How to Compute Electronic Pressure Transmitter Output

The post How to Compute Electronic Pressure Transmitter Output first appeared on the ISA Interchange blog site.

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If a standard electronic pressure transmitter has a range of 50 to 250 psig (345 to 1724 kPa gage), and the pressure is 150 psig (1034 kPa gage), what is the output in mA?

A) 4.0 mA
B) 12.0 mA
C) 13.6 mA
D) 50.0 mA
E) None of the above

<span class="collapseomatic " id="id982" tabindex="0" title="Click Here to Reveal the Answer“>Click Here to Reveal the Answer

Here is the method for converting milliamps to English units:

% span mA = % span eng units

(Reading _mA– LRV _mA)/(Span _mA) = % _Span

% _Span X (Span_eng ) + LRV_eng

Act reading _mA – 4 ÷ 16 x span_eng + LRV_eng = Reading_eng

The correct answer is B.

Source: ISA News