Best I can tell, the 3457A 1 year spec is 0.0040% of reading + 19 counts for 6.5 digits on the 30V scale, 100PLC, cal temp +/- 5 deg C.
Your 10.00036 V reading is therefore +/- 0.00059 V. I'd say you can't really tell with the 3457A whether the 732A is close or not. Orin. On Fri, Mar 7, 2014 at 4:19 PM, Michael Hong <[email protected]> wrote: > Hi nuts, > This is my first message. Just reading the posted messages is a big > learning to me so I didn't post but instead trying to read all. > > Here is my issue. > > I received a Fluke 732A yesterday which was purchased from an eBay seller. > > > (1) > I plugged in and started measuring the 3 voltages and thermistor > resistance value. > After about 2 hours later all 3 voltages were stabilized and thermistor > value stabilized after 24 hours. > > All voltages and thermistor values were measured on a HP 3457 which was > calibrated and certified by a local cal lab 10 months ago. Here is how I > measure: After changing the connection to a different voltage I wait 30 > second. I start STAT and wait 1 minute and R MEAN. > > 10V (10.000360 36.0ppm, 360uV) > 1V (1.0000383 38.3ppm, 38.3uV) > 1.018V (1.0180200 20ppm, 20uV) > > According to the manual adjustable(calibration) ranges are: > 10V 5ppm 50uV > 1V 5ppm 5uV > 1.018 50ppm 50uV > > So obviously either 732A or 3457A is wrong. > I tried to contact the person who calibrated the HP 3457A. No response. > > (2) > No light on BTRY CHG and IN CAL > Rear panel Battery Operation switch is on. > > (3) > Front panel calibration hole > I put a thin flat blade driver into the holes. I couldn't feel anything > until 4 1/4" inside where I felt something but not the potentiometer. > > > > I offered to the seller that if I find the 732A is no problem but only > requires the new battery, refunding $150 for the battery will close the > deal. All other case, I return the item. > > He responded "Just return it." > > My questions: > (1) Which one is wrong the DMM or 732A? > (2) What is the cheapest battery replacement cost? > (3) Were the calibration mechanism removed or they are there? In manual I > couldn't find any detailed description or diagram of it. > > Last, I paid $650 plus $35 shipping. Do you think it is worth without > battery, if voltages are in the range? > > Michael > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
