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After considerable heavy use the washers may age and no longer have their original characteristics. The
washers may also become distorted and permanently damaged if the tester is tightened fully, beyond the
length of the engraved scale on the barrel.
In this instance the force recorded by the tester should be checked and, if necessary, the tester should be
returned to Elcometer for fitting of a new set of Belleville washers and re calibration.
Calibration
Calibration checks to ensure that the correct load is being applied to the dolly will be required periodically.
Elcometer can conduct these checks and a calibration certificate traceable to national standards can be
issued.
6 TECHNICAL SPECIFICATION
2
N/mm
(MPa)
1
0.5 to 3.5
2
1 to 7
3
3 to 15
4
5 to 22
5
0.05 to 0.2
Range
2
kg/cm
5 to 35
100 to 500
10 to 70
200 to 1000
30 to 150
500 to 2000
50 to 220
500 to 3200
0.5 to 2.0
2
lb/in
5 to 30
R
9
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