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Zenner Water Meter Pulse Connection

Overview #

Connect the Wires #

  • Connect the Green (+) to the + or pulse side of the IO unit.
  • Connect the Black (-) to the common, grd, or – of the IO unit. 

Troubleshooting / Verifiying #

Before connecting the wires from the Zenner meter to the IO or pulse collecting unit, field test the pulse output by checking its continuity. 

Using a handheld voltage multi-meter, change its measurement selection to the continuity setting. mceclip3.png

  • Place the red probe of the hand held meter to the green wire. 
  • Place the black probe of the hand held meter to the black wire. 

When the Zenner water meter creates a pulse, it will make the handheld meter create an audible tone that you will be able to hear.  There should be no sound until enough water has passed through the meter to create a pulse.  If the Zenner water meter is showing flow, hold this way till the tone is heard.  Once heard, connect to the pulse collector. 

 Note** Verify with the manufacturer the pulse rate.  Some meters only pulse per 1000 gallons or 100 gallons.    

Continuity  #

This is the presence of a complete path for current flow. A closed switch that is operational, for example, has continuity. A continuity test is a quick check to see if a circuit is open or closed. Only a closed, complete circuit (one that is switched ON) has continuity. During a continuity test, a digital multimeter sends a small current through the circuit to measure resistance in the circuit. A meter with a continuity beeper briefly sounds off when it detects a closed circuit. The level of resistance needed to trigger the beeper varies by meter, but most will indicate continuity with a measurement between 0-50 ohms. The audio signal speeds the measuring process since technicians do not have to look at the meter during testing.

Continuity testing determines: #

  • If a fuse is good or blown.
  • If conductors are open or shorted.
  • If switches are operating properly.
  • If circuit paths are clear (accomplished by circuit or conductor tracing).

Continuity testing should be attempted only when voltage is NOT present in the circuit being tested.

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