M0158B IT | en
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Installation, use and maintenance
8
LONG RESET KEY KEYING
K900 is informed that the calibration procedure is finished. Before doing this, make
sure the DISPLAYED factor is the ACTUAL factor
Indicated value Real value
K900 calculates the new USER K FACTOR ; this calculation could require a few sec-
onds, depending on the correction to be made.
During this operation the arrow disappears but the CAL indication remains.
If this operation is performed after operation (5), without changing the indicated value,
the USER K FACTOR would be the same as the FACTORY K FACTOR, thus it is ig-
nored.
9
NO OPERATION
At the end of the calculation, the new USER K FACTOR is shown for a few seconds,
after which the restart cycle is repeated to finally achieve standby condition.
IMPORTANT: From now on, the indicated factor will become the calibration factor used
by the meter and will continue to remain such even after a battery change
10 NO OPERATION
K900 stores the new calibration factor and is ready
for dispensing, applying the newly defined USER K FACTOR.
I2.3 DIRECT MODIFICATION OF K FACTOR
This procedure is especially useful to correct a “mean error” obtainable on the basis of several performed
dispensing operations. If normal K900 operation shows a mean percentage error, this can be corrected
by applying to the currently used calibration factor a correction of the same percentage. In this case, the
percentage correction of the USER K FACTOR must be calculated by the operator in the following way:
New cal. factor = Old cal. factor
*
(
100 - E%
100
)
Example
Error percentage found E%
- 0.9 %
CURRENT calibration factor
1,000
New USER K FACTOR
1,000 * [(100 – ( - 0,9))/100]=
1,000 * [(100 + 0,9)/100] =
1.009
If the meter indicates less than the real dispensed value (negative error) the new calibration factor must be
higher than the old one as shown in the example. The opposite applies if the meter shows more than the
real dispensed value (positive error).
Summary of Contents for K900
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