Issue Date: August 23, 1999
Revision Date: July 23, 2015
TLS-300, 350, 350R, 350Plus, 8600 Series (Consoles TLS-
450 and TLS-450PLUS), TLS2, Red Jacket ProMax and ProPlus
(Models 8463, 8473, 8493 Magnetostrictive Probes)
AUTOMATIC TANK GAUGING METHOD
||Leak rate of 0.2
gph with PD = 95.6% and PFA = 0.3%.
A tank system should not be declared tight if the test result indicates a
loss or gain that equals or exceeds this threshold.
aviation fuel, biodiesel blends B6-B20 meeting ASTM D7467, biodiesel B100
meeting ASTM D6751.
||Maximum of 30,000
Tanks less than 95% full may be tested.
Minimum product level required is based on tank diameter as follows:
48" dia/min 18";
64" dia/min 21";
72" dia/min 24";
96" dia/min 30";
126" dia/min 39";
132" dia/min 39".
For other tank diameters, see evaluation report.
||Minimum of 8
hours between delivery and testing.
Minimum of 30 minutes between dispensing and testing.
There must be no delivery during waiting time.
||Minimum of 2
Test data are acquired and recorded by system's computer.
Leak rate is calculated from the difference between the first and last data
There must be no dispensing or delivery during test.
product is determined by probe which contains 5 thermistors.
At least two thermistors must be submerged in product during test.
Must be used to
detect water ingress.
Minimum detectable water level in the tank is 0.66 inch for model 8463 and
water level in the tank is 0.75 inch for model 8473 probe.
Minimum detectable water level in the tank is 0.38 inch when using TLS 350
with model 8463 probe with 88610x-0x0 water float and software version 30B
or higher, or 8600 series with software version 3A or higher.
Minimum detectable change in water level is 0.005 inch.
change in water level in tank is 0.01 inch when using TLS 350 with model
8463 probe with 88610x-0x0 water float and software version 30B or higher,
or 8600 series with software version 3A or higher.
probe must be checked and, if necessary, calibrated in accordance with
using manifolded tank systems. Therefore, this certification is only
applicable when there is a probe used in each tank and the siphon is broken
Tests only portion of tank containing product.
As product level is lowered,
leak rate in a leaking tank decreases (due to lower head pressure).
Consistent testing at low levels could allow a leak to remain undetected.
EPA leak detection regulations require testing of the portion of the tank
which routinely contains product.
Evaluator: Ken Wilcox Associates
Powder Forest Dr.
Simsbury, CT 06070-2003
Evaluations: 08/14/98 (Rev. 04/17/02),
08/31/10 (water sensor),
|02/29/08 (TLS-450 console comparison),
|10/06/14 (TLS-450PLUS console comparison)