Products > Test Equipment
New UNI-T UT892 2000V AC/DC High Voltage Multimeter
Martin72:
UT-196 was ordered, when arrived I´ll tear it down.. ;)
Gyro:
--- Quote from: jhoffman on August 29, 2022, 04:43:43 pm ---...
When you consider the PCB real-estate gained by removing current measurement circuitry (inc. the shunt and fuses) it becomes obvious that there is more PCB real-estate available for physical insulation separation to avoid internal HV voltage breakdowns.
I haven't seen a tear-down yet, but intuitively I've formed the opinion so far that this is a good HV voltmeter for $32 USD.
It's sold as a 2kV multimeter which in practice will "probably" work up to 6.0kV with some minor mods possibly required.
...
--- End quote ---
At 6kV, a standard 10M \$\Omega\$ Input divider will be dissipating 3.6W - that requires PCB real-estate and more than minor mods!
It's pointless going past 1kV (personally I would say 100V) with a 10Meg input resistance, the circuit loading gets too high.
Kleinstein:
For the 2 KV range the meter is supposed to have 20 M ohms input impedance. So the higher range is more like with an additional resistor (10 M) in series to the normal divider.
So the divider would see less heat than the standard 10 M divider.
Gyro:
I won't get on to my pet gripe about the 10Meg input resistance cop-out on DMMs then. :D
floobydust:
This multimeter is supposedly for work on VFD's and of course a bit silly in that a 2,000VDC bus yet OVC Cat. II 600V rating makes no sense.
I don't think you'll get that high a DC bus voltage in that AC environment. It's not a MV multimeter.
If you turn on the VFD LPF and look at a phase output, the 20MEG surely needs compensation to really get an accurate RMS voltage.
I'll bet it has none, they cost pennies and the boss will not get his new Lambo.
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