Accuracy class issue of the ROSEMOUNT3051 transmitter
Thread Content
Does anyone know what the accuracy class of the ROSEMOUNT 3051 transmitter is? I checked the manual for the ROSEMOUNT3051 transmitter; it states that the reference accuracy can be 0.075%, while another section says that the CD1 version can achieve an accuracy of 0.0685%. So what is the actual accuracy? Is there really such high precision? If it were really that accurate, even the standard tables we use for regular calibration wouldn’t have such high precision. What is the accuracy class of the ROSEMOUNT 3051 transmitter with double flanges?
The accuracy grades of the ROSEMOUNT3051 transmitter are 0.065% and 0.04% (high precision); the accuracy grade of the double-flange version of the ROSEMOUNT3051 transmitter is 0.075%
I don’t even know how to conduct the verification; the accuracy of these instruments is now much higher than that of the original standard devices. When taken for inspection at the Technical Supervision Bureau, they are usually downgraded for use
The 3051S can achieve 0.025% with a range ratio of 200:1; the 3051 can achieve 0.065% with a range ratio of 100:1
1. The precision of various models in the 3051 series varies; high-precision models can reach 0.04%. 2. A pressure calibrator can be used for calibration, with an accuracy of 0.025% FS.
The 0.075% accuracy is specified relative to the maximum range; if the gauge you choose is not used at the maximum range, the accuracy for that specific range must be calculated. For detailed calculations, refer to the selection guide
It’s also 3051, but different categories have varying levels of precision; I believe that the precision of double-flange instruments depends mainly on the flanges and capillaries.
It happened to be a major maintenance period, with technicians checking the 3051 transmitters. I asked them about the accuracy issue, and they told me that the typical accuracy of ROSEMOUNT 3051 transmitters is 0.075%. Precision pressure gauges, used as reference instruments, can only achieve an accuracy of 0.4 or 0.25 grade; therefore, the 3051 transmitters are used at a reduced accuracy level of 0.5 grade, which makes it possible to perform calibration.