Precision-digital PD6200 User Manual download pdf (Page 64)

Model PD6200 Analog Input Rate/Totalizer Instruction Manual

Application #2: Pump Alternation Using Relays 3 & 4

1. Relays 1 and 2 are set up for low and high alarm indication.

2. Relays 3 and 4 are set up for pump alternation.

Set and Reset Point Programming

Relay Set Point Reset Point Function

1 495 750 Controls low alarm

2 7500 6900 Controls high alarm

3 7000 900 Controls backup pump

4 6000 1000 Controls main pump

The following graphics provide a visual representation of a typical pump

alternation application with high and low alarm monitoring:

 Relay #4 turns the main pump on at 6000 gallons and turns it off

at 1000 gallons.

 With the Pump Alternation feature activated, the next time the

level reaches 6000 gallons, relay #3 transfers and starts the

backup pump.

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Precision-digital PD6200 User Manual Page 64