I'm playing around with a used digital multimeter, a kind of nice auto ranging, data logging, TRMS type, Extech brand. I think it's way out of calibration. When I meter a household receptacle with my cheap harbor freight DMM, I get 120VAC. With the other TRMS I get between 85-90VAC.
Have any of you sent your more expensive meters out for calibration? I'm waiting on a few quotes from some labs. I'm curious to see if it's economical to have it done, or if I should just pick up a new one from ebay.
I really don't need a TRMS datalogger, but you guys always have me wanting bigger & better stuff!!!
Thanks
Chris