Altana Hoffman Scratch Hardness Tester Manual Manuel d'utilisateur télécharger pdf (Page 9)

Maintenance and Care

The scratching tool should be rotated between

series of tests to equalize wear; and replaced

when the edge becomes dulled. It is made of

special tool steel and should give long service

on conventional nishes if used properly. Always

approach the nal reading from the lower end

of the scale to prevent overloading and dulling

the cutting edge against very hard substrates.

Do not lubricate the Hoffman Scratch Tester. To

maintain the tester in the best condition, keep it

free from dust and other foreign material. Handle

with reasonable care to prevent damage to the

pivotable beam and store the instrument in its

case when not in actual use.

Maintenance and Care

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Altana Hoffman Scratch Hardness Tester Manual Manuel d'utilisateur Page 9