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Fuel Dispensers TATSUNO EUROPE ‐ Installation and User Manual , revision 10, January 2022
6.1.3. METER CALIBRATION
In TATSUNO EUROPE dispensers equipped with TATSUNO flow meters, two types of meter calibration can
be carried out:
(1) Mechanical calibration of the meter
(2) Manual electronic calibration of the meter
(3) Automatic electronic calibration (PDEX5 counter only)
CAUTION
Meter calibration can only be performed by a person assigned to do so, i.e., a designated service
technician or metrologist. When calibrating the meter, the metrology marks and seals are broken.
The meter mechanical calibration (1) is performed only on piston meters of the type FM‐1007, FM‐1025,
MP02524 (LPG), FM‐1029 (LPG), FM‐1022 (AdBlue + WSE) directly on the meter by turning the calibration
wheel (see Figure 90) by which we can mechanically adjust the cyclic volume of the meter. If the meter is
adjusted precisely, one revolution of the meter shaft corresponds precisely to 0.5 L of dispensed fuel and
50 pulses which are sent in the calculator by the pulse generator (pulser) connected to the meter shaft.
By turning the calibration wheel either clockwise or counter clockwise, it is possible to correct meter
accuracy within the range of ±1.3 % in steps corresponding to a change of 0.04 %.
NOTE
The calibration wheel for fuels (FM‐1007) and AdBlue (FM‐1022) can be turned through 17 holes in
both directions. The difference of precision between two adjacent holes is ±0.08 %. The wheel can be fixed
also in a position between holes, i.e., the difference of precision is ±0.04%. The calibration wheel for LPG (FM‐
1029 and MP‐02524) is positioned under a cover and can be turned through 17 holes in both directions. Only
the position in a hole can be fixed. The difference of precision between two holes is ±0.08 %.
NOTICE
The FM‐1025 petrol piston meters (MVP‐X hydraulics) can only be calibrated electronically.
The meter mechanical calibration procedure is as follows:
1) Precise dispensing into a calibration vessel (with capacity of e.g., 20 L, 50 L,
100 L) is carried out.
2) Depending on the display and the calibration tables, the calibration wheel
of the meter is rotated clockwise (volume down) or counter clockwise
(volume up) by the appropriate number of holes, for example, when taking
up to a 20L calibration tank, the display shows 19,95L which is according to
the table, see Table 38 below, out of the tolerance by ‐0.25 %. It is necessary
to turn the calibration wheel through 3 holes clockwise, i.e., to reduce the
meter chamber capacity to increase the number of shaft revolutions and
thus also pulses.
3) The calibration wheel is fixed with a pin and a new checking metering is to be carried out.
4) After meter adjustment completing, the calibration wheel is fixed, and the meter provided with
seals (see Figure 90, position B, C, D, E).
157
€
22.42
L
19.95
€/L
1.124
€
22.48
L
20.00
€/L
1.124
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