Products > Test Equipment
UNI-T UT61E Multimeter teardown photos.
gatos:
I know that about UltraDMM, but I wanted to honor the author of the software by testing it since he proposed it!
I am absolutely sure that my meter has no problem in the frequency measurement (triple checked with other multimeters).
The problem lies on the software (the software of Uni-Trend as well-see my previous posts).
gatos:
Dear sirs,
I have one question for you. I own an old Summit SDM383 (non TrueRMS), a recently bought Vichy VC99 (non TrueRMS) and a recently bought UNI-T UT61E.
I friend of mine brought a Fluke 79 III, so I took advantage to take some measurements.
230V AC UPS output 12V DC 1.5V DC 200Ohm Resistor
(grid outlet) (modified sinewave) (old 23A battery) (AA battery) (2%)
79III 237 235.5 9.5 1.469 199.8
SDM383 234 205 11.08 1.485 193.8
VC99 237 205 11.02 1.468 200
UT61E 238.5 236.3 11.03 1.468 199.87
Unfortunately Fluke has not been calibrated for the last 4 years.
Do you consider wise to “calibrate” my other multimeters according to Fluke measurements?
Especially for the 23A battery, I think Fluke puts a lower resistance so it draws more current from the battery trying to show if the battery is able to deliver power. I won’t change anything here.
I am looking forward for your valuable opinions.
T4P:
It looks painfully obvious NOT to calibrate according to the Fluke especially when it doesn't have less accuracy rating than the UT61E plus it hasn't been callibrated for 4 years
It doesn't look obvious enough?
Lightages:
Never adjust one meter to another without knowing which is correct. One of the multimeter check devices from Doug at voltagestandard.com is a worthy purchase for anyone worried about the accuracy of their measurements. They aren't very expensive and seem to be reliable.
Just because the one meter is a FLuke does not mean it is more accurate than the UNI-T.
Monkeh:
--- Quote from: gatos on February 24, 2013, 01:48:31 pm ---Especially for the 23A battery, I think Fluke puts a lower resistance so it draws more current from the battery trying to show if the battery is able to deliver power. I won’t change anything here.
--- End quote ---
Why don't you check that? Because it should be the same impedence. Which means the Fluke is badly out of spec on DC volts.
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