| Products > Test Equipment |
| Easy way to test the calibration of a DMM (Fluke 45)? |
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| Majorassburn:
Thank you. I should have known better. Sorry. |
| CalibrationGuy:
DISCLAIMER: I don't know Doug, just bought one of his 10V references from voltagestandard.com. Base cost is $140. I dusted the unit off and measured it. Attached is the picture. Just to put things in perspective for those perusing threads like this one. First of all, I paid over $2,700.00 to calibrate that meter. The cable attached to the meter and the reference box costs more than the reference. People measuring the Chinese/Asian boxes do NOT (most likely) have the capabilities that my lab has, so PLEASE take their observations with a grain of salt. They are well meaning, but measurement procedures/traceability DO matter. As a hobby, it is great to share experiences, but observations may be misleading without intending to be misleading. Final thoughts, I'm impressed with Doug's device, I know it's out of the OP's price range, but I just thought I would show you how mine held up as measured with a calibrated, certified, accurate 3458A. TomG. |
| shabaz:
It would be a complete waste of time and money spending $140 plus £2700, when the OP could simply send his meter in for a calibration check for under $100. You'd need to be calibrating a _lot_ of equipment per year before that made any sense. The OP observed a 20 mV discrepancy between meters. That doesn't require a 10.0000V standard to determine which instrument is faulty. The OP could simply buy several calibrated meters, new, each year, and it would be cheaper than that. |
| KungFuJosh:
--- Quote from: shabaz on April 02, 2024, 07:44:10 pm ---It would be a complete waste of time and money spending $140 plus £2700, when the OP could simply send his meter in for a calibration check for under $100. --- End quote --- That wasn't his point at all. His point was that the reference for $140 is surprisingly accurate. Also, where can he get his DMM calibrated for under $100? (besides bdunham7 that offered to do it for free) |
| CalibrationGuy:
I think you completely missed the point of my reply. As I said, it's out of range of the original poster's budget but I was just showing a contrast to the expense required to definitively get precision data. TomG. |
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