5
INSTRUCTIONS FOR USE
1.
Having taken the test hammer from its case, gently push the piston inwards
pressing it against a stiff surface (held the hammer with both hands when using
it). The piston will release itself from its catch and emerge from the body of the
device which will then be ready for testing.
Press the piston against the surface of the material to be tested, holding the
device perpendicularly to the surface. Gradually apply increasing pressure until
the mass impact is released. Keep the device firmly pressed against the surface
being tested and look at the rebound reading on the scale
.
Do not touch the
side button whilst pressing on the piston
. On removing the device from the
surface being tested, the piston once more emerges completely from the device
which is immediately ready for a second test.
2.
If it is difficult to see the reading under the conditions specified in the previous
paragraph,
press the side button only after impact
hold the button in
and
remove the device in order to read the scale.
3.
If the button is used, as in the above case, the piston remains inside the device
when it is removed from the surface being tested. In such cases, in order to
prepare the test hammer for further tests, activate in by the method indicated in
Paragraph 1. The position of the device when the piston has withdrawn inside is
also the position used for packing away the device in its case.
