Veeder-Root TLS-450PLUS, Operator'S Manual

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Initial Setup Of The Console Using Workflow Wizard Setup>Tank>Limits - Concluded
29
Setup>Tank>Limits - Concluded
Water Alarm Filter Level
During the delivery process, turbulence m ay be generated in the tanks that
m ay cause the water float to rise above the water alar m thresholds and trig-
ger false water alar m s. In addition, a delivery of fuel containing water and/
or surface water flooding the area and entering the tank through a riser or
other opening
m ay result in significant quantities of water entering the
underground tanks.The Water Alar m Filter Level feature increases the sys-
te m ’s ability to respond to all of these situations. This field provides three
choices of filtering:
Low - This is the quickest response to either flooding or water delivery sce-
narios and is the default choice. The water alar m will be reported 3 m inutes
after the water level has crossed the progra mm ed threshold. A delivery m ay
be in progress during this alar m .
Medium - This level disables the water/alar m m onitor during a delivery.
The delivery detection threshold will be set to 25 GPM. This will be s m all
enough to detect m ost deliveries and large enough to not m istakenly identify
a delivery when water is leaking into a tank during a flooding situation. This
filter will only be applied to the water alar
m .
High - The level follows the sa m e behavior as the m ediu m level filter. The
delivery activity detection rate is raised to 6 GPM; (roughly equivalent to the
current delivery detection rate). The
m axi m u m Wait Ti m e will be increased
to 45 Minutes and the Maxi m u m Height Value will be increased to 10 inches.
NOTE: Adjust m ents to the delivery fill tube m ay eli m inate false water alar m s
caused by delivery turbulence.
See Actions>Help>Understanding ATG>Water Alar
m Filter Level for m ore
on this subject.
Leak Alarm Limit
[Applies to SLD tests only]
During a leak test, the leak alar
m li m it alerts you when the cu m ulative te m -
perature co m pensated (TC) product loss fro m a tank reaches the leak alar m
li m it value and helps identify large losses of product during a leak test.
To prevent false reports and alar m s fro m being triggered, do not set the li m it
value to identify losses of 0.2 gph (0.76 lph) or less during the test period.
The leak alar
m li m it should be set to identify losses of 1 gph (4 lph) or
greater.
Consider both the leak rate you wish to identify, and the length of the test,
when deter
m ining a value for leak alar m li m it. For exa m ple, a value of 8 gal-
lons (32 liters) will warn of:
• A 1 gph (4 lph) leak in 8 hours
• A 2 gph (8 lph) leak in 4 hours
NOTE:
The console auto m atically interprets the li m it you enter as a negative.
It is not necessary to enter the m inus (-) sign.
Sudden Loss Limit
[Applies to SLD and Ti m ed Sudden Loss Detection (TSLD) tests only]
This value allows the syste m to look for significant losses during a quiet
period to deter m ine if the tank is leaking or fuel has left the tank (e.g., by
bypassing the dispenser m eters). It is not based on TC Volu m e and is
intended to identify losses larger than the leak alar m li m it. The default is 99
gallons (374.7 liters) but can be set to 1 to 999,999 gallons (3.78 to 3781.63
liters). Typically, you should set this li
m it to 25 gallons (100 liters) or higher.
If you are getting too m any false alar m s, consider increasing this li m it.
Note: Siphoned- m anifolded tanks are m onitored as a single tank. The Sud-
den Loss Li m it threshold is the su m of the thresholds for each m e m ber of the
m anifolded set.
Density Low Limit
[Field only available if density probe is installed]
Triggers density warning (when greater than the value you enter here plus
1.00kg/
m 3 (0.062 lbs/ft3) and a density alar m .
Density High Limit
[Field only available if density probe is installed]
Triggers density warning (when greater than the value you enter here
m inus
1.00kg/ m 3 (0.062 lbs/ft3) and a density alar m .
Fuel Low Temperature Limit
The li m it that triggers a low fuel te m perature alar m . The default is -50
degrees Celsius (-58 degrees Fahrenheit). The alar m clears when the fuel in
the tank returns to a te m perature that is two degrees Celsius (3.6 degrees
Fahrenheit) higher than this te m perature.
Fuel High Temperature Limit
The li m it that triggers a high fuel te m perature alar m . The default is 60
degrees Celsius (140 degrees Fahrenheit). The alar m clears when the fuel in
the tank returns to a te m perature that is two degrees Celsius (3.6 degrees
Fahrenheit) lower than this te m perature.