AFRISO DMU 01 Operational manual

© 2021 AFRISO-EURO-INDEX GmbH – All rights reserved.
Translation of the Lindenstraße 20
Original Operating Manual 74363 Güglingen
Fon: [phone]
Service: [phone]
[e-mail]
www.afriso.com
Pressure Transmitters / screw-in probes
DMU 01, DMU 01 K, DMU 03, DMU 03 HD,
DMU 04, DMU 05P, DMU 07, DMU 07 FG
READ THOROUGHLY BEFORE USING THE
DEVICE
KEEP FOR FUTURE REFERENCE
ID: 900.100.0831 Version: 10.2021.0
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
For specific data on the individual sensors, please
refer to the respective data sheet.
Download these by accessing www.bdsensors.de or
request them by e-mail or phone: [e-mail] |
Fon: [phone]
In addition, the applicable accident prevention
regulations, safety requirements, and country-
specific installation standards as well as the
accepted engineering standards must be observed.
1.1 Symbols Used
Warning word
- Type and source of danger
- Measures to avoid the
danger
Warning word Meaning
DANGER
- Imminent danger!
- Non-compliance will
result in death or serious
injury.
WARNING
- Possible danger!
- Non-compliance may
result in death or serious
injury.
CAUTION
- Hazardous situation!
- Non-compliance may result
in minor or moderate injury.
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.
The pressure transmitters are exclusively suited
for measuring positive, negative and absolute
pressures.
The screw-in probes are exclusively suited to
filling-level and process measuring technology.
The user must check whether the device is suited
for the selected use. In case of doubt, please
contact our sales department ([e-mail]).
AFRISO assumes no liability for any wrong selection
and the consequences thereof!
The fluids that can be measured are gases and
liquids that are compatible with the materials in
contact with the fluids, described in the data sheet.
For application, it must additionally be ensured that
the fluid is compatible with the parts in contact with
the fluid.
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 – 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!
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 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 transducer or screw-in probe
- for mech. connections to DIN 3852: O-ring
(premounted)
- this operating manual
2. Product Identification
The device can be identified by means of the type
plate with order code. The most important data can
be gathered therefrom.
1 2 3 4 5 6
1Type designation 4Order code
2Input 5Terminal assignment
3Output 6Serial number
Fig. 1: Type plate
NOTE – The type plate must not be removed!
3. Mounting
3.1 Mounting and Safety Instructions
DANGER
- airborne parts, leaking fluid,
electric shock
- Always mount the device in a
depressurized and de-
energized condition!
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.
NOTES – for mounting outdoors or in a moist
environment:
- Connect the device electrically straightaway after
mounting or prevent moisture penetration, e.g. by
a suitable protective cap. (The protection rating
specified on 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 unfavorable
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!
- A device with gauge reference in the housing
(small hole next to the electrical connection) must
be mounted such that the gauge reference is
protected against dirt and humidity. If the
transducer is exposed to liquid admission, the
gauge reference will be blocked, and the
equalization of air pressure will be prevented. In
this condition, a precise measurement is
impossible and damage to the transducer may
occur.
- Provide for a cooling section if the device is used
in a steam line.
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 and devices with a pressure connection/port
made of plastic.
NOTE – In hydraulic systems, arrange the device
such that the pressure port points upwards.
(venting)
NOTE – If the device is installed with the pressure
port pointing upwards, ensure that no liquid drains
off on the device. This could result in humidity and
dirt blocking the gauge reference in the housing,
and could lead to malfunctions. If necessary, dust
and dirt must be removed from the edge of the
screwed joint of the electrical connection.
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 specified tightening torques must not
be exceeded!
3.2 Mounting Steps for Connections According
to DIN 3852
NOTE –Do not use any additional sealing material
such as tow, 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. (RZ 6.3)
1 Screw the device into the mating thread by
hand.
2 Devices with a wrench flat must be tightened
using a suitable open-end wrench.
Wrench flat made of steel:
G1/4: approx. 5 Nm; G1/2: approx. 10 Nm;
G3/4: approx. 15 Nm; G1: approx. 20 Nm
Wrench flat made of plastic:
max. 3 Nm)
3 Devices equipped with a knurled ring:
only tighten by hand
3.3 Mounting Steps for Connections According
to EN 837
A suitable seal for the measured fluid and the
pressure to be measured is available. (e.g. a
copper seal)
The sealing face of the mating component has
a flawless surface. (RZ 6.3)
1 Screw the device into the mating thread by
hand.
2 Then tighten it using an open-end wrench: G1/4:
approx. 20 Nm; G1/2: approx. 50 Nm
3.4 Mounting Steps for NPT Connections
Suitable fluid-compatible sealing material, e.g.
PTFE tape, is available.
1 Screw the device into the mating thread by hand
2 Then tighten it using an open-end wrench: 1/4
NPT: approx. 30 Nm; 1/2 NPT: approx. 70 Nm
3.5 Mounting Steps for Female Threads M20x1.5
and 9/16 UNF (for Extreme-Pressure Devices)
WARNING
- Due to wrong installation
- Do not use any seal!
NOTE – The high-pressure tube will seal metallically
in the chamfer on the pressure port. (sealing cone
60°)
1 Screw the high-pressure fitting into the female
thread on the pressure transducer.
2 Then tighten it using an open-end wrench:
approx. 120 Nm.
3.6 Mounting Steps for Milk Pipe Connections
The O-ring is undamaged and seated in the
designated groove.
1 Center the milk pipe connection in the
corresponding mating fitting.
2 Screw the sleeve nut onto the mating fitting.
3 Then tighten it using a hook wrench.
3.7 Mounting Steps for Clamp and Varivent®
Connections
A suitable seal for the measured fluid and the
pressure to be measured is available.
1 Place the seal onto the corresponding mating
fitting
2 Center the clamp connection or Varivent
connection above the corresponding mating
fitting
3 Then fasten the device using a suitable fastener
(e.g. half-ring or retractable ring clamp
connection) according to the instructions
specified by the manufacturer
3.8 Mounting Steps for Flange Connections
A suitable seal for the measured fluid and the
pressure to be measured is available. (e.g. a
fiber seal)
1 Position the seal between the connecting flange
and the mating flange
2 Then attach the device to the mating flange
using 4 or 8 bolts/nuts (depending on flange
design)
4. Electrical Connection
4.1 Connection and Safety Instructions
WARNING
-
Improper installation may result
in electric shock
- Always mount the device in a
depressurized and de-
energized condition!
NOTE –If the device is equipped with a cable
fitting and/or cable box, it must be ensured that the
outer diameter of the line used is within the
permissible clamping range. Additionally it must be
ensured that this is seated firmly and gaplessly in
the cable fitting!
NOTE –Use a shielded and twisted multicore cable
for the electrical connection.
NOTE –for devices with cable outlet
- When routing the cable, the following minimum
bend radii must be observed:
Cable without air hose:
fixed installation: 5-fold cable diameter
flexible use: 10-fold cable diameter
Cable with air hose:
fixed installation: 10-fold cable diameter
flexible use: 20-fold cable diameter
- In case of devices with cable outlet and
integrated ventilation hose, the PTFE filter
located at the cable end on the relative pressure
hose must neither be damaged nor removed!
NOTE –When devices with ISO 4400 are used, the
cable box must be properly mounted so that the
protection rating specified on the data sheet is
ensured! Ensure that the seal supplied is installed
between the connector and the cable box. After
connecting the cable, attach the cable box to the
device by means of the screw.
NOTE –On a device equipped with field housing,
the connection terminals are located underneath the
housing cover. The cover must be screwed off in
order to connect the device electrically. Before the
cover is screwed on again, the O-ring and sealing
surface on the housing must be checked for damage
and, if necessary, replaced! Then screw on the
cover by hand and make sure that the field housing
is tightly closed again.

Supply + / in +
Supply – / in -
UB
A
p
I
4.3 Electrical Installation
Connect the device electrically according to the
information specified on the type plate, the following
table, and the connection circuit diagram.
Terminal assignment table:
Electrical
connections ISO 4400
Binder
723 (5-
pin)
M12x1
(4-pin)
Supply +
Supply −
1
2
3
4
1
2
Shield
ground
pin
5 4
Electrical
connections
Bayonet MIL-C-26482 (10-6)
Supply +
Supply −
A
B
Shield
Pressure port
Electrical
connections
Field housing
Cable colors
(IEC 60757)
Supply +
Supply −
IN +
IN -
wh (white)
bn (brown)
Shield
gnye (green-
yellow)
Fig. 4: Connection circuit diagram
NOTE –For unambiguous identification, the
intrinsically safe cable is marked with a light blue
shrinkable tube (around the cable insulation). If a
modification (e.g. a shortening) of the cable is
inevitable whereby the marking at the end of the
cable is lost, the marking must be restored!
(Renewed marking by a light blue shrinkable tube or
by an appropriate marking label)
NOTE –In the case of relative pressure gauges, the
cable contains a ventilation hose for pressure
equalization. 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.
5. Commissioning
The device has been installed properly
The device does not have any visible defect
In case of highly precise devices with an
accuracy of 0.1 % FSO, a microcontroller-controlled
electronic system is used for signal processing. This
electronic system is used for signal improvement.
Due to the principle, the processing of measured
values requires a longer time than with purely
analog sensors, which only comprise amplification
circuitry. Due to the longer processing time, the
output signal follows the measured value not
continuously but in jumps. In case of relatively
stable and slowly changing measured values, this
property plays a minor role. Compare this with the
information on the adjusting time in the data sheet.
In the case of i-devices with communications
interface, the offset, range, and damping can be
adjusted within the limits specified in the data sheet,
due to the electronic system. The CIS 510
programming kit is required for the configuration.
The kit consists of: Adapt 1, Windows®-compatible
P-Scale 510 programming software, power pack
and connection cable. This can be ordered from
AFRISO as an accessory.
6. Maintenance
DANGER
- Airborne parts, leaking fluids,
electric shock
- Always service the device in a
depressurized and de-
energized condition!
Attention
- due to aggressive fluids
- Wear suitable protective
clothing,
e.g. gloves, safety goggles.
In principle, the device requires no maintenance.
If necessary, clean the housing of the device using a
moist cloth and a non-aggressive cleaning solution.
Cleaning of the diaphragm:
Deposits or contamination may occur on the
diaphragm in case of certain fluids. It is
recommended to establish appropriate maintenance
intervals for checking in connection with a function
control purposes.
Clean the diaphragm cautiously using a non-
aggressive cleaning solution and a soft paintbrush
or sponge.
If the diaphragm is calcified, it is recommended to
have the decalcification performed by AFRISO.
Please note the chapter “Service/Repair” with regard
to this.
NOTE –Wrong cleaning may damage the
measuring cell beyond repair. Do not use any sharp
or pointed item to clean the diaphragm.
7. Troubleshooting
CAUTION
- Airborne parts, leaking fluids,
electric shock
- If malfunctions cannot be
resolved, put the device out of
service and proceed according
In case of malfunction, it must be checked whether
the device has been correctly installed mechanically
and electrically. Use the following table to analyze
the cause and resolve the malfunction, if possible.
Fault: no output signal
Possible cause
Fault detection / remedy
connected incorrectly
Checking of connections
Conductor/wire breakage
Checking of all line
connections.
Defective measuring
device (signal input)
Checking of ammeter
(miniature fuse) or of
analog input of your
signal processing unit
Fault: analog output signal too low/small
Possible cause
Fault detection / remedy
Load resistance too high
Checking of load
resistance (value)
Supply voltage too low
Checking of power pack
output voltage
Defective energy supply
Checking of the power
pack and the supply
voltage being applied to
the device
Fault: slight shift of the output signal
Possible cause
Fault detection / remedy
Diaphragm of measuring
cell is severely
contaminated
Cleaning using a non-
aggressive cleaning
solution and soft
paintbrush or sponge
Diaphragm of measuring
cell is calcified or crusted
Recommendation: Have
the decalcification or
cleaning performed by
AFRISO
Fault: large shift of the output signal
Possible cause
Fault detection / remedy
Diaphragm of measuring
cell is damaged (caused
by overpressure or
mechanically)
Checking of diaphragm;
when damaged, send the
device to AFRISO for
repair
Fault: wrong or no output signal
Possible cause
Fault detection / remedy
Cable damaged
mechanically, thermally or
chemically
Checking of cable; pitting
corrosion on the stainless
-
steel housing as a result
of damage on cable; when
damaged, send the device
to AFRISOfor repair
8. Removal from Service
DANGER
- Airborne parts, leaking fluids,
electric shock
- Always dismount the device in
a depressurized and de-
energized condition!
Attention
- due to aggressive fluids.
- Wear suitable protective
clothing, e.g. gloves, safety
goggles.
NOTE – After dismounting, mechanical connections
must be fitted with protective caps.
9. Service/Repair
Information on service / repair:
- www.afriso.com
- [e-mail]
- [e-mail]
9.1 Recalibration
The offset value or range value may shift during the
life of the device. In this case, a deviating signal
value in relation to the set lower or upper measuring
range value is output. If one of these two
phenomena occurs after extended use, a
recalibration in the factory is recommended. Please
note the chapter “Service/Repair” with regard to this.
9.2 Returning the device
Get in touch with us before returning your product
([e-mail]).
10. Decommissioning, diposal
Dispose of the product in compliance with
all applicable directives, standards and
safety regulations.
Electronic components must not be
disposed of together with the normal
household waste.
1. Disconnect the product from
mains.
2. Dismount the product (see
chapter "Mounting the control
unit", reverse sequence of
steps).
11. Warranty
See our terms and conditions at www.afriso.com or
your purchase contract for information on warranty.
12. EU Declaration of Conformity