CALIBRATION OR CHECK PERIOD FOR MEASUREMENT
GAUGES, INSTRUMENTS OR EQUIPMENT
The periods below are the maximum length of time between calibration. They may
be shortened for individual gauges or instruments in cases of excessive use, or critical
application.
An item can be calibrated up to 2 months early but should not go over one month late.
0-6 vernier micrometer (mechanical or electronic models)
6 months
0-larger than 6” verniers
1 year
0-1” gap micrometers
6 months
0-3” gap micrometers
6 months
0-greater than 3” micrometers
1 year
Depth & height micrometers and dial test indicators
6 months
Engineers squares, straight bars, spirit levels, etc.
1 year
Precision slip gauge set (master)
2 year
Precision slip gauge (working)
6 month
Surface tables
2 year
3 co-ordinate measuring machines
6 month
Theodolites, pedometers, ………
12 month
Mercury thermometers
Calibration on
receipt only
Measuring jugs, instruments and tubes
Calibration on
receipt only
………………. equipment. Calibration is not required as is self
12 month
checking. Service only
CAD plotter or printer (only where drawings or charts are used
6 month
directly for marking out or measuring)
Bourdon tube pressure gauge
6 month
Electrical temperature, pressure gauges or charts
12 month
Lorry tachometers (specified legal requirement is)
……….. month
Voltmeters, ammeters, etc.
6 month
Plug, ring & fixed gap gauges
1 year
Adjustable gap gauges
6 months
Weights & Scales
1 year
Form ……. : Issue ..…..
Dated ……/……/200…..
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