Operation
17
Figure 12 Example of display for starting Bs 5730a Proof Test
4. The display will now assume the standard format as shown in figure 6. Use of the right hand key
reverts the user to the main menu. Upon attaining the upper voltage limit the display will indicate the
elapsed time of voltage application until one minute has elapsed or breakdown has occurred.
5. The sequence of events is now dependent on the result of the first test. If the test was successful no
further testing takes place. The display figure 13a is presented.
Figure 13 a Examples of BS 5730a Result Screen Figure 13b
6. If the test was unsuccessful according to BS 5730a, two further consecutive successful tests must
be performed. Prior to voltage application a one minute stir followed by a one minute stand period is
performed. Display information is based on figures 7 and 8 respectively.
7. A second application of the proof voltage will occur next with the sequence repeating 4 above. The
display will indicate the actual test number in progress.
8. The sequence of events is now dependent on the result of the second test. If the test was
unsuccessful no further testing takes place. The display figure 13b is presented.
9. If the test was successful a third test must be performed. Prior to voltage application a one minute
stir followed by a one minute stand period are performed. Display information is based on figures 7
and 8 respectively.
10. A third application of the proof voltage will occur next with the sequence repeating 4 above. The
display will indicate the actual test number in progress.
11. If the test was successful the display of figure 13a is presented, alternatively figure 13b will be
displayed if the third test is unsuccessful.
12. At completion of the test (1, 2 or 3 tests may have been performed), the respective PASS/FAIL
screen figure 13 a/b will be presented. Operation of the right control key labelled ‘QUIT’ returns the
operator to the main menu.
PASS LIMIT 30 kV
PASS
GAP 2,5 mm
BS 5730a : A, D
QUIT
PASS LIMIT 30 kV
FAIL
GAP 2,5 mm
BS 5730a : A, D
QUIT
FIT VESSEL
2,5 mm
BS 5730a : A, D
START QUIT
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