Benning ST 710 Bedienungsanleitung Seite 21

- If R is lower than the admissible limiting value, the measured value of R
PE
a appears next to the R
reversed polarity. After the R
started.
- If "Lo LOAD" is shown on the display, please check whether the test object is switched on.
- Press the key 2 to continue the testing procedure in case of the load being too low (R
- If the insulating resistance R
next to the R
ISO
- Similarly, a
than the admissible limiting value.
- The test is considered to be passed, if "PASS" is shown on the display.
See figure 3: T esting of devices of protection class I (devices with protective conductor and
accessible conductive parts which are connected to the protective conductor)
Note on measuring the protective conductor resistance:
- Alternatively, the measurement of the protective conductor resistance R
ried out as permanent measurement (max. 3 minutes). For this purpose press the key
2 for approx. > 5 sec. until the  symbol appears on the display. Check the connecting
line of the test object by bending it over the entire length in order to detect weak points
or a break of the protective conductor. The BENNING ST 710 continuously records the
current measured value on the display and stores the maximum value in the memory. By
pressing the key 2 again, the measurement is carried out with reversed polarity. Press
the key again to indicate the maximum value of R
testing procedure as described in section 8.2.1.
07/ 2018
symbol. Now, the R
PE
test has been passed, the test of the insulating resistance is
PE
is higher than the admissible limiting value, a
ISO
symbol.
is shown next to the I
BENNING ST 710
measurement is carried out again with
PE
symbol, if the protective conductor current I
EA
PE
PE
on the display and to continue the

is shown and
< 100 kΩ).
L-N
appears
is lower
EA
can be car-
PE
16