Measurement comparison between a commercial high resistance bridge and validated systems at ultra-high resistance values
Abstract
At the National Institute of Metrological Research (INRIM) a comparison between the measurements of a commercial high resistance bridge and two validated high resistance methods from 100 GΩ to 1 PΩ has been performed. The systems showed satisfactory agreement except at 1 PΩ. The commercial bridge recently has been improved by means of a new software revised by the manufacturer according to the INRIM requests. This software allows the automatic calibration of the DC Voltage sources of the bridge, with a high precision DMM, taking into account these calibration results in the subsequent resistors calibrations. With the previous software version, bridge measurements at INRIM were limited at 10 TΩ Also the bridge uncertainty specifications were updated, now being more reliable with respect to their first issue.
Event details
- Event
- tc4-2020