Pavone Systems DAT 1400 Technical Manual page 33

CALIBRATION OF SAMPLE WEIGHTS
The calibration procedure described below should be carried out using sample weights and/or a sample
product pre-weighed on a weighing system.
Before proceeding with calibration of the full scale, always perform zero calibration.
During the calibration phase, the weight is shown on the display in alternation with the text CAL.
WARNING: Switching off the instrument without exiting the set-up menu cancels any changes made
during the programming process.
N.B. If linearity errors are shown after calibration, verify that theweighed structure is completely free
of mechanical constraints.
ZERO CALIBRATION
Perform this operation with the scale unloaded (including the fixedtare), and when the weight is stable.
The zero value of the system is set by pressing the key 0.
The weight displayed is reset and the display shows CAL and 0. in alternation. This operation can be
repeated at will.
CALIBRATION OF THE FULL SCALE
Before calibration, put the sample weight on the scale and wait for stabilisation; the display shows a
weight value.
To correct the displayed weight press the SET key. All the digits to 0 appears on the display with the the
first digit on the left flashing. Using the arrow keys, enter the actual weight loaded on the scale starting
with the first flashing digit. Move to the next digit by pressing PRG. Pressing the PRG key to confirm
the last digit (far right) corrects the weight. SAVE and then CAL are shown in alternation to the actual
weight value entered on the display.
If the set value is higher than the resolution offered by the instrument,the weight is not accepted and an
error message appears on the display for a few seconds.
This procedure can be repeated.
Press and hold the PRG key to return to the CaL1br. . . menu.
LINEARISATION PROCEDURE
Sample weights linearisation: (SET key long press) Up to 5 linearisation points are possible on positive
scale. The progression of linearisation points is displayed alternately to the current weight. Press the SET
key to set the sample weight value loaded and stabilised. On confirmation you go to the next point. If
0 is set the value is not saved. To end the procedure press and hold the PRG key. It is possible to save
a number of points less than 5.
The calibration operations can always be repeated.
When programming the sample weight, values greater than the full scale, or lower than the previous
point, or when the weight is not stable, are not accepted. If the entered value is accepted, the next step
is shown, otherwise still the same.
The linearisation points are automatically reset by any change of the theoretical calibration data or if
a full-scale calibration is performed.
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