OVERPRESSURE LEAK DETECTOR
DLR-2
18/01/2002 Ihr Partner für Leckanzeigetechnik
Sicherungsgerätebau GmbH, Siegen
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(1) Insert the test pressure gauge in test coupling 51, connect the testing device to coupling
6.2 (cf. P-115 520 no. I).
(2) The current pressure is indicated on the test pressure gauge.
(3) Any deviations in pressure must be assessed as follows:
(4) Determine the difference between nominal pressure and the value "alarm ON" and convert
to mbar (x 1000).
(5) Divide the resulting value of item (4) by 365. The result of this calculation is the maximum
value tolerated (per 24 h) in order not to have the alarm triggered within a period of one
year.
(6) Further division by 24 indicates the permissible drop in pressure per hour.
(7) If the pressure value calculated in item (6) can no longer be measured with the measuring
gauge, this value can be multiplied by 3, for example, which is then the specification for the
air-tightness test in mbar per 3 hours. If necessary, much longer test times must be used.
(8) The above-mentioned values should be reached in order to guarantee one year of trouble-
free operation.
(9) Once the air-tightness test has been completed, remove the testing device from the con-
nection, remove the test pressure gauge from the testing device.
7.4.5 Establishing the operating condition
(1) Seal the housing, "acoustic alarm" switch and test valve(s) at the end of the pipework away
from the leak detector.
(2) If there are shut-off cocks being used in the connecting pipes these must be sealed open
(provided they are connected to interstitial space).
7.5. Alarm
(1) In case of alarm the red signal lamp 1 lights up and the acoustic signal 69 sounds.
(2) Remove the lead on the "acoustic alarm" switch, turn off the acoustic alarm and inform a
qualified company immediately.
(3) The expert from the qualified company or the operator must establish why the alarm was
triggered, eliminate the problem and then check that the leak detection system is function-
ing correctly as described in section 7.4.
8. Dismantling
Special attention must be paid to the following points when dismantling equipment which could
be potentially explosive:
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In this chapter it is assumed that the nominal pressure is built up in the interstitial space and pressure
compensation has taken place.
