2
10
3
10
4
10
5
10
6
+20
0
–20
–40
–60
Frequency (f) in Hz
Re
la
ti
ve
ma
gni
tu
d
e
(dB
):
20
log
U(f
)
U(f=10)