Submitted 1 year ago by irdc@derp.foo to askelectronics@discuss.tchncs.de
I’ve recently acquired an uncalibrated Philips PM2534 (I may have overpaid…). I’m looking into somehow getting it calibrated. However, the calibration procedure is rather involved, and requires such things as an exact 300V DC (the service manual recommends using such things as a Fuke 5700).
Anybody know of a way to have this multimeter calibrated? I’m a hobbyist and don’t really need such things as traceability and certificates.
Easy, you import this puppy www.ebay.com/itm/305042665748 and set up your own business offering calibration services to recoup the cost. Then you can apply for the calibration engineer position at Minerva.
Jokes aside, have you contacted a calibration lab? I don’t know what it’s going to cost, but I can’t think of another way, if you’re not going to built the sources yourself. There’s one in the Netherlands www.minerva-calibration.com/calibration-service/
It would seem from a quick google that I’m not alone in my conclusion. But at least I have found an article explaining the build of the sources you need wolfalex.bplaced.net/…/calibrator.htm
have you contacted a calibration lab? (…) There’s one in the Netherlands www.minerva-calibration.com/calibration-service/
Their pricing for calibrating a device starts at around €400, which is rather more than I paid for this thing and way cheaper than building my own calibrator
(…) I have found an article explaining the build of the sources you need
Thank you! Not having to invent everything from scratch is going to make this a lot easier.
400? I guess that’s in the ballpark I expected it to be.
I haven’t studied the BOM for the DIY solution, but something tells me that you’ll only be able to keep the cost lower than 400, if you value your time at close to zero.
With all that negativity out of the way, I’d definitely want to build it myself too. Although my anxiety level is exponentially correlated to the working DC voltage and at 300VDC I’m definitely well in the thick rubbergloves territory. Be careful with the build!
rstein@discuss.tchncs.de 1 year ago
How much precision do you want to achieve?
irdc@derp.foo 1 year ago
The device is supposedly a 6½ digit DMM yet I currently don’t even trust the first few digits when comparing it to a 3½ digit handheld Brymen DMM. Being reasonably sure that it’s at least more accurate than the Brymen would be nice, so 3½ digits.
I’ve got another desktop DMM, a 5½ digit GW Instek GDM-8255A, on the way, so I could conceivably just use that one as my local “standard” to calibrate against.
The problem however is that the Philips requires a large amount of references to calibrate against (just calibrating DC voltage requires 0V, 3V, 30V and 300V references). Building all references to recalibrate the whole thing would be rather involved, so I was trying to find an easier way.