OVERPRESSURE LEAK DETECTOR
DLR-2
18/01/2002 Ihr Partner für Leckanzeigetechnik
Sicherungsgerätebau GmbH, Siegen
- 9 -
7.3. Use for intended purpose
•
Underground double-wall pipework.
•
Feed pressure in the inner tank must be at least 1 bar lower than the minimum alarm pres-
sure.
•
Pipework must be grounded according to valid regulations
•
Leak detector system must be airtight according to the specifications in chapter 7.4.4.
•
Leak detector must be assembled outside the potentially explosive area.
•
Ducts for the connecting pipe(s) must be sealed airtight.
•
Leak detector (electric) must not be connected so that it can switch off.
7.4. Functional
test
Test of the functional and operating safety must be carried out after
•
every start up
•
stipulations of chapter 7.2 in the time intervals given there
•
every case of trouble-shooting
7.4.1 Extent of the test
(1) If necessary, discuss the tasks to be carried out with the person responsible on-spot.
(2) Heed the safety instructions regarding contact with the stored goods present.
(3) Check the through connections of the interstitial space (chapter 7.4.2)
(4) Test the switching values (chapter 7.4.3)
(5) Check air-tightness (chapter 7.4.4)
(6) Create operating conditions (chapter 7.4.5)
(7) A qualified person must fill out a test report confirming function and operational safety.
7.4.2 Checking the through of the interstitial space
If several interstitial spaces are connected, each individual interstitial space (strand) must be
checked for through connections.
(1) Close both shut-off cocks. Insert test pressure gauge in coupling 51, connect testing device
to coupling 6.2 (cf. P-115 520 no. I). The measuring gauge now indicates the current pres-
sure in the interstitial space.
(2) Open the test valve of the first pipework connected.
(3) Determine drop in pressure on the measuring gauge.
(4) Close the test valve.
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For Germany: e.g. EN 1127
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For Germany: regional-specific legal regulations must also be taken into account (e.g. VAwS)
