SGB DLR-GS PMN Series, Документация

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Page 3 of 7
of the Approval Certificate
dated February 1, 2006
Order no. 0111 BM 21610
Mode M - The necessary operating overpressure in the interstitial space is
provided by connecting a mobile pressure accumulator before
starting up the leak detector.
The operating modes S and M should be selected via a micro selector switch located
in the unit before the leak detector is started up. The current interstitial space
pressure is indicated via a digital display which is integrated in the front panel. If the
operating overpressure in the interstitial space drops to the selected alarm switching
value then visual and acoustic alarms are automatically triggered.
Overpressure leak detector DLR-P..
With this variant of the device, the pressure in the interstitial space is generated by
means of an integrated pump, as a result of which only dried ambient air is used as
the leak detection medium. According to the technical description provided by the
manufacturer, the lowest monitoring pressure is 1.45 bar and the highest interstitial
space pressure is 3.4 bar. According to details provided by the manufacturer, special
switching values are also possible.
Overpressure leak detector DLR-GS..
With this variant of the device, the overpressure in the interstitial space can only be
generated by means of an externally connected pressure gas accumulator, whereby
compressed air or inert gas can be used as the leak detection medium. Two types of
the leak detector DLR-GS.. are manufactured. These two types differ in terms of the
maximum operating pressure of the interstitial space. The DLR-GS 11 is designed
for a maximum operating overpressure of 11 bar, while leak detector DLR- GS 22 is
designed for a maximum operating pressure of 22 bar in the interstitial space. The
alarm switching values are freely adjustable via an adjusting screw on the pressure
switch and should be set beforehand in accordance with the operating instructions.
All variants of the device are equipped with a test connection which allows an
external measuring device to be connected. Overpressure protection devices for
protection of the devices and the interstitial spaces against violations of upper
pressure limits are not a fixed part of the leak detector. Depending on the
requirements, they can be connected in the device or externally to the interstitial
space.
Details about the design of the leak detector DLR-.. can be found in the technical
description provided by Sicherungsgerätebau GmbH dated 26 February 2002, and
details about the design of the variant DLR-P.. can be found in the technical
description dated 21 December 2005.