By handling the rate-of-flow calculation, and high-flow alarm detection logic within the EtherMeter, there is no need for an external setpoint controller or PLC, thereby reducing costs and wiring complexity. It is noteworthy that the EtherMeter can discern flow rate from most meter makes/models, including those with encoder-type and/or pulse-type signals.
Essentially, in this application, the EtherMeter functions as a programmable flow switch, in which the user sets the flow-threshold.
Meter 1 High-Flow Alarm Operation:
When FLOW1 is below the ALARM1 threshold (GPM), then the AUX1 output is low (0V). When FLOW1 exceeds the ALARM1 threshold (GPM), then the AUX1 goes high (+5V).
Meter 2 High-Flow Alarm Operation (if present):
When FLOW2 is below the ALARM2 threshold (GPM), then the AUX2 output is low (0V). When FLOW2 exceeds the ALARM2 threshold (GPM), then the AUX2 goes high (+5V).
Setup Menu Settings:
- SET AUX1 FALARM
(activates AUX1 as a high-flow alarm output for meter 1)
- SET AUX2 FALARM
(activates AUX2 as a high-flow alarm output for meter 2)
- SET ALARM1 NNNNNNN
(sets high-flow 1 threshold as nnnn.nnn (rate-of-flow units, eg GPM))
- SET ALARM2 NNNNNNN
(sets high-flow 2 threshold as nnnn.nnn (rate-of-flow units, eg GPM)
Here are some application photos from the City of Boone, Iowa:
Are you interested?… or perhaps you have a similar application? Don’t hesitate to call. We’ll be glad to discuss the solution in more detail.
City personnel are alerted to the leak condition by a red alarm indication lamp.