TATSUNO EUROPE a.s., www.tatsuno‐europe.com
20
3.3.1.
CNG DELIVERY TO MOTOR VEHICLES
Delivery start
Before the delivery starts, the dispenser attendant checks whether the storage tank in a vehicle has a
homologation mark, the vehicle engine and all electrical devices are turned off. Then he/she visually inspects
the condition or wear of the filling neck/connector that could be the reason for leaks. If he/she finds serious
deficiencies, he/she is entitled to refuse storage tank filling. In case of gas leak or danger the attendant shall
finish the delivery.
The operation of the dispenser itself is ensured by the
employee of the fuel station who lifts the delivery nozzle from
the dispenser and connects it to the storage tank of the vehicle
which must be secured against moving. Immediately after the
nozzle is lifted the display test is performed – displaying all
segments – and then it is reset and the product unit price is
displayed.
After pressing the START button located on the counter case the electromagnetic valve opens at the inlet of the
first pressure section and the pressure storage tank of the
vehicle is filled with compressed natural gas. At the moment
when the delivery speed decreases under the defined limit, the
electronic counter automatically switches delivery to the
second section and then potentially to the third pressure
section – depending on the dispenser and fuel station
configuration.
NOTE
Some dispensers, especially non‐public ‐ company dispensers, are not fitted with the sensors of
delivery nozzle lifting. At such dispensers the display test is performed after pressing the START button.
Delivery termination
The delivery may be terminated for various causes. Possible causes of delivery termination and corresponding
messages shown on the display are mentioned in Table 14.
Table 14 ‐ Causes for delivery termination
Event
Indication on
display
1. Pressing the STOP button by the customer/attendant during the delivery
STOP
2. Attaining the pre‐set sum, quantity or limit values of the dispenser
STOP
3. STOP command received from the superior system (payment terminal)
STOP
4. Gas flow rate drop under the value set on the dispenser (e.g. < 2kg/min)
FULL
5. Attaining the maximum possible mass calculated by temperature compensation
FULL
6. Detection of an error event.
Exx
8888888
188888
€
Kg
€/kg
88888
0
.
0
0
.
000
€
Kg
€/kg
26
.
50
