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This small self contained unit is the perfect testbox reference. Quick and simple functions accuracy /price performance is well beond expectations. I tested several units over a week and found the maximum error on all of them to be less then 0.ooo1oVolt.at 25 Deg C the best average accuracy was at 23 Deg C . Highly reccomend this for a good fast check. If 'better' accuracy is required for some reason ,be prepared to spend big.
Verified purchase: Yes | Condition: New
Every serious electronics lab, even at hobbyist level, needs some standard to calibrate instruments against. A basic standard is a voltage standard and this is one of the very few available to the hobbyist (although if you still have one of those older 1.35V mercury batteries, hand onto it). Easy to use, dependable (it usually comes with a calibration sheet) this will be of ongoing use.
Verified purchase: Yes | Condition: New
The item came assembled with the paper still stuck to the entire case!! and had to be pulled apart to fix this. Also no previous test paper was included with this product. All worked well when fixed.
Verified purchase: Yes | Condition: New