This is from PTEC Instrumentation book The dp cell transmitt

The d/p cell transmitter converts a proccess variable measurement into a standard instrument____. Value Signal Pressure Difference None of the above A differential pressure transmitter can be used to measure differential pressure as well as infer Temperature Density Level Flow Pressure All of the above The most common electronic instrument signal used in process industries is expressed in Millivolt Milliumps Pounds per square inch Span c. Range I/P transducers arc commonly used in the process industry with_____ actuated valves. Electronically Digitally Electrically Pneumatically None of the above What is the term used to describe the conditions where the LRV of a standard instrument signal is greater than true zero Positive zero Live zero Integral zero Zero span In a standard I P transducer, an 8-mA input corresponds to of output 4 psig 6 psig 9 psig 7.2 psig A temperature transmitter uses a thermocouple sensor and is calibrated 100 T- 300 degree F as a 4-20-m A output signal. If the fluid temperature is 200\"F. what is the output signal in mA 8 10 12 18 In order to increase production rate, a reactor setpoint was increased from 160 psig to 190 psig. The reactor pressure transmitter was recalibrated from 0-200 psig to 0-300 psig. What is the percent span for the old and new setpoints 50% 63% Remember In an operating unit, when a transmitter is recalibrated, the scale must be changed on the controller as well as the controller retuned. New gain =

Solution

2- c pressure

3 - b density

4 - c pounds per square inch

5 - d pneumatically

6 - d zero span

7 - b 6psig

8 - c 12

9 - a 25%

10 -b 6psig