Blue-Point EETA502 DCA/ACA Clamp Adapter

[xladkalkd]

I have this clamp meter adapter that's used with a multi-meter and trying to figure out if it's working.

I don't have the instructions. The front besides the p/n has (Output 1mV/A)

I connected the clamp adapter to my Fluke meter and place the clamp over one of the AC lines (connected to 110/120 outlet) to a running 1500 watt heater set to low.

The clamp adapter has an a DCA zero adj. If moved the reading goes from approx. -115 to -21.

I don't know how to use or test the clamp adapter with a dmm to produce the correct amps and determine if it's working.

 

[xladkalkd]

I think I may have figured it out or perhaps the clamp adapter started to work correctly? I don't know.

I'm not certain if there's a certain order to turn on the meter, connect the clamp to a dmm and a wire?

Anyway this last time testing, the clamp adapter was OFF and then clamped to one of the AC wires connected to 110/120 outlet and a running 1500 watt heater with a high and low setting, dial to increase/decrease temp and a fan.

Connected the clamp to a fluke dmm (V) and (COM) and set the dmm's selector to V (ac)

Then turned on the Clamp adapter to 200 amps. The heater (already running) was set to low and the dmm read "11" (mVac) setting the heater to the high the dmm reading is "12.5" (mVac)

So it appears the heaters using 11 amps while on low and 12.5 amp while on high.

Which is about right as 1500 watts @ 115 Vac = ~13 amps.

I still need to test it connected to DC, but it appears to be working unless there's some sort of intermittent problem.

 

[xladkalkd]

Now the clamp isn't working as expected. This morning I'm not able to get it to zero out or take an AC reading.

Perhaps there's something wrong with the clamp. A few times I was able to zero it out and get an AC reading while other times I wasn't able to zero out and there was no relevant readings.

Sometimes the clamp range is from approx. -0.016 to -0.115, so there's not way to zero it out.

A few times the clamp range has been +0.040 to -0.110 and i was able to zero it out.

 

[Bobioz1]

Not familiar with that clamp but your meter should be set on DC millivolt scale. As in 10mv = 10 amps. DCA zero adjust (for DC measurement only) is for getting the meter to read zero before you clamp the wire.