Fuel
Dispensers
TATSUNO
EUROPE
‐
Installation
and
User
Manual
,
revision
10,
January
2022
135
Now
the
dispenser
is
ready
for
fuel
delivery.
5.2.1.
CNG
DISPENSER
COMMISSIONING
Setting
of
mass
flow
meter
zero
‐
point
All
CNG
mass
flow
meters
based
on
the
principle
of
the
Coriolis
effect
are
sensitive
to
the
setting
of
zero
(zero
flow
rate)
because
with
a
decreasing
flow
rate
the
measuring
error
increases.
The
setting
of
zero
must
be
carried
out
after
every
dispenser
installation
and
every
meter
exchange.
The
dispenser
counter
allows
carrying
out
the
procedure
of
setting
the
zero
‐
point
using
the
service
remote
controller.
The
following
procedure
is
intended
for
authorized
service
engineers
or
metrology
officials
only:
Close
input
ball
valves
at
the
dispenser
inlet
and
hang
the
filling
nozzles
onto
the
dispenser
(filling
nozzles
must
be
in
the
nozzle
boot
during
the
zero
‐
point
setting
process)
The
calibration
switch
SW1
‐
1
must
be
in
the
OFF
position.
Set
the
parameter
P97
to
value
1
to
activate
the
procedure
for
setting
the
zero
‐
point.
The
counter
sends
a
command
for
setting
the
zero
‐
point
to
the
mass
meter.
Subsequently,
the
counter
waits
for
a
response
from
the
mass
meter.
It
then
ones
send
information
that
the
zero
‐
point
was
set
with
the
message
“done”
or
was
not
set
with
the
message
“fail”.
Don’t
exit
setup
until
the
zero
‐
point
setting
procedure
reports
“done”!
NOTICE
‐
CNG
If
the
zero
‐
point
value
is
not
correct,
or
the
process
of
zero
‐
point
not
passed
correctly
then
new
filling
is
not
allowed
and
error
message
E74
is
appeared).
NOTICE
‐
CNG
The
amount
display
(€)
shows
the
current
value
of
the
zero
‐
point.
The
quantity
display
(kg)
shows
the
course
of
the
zero
‐
point
setting
procedure.
NOTICE
‐
CNG
In
the
CNGmass
(Endress&Hauser)
meter,
the
course
of
the
procedure
is
signaled
by
an
increasing
number
1
‐
99.
After
reaching
the
value
99,
the
process
is
terminated,
and
the
message
"done"
is
shown.
Exit
service
mode
by
pressing
<R>
on
yellow
service
remote
transmitter
change
position
of
switch
SW
1
‐
1
to
ON
(PROTECTED)
Open
ball
valves
valves
at
the
dispenser
inlet.
NOTE
The
above
‐
mentioned
start
of
the
electronic
counter
is
described
for
the
PDEX5
counter.
The
course
is
very
similar
for
PDEX,
TBELX
and
TBELTM
counters.
The
version
and
checksum
of
the
metrologically
relevant
part
of
the
program
and
the
status
of
switch
SW1,
which
is
covered
by
a
cover
and
provided
with
a
seal
against
misuse,
are
always
displayed.
