A PPEN D IX E (Cont.)
This lesson has the following trainee enabling objective:
Explain the purpose and function of an M&TE program.
M&TE includes instruments, tools, and devices used to calibrate or verify installed
field equipment. Typically, M&TE equipment is defined as a primary or secondary
standard. A primary standard is traceable to NIST and is environmentally controlled
at the owner facility. A secondary standard is calibrated to the primary and used for
field calibration of installed equipment. Additional discussions on M&TE include
All calibrations of M&TE should be traceable to NIST. The primary standard
is traceable to NIST, the secondary to the primary, and field equipment to the
secondary. The use of primary standards for field use should be discouraged.
Calibration procedures should be used for all primary to secondary
calibrations. Only qualified technicians should perform these calibrations.
The interval of calibrations should be determined based on the manufacturer's
recommendations, the M&TE usage, and the M&TE's historical reliability.
Primary and secondary standards should be stored in an environmentally
controlled area. Issuance of M&TE should be controlled to prevent M&TE
damage due to wrong application, misuse of the M&TE by unqualified
workers, and field calibrations with out-of-tolerance M&TE.
A master list of all controlled M&TE should be maintained to include the
description of the equipment,
discrete identification number,
calibration procedures and periodic interval of calibration, and
ranges of calibration and required accuracy.
Discuss with the trainees the facility's M&TE program.