Protimeter Grainmaster
Page 3
5.
Ensure that the grinder-compressor unit is clean and is operating smoothly. If not,
disassemble and clean as detailed in section 5.1.
6.
Prior to placing the grinder-compressor unit on the instrument, ensure that the plunger
is fully retracted within its housing. The plunger is retracted fully by sliding the switch
on the underside of the rotating handle forward into the compress position (picture)
and rotating handle anti-clockwise until the clutch clicks a few times. The sliding
switch can only be pushed or pulled into position when the black pips on the top of the
rotating handle are aligned with the yellow X.
7.
Pull the switch on the underside of the
rotating handle to the grind position and
place the grinder-compressor unit over
the grain cup. Lock the unit in place by
twisting it clockwise against the three
lugs.
8.
Always use the correct sample size of 10
ml. Using the 10 ml spoon provided, pour
a sample into the hopper on the side of
the grinder-compressor unit.
9.
Hold the
Grainmaster i
against a flat and horizontal surface and rotate the handle
clockwise to grind the sample and push it through into the grain cup. If necessary,
check to see the entire sample has passed through the grinder blade by turning the
handle anti-clockwise a quarter turn and looking into the hopper.
10.
Align the pips and the yellow X of the rotating handle and push the sliding switch
forward into the compress position. Turn the handle clockwise to screw the plunger
onto the ground sample that is now in the grain cup. Correct compression is reached
when the clutch clicks a few times.
11.
Press and hold
to display the moisture content of the sample. When the reading has
stabilized, release
to freeze the
%H
2
O
value for approximately 7 seconds. Note
and record this value as required.
12.
If necessary, display the temperature of the sample by pressing the
or
only
after
releasing
. Note and record this value as required.
13.
Having noted the moisture (and/or temperature) reading, turn the handle anti-
clockwise until the clutch clicks (to fully retract the plunger!). Remove the grain cup
and the tested sample and clean the grain cell with the brush prior to commencing
another test.