area
PT5040 Operation Manual Chapter 7 User guide
switch off the test method and directly take the corona comparison method.
⑤
It is the same as A
④
.
Select standards
1.
Set test voltage. Then observe the corona value under non-standard test mode (7.2.1).
2.
Sample the standard wave by methods mentioned in 7.2.2. Test 10 to 20 samples and
select products that have the most similar differences.
3.
Take the selected products to make sample average (4.3.1.1 Manual) and choose the
final result as the standard wave.
4.
Results obtaining after procedures 1-3 can be taken as the standards.
Chart for
differential
In the process of BDV test, the secondary display zone displays not only the extraction
value of the corona but also the chart record of differential area after each test. The chart can
help user observe the changing regularity of the area differences during the test from the
start voltage to the end voltage.
7-4
