PRESSURE LEAK DETECTOR
DLR-G ..
24/10/2018
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Operating mode "I":
Determine the difference between the measured values for "Re-
filling (Filling) OFF" and "Alarm ON" and convert into mbar (x
1000). Divide the calculated value by 8760. This results in a max-
imum tolerated pressure drop (per hour) to prevent triggering an
alarm before one year has passed.
If the determined value cannot be measured, multiplication of the
pressure drop will result in the same multiplication of the test
time.
Example:
Difference between the above-named switching values: 1.75 bar
(value measured on site)
1.75 x 1000 = 1750
1750 / 8760 = 0.2 mbar / h (permitted pressure drop)
The measuring gauge available on site "only" shows a value of 5
mbar. This means the readability is 25 times (5 / 0.2). This ex-
tends the test time to 25 hours.
(3) Disconnect the measuring gauge after the tightness test has
been completed.
7.3.5 Tightness test as part of the annual functional check
(1) Perform a tightness inquiry (see section 4.5.5).
(2) Evaluate the displayed value (visible on the display for 10 sec-
onds) according to section 12.1. This appendix serves informa-
tional purposes only and is not part of the permit.
7.3.6 Creating the operating condition
(1) Seal the housing and the test valve(s) at the end of the interstitial
space pointing away from the leak detector.
(2) If shut-off cocks have been installed in the connection lines, they
must be sealed in an opened position (if connected to an intersti-
tial space).
(3) Make sure that for operating mode "C", the pressure gas bottle is
filled sufficiently.
Functional Check and Maintenance
