The вЂњrangeвЂќ of a transmitter is simply the input values associated with 0% and 100% output signals (e.g. The goal in doing this is to ensure accuracy of measurement. The вЂњzeroвЂќ and вЂњspanвЂќ adjustments together deп¬Ѓne the mathematical relationship between sensed pressure and current output.Д¬alibration of an analog transmitter consists of applying known (reference standard) input stimuli to the instrument, and adjusting the вЂњzeroвЂќ and вЂњspanвЂќ settings until the desired current output values are achieved. To begin, we will examine a block diagram of an analog pressure transmitter showing the zero and span adjustments, with analog signaling between all functions inside the transmitter: Unlike analog instruments, where the вЂњzeroвЂќ and вЂњspanвЂќ adjustments completely deп¬Ѓne the instrumentвЂ™s calibration and range, calibration and ranging are two completely diп¬Ђerent functions in a digital instrument. Calibration and ranging for a FF device is similar in principle to any other вЂњsmartвЂќ measurement instrument.

Rosemount 3095 calibration procedure