Strange offset in Fluke i410.

[vini_i]

I'm borrowing a coworkers Fluke i410 clamp on amp meter. The clamp has a strange offset that can't be zeroed out.
Without the clamp connected to anything, both a Fluke multi meter and a Rigol scope show an offset between 250mV and 2V.
This is too much offset for the knob on the from to zero out. Further some percussive maintenance causes the offset to jump around.
Repeatedly turning the clamp on and off also can cause the offset to jump around. The other day the clamp was acting up but eventually started showing correctly.
Today i can't get it to behave at all.

The battery is brand new and reads 9.45v unloaded. I have not tried reading current with the clamp. It was calibrated in march of 2016 (sticker on the front).

What could be wrong with it? Is this a know issue with these clamps? Is it repairable?

[mos6502]

Maybe the ferrite got magnetized. Try opening the clamp and letting it snap shut a couple of times.

[Jeroen3]

If you've used it to measure high current DC pulses you might have magnetized it. Try some high current AC and it should recover.
Or there could be debris preventing it from closing snugly.

This works with our i30s at least.

[vini_i]

I opened up the clamp and took a look at the circuitry. The ON/OFF push button looked like the solder joints were cracked. I touched it up with a soldering iron. It works like a champ now.