Chapter 4: Calibration Procedures & Documentation

The industry standard output for a transmitter is   ?  .

• 0-10 VDC

• 0-10 VDC

• 1-5 VDC

• 4-20 mADC

Proper instrument calibration is essential for a process to   ?  .

I. Increase energy consumption
II. Maintain regulatory compliance
III. Operate efficiently
IV. Prevent hazardous material release to atmosphere
V. Produce products of consistent quality

• I. and III.

• II., III., and IV.

• I., II., III., and V.

• II., III., IV., and V.

The instrument calibration procedure is based on   ?   a known accurate signal with a signal of   ?   accuracy.

• comparing / unknown

• measuring / proper

• recording / high

• varying / moderate

The mathematical difference between the upper range value and lower range value of an instrument is defined as   ?  .

• accuracy

• gain

• range

• span

Determine the span of an instrument with a lower range value (LRV) of 38 psi and an upper range value (URV) of 209 psi. (Round the FINAL answer to the nearest whole number.)

Determine the span of an instrument with a lower range value (LRV) of 32 "H₂O and an upper range value (URV) of 136 "H₂O. (Round the FINAL answer to the nearest whole number.)

Determine the accuracy of an instrument with a maximum deviation of 0.2 mADC and an output span of 16 mADC. (Round the FINAL answer to two decimal places.)

What type of instruments must be calibrated in the actual working environment?

I. Capacitance level probe
II. I/P transducer
III. Liquid level float switch
IV. Pressure transmitter
V. Temperature transmitter

• I and II

• I and III

• II and V

• I, II, and V

What procedure should the technician observe before connecting air tubing to test equipment?

• Add a couple drops of oil for lubrication.

• Blow clean and dry air through the lines.

• Remove ear protection to listen for leaks.

• Run water through the line to remove contamination.

The acronym   ?   represents a federal agency that maintains and develops standards for measurement in the United States.

• API

• FDA

• NIST

• NRC