mbartoli
Member
I concur with the majority sentiment here... the RTD itself cannot be calibrated, only compared to a certified standard. We use Rosemount RTD transmitters (4-20mA)here by the hundreds; our Metrology lab will annually calibrate the transmitters with a certified standard. Our installation standard for RTD instruments specifies termination at the instrument and PLC only, with no intermediate termination points. This minimizes the possibilities of a poor connection affecting the reading.