I ran a stability test on my "new" 732A and 3458A units. I had both connected together (using copper wire leads) and I randomly ran measurements of the 3458A reading of the 732A 10 VDC output. I did an ACAL DCV before each reading and used NPLC of 100 and 8 digit readings , and recorded the room temp, 3458A internal temp , and the MIN/MAX/MEAN/STDDEV of the 3458A readings, and the thermistor value of the 732A.
The room temp varied from 22.1 to 27.9 C over the several days of measurements. The 3458A internal temp was, on average, 13.7 C higher than the room temp. The end result was a temperature sensitivity of 1.15uV per degree C of the 3458A internal temp, or .115ppm/C. I am assuming the 732A is relatively stable over the changing temperature range (the thermistor varied from 3666.6 to 3670.7 ohms) and attribute most of the variance to the 3458A. The absolute value of the readings are around 10.000058 VDC but neither unit is calibrated. I assume they can be calibrated but I wanted to make sure they are stable first. Do these numbers look reasonable and do they indicate any issues with the units? Thanks, Randy Evans _______________________________________________ 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.