Franklin Fueling Systems T5 Series Fuel Management System Operators Guide - Manual (Page 19)

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Statistical Continuous Automatic Leak Detection (SCALD)
SCALD (Statistical Continuous Automatic Leak Detection) runs 24hrs a day performing 0.2 GPH tests on tanks at sites
that do not have enough quiet time to complete static tests (some static tests may take up to eight hours to complete).
SCALD Testing is available only if the option for Tank Testing is enabled. This option can be ordered when initially
purchasing the console or afterwards. The part number for this option is TS-TT for TS-550/5000 systems or TS-SCALD for
TS-5/608 systems (TS-5/608 systems have Static Testing standard, but require the TS-SCALD option to perform SCALD
testing). The TS-TT option includes both Static and SCALD testing.
Why Continuously Test the Integrity of the 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 Integrity Tests determine whether there is a leak.
Since SCALD continuously runs statistical tank leak tests during the inactive periods between product deliveries and
dispensing, it is particularly useful for:
Operations that are open for business on a continuous (24 hours, 7 days a week) schedule •
Operations that are open for business on a two-shift schedule and where deliveries may occur at any time during non- •
business hours (normally schedule tank leak tests may require up to 8 hours of inactivity).
Terms
Qualify – The percentage of product that the tank is required to contain prior to testing according
to the programmed “Qualify” parameter.
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.
SCALD Testing Requirements
INCON SCALD testing is not yet listed with NWGLDE for T5 series FMS consoles. To perform SCALD testing, the SCALD
software must be enabled. To verify that the software is enabled:
Starting at the Home/Status screen, press the System Application button. 1.
Press the Application Menu button. 2.
Under Option, Tank Testing will appear. A “yes” in the Enabled column indicates that the software has been purchased 3.
and is enabled.
Step 1 Step 2 Step 3
When SCALD Tests
SCALD works by collecting quiet intervals in-between dispensing. A “QI” is obtained when a thermally stable tank is idle
for 20 minutes with no dispensing, no deliveries and no other movement of the probe floats. Once four QIs are collected,
the console will analyze the data and either Pass, Fail, Incomplete, or Abort that test. The four QIs can be collected over a
period of several days or weeks.