11-3
11
CSLD Troubleshooting
CSLD Block Diagrams
Figure 11-2.
CSLD Leak Test Timing Sequence
PRE-DELAY
TEST
PRE-START
TEST
COMPLETE
END DELAY
Tank idle
8 minutes?
No
Yes
SCHEDULE TEST
Tank goes idle and must remain so
for 8 minutes. Idle is determined by:
1) analysis of a group of probe samples
from the 30 second average table, and
2) checking the pump sense module
(if available).
one sample delay
(30 seconds)
5 m Accept time
(dynamic variable of
0 - 45 minutes duration)
Minimum test time
15 m Feedback time
(dynamic variable of
0 - 45 minutes duration)
All probe samples received
within
this test period are used in the
leak analysis
Several sample delay to clear
current test data from test
sequence and prepare for next test
TEST IN
PROGRESS
(Tank going active will
abort test if insufficient
data has been
collected)
Record test results in database if:
1) test was of sufficient duration
2) leak rate < +0.4 gph
3) CSLD Volume Table must be
complete
CSLD test requires
a minimum time of
28 minutes. A maximum
test time of 3 hours
is imposed.
Test Event Timing
Test Events
source\csldtm.visio
Start
Finish
