Products > Test Equipment

DT9939 Calibration

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dseyst:
Does anyone know the procedure to calibrate the DC voltage range of this meter?

retiredcaps:
How much is your meter out by?

dseyst:
Believe it or not, more than my UT61e. It's not so far out that I would consider it a problem, but if I could calibrate it I would. Otherwise I'll live with it. I got it off eBay for under $100 (new).

retiredcaps:
What is your voltage reference that you are using?  Is the DT9939 within its specification?

dseyst:
I'm using one of those cheap AD584-M voltage references.I can list the references and the results fromt the two mentioned meters. I do believe the DT9939 is within specs.

REF 2.49923  DT9939 2.4980  UT61E 2.499
REF 4.99852  DT9939 4.994  UT61E 4.998
REF 7.50045  DT9939 7.494  UT61E 7.500
REF 9.99918  DT9939 9.992  UT61E 9.999

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