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Weird wattage pull showing on a Cambium 2.4 1000

Posted: Tue Mar 26, 2019 11:07 am
by alexivie
Noticed this today on a WS-26-400-AC running Firmware Version 1.5.0.
(I had just power cycled the EPMP to see if the wattage would clear up, and reset the statistics before grabbing the screenshot below.)

NetronixWeird.JPG

A Cambium EPMP 1000 2.4 that should be pulling 4-8 watts is showing pulling 77+ watts.
The EPMP unit itself is working fine and not showing any problems... Any ideas?

Re: Weird wattage pull showing on a Cambium 2.4 1000

Posted: Tue Mar 26, 2019 11:49 am
by sirhc
Not weird, most likely a damaged current sensor. This type of damage is most often from ground current from a ground loop meaning you have 2 ground potentials, electrical service ground rods and tower ground rods and they are not bonded. And or your service ground rods are insufficient (add new ones).

I would RMA the unit for repair and then spend some time on your grounding.

Possibly add a couple NEW electrical service ground rods and if possible bond electrical service ground rods to tower ground rods.

Re: Weird wattage pull showing on a Cambium 2.4 1000

Posted: Tue Mar 26, 2019 1:11 pm
by alexivie
Thanks for the info!
This is a 320' commercial radio and cell tower, but I will definitely take a look at grounding again when I get back up there.
I'll work on getting that unit RMAed soon!

Thanks!