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How can one calibrate a multimeter, like a UT61E or any other multimeter in the 50 ~200 $ pricemark, when one does NOT have an expensive FLUKE nor a friend who has a FLUKE)

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possible duplicate? electronics.stackexchange.com/questions/5507/… –  csadam Jan 25 '11 at 13:11

3 Answers 3

up vote 3 down vote accepted

Very generally and at the most basic, you need a precision voltage reference and resistors. Obtaining 0.1% is fairly easy, for resistors it's straightforward, and for voltage references look up "precision voltage reference" (something like this), and bias it with 0.1 to 1 mA.

The actual calibration procedure will vary from meter to meter, so you will need to dig up the appropriate documents.

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Basically, there are lots of adjustable resistors on the multimeter PCB - don't forget to mark original positions of all of them before you start.

You ether get a precision resistor references (read datasheet on temperature coefficient), or find a guy with precision equipment in your city to compare the readings.

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Send it to me, and send money for shipping back. I have 8.5 digit multimeters (0.0007% basic accuracy) and appropriate calibrators.

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-1 This is not a place to advertise your services. Realizing you didn't actually include your contact info, that makes the answer only a joke, and not useful to OP or later readers. –  The Photon Nov 25 '12 at 18:50
That said, for OP's benefit, in any city with a reasonable electronics industry, there should be several commercial calibration services available. If you don't live in a city like that, it just means you have to ship your equipment off for calibration, instead of having it done on-site. –  The Photon Nov 25 '12 at 18:52

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