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Cool little tool for verifying circ pump rotation ?
Dave Carpentier
Member Posts: 620
Watched a tech whip out a small keyfob looking tool and held it against the end of a circ pump. The little bar on the tool spun around (like a compass needle spinning), so he knew the pump was currently operating.
Such a simple and useful thing.
Everyone has one of these I guess ?
Such a simple and useful thing.
Everyone has one of these I guess ?
30+ yrs in telecom outside plant.
Currently in building maintenance.
Currently in building maintenance.
0
Comments
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Grundfos MRI Run Indicator Magnetic Rotation Instrument Key
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But don’t be fooled, it may be spinning and the pump is not. It reads the electromagnetic force being present. It does not work on all brands of pumps, or on ECM type.
It will also spin when pressed against some solenoid valves. That are not rotating.Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream1 -
Just like that. Not sure if it was Grundfos.
If I can find my compass around here somewhere, I'm gonna see if that works.
30+ yrs in telecom outside plant.
Currently in building maintenance.0 -
Many different companies used them for giveaways. Get one at Amazon, and here is the manufacturerBob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
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I've seen as many False readings as positive. It shows Voltage present not that its turning!0
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or a voltmeterSTEVEusaPA said:You can get the same basic info from just clamping your meter onto it.
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0
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