Okay, I'm nuts.

[TonyPh12345]

At 4:35pm (CST) today, my brand-new GEM has gone nuts:

Screenshot 2021-02-22 172752.png (90.33 KiB) Viewed 3533 times

EVERY channel is reporting crazy numbers, even 21-31 which have no CTs on them.

Every so often, it reverts back to "normal:"

Screenshot 2021-02-22 172752.png (90.33 KiB) Viewed 3533 times

What have I done??

[Teken]

Can you provide an image capture of the various settings in the GEM for review. In the interim power down the unit for ten seconds and bring it back up,

Does the problem go away?

[ben]

You've installed a Micro-CT like a Split-CT it looks like.

- The Micro-CTs don't have an internal burden resistor.
- Ports 1,2/3,4 on any channel are unburdened also.

Putting a Micro-CT on 1,2 or 3,4 of any channel will cause a current high enough to overload all channels.

[TonyPh12345]

You've installed a Micro-CT like a Split-CT it looks like.

BINGO. (I think).

And it was a high-current load, too, the dryer. Putting two and two together, the weirdness stopped when the dryer stopped.

Putting a Micro-CT on 1,2 or 3,4 of any channel will cause a current high enough to overload all channels.

Is my mistake likely to have damaged the GEM?

[ben]

You've installed a Micro-CT like a Split-CT it looks like.

BINGO. (I think).

And it was a high-current load, too, the dryer. Putting two and two together, the weirdness stopped when the dryer stopped.

Putting a Micro-CT on 1,2 or 3,4 of any channel will cause a current high enough to overload all channels.

Is my mistake likely to have damaged the GEM?

No damage should come from that, it's still very low amperage.