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Benning IT 101 Manual

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02/ 2011
BENNING IT 101
20
See figure 6: Measuring the polarization index (PI) / dielectric absorp-
tion rate (DAR)
Polarization index (PI) = R10-Min/ R1-Min
with: R10-Min = measured insulating resistance after 10 minutes
R1-Min = measured insulating resistance after 1 minute
Dielectric absorption rate (DAR) = R1-Min/ R30-Sec
with: R1-Min = measured insulating resistance after 1 minute
R30-Sec = measured insulating resistance after 30 seconds
Note:
A polarization index > 2 or a dielectric absorption rate > 1.3 are characteristic for
an excellent insulation quality.
8.5.1 Measuring results after PI measurement
- After the measurement is completed, it is possible to scroll the measuring
results by pressing the "<“ key (blue key
3
).
See figure 7: Measuring results after PI measurement
8.5.2 Measuring results after DAR measurement
- After the measurement is completed, it is possible to scroll the measuring
results by pressing the "<“ key (blue key
3
).
See figure 8: Measuring results after DAR measurement
8.6 Memory function
The BENNING IT 101 is equipped with an internal memory of measured values
with 100 storage locations for each measuring function.
8.6.1 STORE (storage of measured values)
- Press the STORE/ RECALL key
5
to store the measured values in the
memory. When the key is pressed, the "MEM symbol S flashes and the
number of the measured values stored M is shown on the display
2
.
The memory is divided into five segments. Each segment consists of 100
storage locations.
Voltage Resistance Insulating resistance DAR PI
1 voltage resistance resistance DAR value PI value
2 leakage current R30-Sec R1-Min
3 testing voltage R1-Min R10-Min
Table 1: Stored values of the respective measurement
8.6.2 RECALL (call of measured values)
- To call a stored measured value, press the STORE/ RECALL key
5
for 2
seconds. The "MEM“ symbol S and the number of measured values stored
M are shown on the display
2
.
- Press the blue key
3
and the COMP key
4
to scroll the memory.
- If the memory is empty, "nOnE" is shown on the display.
See figure 9: Calling stored measured values
See figure 10: Stored values of the insulation measurement
8.6.3 Calling the stored measured values of the PI/ DAR measurement
- Press the LOCK key
6
(PI/ DAR) for 2 seconds. The "PI" symbol L is
shown on the display
2
.
- Select the desired function (DAR) K or (PI) L by pressing the key again.
The selected function is shown on the display
2
.
- Press the STORE/ RECALL key
5
for some seconds to get into the
RECALL mode.
- Press the blue key
3
and the COMP key
4
to scroll the memory.
- If the memory is empty, "nOnE" is shown on the display.
See figure 11: Stored values of the DAR measurement
See figure 12: Stored values of the PI measurement
8.6.4 Deleting measured values
- To delete the memory of measured values of a measuring function (seg-
ment), press the STORE/ RECALL key
5
for more than 5 seconds. On the
display
2
, the "MEM“ S and "clr“ B symbols are flashing twice.
- To delete the entire memory of measured values (all segments), switch the
measuring instrument off, press and hold the STORE/ RECALL key
5
and
switch the measuring instrument on again. The "All“ B "del“ M symbol is
shown on the display
2
.
… 26 …


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