LEAK DETECTION SOLUTIONS
13
Unit 30, Lawson Hunt Industrial Park,
Broadbridge Heath, Horsham, West Sussex,
RH12 3JR
+44 (0) 1403 216100
info@aquilar.co.uk
www.aquilar.co.uk
L2.C CROSSCHECK
Figure 21 - Protection Level - CROSSCHECK MODE
Crosscheck gives the AT-WFM flexibility to be used
in applications where a comparison of two meters is
required, e.g. a block of flats with heat interface units,
especially useful if flats are left unoccupied for long
periods. The flow and return into each flat can be
monitored. If more water goes in than comes out then
the water loss will be noted by the AT-WFM and an
alarm generated.
There are two adjustment in this section that affect the
sensitivity of alarm conditions, tolerance and volume
per.
Tolerance is measured in percentage and allows a differential of up to 20% between channel pulse inputs. Options are:
•
0%
•
10%
•
20%
Volume per specifies the period of measurement. Options are:
•
½ hour
•
Hour
•
Day
e.g.1. Select tolerance 10% and volume per ½ hour. This means each half hour if the pulse input of each channel varies by more than
10% the system will go into alarm. On this setting an expected 100ltr measurement could vary by up to 20ltrs per half hour before an
alarm would be given. Total of 480ltrs per 24 hour period.
e.g.2. Select tolerance 20% and volume per Day. This allows up to 20% difference in channel pulse inputs in any 24 hour period. On this
setting an expected 100ltr measurement would only allow 40ltrs difference over a 24hr period.
Important Note:
Selecting 0% tolerance requires the pulse inputs to be matched at all times.
Important Note:
For effective operation identical pulse Meters with high accuracy
must
be used. Contact Aquilar for details on our
range of suitable water meters.
