25
Discharging time for 32 V test voltage
terminating resistor: 1 GΩ
Capacitance
Discharge time
Ex-Areas
47 nF
1 s
ok
100 nF
2 s
ok
200 nF
4 s
ok
> 200 nF
> 4 s
not allowed
4.5 Measuring with capacitance
Attention
!
Measurements with non allowed high
capacitance in Ex-areas are not permitted. The test
procedure must be stopped and the measurement
object has to be discharged. Only after complete
discharge the secure connection may be removed.
ensure a secure connection with the measure
ment object
start measurement with 32 V
Keep pushbutton
pressed until a constant
measurement result is indicated.
Release the pushbutton
the discharge
voltage will be indicated in the upper display.
The flashing Volt-LED warns against charging
voltage of the external capacitance.
Determine the time until the measurement
object is discharged and the display shows„Rdy“.
Determine the connected capacitance in Ex-areas
according to the following table:
Discharging time for 100 V test voltage
terminating resistor: 1 GΩ
Capacitance
Discharge time
Ex-Areas
1 nF
< 1 s
ok
47 nF
4 s
ok
100 nF
7 s
ok
150 nF
10 s
not allowed
Measurements with 100 V test voltage
are only permitted, if the safety-related
limit values of the plant allow this and the external
capacitance was checked with 32 V
and does not exceed 100 nF.
Discharging time for 500 V test voltage
terminating resistor: 1 GΩ
Capacitance
Discharge time
Ex-Areas
1 nF
< 1 s
ok
47 nF
8 s
not allowed
100 nF
15 s
not allowed
200 nF
30 s
not allowed
Measurements with 500 V test voltage
are only permitted, if the safety-related
limit values of the plant allow this and no external
capacitance was checked with 100 V
and does not exceed 1 nF.
Charge voltage indication with external
connected capacitance
