29
Stoppage of the test at a preset current (break at I-limit)
The measurement will be stopped when the current reaches the maximum value (Maximum Output Current) defined by the
user (see below). This type of test is useful for testing varistors or other types of voltage limiter.
The I-LIM symbol is displayed.
FIXED VOLTAGE
1000 V
Input voltage
Frequency
Input current
Date 2011.05.23
10 V AC
50.0 Hz
24.6 pA
Time 10:31
I-LIM
500 V
2500 V
burn-in (burn-in)
The measurement is not stopped, whatever the value of the current. Depending on the application, this type of test can be
used to determine the position of insulation faults when there is burn-in: appearance of an electric arc during the test or burn
spot after the test.
The BURN symbol is displayed.
FIXED VOLTAGE
1000 V
Input voltage
Frequency
Input current
Date 2011.05.23
10 V AC
50.0 Hz
24.6 nA
Time 10:31
BURN
500 V
2500 V
The maximum current (Maximum Output Current)
This is the current not to be exceeded in the Break at I-limit type of test. (Break at I-limit).
Use the
keys to set it to between 0.2 and 5mA.
The current range (I-range)
This function is used to make measurements more rapidly when their order of magnitude is already known.
Use the
keys to set its value to Auto or Fix. Then choose the current range:
Current
< 300 nA
60 nA < I < 50 µA
10 µA < I < 6 mA
Current range
1
2
3
For example for U
N
= 10,000 V :
Current range
1
2
3
resistance
R > 30 G
W
200 M
W
< R < 16,6 G
W
10 M
W
* < R < 1 G
W
* : 10M
W
because Imax = 1 mA at 10,000 V.
The fixed current range remains active for as long as the switch is not turned.
