Page 4 Protimeter Grainmaster
2.1 Adjusting the Pre-Programmed Calibrations
If 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.
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