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Use, maintenance and calibration
M0171G
8.2.3 DIRECT MODIFICATION OF K FACTOR
If normal Meter operation shows a mean percentage error, this can be corrected by applying to the cur-
rently 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).
ACTION DISPLAY
1
NONE
METER in Standby.
2
CALCAL
CAL
LONG CAL KEY KEYING
Meter enters calibration mode, shows “CAL” and displays the calibration factor
being used instead of the partial. The words “Fact” and “User” indicate which of the
two factors (factory or user) is currently being used.
3
RESET
RESET
RESET
LONG RESET KEY KEYING
The Meter shows “CAL” and the zero partial total.
Meter is ready to perform in-field calibration by dispensing – see previous
paragraph.
4
RESET
RESET
RESET
LONG RESET KEY KEYING
We now go on to Direct change of the calibration factor: the word “Direct” appears
together with the Currently Used calibration factor. In the boom le part of the
display, an arrow appears (upwards or downwards) defining the direction (increase
or decrease) of change of the displayed value when subsequent operations 5 or 6
are performed.
5
RESET
SHORT RESET KEY KEYING
Changes the direction of the arrow. The operation can be repeated to alternate
the direction of the arrow.
6
CALCAL
CAL
CAL
SHORT/LONG CAL KEY KEYING
The indicated value changes in the direction indicated by the arrow
- one unit for every short CAL key keying
- continually if the CAL key is kept pressed. The speed increase rises by keeping
the key pressed. If the desired value is exceeded, repeat the operations from point
(5).
7
RESET
RESET
RESET
LONG RESET KEY KEYING
The Meter is informed that the calibration procedure is finished.
Before performing this operation, make sure the INDICATED value is that required.
8
NO OPERATION
At the end of the calculation, the new USER K FACTOR is shown for a few seconds,
aer 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 aer a baery
change
9
NO OPERATION
The Meter stores the new work calibration factor and is ready to begin dispensing,
using the USER K FACTOR that has just been changed.
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