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How Can I Calibrate a Voltmeter?
Posted on 3/10/15 at 9:33 pm
Posted on 3/10/15 at 9:33 pm
I have a good number of voltmeters at work and want to calibrate them periodically...not really wanting to continually send them back to the manufacturer for calibration...
is there some type of standard that I can calibrate them against?
is there some type of standard that I can calibrate them against?
3
Posted on 3/10/15 at 9:48 pm to Spankum
buy an expensive meter with higher resolution than your other meters and send that one off to be calibrated. then compare your other meters against it as a reference on a set schedule. if the meters are within tolerance, keep them in service, if they arent, send off for calibration.
also there are many 3rd party calibration companies that are cheaper.
also there are many 3rd party calibration companies that are cheaper.
This post was edited on 3/10/15 at 9:50 pm
Posted on 3/11/15 at 8:49 am to Spankum
I agree that calibrating your "best" one and using that as a reference is a good solution.
Other than that, you should probably ask yourself how accurate do they really need to be? Obviously if you need accuracy down to milliVolts, then they need to be calibrated periodically.
I know that for me, the majority of the measurements I make are sanity checks...does the reading on the multimeter generally match what I am expecting. So if I'm expecting 3.3 Volts and I read 3.5, I' m OK with it. If I don't get close to what I'm expecting, I'll hook it up to my variable voltage bench power supply for a quick check to make sure it is functioning properly.
Other than that, you should probably ask yourself how accurate do they really need to be? Obviously if you need accuracy down to milliVolts, then they need to be calibrated periodically.
I know that for me, the majority of the measurements I make are sanity checks...does the reading on the multimeter generally match what I am expecting. So if I'm expecting 3.3 Volts and I read 3.5, I' m OK with it. If I don't get close to what I'm expecting, I'll hook it up to my variable voltage bench power supply for a quick check to make sure it is functioning properly.
This post was edited on 3/11/15 at 8:50 am
Posted on 3/11/15 at 10:06 am to Spankum
Depends on your location, but there is a local place in Baton Rouge that offers calibration services. I use to work there. They offer repairs, calibration and certification. Depends on the brand and model as far as pricing goes. But you can call and get a quote, if you have a good amount of equipment they may be able to offer a discount. Though, don't quote me on that. Company is JM Test Systems. They also have a few other locations. You can drop off at most or ship.
Posted on 3/11/15 at 10:45 am to TMNtailgater
We send our handheld multimeters to ATS. Regular price is $75.
Posted on 3/11/15 at 8:28 pm to h0bnail
Probably more than you want to spend but they make those hand held calibrators. If you don't have to be super accurate you can use one of those and only have to pay to keep it calibrated
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