Graco 127650, Instructions Manual

Page: 17 / 80

M0303 17
EN
9
NOTICE
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 finall
achieve standby condition.
From now on, the indicated factor will become the
calibration factor used by the NEXT and will continue to
remain such even after a battery change
10
NO OPERATION
The NEXT stores the new work calibration factor and is ready to
begin dispensing, using the USER K FACTOR that has just been
calculated..
K 4.3 DIRECT MODIFICATION OF K FACTOR
If normal NEXT 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 NEXT 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 NEXT shows
more than the real dispensed value (positive error).
ACTION DISPLAY
1 NONE
METER in Standby.
2
CAL CAL CAL
LONG CAL KEY KEYING
NEXT 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 NEXT shows “CAL” and the zero partial total.
NEXT is ready to perform in-field calib ation 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 bottom left part of the display, an arrow appears (upwards
or downwards) defining the di ection (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
CAL CAL 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 NEXT is informed that the calibration procedure is finishe .
Before performing this operation, make sure the INDICATED value
is that required.