Products > Test Equipment

Uni-T launches the UT117C multimeter

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kloetpatra:

--- Quote from: sonpul on July 18, 2023, 06:29:44 am ---kloetpatra, Please, do one test. What is the frequency range of TrueRMS? It is not specified anywhere in the characteristics of ACV Bandwidth. No one in the UT117C reviews measured the frequency range of AC V and AC mV. 1 kHz, 20 kHz, 50 kHz? Or maybe 100kHz?

Does the UT117C seem to have fast 5/Sec measurements?

--- End quote ---
Yes, measurements update rate is 5 Hz. Bar graph update rate is 20 Hz.
BTW: User Manual (p. 20) says: AC * Frequency response: 45Hz~1000Hz
I did some frequency range tests: AC TRMS bandwith seems to be limited to 1 kHz for AC mV range and 10 kHz for AC V range. Still usable within 5% up to 1 MHz.

CosteC:

--- Quote from: kloetpatra on July 19, 2023, 01:42:40 pm ---I did some frequency range tests: AC TRMS bandwith seems to be limited to 1 kHz for AC mV range and 10 kHz for AC V range. Still usable within 5% up to 1 MHz.

--- End quote ---
Can you test it on say, rectangular waveform instead of sine? 1 MHz is amazing, far beyond Keithley 2000, not mentioning UT117C!

mwb1100:

--- Quote from: CosteC on July 19, 2023, 08:22:15 pm --- 1 MHz is amazing, far beyond Keithley 2000, not mentioning UT117C!

--- End quote ---

???

The posted test result at 1 MHz shows the Keithley 2000 slightly better than the UT117C: less than 2% low for the Keithley while the UT117C was 2.5% high.

The Keithley was far better at 1.5 MHz (5% low) than the UT117C (35% low).

shakalnokturn:

--- Quote from: mwb1100 on July 19, 2023, 09:44:56 pm ---
--- Quote from: CosteC on July 19, 2023, 08:22:15 pm --- 1 MHz is amazing, far beyond Keithley 2000, not mentioning UT117C!

--- End quote ---

???

The posted test result at 1 MHz shows the Keithley 2000 slightly better than the UT117C: less than 2% low for the Keithley while the UT117C was 2.5% high.

The Keithley was far better at 1.5 MHz (5% low) than the UT117C (35% low).

--- End quote ---

Don't forget that this is a simple comparison of the readings of 2 multimeters, while the Keithley seems reputable enough and frequencies low enough (at the that point) to stick with kloetpatra's statement that the uni-pee is good up to 1kHz (mV) and 10kHz (V) (sine), we don't know enough about the test setup nor have a known reference to say that one meter or the other is reading high or low into the MHz...

sonpul:
kloetpatra, Thank you very much for taking measurements and building such informative graphs. Very good work. Apparently, UT117C turned out great. If suddenly you have some other comparison results with keithley 2000, for example DCmV, DCV, R, etc. I will be very grateful for the opportunity to see them.
 Very good work. How do you create such charts?

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