Range of Pressure Transmitter

G

Thread Starter

Gafoor

Pressure Transmitter range is 0-100 bar. however vendor has offered calibrated range 0-100 bar and instrument range is 0-275.8 barG. we need turn down ratio 100:1 and accuracy 0.1% of span. is it affect accuracy???
 
Everything effects 'accuracy'. Everything like temperature, aging, line pressure, hysteresis. So, the answer is, "Don't know. It depends on the brand and the model."

You need carefully read the spec sheet of the device very carefully. You'll notice that all the smart transmitters accuracy specifications include some form of 'breakpoints', where, for instance, the main published accuracy is good to say 20:1 turndown (arbitrarily) from maximum range, but a formula for calculating accuracy is given for ratios greater than 20:1. Sometimes more than one formula.

Do the calcs.
 
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