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Author Topic: U1272A - Yay!  (Read 31633 times)

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Offline zaoka

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Re: U1272A - Yay!
« Reply #50 on: September 21, 2011, 12:03:43 pm »
Just got one of these from ebay (open box), everything work perfect except ZLOW, with no test leads it shows 6.5V AC, DC is 0V...

???

They should install display with better contrast (its to dark) and make that switch have better feel (like old Triplett meters :))
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Offline Kiriakos-GR

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Re: U1272A - Yay!
« Reply #51 on: September 21, 2011, 03:05:49 pm »
Z-Low defaults at the range 1000V AC ....  in this range there an indication of 4.7V in my unit.
The True RMS IC controller cause a minimum leak.

Some manufacturers compensate this minimum leak with software tricks, some others do not.

The Fluke 28II reads 2V ( 1000 ACV range) and by it self it zero out this reading in 5-8 seconds.






 
   
« Last Edit: September 22, 2011, 01:57:57 am by Kiriakos-GR »
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Offline PetrosATopic starter

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Re: U1272A - Yay!
« Reply #52 on: September 22, 2011, 12:05:37 am »
Mine shows 7.5-8.5V in ZLow mode. Like Kiriakos said, it's because it uses the 1000V scale and doesn't do correction. Once you connect it to a voltage source, it will read correctly. Nulling mine seems to introduce offset error.
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