sewerin rmld Manuale utente
Operating
Instructions
Measurable success by Sewerin equipment
Congratulations. You have chosen a quality instrument manufactured
by Hermann Sewerin GmbH.
Our equipment will provide you with the highest standards of perform-
ance, safety and efciency. They correspond with the national and in-
ternational guide-lines.
Please read and understand the following operating instructions before
using the equipment; they will help you to use the instrument quickly and
competently. If you have any queries we are available to offer advice
and assistance at any time.
Yours
Hermann Sewerin GmbH
Robert-Bosch-Straße 3
33334 Gütersloh, Germany
Tel.: +49 5241 934-0
Fax: +49 5241 934-444
www.sewerin.com
info@sewerin.com
Sewerin USA, LLC
2835 Haddoneld Road
Pennsauken, JJ 08110-1108
Phone: +1 215-852-8355
Fax: +1 856-662-7070
www.sewerin.net
sewerin-usa@sewerin.net
SEWERIN SARL
17, rue Ampère - BP 211
67727 Hoerdt Cedex, France
Tél. : +33 3 88 68 15 15
Fax : +33 3 88 68 11 77
www.sewerin.fr
sewerin@sewerin.fr
Sewerin Ltd
Hertfordshire
UK
Phone: +44 1462-634363
www.sewerin.co.uk
info@sewerin.co.uk
SEWERIN IBERIA S.L.
Centro de Negocios Eisenhower
Avenida Sur del Aeropuerto
de Barajas 24, Ed. 5 Of. 2C
28042 Madrid, España
Tel.: +34 91 74807-57
Fax: +34 91 74807-58
www.sewerin.es
info@sewerin.es
Sewerin Sp.z o.o.
ul. Annopol 3
03-236 Warszawa, Polska
Tel.: +48 22 519 01 50
Fax: +48 22 519 01 51
Tel. kom.+48 501 879 444
+48 608 01 37 39
www.sewerin.com
Operating Instructions
31.01.2007 – 105713 – en
RMLD
Remote Methane Leak Detector
Warranty & Warning notices
To ensure reliable operation and safety, it is required to pay attention to
the following notes.
Hermann Sewerin GmbH is not liable for damage caused by failure to
comply with these notes. The guarantee and liability conditions of the sales
and delivery conditions of Hermann Sewerin GmbH are not extended by
the following notes.
This product may only be taken into operation after reading thoroughly
the accompanying operating instructions.
This product may only be used for intended applications.
This product is destined for industrial and commercial applications.
Repairs may only be performed by the manufacturer or appropriately
trained staff.
The manufacturer is not liable for damage resulting from arbitrary modi-
cations of the product.
Only spare parts may be used which are approved by Hermann Sewerin
GmbH.
Technical changes within the scope of further development reserved.
Danger!
The visible green Spotter laser is a Class IIIa laser product.
Do not look into the beam or view directly using optical in-
struments.
CAUTION!
Do not attempt to repair this device. Please refer to Section
V in this manual if the device does not work correctly or in-
dicates a fault or warning.
Warning!
Do not switch on or use the RMLD indoors if there is any
indication, possibility or suspicion that an explosive level of
gas may be present.
I
Contents Page
Overview ..................................................................................1
Section I (System description)...............................................4
1.1 Technical data for the RMLD system ........................................4
1.2 RMLD system components .......................................................6
1.2.1 Controller................................................................................6
1.2.2 Transceiver.............................................................................6
1.2.3 Carrying strap.........................................................................7
1.2.4 Charger .................................................................................7
1.2.5 Carrying case .........................................................................7
1.2.6 Headphones...........................................................................7
1.3 Optional accessories.................................................................8
1.3.1 Dual shoulder strap harness ..................................................8
1.3.2 External power source ...........................................................8
Section II (Battery charging) ..................................................9
2.1 Rechargeable battery................................................................9
2.2 Charger ..................................................................................10
2.3 Charging procedure ................................................................10
Section III (Operating the RMLD) ......................................... 11
3.1 Switching on the RMLD...........................................................13
3.2 Switching on the spotter laser .................................................14
3.3 Switching off the RMLD...........................................................15
3.4 Using the menus .....................................................................15
3.5 Using DMD mode....................................................................17
3.6 Using the Pure Tone mode......................................................18
3.7 Self-test and calibration...........................................................19
3.7.1 Calibration override ..............................................................22
Section IV (Monitoring with the RMLD)...............................24
4.1 Monitoring with the RMLD.......................................................24
4.2 Long range scanning...............................................................27
4.3 Dealing with false detections...................................................28
4.4 How does the RMLD measure gas concentrations?...............29
II
Contents Page
Section V (Maintenance and troubleshooting)...................33
5.1 Troubleshooting the device .....................................................33
5.2 Maintenance............................................................................37
Appendix................................................................................38
Glossary ..................................................................................38
Daily log of RMLD self-test and calibration .............................40
1
Overview
The Methane Leak Detector (RMLD™) uses state-of-the-art tech-
nology to identify methane leaks from a considerable distance.
The RMLD the rst of a new generation of leak monitoring devices
that signicantly improve the productivity and safety of mobile
monitoring activities.
Using the RMLD, it is now possible to monitor areas that are hard
to reach or are not easy to access. The use of TDLAS (Tunable
Diode Laser Absorption Spectroscopy) laser technology means
that the RMLD does not need to be located directly in the gas
plume. As the laser passes through a gas plume, the methane
absorbs a portion of the light, which is then detected by the
RMLD. This technology makes it possible to detect leaks along
the line of sight without always having to walk the full length of
the gas pipe.
Figure 1-2
Remote detection using laser technology, allows areas to be safely
monitored that may otherwise be difcult to reach, such as busy
roads, properties with guard dogs, fenced off areas, and other
hard to access places.
Road (asphalt)
Fence
Gas pipe
Kerb
Leak
2
The device is designed to selectively detect methane only, and
will not give a false alarm should other hydrocarbon gases
be present. Gas concentration is calculated according to the
amount of infrared light absorbed by the gas. Because the gas
is detected along the line of sight of the laser, the concentration
is given in ppm•m (parts-per-million•meter). In other words, the
RMLD measures the concentration of the gas cloud multiplied
by its width. Depending on the local meteorological conditions,
a given amount of gas escaping from the ground will produce a
plume that varies in size and uniformity of concentration levels.
Gas plumes are variable in nature and depend on the soil condi-
tions, temperature, wind, and leak rate.
The RMLD consists of two main components that interact with
each other:
Transceiver
Controller
Figure 1-3: The RMLD system consists of a laser transmitter/receiver and
a controller
3
The transceiver has two lasers. The infrared laser is invisible
and is continuously active when the device is switched on. The
visible green spotter laser must be activated by the operator by
pressing the trigger button.
The RMLD can be operated in a wide variety of environmental
conditions, including cold and hot weather and light rain. Its rug-
ged design will withstand normal eld use and operating condi-
tions. Sensitivity and range are not negatively affected by normal
amounts of dust on the optics window.
The RMLD includes integrated self-test and calibration functions
that guarantee correct functioning of the device. The calibration
cell built into the carrying case allows the operator to carry out the
self-test and calibration as part of a daily start up routine. While
in use, the RMLD continuously monitors several parameters to
ensure that the instrument is functioning correctly. Should any
of these parameters exceed the specied operating limits, an
audible alarm will sound and a fault/warning error message will
be shown on the display.
The device is supplied with a training video. It is strongly recom-
mend that all operators view the video in order to learn the basic
techniques required to carry out monitoring using the RMLD.
4
Section I (System description)
1.1 Technical data for the RMLD system
Detection method: TDLAS (Tunable Diode Laser
Absorption Spectroscopy)
Measurement range: 0 to 99,999 ppm•m
Sensitivity: 5 ppm•m at a distance of 0 to 15 m
Min. 10 ppm•m at a distance of 15 to
30 m
Detection range: 30 m (nominal). Actual distances
may vary depending on the type of
background and other conditions.
Beam size: Conical beam, width 56 cm at 30 m
Alarm modes for
detection:
DMD (Digital Methane Detection)
Audible signal, variable pitch accord-
ing to concentration when the alarm
activation threshold is exceeded.
Alarm activation threshold adjustable
from 0 to 255 ppm•m.
Pure Tone
Continuous audible signal, variable
pitch according to concentration.
System fault
warning:
Audible signal and symbol on display
Self-test and
calibration:
Integrated self-test and calibration
function for checking correct operation
and adjusting laser wavelength for best
sensitivity. Gas test cell integrated into
carrying case
Standards complied
with:
EMC (EN 61000-6-2, EN 6100-6-4)
(pending)
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