WWC T1 Set Up & Maintenance Manual Product Information
Document Ref 905675-001 Rev 2 Page 2-9
If detected, the leak error is forwarded to the system and will immediately block
the complete dispenser. The calculator keeps track of the leak status.
Parameter:
- hose expansion volume : 5 cl for 40 l/min
10 cl for 80 l/min
40 cl for 130 l/min
- hose expansion time : 1 second
- leak volume : 2 to 8 cl
- leak time : 2 seconds
Refer to section 6.10.3 for programming information.
Fuel Leak Detection
At the start of each delivery, a leak test is started via a request from the kiosk.
Up to three attempts are made to verify the leak. If the leak is verified, the
results of the leak tests are forwarded to the kiosk via special messages.
Parameter:
- volume (v) : 0 to 45 cl default = 0
- time (t) : 0 to 20 second(s) default = 0
Refer to section 6.17 for programming information.
Axial Flow Meter (AFM) Leak Detection (kernel >= 3.02)
This function can identify a potential AFM spindle lock situation which could
result in a leakage of approximately 1.2 to 1.5 gallons per minute.
The assumption is made that “an AFM leak situation occurs when the ‘no flow’
timeout occurs n times in a sequence AND the total reported volume is 0”.
Normally, during a delivery, the “no flow” timer is restarted each time a volume
update is done. When the timer expires i.e. no flow during the “no flow” period
(default = 1 minute within a range of 0 to 9:59 minutes), the delivery will be
stopped and the motor and valves switched off without indicating an error.
To be able to detect an AFM spindle lock situation when the “no flow” timer
has expired, the corresponding volume is checked:-
•If volume > 0 : no change in the behaviour, reset the leak sequence counter of
the associated hose (product/side)
•If volume = 0 : increment the leak sequence counter of the associated hose
(product/side)
If the counter exceeds the predefined (not user adjustable) limit of three (3)
then an error will be logged and reported. The associated hose will be blocked
until a manual release action is performed. Lifting the nozzle of a blocked hose
will display the error again but it will not log another error.
Issue A
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