Franklin Fueling Systems TS 550 evo Fuel Management System Operators Guide - Manual (Page 19)

15
Tank Testing
There are two types of Tank Testing available in the Fuel
Management Systems: Static and SCALD.
Static tests are run during quiet times when the tank is
thermally stable and the site is closed so that no dispensing
or deliveries will occur. There are two types of Static tests:
Monthly (0.2 gph) and Annual (0.1 gph). Static tests can
be scheduled to run on a Daily, Weekly or Monthly basis in
the Setup menu (Administrator use only). They can also be
started on demand from the tank detail screen. Make sure
that all testing conditions are met before starting a Static
Tank Test.
SCALD (Statistical Continuous Automatic Leak Detection)
tests run 24 hours a day and look for periods of quiet time
when the tank is thermally stable and no dispensing or
deliveries are occurring. These quiet periods are collected
and analyzed and the tightness of the tank is determined.
SCALD tests will update whenever possible and can
be setup to print automatically when they do. The more
common method is to schedule the latest SCALD test to
print out once a week, saving a significant amount of paper
because SCALD tests can be generated multiple times a
day on a quiet tank.
Static and SCALD tests run independently of each other
and can be run at the same time. A SCALD test will likely
complete during the time that the Static test is running.
All Franklin Fueling Systems Fuel Management Systems
meet the requirements of the U.S. Environmental
Protection Agency (EPA/530/UST-90/006 test protocol) for
Automatic Tank Gauging Systems (ATGS). The system(s)
also meet the requirements for Annual Tank Tightness
Testing for 0.1 gal/hr leaks of the National Work Group on
Leak Detection Evaluations (NWGLDE). Third Party Testing
Laboratory test results (for standard static tank leak tests)
are also available at http://nwglde.org/ .
Why Test the Integrity of a Tank
In compliance with federal, state and local regulatory
policies, all tanks must be monitored for leaks due to
environmental and public safety/health concerns. Tank
tightness testing determines if there is a leak.
Static Testing
Terms
Threshold – Test results must be within these
programmable limits to pass a leak test. There are Monthly,
Annual and Sentinel Mode Thresholds.
Sentinel Mode – Sentinel mode is designed to monitor the
product levels in your tank(s) when there isn’t supposed to
be any dispensing.
Confidence – Level of testing
sensitivity indicating the probability
that the test will detect a leak. Higher
confidence percentages will produce
more sensitive test results. Check
local regulations to verify acceptable
confidence levels.
Flow
Time No Leak
(+) slope
(–) slope
Slope (Tank Testing Reports) – A
ratio of the calculated rate of change
to the time the rate is measured.
Slope is affected by leaks and by
many other sources of interference.
A negative slope or decrease
indicates loss of product volume. A
positive slope or increase indicates a
rise in product volume.