BD Sensors DMD 331 Operating Manual

EN
Operating Manual
Differential pressure transmitter
DMD 331 and DMD 341
DMD 331
www.bdsensors.com
Headquarters Eastern Europe
BD SENSORS GmbH BD SENSORS s.r.o.
BD-Sensors-Str. 1 Hradištská 817
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Russia China
BD SENSORS RUS BD SENSORS China Co, Ltd.
th
39a, Varshavskoe shosse 6 Floor, Building B, No. 8
RU - Moscow 117105 Lane 658 Jinzhong Rd.
200335 Shanghai, CN
Russia China
Tel.: +7 (0) 95-380 1683 Tel.: +86 (0) 21-51600 190
Fax: +7 (0) 95-380 1681 Fax: +86 (0) 21-33600 610
further agencies in:
EUROPE
• Belgium • Romania
• Denmark • Sweden
• Finland • Switzerland
• France • Slovakia
Great Britain • Spain
•
Greece • Turkey
•
• Italy • UK
• Lithuania • Ukraine
• Luxemburg
• Netherlands
AFRICA
• Norway
• Egypt
Poland
•
• South Africa
• Portugal
The addresses of our distribution partners are listed on our
homepage www.bdsensors.com. It is possible to download
data sheets, operating manuals, ordering codes and certifi-
cates, as well.
1. General information
1.1 Information on the operating manual
This operating manual contains important information on
proper usage of the device. Read this operating manual
carefully before installing and starting up the pressure
measuring device.
Adhere to the safety notes and operating instructions which
are given in the operating manual. Additionally applicable
regulations regarding occupational safety, accident preven-
tion as well as national installation standards and engineer-
ing rules must be complied with!
This operating manual is part of the device, must be kept
nearest its location, always accessible to all employees.
This operating manual is copyrighted. The contents of this
operating manual reflect the version available at the time of
printing. It has been issued to our best knowledge. BD
SENSORS is not liable for any incorrect statements and their
effects.
- Technical modifications reserved –
1.2 Symbols used
U U U U
DANGER! – dangerous situation, which may result in
death or serious injuries
U U U U
WARNING! – potentially dangerous situation, which
may result in death or serious injuries
U U U U
CAUTION! – potentially dangerous situation, which may
result in minor injuries
!
CAUTION! – potentially dangerous situation, which may
result in physical damage
NOTE – tips and information to ensure a failure-free
operation
1.3 Target group
U U U U
WARNING! To avoid operator hazards and damages of
the device, the following instructions have to be worked
out by qualified technical personnel.
1.4 Limitation of liability
By non-observance of the operating manual, inappropriate
use, modification or damage, no liability is assumed and
warranty claims will be excluded.
1.5 Intended use
- The differential
DMD 331_540 and DMD 341 are intended for industrial
applications. For both sided pressure admission, the dif-
ference of the pressure between positive and negative
side is established and converted into a proportional
electrical signal. The DMD 331 is intended e.g. in engi-
neering and plant construction for filter controlling and
flow measurement as well as in hydraulic applications.
The DMD 341 is intended for the application in the filter
controlling and air conditioning technology.
- It is the operator's responsibility to check and verify the
suitability of the device for the intended application. If
any doubts remain, please contact our sales depart-
ment in order to ensure proper usage. BD SENSORS is
not liable for any incorrect selections and their effects!
- Permissible media are gases or liquids, specified in the
data sheet. In addition it has to be ensured, that this
medium is compatible with the media wetted parts.
- The technical data listed in the current data sheet are
engaging and must be complied with. If the data sheet is
not available, please order or download it from our
homepage. (http://www.bdsensors.com)
U U U U
WARNING! – Danger through improper usage!
1.6 Package contents
Please verify that all listed parts are undamaged included in
the delivery and check for consistency specified in your
order:
- differential pressure transmitter
ASIA
- mounting instructions
• India
• Iran
2. Product identification
• Israel
• Japan
The device can be identified by its manufacturing label. It
• Kazakhstan
provides the most important data. By the ordering code the
• Malaysia
product can be clearly identified.
• Singapore
• Taiwan
• Thailand
type
• Vietnam
designation
nominal
AUSTRALIA
range
differential
pressure
range
signal
Fig. 1 manufacturing label
!
The manufacturing label must not be removed from the
device!
3. Mechanical installation
3.1 Mounting and safety instructions
U U U U
WARNING! Install the device only when depressurized
and currentless!
U U U U
WARNING! This device may only be installed by
qualified technical personnel who has read and under-
stood the operating manual!
!
Handle
measuring device with care, both in packed and
unpacked condition!
!
There are no modifications/changes to be made on the
device.
!
Do not throw the device!
!
To avoid damaging the diaphragm, remove packaging
and protective cap directly before starting assembly.
The delivered protective cap has to be stored!
!
Place the protective cap on the pressure port again
immediately after disassembling.
pressure transmitters DMD 331,
ordering
code
serial
number
connector
pinout
supply
input "p+" input "p-"
this high-sensitive electronic precision
!
Do not use any force when installing the device to
prevent damage of the device and the plant!
!
Make sure that no mechanical stresses occur at the
pressure port with low pressure ranges during installa-
tion, as this may cause a shifting of the characteristic
curve.
!
For the connection of the pressure lines, a sealing has
to be installed by the operator.
!
For the pipe assembly, a stress free installation must be
observed.
!
Consider for the installation of a DMD 331 that the
pressure ports must not be turned against the housing!
!
For installations outdoor and in damp areas following
these instructions:
- To prevent moisture admission in the plug the de-
vice should be installed electrically after mounting,
at once. Otherwise a moisture admission has to be
blocked e.g. by using a suitable protection cap.
(The ingress protection in the data sheet is valid
for the connected device.)
- Choose an assembly position, which allows the
flow-off of splashed water and condensation. Avoid
permanent fluid at sealing surfaces!
- When using a cable socket device, turn the outgo-
ing cable downwards. If the cable has to be turned
upwards, then point it downward so the moisture
can drain.
- Install the device in such a way that it is protected
from direct solar irradiation. Direct solar irradiation
can lead to the permissible operating temperature
being overstepped in the worst case. By this the
operability of the device can be affected or dam-
aged. If the internal pressure increases due to so-
lar irradiation, measurement errors may be caused.
Take note that no assembly stress occurs at the
pressure port, since this may cause a shifting of the
characteristic curve.
Provide a cooling line when using the device in steam
piping.
If installing the device outdoor and there is any danger
of lightning or overpressure we suggest putting a
overpressure protection unit between the supply/switch
cabinet and the device to prevent damage.
3.2 General installation steps
- Carefully remove the pressure measuring device from
the package and dispose of the package properly.
- Connect the reference pressures according to the fol-
lowing installation steps. Therefore, keep in mind that
the higher pressure has to be connected with input "p+";
lower pressure has to be connected with input "p-".
- Fix the device according to your demands on the holder
or holding angle intended for it. For mounting the de-
vice, mounting threads are provided. For DMD 341, in
addition, the possibility is given to mount the device by
using the two holes (∅ 4.5 mm). The exact position is
defined in the data sheet.
3.3 Installation steps for G 1/2" acc. to EN 837 (DMD 331)
- Use suitable cooper gaskets for each pressure port,
corresponding to the diameter of the threads which
should be screwed in. (seals are not included in the
scope of delivery)
- Ensure that the sealing surfaces are perfectly smooth
and clean.
- Screw your fittings by hand onto the threads.
- To tighten the fittings properly, hold the DMD 331 on the
spanner flat SW 22 of the respective pressure port with
one hand and then tighten it (max. 50 Nm).
3.4 Installation steps for G 1/4" internal thread (DMD 331)
- Check to ensure that the o-rings fit properly into the
grooves. (o-rings are included in the scope of delivery)
- Make sure that the sealing surfaces of the fittings are
perfectly smooth and clean.
- Screw the fittings into the threads by hand.
- To tighten the fittings properly, hold the DMD 331 on the
spanner flat SW 22 of the respective pressure port with
one hand and then tighten it (max. 20 Nm).
3.5 Installation steps for G 7/16" UNF (DMD 331)
- Seal the pressure ports of the differential pressure
transmitter in a way that is suitable for your application.
(seals are not included in the scope of delivery)
- Screw your fittings by hand onto the threads.
- To tighten the fittings properly, hold the DMD 331 on the
spanner flat SW 22 of the respective pressure port with
one hand and then tighten it (max. 30 Nm).