Programming
15
4.2 EXAMPLE
A flowmeter produces 20.538 pulses per litre and has a maximum flowrate of
150litres/minute. It is required to batch quantities in batches of around 300
litres and to alarm if there is no flow once the batch has started.
To increase the accuracy of the batch, a two stage valve will be used and the
flow will be slow prior to the end of the batch to enable a more accurate
cutoff.
It has also been decided to reduce the flowrate 10 litres prior to the end of
the batch. The instrument is then programmed as follows:
Step
Value of
Parameter
Description
00020
Scaling factor (Whole numbers).
5380
Scaling factor (Decimals).
1
One decimal place.
1
One second delay on full flow to
stop pipe hammer.
10
10 litre prestop.
2
Two second signal timeout.
350
350 litre batch limit
.
2.XX
Software Version.