Calibration of M&TE

DOE-STD-1054-93

3.4.4.3

Calibration of M&TE - On Site

All M&TE on-site calibration should be done using plant-approved

procedures. These procedures should include the following items:

identity of the equipment to be calibrated

calibration equipment and reference standards to be used

precautions and limitations

checks, tests, measurements, acceptance tolerances, accuracy,

precision, range, and specific parameters

step-by-step instructions regarding sequence, methods, data

sheet completion details, etc. (including as-found and as-left

conditions)

special instructions, such as environmental conditions, when

appropriate

reference standard used should have an accuracy at least four

times greater than the device under test. If this accuracy ratio

cannot be met, analysis of the errors should be estimated to

provide a valid uncertainty of the calibration process.

M&TE calibration data sheets should include provisions for recording

as-found data before any adjustments or repairs are made. Completed

data sheets should be reviewed, by the standards laboratory supervisor,

prior to release of the equipment to service to verify that acceptance

criteria are satisfied. When M&TE is found to be out of calibration

(gross error), an evaluation should be performed as described in

Section 3.4.5. Completed data sheets should be filed with the

maintenance history.