Fuel
Dispensers
TATSUNO
EUROPE
‐
Installation
and
User
Manual
,
revision
10,
January
2022
157
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).
22.42
19.95
€
L
€/L
1.124
22.48
20.00
€
L
€/L
1.124
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