BD Sensors DX14A-DMK 456 Operating Manual

BD-Sensors-Str.1; 95199 Thierstein, Germany
Phone: +49 (0) 92 35 98 11 0 | www.bdsensors.de
Operating Manual
Pressure Transmitter for Shipbuilding and Offshore
Applications for IS-Areas
DX14A-DMK 456, DX14A-DMK 458,
DX19-DMK 457, DX19-DMP 457
0637
READ THOROUGHLY BEFORE USING THE DEVICE
KEEP FOR FUTURE REFERENCE
ID: BA_DMU_Schiff_Ex_E | Version: 04.2023.0
1. General and safety-related information on
this operating manual
This operating manual enables safe and proper handling of the
product, and forms part of the device. It should be kept in close
proximity to the place of use, accessible for staff members at
any time.
All persons entrusted with the mounting, installation, putting into
service, operation, maintenance, removal from service, and
disposal of the device must have read and understood the
operating manual and in particular the safety-related information.
The following documents are an important part of the
operating manual:
- Data sheet
- Type-examination certificate
For specific data on the individual device, please refer to the
respective data sheet.
Download these by accessing www.bdsensors.de or request
them: info@bdsensors.de | phone.: +49 (0) 92 35 / 98 11 0
The IS versions of our products are variants of the standard
products.
Example:
Standard: DMK 456  Ex-Version: DX14A-DMK 456
In addition, the applicable accident prevention regulations,
safety requirements, and country-specific installation standards
as well as the accepted engineering standards must be
observed.
For the installation, maintenance and cleaning of the device, the
relevant regulations and provisions on explosion protection
(VDE 0160, VDE 0165 and/or EN 60079-14) as well as the
accident prevention regulations must absolutely be observed.
The device was designed by applying the following standards:
DX14A: EN 60079-0:2012+A11:2013
EN 60079-11:2012
DX19: EN IEC 60079-0:2018
EN 60079-11:2012
IECEx IBE 12.0027X:
IEC 60079-0: 2011 Edition 6
IEC 60079-11: 2011 Edition 6
1.1 Symbols used
- Type and source of danger
- Measures to avoid the danger
Warning word
Warning word Meaning
- Imminent danger!
- Non-compliance will result in
death or serious injury.
DANGER
- Possible danger!
- Non-compliance may result in
death or serious injury.
WARNING
- Hazardous situation!
- Non-compliance may result in
minor or moderate injury.
CAUTION
NOTE
- draws attention to a possibly hazardous situation that
may result in property damage in case of non-compliance.

Precondition of an action
1.2 Staff qualification
Qualified persons are persons that are familiar with the
mounting, installation, putting into service, operation,
maintenance, removal from service, and disposal of the product
and have the appropriate qualification for their activity.
This includes persons that meet at least one of the following
three requirements:
- They know the safety concepts of metrology and
automation technology and are familiar therewith as
project staff.
-
They are operating staff of the measuring and
automation systems and have been instructed in the
handling of the systems. They are familiar with the
operation of the devices and technologies described in
this documentation.
-
They are commissioning specialists or are employed in
the service department and have completed training that
qualifies them for the repair of the system. In addition,
they are authorized to put into operation, to ground, and
to mark circuits and devices according to the safety
engineering standards.
All work with this product must be carried out by qualified
persons!
1.3 Intended use
The devices are used to convert the physical parameter of
pressure into an electric signal.
Pressure transmitters DMK 456, DMK 457, DMK 458 and
DMP 457 have been designed for typical applications in
shipbuilding and offshore constructions. They are suitable for
measuring tasks with fluids and gases. Typical applications of
DMK 456 and DMK 458 are pressure monitoring for loading and
discharge processes as well as level measurement for ballast
and product storage tanks. Preferred areas of usage for
DMK 457 are gears, compressors, boilers, pneumatic controls,
elevators, oxygen applications and e.g. level measurement into
ballast tanks, etc. With mechanical versions G1/2" open port or
G1/2" flush DIN 3852 the DMK 457 is especially suited for
viscous, pasty or contaminated media due to the easily
reachable ceramic diaphragm.
Preferred areas of usage for DMP 457 are diesel engines,
gears, compressors, pumps, boilers, hydraulic and pneumatic
controls as well as elevators. The pressure transmitters DMK
456, DMK 457, DMK 458 and DMP 457 are certificated by Det
Norske Veritas (DNV) as standard. The certificates are available
for download on our homepage: www.bdsensors.de
This operating manual applies to devices with explosion
protection approval and is intended for the use in IS-areas.
A device has an explosion-protection approval if this was
specified in the purchase order and confirmed in our order
acknowledgement. In addition, the manufacturing label includes
a sign.
The user must check whether the device is suited for the
selected use. In case of doubt, please contact our sales
department: info@bdsensors.de | phone: +49 (0) 92 35 98 11 0
BD|SENSORS assumes no liability for any wrong selection and
the consequences thereof!
Permissible media are gases or liquids, which are compatible
with the media wetted parts described in the data sheet.
The technical data listed in the current data sheet are engaging
and must absolutely be complied with. If the data sheet is not
available, please order or download it from our homepage:
http://www.bdsensors.de
Danger through incorrect use
- In order to avoid accidents, use the
device only in accordance with its
WARNING
intended use.
1.4 Limitation of liability and warranty
Failure to observe the instructions or technical regulations,
improper use and use not as intended, and alteration of or
damage to the device will result in the forfeiture of warranty
and liability claims.
1.5 Safe handling
NOTE
- Do not use any force when installing the device to
prevent damage of the device and the plant!
NOTE
- Treat the device with care both in the packed and
unpacked condition!
NOTE
- The device must not be altered or modified in any way.
NOTE
- Do not throw or drop the device!
NOTE
- Excessive dust accumulation (over 5 mm) and
complete coverage with dust must be prevented!
NOTE
- The device is state-of-the-art and is operationally
reliable. Residual hazards may originate from the device if it is
used or operated improperly.
1.6 Safety-related maximum values
supply and signal circuit:
DX14A-DMK 456; DX14A-DMK 458 with field housing:
U = 28 V; I = 93 mA; P = 660 mW; C = 52.3 nF;
i i i i
L = 0 µH; C = 90.2 nF
i i
DX14A-DMK 458 with ISO 4400, M12x1, cable outlet:
U = 28 V; I = 93 mA; P = 660 mW; C = 105 nF;
i i i i
L = 0 µH; C = 140 nF;
i i
plus cable inductivities 1 µH/m and
cable capacities 160 pF/m (for cable by factory)
DX19-DMK 457, DX19-DMP 457:
≈ 0 µH
= 28 V, I = 93 mA, P = 660 mW, L
U
i i i i
with field housing: C = 105 nF, C = 140 nF
i iGND
with cable outlet: C = 84.7 nF, C = 90 nF
i iGND
with ISO 4400: C = 62.2 nF, C = 90 nF;
i iGND
plus cable inductivities 1 µH/m and
cable capacities 160 pF/m (for cable by factory)
permissible temperatures for environment:
DX14A-DMK 456: -20 ... 60 °C
DX14A-DMK 458:
in zone 0 (p 0.8 up to 1.1 bar): -20 ... 60 °C
atm
in zone 1 or higher: -25 ... 70 °C
DX19-DMK 457, DX19-DMP 457:
in zone 0 (p 0.8 up to 1.1 bar): -20 ... 60 °C
atm
in zone 1 or higher: -40/-20 ... 70 °C
1.7 Scope of delivery
Check that all parts listed in the scope of delivery are included
free of damage, and have been delivered according to your
purchase order:
- pressure transmitter
- for mechanical pressure ports DIN 3852:
O-ring (pre-mounted)
- this operating manual
2. Product identification
The device can be identified by means of the manufacturing
label with order code. The most important data can be gathered
therefrom.
Ordering code Serial number
Type designation
EU-type examination certificate no., Safety technical
explosion marking maximum values
Fig. 1: Example of manufacturing label
3. Mounting
3.1 Mounting and safety instructions
Danger of death from explosion,
airborne parts, leaking fluid, electric
shock
-
Always mount the device in a
depressurized and de-energized
DANGER
condition!
- Do not install the device while there is
a risk of explosion.
NOTE
- The technical data listed in the EU-type examination
certificate are binding. Download this by accessing
www.bdsensors.de or request it by e-mail or phone:
info@bdsensors.de | phone: +49 (0) 92 35 98 11 0
NOTE
- Make sure that the entire interconnection of
intrinsically safe components remains intrinsically safe. The
owner-operator is responsible for the intrinsic safety of the
overall system (entire circuitry).
NOTE
- If there is increased risk of damage to the device by
lightning strike or overvoltage, increased lightning protection
must additionally be provided!
NOTE
- Treat any unprotected diaphragm with utmost care;
this can be damaged very easily.
NOTE
- Provide a cooling line when using the device in steam
piping.
NOTE
- When installing the device, avoid high mechanical
stresses on the pressure port! This will result in a shift of the
characteristic curve or to damage, in particular in case of very
small pressure ranges.
NOTE -
In hydraulic systems, position the device in such a
way that the pressure port points upward (ventilation).
NOTE
- Do not remove the packaging or protective caps of the
device until shortly before the mounting procedure, in order to
exclude any damage to the diaphragm and the threads!
Protective caps must be kept! Dispose of the packaging
properly!
NOTE
- The permissible tightening torque depends on the
conditions on site (material and geometry of the mounting point).
The specified tightening torques for the pressure transmitter
must not be exceeded!
NOTES -
for mounting outdoors or in a moist
environment:
- Please note that your application does not show a dew point,
which causes condensation and can damage the pressure
transmitter. There are specially protected pressure
transmitters for these operating conditions. Please contact us
in such case.
- Connect the device electrically straightaway after mounting or
prevent moisture penetration, e.g. by a suitable protective
cap. (The ingress protection specified in the data sheet
applies to the connected device.)
- Select the mounting position such that splashed and
condensed water can drain off. Stationary liquid on sealing
surfaces must be excluded!
- If the device has a cable outlet, the outgoing cable must be
routed downwards. If the cable needs to be routed upwards,
this must be done in an initially downward curve.
- Mount the device such that it is protected from direct solar
radiation. In the most unfavourable case, direct solar radiation
leads to the exceeding of the permissible operating
temperature. This must be excluded if the device is used in
any explosion-hazardous area!
- For devices with gauge reference in the housing (small hole
next to the electrical connection), install the device in such a
way, that the gauge reference is protected from dirt and
moisture. Should the device be exposed to fluid admission,
the functionality will be blocked by the gauge reference. An
exact measurement in this condition is not possible.
Furthermore, this can lead to damages on the device.
3.2 Conditions for oxygen applications
Danger of death from explosion
- when used improperly
DANGER
Make sure that your device was ordered for oxygen applications
and delivered accordingly. (see manufacturing label - ordering
code ends with the numbers "007")
Unpack the device directly prior to the installation.
Skin contact during unpacking and installation must be avoided
to prevent fatty residues remaining on the device.
Wear safety gloves!
The entire system must meet the requirements of BAM
(DIN 19247)!
For oxygen applications > 25 bar, devices without seals are
recommended.
Transmitters with o-rings of FKM (Vi 567):
permissible maximum values: 25 bar / 150° C (BAM approval)
3.3 Mounting steps for connections according
to DIN 3852
NOTE -
Do not use any additional sealing material such as
yarn, hemp or Teflon tape!

The O-ring is undamaged and seated in the designated
groove.

The sealing face of the mating component has a flawless
surface. (R 3.2)
Z
1 Screw the device into the corresponding thread by hand.
2 Then tighten it using an open-end wrench. Permissible
tightening torques for pressure transmitter:
G1/4": approx. 5 Nm G1/2": approx. 10 Nm
G3/4": approx. 15 Nm G1": approx. 20 Nm
G1 1/2": approx. 25 Nm
3.4 Mounting steps for connections according
to EN 837

A suitable seal for the medium and the pressure to be
measured is available. (e.g. a copper seal)

The sealing face of the mating component has a flawless
surface. (R 6.3)
Z
1 Screw the device into the corresponding thread by hand.
2 Then tighten it using an open-end wrench. Permissible
tightening torques for pressure transmitter:
G1/4": approx. 20 Nm G1/2": approx. 50 Nm
NOTE
– note the permitted pressure according to EN 837.
3.5 Mounting steps for NPT connections

Suitable fluid-compatible sealing material, e.g. PTFE tape,
is available.
1 Screw the device into the corresponding thread by hand
2 Then tighten it using an open-end wrench. Permissible
tightening torques for pressure transmitter:
1/4" NPT: approx. 30 Nm 1/2" NPT: approx. 70 Nm
3.6 Mounting steps for flange connections

A suitable fluid-compatible sealing is available.
(e.g. a fiber seal)
1 Put the seal between connecting flange and counter flange.
2 Install the device with 4 resp. 8 screws (depending on
flange version) on the counter flange.
4. Electrical connection
4.1 Connection and safety instructions
Danger of death from electric shock
or explosion
- Explosion hazard if the operating
voltage is too high (max. 28 V
by opening the field housing while an
explosion hazard exists.
- Always mount the device in a
depressurized and de-energized
DANGER
condition!
-
Do not install the device while there is
a risk of explosion.
- Operate the device only within the
specification! (data sheet)

The limit values listed in the EU-type examination certificate
are observed. (Capacity and inductance of the connection
cable are not included in the values.)

The supply corresponds to protection class III (protective
insulation).
NOTE -
Use a shielded and twisted multicore cable for the
electrical connection.
NOTE -
for devices with plug ISO 4400 or field housing:
- It must be ensured that the external diameter of the used
cable is within the permissible clamping range:
cable socket ISO 4400 - code G00: Ø 10 ... 14 mm
code G01: Ø 4.5 ... 11 mm
code G10: Ø 4 ... 6 mm
field housing code 880: Ø 5 ... 14 mm
- Ensure that the cable lies in the cable gland firmly and
cleftlessly!
NOTE -
On devices with field housing, the terminal clamps
are situated under the metal cap. To install the device
electrically, the cap must be screwed off. Before the cap is
screwed on again, the O-ring and the sealing surface on the
housing have to be checked for damages and if necessary to be
changed! Afterwards screw the metal cap on by hand and make
sure that the field housing is firmly locked again.
NOTE -
When devices with ISO 4400 connector are used, the
cable socket must be properly mounted so that the ingress
protection specified in the data sheet is ensured! Ensure that the
delivered seal is placed between plug and cable socket. After
connecting the cable, fasten the cable socket on the device by
using the screw.
NOTE -
for devices with cable outlet:
- When routing the cable, as bending radiuses has to be
complied the 10-fold cable diameter.
- In case of devices with cable outlet and integrated
ventilation tube, the PTFE filter located at the cable end on
the ventilation tube must neither be damaged nor removed!
Route the end of the cable into an area or suitable
connection box which is as dry as possible and free from
aggressive gases, in order to prevent any damage.
- For a clear identification, the intrinsically safe cables are
marked with light blue shrink tubing (over the cable
insulation). If the cable has to be modified (e. g. shortened)
and the marking at the cable end has been lost in the
process, it must be restored (for example, by marking it
again with light blue shrink tubing or an appropriate
identification sign).
4.2 Conditions for the IS-area
Danger generated by electrostatic charging
Danger of death from explosion
- Explosion hazard due to spark
formation from electrostatic charging
of plastic components.
-
For devices with cable, the cable must
be installed tightly. Generally, a
shielded cable must be used.
DANGER
- Do not clean the device and, if
applicable, the connection cable, in a
dry state! Use a moist cloth, for
example.
Overvoltage protection
If the pressure transmitter is used as electrical equipment of
category 1 G, then a suitable overvoltage protection device must
be connected in series (attend the valid regulations for operating
safety as well as EN60079-14).
Schematic circuit
The operation of an intrinsically safe transmitter in intrinsic safe
areas requires special care when selecting the necessary Zener
barrier or transmitter repeater devices to allow the utilization of
the device's properties to the full extent. The following diagram
shows a typical arrangement of power supply, Zener barrier and
transmitter.
transmitter Zener barrier
+V
S
V
S
IS-area
shielded cable
transmitter amplifier
Fig. 2 circuit diagrams
NOTE -
Observe item (17) of the type-examination certificate
which specifies special conditions for intrinsically safe operation.
Exemplary circuit description
The supply voltage of e.g. 24 V provided by the power supply
DC
is led across the Zener barrier. The Zener barrier contains series
resistances and breakdown diodes as protective components.
Subsequently, the operating voltage is applied to the transmitter
and, depending on the pressure, a particular signal current
flows.
Danger of death from explosion
- Operation of intrinsically safe devices
as zone-0 equipment only with
ungrounded and galvanically isolated
DANGER
power supply.
Functional selection criteria for Zener barriers and
galvanic power supply
The minimum supply voltage V of the transmitter must not
S min
fall short since a correct function of the device can otherwise not
be guaranteed. The minimum supply voltage has been defined
in the respective product-specific data sheet under "Output
signal / supply".
When using a galvanically insulated amplifier with linear
bonding, note that the terminal voltage of the transmitter will
decrease like it does with a Zener barrier. Furthermore, you
have to note that the supply will additionally decrease with an
optionally used signal amplifier.
Test criteria for the selection of the Zener barrier
) or
DC
In order not to fall below V , it is important to verify which
S min
minimum supply voltage is available at full level control of the
transmitter. The full level control, i.e. a maximum or nominal
output signal (20 mA), can be reached by applying the maximum
physical input signal (pressure).
The technical data of the barrier will usually provide the
information needed for the selection of the Zener barrier.
However, the value can also be calculated. If a maximum signal
current of 0.02 A is assumed, then – according to Ohm's law – a
particular voltage drop will result from the series resistance of
the Zener barrier.
This voltage drop is subtracted by the voltage of the power
supply and as a result, the terminal voltage is obtained which is
applied on the transmitter at full level control. If this voltage is
smaller than the minimum supply voltage, another barrier or a
higher supply voltage should be chosen.
NOTE -
When selecting the ballasts, the maximum operating
conditions according to the EU-type examination certificate must
be observed. When assessing these, refer to their current data
sheets to ensure that the entire interconnection of intrinsically
safe components remains intrinsically safe.
power supply
+V
S
-V
S
secure area
supply