// My serial number is: MY45044988 Hi Miguel,
your S/N can be found in the Keysight database. Your instrument was sent to customer on 15.12.2009, order number 2856337. No calibration documents, or newer calibration data are available.
So it's now nearly 10 years old, and you should definitely save the content of the CALRAM, and maybe already change the DALLAS chips. These might last another 5 years, but nobody can make sure. If it has been used for 7-8 years, maybe w/o calibration, its LTZ1000A reference has already drifted a lot, so a calibration is required.. or you know some volt-nuts who has access to a known / calibrated voltage reference to check.
You might also check CAL?72 over one week, according to SN18, which requires constant room temperature, and a constant external reference to check staibility of its internal LTZ reference.
All instruments might be affected to more or less extent by this A/D converter drift problem (U180), so that's what Illya is referring to.
Also the LTZ1000A reference might need some time to recover, because it might show some hysteresis or rush-in effect after 2 years storage.
If you want to get a proper calibration anyhow, you may also set the oven temperature lower, to 65°C as explained, and then send it out for calibration. Or if you already have a stable external reference, you can preliminarily copy the calibration after changing the oven.
Frank _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com and follow the instructions there.
