Products > Test Equipment
A look at the Uni-T UT210E
Brian of Romsey:
Hi,
My UT210E has arrived today, pretty reasonable time really.
Does anyone know what the cutoff frequency of the LPF is when VFC is engaged? The documentation only says: "Entering this mode can accurately measure voltage and current which has VFC frequency conversion. Voltage or current response display is true valid value." I'm mostly a DC guy so this isn't a big issue, but still nice to know. The VFC function also seems to affect the stated accuracy of both ACV and ACA. Note that the stated frequency response is 45 ~ 400 Hz for ACV and 50 ~ 60 Hz for ACA
A further, slightly related, question is Is this actually a True RMS meter? That does a proper True RMS calculation? I ask because the specs for ACV and ACA say "Non-sinusoidal wave counts add error by crest factor."
Thanks, Brian.
joeqsmith:
I've never measured it but Google search shows 400Hz. What did you measure?
Martin72:
Hi,
This is what the german ut210-e manual describes :
"Frequency measurement up to 60 kHz (V.F.C. = Voltage Frequency Conversion, e.g. for electronic
actuated drives)"
joeqsmith:
--- Quote from: Martin72 on July 28, 2020, 08:01:18 pm ---Hi,
This is what the german ut210-e manual describes :
"Frequency measurement up to 60 kHz (V.F.C. = Voltage Frequency Conversion, e.g. for electronic
actuated drives)"
--- End quote ---
Using the same clamp in my previous post:
https://www.eevblog.com/forum/testgear/a-look-at-the-uni-t-ut210e/msg3155612/#msg3155612
In the standard mode, I measure the 3dB point at 2.8KHz. I typically suggest they are good for about 2KHz. With VFC active, the 3dB point moves down to 660Hz. I'm sure some are better and others worse but the 400Hz I found with Google seems to be in the ballpark.
Brian of Romsey:
Joe,
Thanks for some definitive information, even if it is just what you've measured. I've hand annotated my 'documentation' to match. :)
Cheers, Brian.
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