Alemite 8424 Servicehandleiding - Pagina 6
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8. LONG RESET KEY KEYING - 8424
is informed that the calibration
procedure is finished. Before doing this, make sure the
DISPLAYED factor is the ACTUAL factor.
calculates the new USER K FACTOR.
This calculation could require a few seconds,
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 ignored.
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. ATTENTION: 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 - 8424 stores the
new calibration factor and is ready for
dispensing, applying the newly defined
USER K FACTOR.
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 8424 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 K Factor = Old K Factor *
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).
Revision (1-11)
Operation
8424
(
)
1 0 0 - E%
100
6
1. NONE - 8424 in STAND BY: not in
counting mode.
2. LONG CAL KEY KEYING - 8424
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. LONG RESET KEY KEYING - 8424
shows "CAL" and the partial at zero.
8424 is ready to perform on-site
calibration by dispensing.
4. 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 bottom left 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. SHORT RESET KEY KEYING - Arrow
direction changes. The operation can be
repeated to alternate the direction of the
arrow.
6. 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. LONG RESET KEY KEYING - 8424 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, after which the
restart cycle is repeated to finally achieve standby
condition. ATTENTION: 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.
Flow Meter
Alemite, LLC