Watson-Marlow PF22 - Manual (Page 26)

Operators Manual
PF22
PF22 OM EN 74-132-005 v1.02.doc Version: 1.02 Page 26 of 34
7 Calibration
As the surroundings of the PF22 may vary from time to time and as tubes and products have small
tolerances, it is necessary to calibrate the filler when it is started.
If the quantity has been entered as volume in ml, a measuring cylinder or a balance may be used
as a control and measuring unit. The balance will always be the more accurate, especially for
small quantities.
The calibration in PF22 is made as following.
This re-calibration can be carried out simultaneously with the fills.
7.1 Volume calibration with measuring cylinder
IF A VOLUME HAS BEEN ENTERED IN FUNCTION 1, AND A COMPLETED
FILL IS MEASURED IN A MEASURING CYLINDER, THE SPECIFIC GRAVITY
IN FUNCTION 9 MUST ALWAYS BE SET AT THE VALUE 1.0.
(The parameters already entered may be used for a trial).
Prepare the measuring cylinder and make sure that the tubes are completely filled, up to and
including the filling needle.
(It is recommended to let the filler complete a few fills before the calibration is carried out).
Keep the measuring cylinder below the filling needle and press <calib>+<GO> to complete a
single fill and PF22 will now ask the dispensed volume showing the following display:
CALIB. WEIGHT: 0.0000_
F 1: VOLUME (ml): 8.50
In the prompt line, PF22 asks the weight. THE WEIGHT MUST BE ENTERED, for example 8.05:
<8>+<.>+<0>+<5>+<ENT>.
PF22 has now automatically adjusted from 8.05 ml to 8.5 ml.
Function 8 should now be reset, and the filling may be started by pressing <disp.>+<GO>.