Joe, Do you have any data about prior measurements of these cells or their history?
I read somewhere there is a predicted decline rate based on time and temperature IIRC. Once you get the meter calibrated, you can 'track' their measurements. Might also be time for a 'differential voltmeter' to add to the 'stable'. Joe -----Original Message----- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Joseph Gray Sent: Monday, August 26, 2013 9:59 PM To: Discussion of precise voltage measurement Subject: [volt-nuts] Old Weston cells I got my hands on a few very old, unsaturated cells. I figured that they would be no good after all this time. Just out of curiosity, I measured them on my 3457A, which hasn't been sent off for calibration yet. DMM was set to 3 V scale to keep the input impedance high. Room temperature = 26 C. Cell #1 = 1.018288 Cell #2 = 1.018236 Cell #3 = 1.018224 I read that when they get below 1.0183 V, they are no good. Is there any (easy) way to rejuvenate these cells? Joe Gray W5JG _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.