Issue Date: July 14, 2003
Dresser Wayne Europe
TIG 5000 0.2
gph Precision Test and Quick Test
(Q0400-4xx Magnetostrictive Probe)
AUTOMATIC TANK GAUGING METHOD
||Leak rate of 0.2
gph with PD = 99.1% and PFA = 0.9% for Precision Test.
Leak rate of 0.2
gph with PD = 95.4% and PFA = 4.6% for Quick Test.
system should not be declared tight if the test result indicates a loss or
gain that equals or exceeds this threshold.
aviation fuel, fuel oil #4.
||Maximum of 15,000
gallons. Tanks less than 95% full may be tested. Minimum product level
required based on tank diameter as follows:
48" dia/min 8.5";
64" dia/min 10.5";
72" dia/min 11.5";
96" dia/min 14";
126" dia/min 18".
For other tank diameters, see evaluation report.
and testing ranges from 1 to 6 hours depending on tank conditions.
None between dispensing and testing.
There must be no delivery during waiting time.
||Average of 2
hours, 46 minutes during Precision Test evaluation.
Average of 1 hour, 9 minutes during Quick Test evaluation.
Test data are acquired and recorded by a microprocessor which
automatically determines test time based on tank size and product
There must be no dispensing or delivery during test.
||Probe contains 5
resistance temperature detectors (RTDs) to monitor average product
At least one RTD must be submerged in product during test.
||Must be used to
detect water ingress.
Minimum detectable water level in the tank is 0.66 inches.
Minimum detectable change in water level is 0.039 inches.
||RTDs and 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 the 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
EPA leak detection regulations require testing of the portion of the tank
which routinely contains product.
Dresser Wayne AB
Limhamnsvagen 109, Box 30049
SE-200 61 Malmo, Sweden
Dates of Evaluation:
08/17/95, 07/28/97, 11/17/99