7
5.3 Load a Test Specimen
Put a test specimen on the anvil and turn the handwheel (21) of the elevating screw
until the piece contacts the indenter. Continue turning the handwheel until the indenter
is lifted slightly and the handwheel slips.
If the handwheel does not reach a point where it slips, the ball detent (19) may need
adjustment. Using a flat head screwdriver unscrew the detent screw by a quarter turn
and turn the handwheel. If It does not slip repeat the procedure until it slips.
5.4 Selecting Time-at-load
Turn on the power switch (14) and the power supply light (4A) will turn on. Choose the
duration of loading according to the Face Plate Detail on page 8 then push the button
for duration loading (12, 30 or 60 seconds).
5.5 Initiating a Test
Push the start button (5A). A test cycle will be completed automatically by the tester.
5.6 Test Completion
When the test is over, lower the elevating screw and remove the specimen. Measure
the diameter of the impression with a scope and convert the measurement to a Brinell
value with a Brinell chart.
5.7 Brinell Scope Measurement
The magnification of a standard measurement scope is 20X. The minimum graduation
of the microscope is 0.1mm. A battery-powered light is usually attached.