> IMHO everything that measures something should be subjected > to periodic calibration being it a 5-digit precision laboratory voltmeter > or cheap piece of junk like ups, both can benefit from being > calibrated with higher precision instrument (not only to improve > measured values but also to determine the errors and repeatability > of the measurement)
Your UPS reports a zero based 8-bit value for the battery voltage, which is about 210 bins at a real value of 13.6V. This gives it a resolution of almost 65mV. No calibration in the world can improve that. Even when assuming zero non-linearity error and -tolerance, this is already way too coarse to use this to base any action upon when it comes to 12V lead-acid batteries. If users have a clue to decide if a reported battery voltage of 13.5V would be good or bad in the first place anyway. My point is, it would be measuring without meaning. > Hopefully the model detection will make it and at least the coarse > conversion factor would be there for cyberpowers and others that > need it. I'll be happy to include this if CyberPower can confirm that this adjustment is applicable to all 0x0501 productid's, both past *and* present models. Best regards, Arjen _______________________________________________ Nut-upsuser mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/nut-upsuser
