Brochure
Possible cause What to examine How to find the error
Power consumption is too high
and/or the head is too low
Decide whether it is the power
consumption or the head which
deviates
Use one of the three schemes
below, scheme 1 -3
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B. Check of test results
When unexpected test results occur, it can be dicult to find out why. Is the
tested pump in reality not the one we thought? Is the test bed not measur-
ing correctly? Is the test which we compare with not reliable? Have some
units been swaped during the data treatment?
Typical examples which deviate from what is expected is presented on the
following pages. Furthermore, some recommendations of where it is ap-
propriate to start looking for reasons for the deviating test results are pre-
sented.
The test shows that the eciency is below the catalogue curve.
B. Check of test results