Page 4
Protimeter Grainmaster
2.1 Adjusting the Pre-Programmed Calibrations
I
f required, each of the 15 pre-programmed crop calibrations (i.e. all except the 0-100
scale) can be adjusted individually by ±1.5% to allow for subtle changes that can be caused
by crop variety, growing conditions or geographical region. Pragmatic users may choose to
adjust their meter to match the results obtained from a local instrument used commercially.
Note:
Whenever a user adjustment is active, the
!
symbol flashes in the bottom right corner
of the display.
To adjust calibrations, complete the following steps:
1.
Select required crop and measure the moisture content of a sample as outlined in
section 2.0.
2.
While holding the
button to display the
%H
2
O
value, press
to increase the
calibration or
to decrease the calibration in increments of 0.1. An
!
flashes in the
bottom right corner of the display to indicate that a calibration has been adjusted by the
user.
3.
Remove a calibration adjustment by pressing
while pressing
. The
!
will
disappear from the bottom right corner of the display.
Note:
The adjustments are separate for each crop and are stored in the instrument’s non –
volatile memory until cleared in step 3
above or in
Section 4 (Setup Mode)
. No
adjustment is provided for temperature readings.
3 Optional External Moisture and Temperature Probes
A range of external moisture and temperature probes are available for use with the
Grainmaster i
. The external probes connect to the instrument via the edge connector
socket on the left-hand side of the instrument, this is protected by a blanking grommet
when not in use.