Avo EA113

[Sinewave]

Right, so some tests tonight tell me that....

This meter does likely have what appears to be the common DC amplifier fault.

I have it right now connected up to my calibrator and it is reading in AC.

Results as follows:

• 0.01V range appears too noisy to test.
  
• 0.03V reads 15% high FSD
  
• .01V range reads 11% high FSD
  
• 0.3V range reads 11% high FSD
  
• 1V range reads 10.6% high FSD
  
• 3V range reads 10.6% high FSD
  
• 10V range reads 10.7% high FSD
  
• 30V range reads 10.5% high FSD
  
• 100V range reads 10.3% high FSD
  

Then on the 300V range things took a turn and the calibrator didn't like it and shut down.

Quick check with a fluke shows the calibrator is fine to test the 300V and 1000V ranges, but something has occured inside the EA113 during the tests as now it appears to be shutting the calibrator down on any AC voltage range.

I think the EA113 could take a sinister turn if I tried it on the variac, as the calibrator appears to be protecting the EA113 from some kind of impending doom.

So, there's another little thing for me to work out.