Factory Settings; Custom Timed Pi Test; Custom Timed Dd Test; Setting Custom Test Time Values - AVO MEGGER BM25 Guide De L'utilisateur

Operation

Factory settings

The following table shows these test times as they are set on a
new instrument, for each of the Test modes. Note that the T1 and
the T2 test times set for the PI test are used to calculate a PI
result when carrying out a DD test.
Test Mode T1
SV
-
PI
1 min
DD Same as PI
BURN - IR -

Custom timed PI test

When new, the BM25 is set up with PI ratio is calculated on the
time settings of 1 minute (T1) and the 10 minute (T2) values.
Time setting T3 is also set at 10 minutes. These settings can be
adjusted from 15 seconds to 90 minutes. This original setup
produces one PI result, based on the ratio of T1 and T2. T3 is the
total test time (initially 10 minutes for the test time). By adjusting
T3, two separate PI ratio values can be calculated. The first PI
ratio is based upon the measurements of the T1 and the T2
values. The second result is calculated on the time settings of T2
and T3. Note that if T2 is equal to T3, only one result will be
calculated.

Custom timed DD test

The DD test can be customised in the same way as the PI test.
Initially T1 = 1 minute, T2 = 10 minutes, T3 = 30 minutes. This
gives a PI ratio based on T2 / T1, in addition to the DD value.
12
T2 T3
- 5 min (fixed)
10 min 10 min
Same as PI
30 min
- 30 min

Setting Custom Test Time values

1. Using the right hand
test mode.
2. Using the left hand
Adjust time T3 using the right hand
3.
completion, press the left hand
displayed as - - 2.
Adjust T2 using the right hand
4.
completion, press the left hand
displayed as - - 1.
Note:-
These times can be adjusted in any order, but T1 must
be shortest, and T3 must be longest.
The values set for T1 and T2 will apply to both PI and
DD test.
T3 Values are independent for PI and DD tests.
The new test times are retained when the instrument
is switched Off.
If any two values are the same, the PI result is not
calculated, and the result displayed as - - -.
End of test Results display
After time T3 is displayed, the test stops and the total test
results displayed in a constantly repeating sequence. For
details of display information, see Appendix 1.
Range keys, select the desired
Selector keys, select .
range keys. On
selector key. Time T2 is
range keys. On
selector key. Time T1 is