Products > Test Equipment

Easy way to test the calibration of a DMM (Fluke 45)?

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Fried Chicken:
Yes yes I noticed that.  I excitedly just got it mounted in my station and just took measurements right after having done a brake fluid flush on a car and had some beer.  I'm still running around like a chicken with its head cut off (lol bok bok).  I'll do some more testing stuff.

So professional, so nice.  Love the calibration sticker

Fried Chicken:
And all these pictures came in a dogshit order.  I apologize, these pictures are probably meaningless.  I might format them properly, or host them myself.

KungFuJosh:

--- Quote from: Fried Chicken on April 14, 2024, 12:06:17 am --- I'm still running around like a chicken with its head cut off (lol bok bok).

--- End quote ---

Fried, I assume.

J-R:
I vote for posting a couple photos because it's always fun to see people's setups, but make them smaller because they are grainy anyway and we don't need much detail.  The smiley sticker is fun, nice.

Then for the measurements, just make a table with values from both DMMs so we can compare, no need for those photos.  And as mentioned don't use the AutoV mode so you get all the digits of resolution on the Hioki.

Fried Chicken:
Got some more time to dick with the unit.

The inexpensive but seemingly well built power supply I have has fixed outputs for useful voltages.  My guess is it intentionally errs on the conservative side for safety, but who knows.  Maybe now I can calibrate it that I have a calibrated and hopefully reliable multimeter.

DC Voltages:

Here it's measuring at "5 volts":

Hioki: 5.174v
Fluke: 5.163v



And at the "12 volts" output:

Hioki: 11.81v
Fluke: 11.804v



And at the "-12 volts" output:

Hioki: -12.10v
Fluke -12.086v



And I managed to get it in the mV scale using the variable voltage option on the cheap but seemingly well built DC power supply.  The Fluke 45 cuts out of the mV range relatively early, the Hioki goes up to 600mV:

Hioki: 276.1mV
Fluke: 275.58mV




High Voltage AC:

I don't have any good high voltage sources besides the wall, so that's what I used.  While I could have measured them simultaneously, I decided against doing stupid shit.

Hioki: 120.8v @ 59.98Hz
Fluke: 120.63v @ 60.02Hz
Ercot: 60.014Hz

Here is the Hioki:


And the Fluke:


And the power company:




Blah, the pictures didn't come out how I like them.  I wanted expanding thumbnails not links to full images.  I don't think I can do expanding thumbnails inline.

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