WEIGHING
14
4.4
Incorrect Weight readings
After performing the initial weight calibration and loading a few trucks, you
may find that the load readings from the instrument are consistently different
from weighbridge (weighscale) readings. This situation can also occur after
maintenance or repair to the loading shovel e.g. changing a bucket.
If the Weighlog reading is more than the true weight, the factor is decreased
and vice versa, if the Weighlog reading is less than the true weight, the factor
is increased.
Therefore, if you find a consistent discrepancy between the Weighlog
readings and the weighbridge readings, intuitively, you can then nudge the
cal factor up or down as required
E.g. If the Weighlog reading is 10% high, then reduce the cal. factor by 10%.
The actual calibration factor can also be determined by a simple calculation
using the true weight and the displayed weight as follows :
Correct factor = existing factor x true weight
Weighlog reading
The calibration factor can be adjusted either in Cal Mode 1 or from the
normal operating mode.
Adjusting a Weight reading in normal operating mode
With the instrument in the normal
operating mode, lift a known weight. If
the displayed weight differs, then you can
easily correct it (‘nudge’) as follows.
Press and hold the REF button for 5
seconds until the display is as shown.
Continue holding the REF button and
either adjust the weight up using the
ZERO key, or down using the PRINT
(outer right) key.
Release the REF key. The display shows
‘DonE’
and a new calibration factor is
stored in memory.
Figure 12b: Adjust Cal Factor
