Oppermann Regelgeräte DD ATEX Series User manual

Pressure dierential monitor DD-...-ATEX
Sensor ventilation air conditioning PG1 | Data sheet No. 13102 | Version 04-2020 | 1| 4
contacts are shown in
the depressurized state
Pressure range
Details for the setpoint in vertical installation orientation.
The target value (setpoint) can be adjusted with an adjustable
potentiometer using a reference value scale without manome-
ter. The switching dierential can be adjusted with a
screwdriver.
Function / installation / electrical
connection / startup
All work (such as installation, electrical connection, startup,
operation, and maintenance) must only be performed by
suciently qualied tradesmen. The respectively applicable
local rules and regulations (e.g. national building codes,
electrical/VDE regulations, etc.) must be observed. Installers
and operating entities are required to suciently familiarize
themselves before startup. Read the product description
before operating the equipment. Verify that the product can
be used for the relevant application without restrictions. We
• Atex Zone 1, 2 and 21, 22 |ATEX type exami-
nation certication BVS 06 ATEX E 141X for
gases and dusts |equipment category II 2G
and II 2D |ignition protection type EX ia IIB T4
Gb and Ex ia IIIB T135°C Db.
• Large scale for adjusting switching pressure
• Metric cable threads
• Mounting angle bracket with screw-on or
clip-on fastener
• Duct connection tting length 60 mm
• Vertical and horizontal installation orientation
Technical Data
Membrane material: silicone (others on request)
Permissible ambient
conditions: -20 ºC – +85 ºC
Max. positive
operating pressure: 10 kPa
Pressure ports: P1 + P2 at 6.0 mm diameter
Electrical switch rating: 24 V DC / 100 mA; 30 V DC / 60 mA
Electrical connections: Terminal connector 6.3 x 0.8
DIN 46244 with screw-on terminals
up to 2.5 mm2
Contact arrangement:
Protection type: with protective cover IP 54
Housing material: switch housing: PA 6.6;
mounting bracket: POM
Service life: > 106switching cycles
Applications: Pressure dierential monitor for
monitoring combustible, non-
aggressive gases / vapors.
Compressed media: air and combustible, non-aggressive
gases / vapors
Type Adjustment range
for upper switching
pressure
Switching
dierential
setting
Tolerance
from To
DD-80-EV-ATEX 20 Pa 200 Pa 10 Pa ±15 %
DD-84-EV-ATEX 30 Pa 400 Pa 15 Pa ±15 %
DD-83-EV-ATEX 50 Pa 500 Pa 20 Pa ±15 %
DD-85-EV-ATEX 200 Pa 1,000 Pa 100 Pa ±15 %
DD-86-EV-ATEX 500 Pa 2,500 Pa 150 Pa ±15 %
DD-87-EV-ATEX 1,000 Pa 5,000 Pa 250 Pa ±15 %
p

Pressure dierential monitor DD-...-ATEX
2| 4| Sensor ventilation air conditioning PG1 | Data sheet No. 13102 | Version 04-2020
are not liable for printing errors and changes after printing.
Approved uses also include compliance with operating and
installation instructions. We are not liable for losses due to not
approved uses. Unauthorized or inappropriate manipulations
or modications of the device render the operating permit,
the product warranty and warranty claims null and void.
Modifying the equipment is not authorized and can result in
an explosion hazard (ignition). The contents of the EC type
examination certication are binding and must be observed.
Special requirements or variances from standard conditions
are indicated by an„X“ following the EC type examination
certication. Only appropriately qualied sta (iaw. TRBS
1203; qualied person - [„befähigte Person“]) are authorized
to perform installations, startups, and recurring inspections.
Approved uses: Pressure monitors are used in explosive areas
that qualify as zone 1 or 2 (gases and vapors) as well as 21 and
22 (dusts). Adjustable pressure dierential monitors have the
following primary purposes:
• Monitoring positive, negative pressures or pressure
dierentials of air and other non-aggressive, combustible
gases / vapors (e.g. natural gas, biogas)
• Monitoring air lters and blowers, as well as airow in
ventilation ducts, air-conditioning loops, air heaters etc.
• Function is monitored by monitoring airow (e.g for [air]
lters, air and re dampers, blowers, ventilators or closed
system leakage)
• Level monitoring of liquids
Compliance of your application with important explosion
protection specications must be addressed with markings on
the product [G = gas; D = dust; equipment category 1, 2, 3 or
equipment protection level - EPL in the 3 zones. Gas specica-
tions: temperature class (T1…T6), explosion group (A, B, C)].
Dust:specications: explosion group (III A, B: non-conductive;
IIIC: conductive). Dust accumulations must be avoided to
prevent hazardous overheating of surfaces (installation
orientation, covers, cleaning, ...). Steps must be taken to ensure
that all technical and organizational safety measures are
adhered to, and that the function and eectiveness of these are
veried. The operating entity must issue a work permit before
activities of any kind (installation, ...) are performed in explosive
environments. When performing work such as installation,
electrical connections, repairs, or opening the housing,
particular attention is required to ensure that
• no explosive atmosphere exists
• electrical power has not been connected
• inadvertent switching on is not possible
The device may be used in explosive gas as well as in explosive
dust environments. Two separate areas can be connected with
the pressure ports P1 and P2 (areas 1 and 2). Zone 1, 2 or zone
21, 22 can be applied on the pressure ports (areas 1 and 2). The
environment (area 3) can be zone 1, 2 or zone 21, 22.
An associated i device (safety barrier, switching amplier) must
be installed upstream of the secured area. Compliance with
intrinsic safety must then be documented for the entire i
electrical circuit. The power supply specications (P, I, U) of the
barrier must be lower than, and the specications (L, C) must
exceed those of the pressure monitor and the power supply
cable (color: blue).
Electrical specications:
for gas 2G: 30 VDC, 60 mA oder 24 VDC, 100 mA
for dust 2D: 30 VDC, 60 mA, 0.6 W
Capacitance - Ci 0 μF (negligible)
Inductance - Li 0 mH (negligible)
Please also note the following instructions (among others):
• Cables of intrinsically safe and not intrinsically safe electrical
circuits must be routed separately.
• Intrinsically safe and not intrinsically safe electrical circuits
can be routed together for operating voltages below 42 V AC
or 60 V AC. This only applies to safety barriers with galvanic
isolation.
• Intrinsically safe/not intrinsically safe connected components
Zone
Equipment
category
RL 94/9 EG
Equipment
protection
level-EPL 0 1 2
1 G, D Ga, Da Yes Yes Yes
2 G, D Gb, Db No Yes Yes
3 G, D Gc, Dc No No Yes
Area 3 (environment)
Area 1
Area 2
P1 + - P2
Area 1Area 2 Area 3
Environment
Equipment category
Equipment protection level EPL
Zone 1, 2 Zone 1, 2 Zone 1, 2 2G
Gb
Zone 21,
22 Zone 21, 22 Zone 21, 22 2D Db

Pressure dierential monitor DD-...-ATEX
Sensor ventilation air conditioning PG1 | Data sheet No. 13102 | Version 04-2020 | 3| 4
must be segregated by at least 50 mm (clearance)
• Distance between various intrinsically safe electrical circuits:
at least 6mm
• Clearance of connected components to uninsulated
conducting components: at least 3 mm air gap (housing-
terminals-circuitry, earth, ...)
• Select appropriate cable type; note cable specications
(L, C...), cables must be installed / protected to industry
standards
The following inspections/reviews (among others)
must be performed before installing the device:
• The unit must be free of damage and have no apparent
modications
• The IP protection type must be appropriate for the
application and ambient conditions
• The operating entity must have specied the zones
• The equipment category must correspond to the specied
zones
• On intrinsically safe („i“) systems, the„associated device“
(barrier) must only be installed outside of the explosive
environment.
• Compliance with important explosion protection
specications must be addressed with markings on the
product
Select the installation orientation based in the
following criteria:
• Convenient access when installing, connecting, and
operating
• Protection against weather inuences, such as rain and sun
• The IP protection type of the device must be appropriate for
the ambient conditions
• Dust accumulations must be avoided to prevent hazardous
overheating of surfaces (installation orientation, safety cover,
cleaning, ...)
• We recommend vertical installation orientation with the
pressure ports pointing down. The setpoints are approx. 20
Pa higher for the horizontal installation orientation with AMP
connection lugs pointing up
Note the following issues (among others) when routing
cables:
Cables must be appropriately protected (protective sleeve, ...) if
a risk of mechanical damage exists. The specied cable diameter
must be used to ensure that the cable feed-through is properly
sealed. The cable screws and the screws on the housing cover
must be tightened properly to maintain the IP protection type.
Excessive tightening will damage the housing.
Before connecting cables, verify that the cables to be installed
are disconnected from power. Otherwise, this may create a risk
of igniting an explosive environment. Select the cable material
to ensure that the local requirements for durability (mechanical,
chemical) are adhered to
• The outside diameter can be 5 – 9 mm; conductor cross-
section as per the electrical power and specication sheet.
Minimum cable cross-section: 2 x 1.5 mm² or 1 x 4 mm².
The following issues must be specically observed when
selecting cables for intrinsically safe electrical circuits:
• Diameter of individual cores: greater than 0.1 mm
• Insulation thickness of individual cores: greater than 0.2 mm
• Test voltage of intrinsically safe cables: between cores, shield,
and earth: 500 V AC
• Shield: the shield surface must represent 60 % of the surface
cover or twisted cores
• Marking of intrinsically safe electrical circuits: preferably in
light-blue color
• Cable specications must be available for L and C (Ci = 110
nF/km; Li = 1 mH/km)
Shield must be discharged uni-directionally (to the non-explo-
sive environment). Connect large surface area of shield mesh
to earth. No equipotential compensation current must ow
between the explosive environment and the non-explosive
environment. In this case, a capacitor can be used as a decoup-
ler for EMC purposes (total max. 10 nF). The exterior earthing
clamp on the housing must have a low-resistance connection
to the equipotential compensation of the explosive environ-
ment (discharging electro-static charges between 0.2 - 1 MOhm
does not constitute earthing). No equipotential compensation
current must ow between the explosive environment and the
non-explosive environment. Intrinsically safe electrical circuits:
metal housings do not need to earthed.
The device is immediately ready to operate following proper
installation and connection of the power supply. Adjust the
setpoint and dierential for the application.
Service / maintenance / repair
The condition of the device must be inspected regularly. The
interval depends greatly on local conditions and the load, and
must therefore be adjusted based on requirements. The opera-
ting entity must dene the interval based on local conditions.
Inspection includes: Visual inspection for mechanical damage,
excessive dust accumulations, and other noteworthy observa-
tions or equipment error messages. Inspection of parts (wear
parts) whose function or purpose is changing and are inuen-
cing device functionality. Completed work must be documen-
ted. The interval specied in the regulations applicable for the

Pressure dierential monitor DD-...-ATEX
4| 4| Sensor ventilation air conditioning PG1 | Data sheet No. 13102 | Version 04-2020 Specications subject to change.
Oppermann Regelgeräte GmbH | Im Spitzhau 1 | 70771 Leinfelden-Echterdingen, Germany
Phone [phone] | Fax [phone] | [email protected] |www.oprg.de
CAD Viewer 3.2 evaluation - register at www.guthcad.com.au
50
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CAD Viewer 3.2 evaluation - register at www.guthcad.com.au
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Dimensioned drawings
specic case must be used for recurring maintenance.
German occupational safety regulations
(Betriebssicherheitsverordnung) mandate that the interval
must not exceed 3 years. As the manufacturer, we recommend a
maximum interval of 1 year. Maintenance includes: Verication
of function (operating states, such as setpoint); verication of
adjustment values/calibration (application of known test pres-
sure, alarm trigger test); when required, return to manufacturer
for recalibration or repair by manufacturer; completed work
must be documented. Only the manufacturer is authorized
to make repairs. The instructions regarding function / instal-
lation / electrical connection / startup must be observed in
this case. The operating entity must issue approval before the
device is dismantled / taken out of service.
Accessories
A/C kit type 6555, consisting of:
2 A/C duct connection tting - plastic type 6551
with screw fasteners and 2 m PVC hose ø 6 mm
A/C kit type 6550, consisting of:
2 A/C duct connection ttings - metal type 6552,
2 rubber bushings type 6553 and 2 m PVC hose ø 6 mm
see Data sheet No. 13101
Switching amplier EXL-IR-9170
(See Data sheet No. 14203)