when the equipment listed in table 5 is not available. The items selected must be verified
to perform satisfactorily prior to use and must bear evidence of current calibration. The
equipment must meet or exceed the minimum use specifications listed in table 5. The
accuracies listed in table 5 provide a four-to-one accuracy ratio between the standard and
TI. Where the four-to-one ratio cannot be met, and actual accuracy of the equipment
selected is shown in parenthesis.
d. Accessories Required
The accessories listed in table 6 are issued with the secondary reference calibration
standards set and are to be used in this calibration procedure. When necessary, these
items may be substituted by equivalent items unless specifically prohibited.