Figure 10-2. Csld Leak Test Timing Sequence - Veeder-Root TLS-4 Series Troubleshooting Manual

10
CSLD Troubleshooting
Test Events
SCHEDULE TEST
Tank idle
8 minutes?
Yes
PRE-DELAY
TEST
PRE-START
TEST IN
PROGRESS
(Tank going active will
abort test if insufficient
data has been
collected)
TEST
COMPLETE
END DELAY
No
Figure 10-2. CSLD Leak Test Timing Sequence
10-3
Test Event Timing
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 minutes + Accept time
(dynamic variable of
0 - 45 minutes duration)
Minimum test time
15 minutes + Feedback time
(dynamic variable of
0 - 45 minutes duration)
All probe samples received
within
this test period are used in the
leak analysis
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
Several sample delay to clear
current test data from test
sequence and prepare for next test
CSLD Block Diagrams
Start
CSLD test requires
a minimum time of
28 minutes. A maximum
test time of 3 hours
is imposed.
Finish
source\csldtm.visio