CALIBRATION OF THE MECHANICAL LITRE COUNTER (AF3000)
Calibration is necessary when the litre counter is new, after dismounting, when a different
fluid is measured or as consequence of significant wear. Calibration of the litre counter can be
changed easily by following the calibration procedure listed below. For the calibration proce-
dure it is necessary a test container or a container of KNOWN volume. It is recommended that
the container has a volume of at least 19 litres (5 gallons).
calibration procedure
1. Follow Figures
1-3
(as for clearing of the filter, page 41) to access to the calibration screw;
2. Fill the container up to a known volume;
3. if the indicated quantity does not correspond to the known volume, the litre counter must
be calibrated. Make sure that the pump is closed and that the pressure is interrupted, hence
remove the sealing screws and rotate the calibration screw (Fig. A) in the anticlockwise
direction to reduce the indicated quantity, or in the clockwise direction to increase this
quantity. A full rotation changes the indicated quantity by about 0.4 of a litre. Reinstall the
sealing screw;
4. repeat point 2 until the calibration is acceptable.
2. identify the filter to be cleaned in the lower part on the right of the pump and unscrew the
plug;
3. extract the filter, clean it and screw back its plug;
4. replace in the original position the front metal sheet and screw back all seven screws.
42
AF 3000 - AF 3000 TAG
