Prosense BTN Series Bedienungsanleitung
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PROSENSE BTN Series Gas Detectors
Installation and User Manual
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WARNING!
This manual must be carefully read by all persons who have or will have the
responsibility for installing, using or servicing this product.
Like any equipment, this product will perform as designed only if installed, used
and serviced in accordance with the manufacturer’s instructions. Otherwise, it
could fail to perform as designed and persons who rely on this product for their
safety could suffer severe personal injury or death.
The warranties made by Prosense with respect to this product are voided if the
product is not installed, used and serviced in accordance with the instructions
in this user guide. Please protect yourself and other by following them.
Important Remark
The detector has been factory-tested before delivery, the commissioning after
installation must include the zero- and span-adjustment. The commissioning
has to be terminated by a function test of the complete gas detection system.
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CONTENTS
For Your Safety ........................................................................................................................................... 4
Strictly Follow The Instructions For Use............................................................................................. 4
Use in Areas Subject to Explosion Hazards ........................................................................................ 4
Liability For Proper Function or Damage............................................................................................ 4
Intended Use ...................................................................................................................................... 4
Introduction................................................................................................................................................ 6
Detector Body............................................................................................................................................. 6
Sensor Head................................................................................................................................................ 7
Installation.................................................................................................................................................. 7
Mounting The Detector.............................................................................................................................. 8
Cabling and Connections ............................................................................................................................ 9
BTN Series Detectors Connections........................................................................................................... 10
BTN Series Detectors Connections with RS485 Module .......................................................................... 12
System Status ........................................................................................................................................... 13
General Specification ............................................................................................................................... 15
Warranty Statement................................................................................................................................. 16
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For Your Safety
Ensure that this Operating Manual is read and understood BEFORE installing / operating /
maintaining the equipment. Pay particular attention to Warnings and Cautions. All document
Warnings are listed here and repeated where appropriate at the start of the relevant
chapter(s) of this Operating Manual. Cautions appear in the sections/sub-sections of the
document where they apply.
Strictly Follow The Instructions for Use
Any use of the detectors requires full understanding and strict observation of these
instructions. The detector is only to be used for purposes specified here.
Use In Areas Subject To Explosion Hazards
Equipment or components which are used in potentially explosive atmospheres and have
been tested and approved according to International or European regulations may be used
only under the conditions specified here. Modifications of components or the use of faulty or
incomplete parts are not permitted. In case of repairs of equipment or components, the
national regulations must be observed.
Liability For Proper Function Or Damage
The liability for the proper function of the detector is irrevocably transferred to the owner
or operator to the extent that the detector is serviced or repaired by personnel not employed
or authorized by Prosense or if the sensing head is used in a manner not conforming to its
intended use. Prosense cannot be held responsible for damage caused by non-compliance
with the recommendations given above. The warranty and liability provisions of the terms of
sale and delivery of Prosense are likewise not modified by the recommendations given above.
Intended Use
The BTN series detectors are intended to be used for stationary, continuous monitoring for
combustible gas/air or vapour/air mixtures below the Lower Explosion Limit (LEL) resp. below
10 % of the LEL under atmospheric conditions. BTN Series detectors are suitable to use in safe
areas.
Not to be used in oxygen enriched atmospheres
In conjunction with the central controllers Prosense detectors with preadjusted
alarm thresholds audible and visible alarm devices or automatic countermeasures
can be activated before the detected gases or vapours can form dangerous
flammable mixtures with air.
Please be alerted in following special conditions may have impact on measuring function due
to the nature of measuring method:
1. Very High Gas Concentrations
Catalytic and Pellistor sensors used to dedect flammable and toxic gases. The measuring
method based on heat produced by reaction on the catalytic oxidation of a flammable gas. In
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case of high gas concentrations there is not enough oxygen in the sensor to perform oxidation
process correctly. Hence the measuring signal decreases at high gas concentrations and even
can lead to measuring signal within the measuring range again. A connected controller must
be operated with alarm devices, outputs, and alarm thresholds operating as latched if the
measuring range is exceeded. In this case do not reset latching alarms without having ensured
a safe condition by means of an independent gas concentrations measurement.
2. Minimum Oxygen Concentration
The measuring principle of heat of reaction needs a minimum oxygen concentration of 12 %
by vol., otherwise the measuring values will be too low because of oxygen deficiency.
3. Long-term Gassing With Methane At Very Low Temperatures
If the Prosense BTN series detectors are operated applying with methane at very low
temperatures, the measuring signal at longterm exposition may decrease after alarm
activation and may lead to misinterpretation.
If a gas alarm occurs, necessary actions need to be taken immediately. The decrease of the
measuring signal should not mean that the gas concentration has been decreased. We
recommend to keep alarms on the associated controllers and not to reset these alarms
without performing measurement with an independent gaz detectors to make sure conditions
are safe.
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Introduction
The Prosense comprises a gas detector body and a choice of sensors heads for detecting
flammable gas, toxic gas and oxygen. The construction of Prosense allows it to be used in
non-hazardous safe area locations.
Prosense detectors can be configured with a wide range of different sensors may be used to
detect a broader range of target gases. The detector provides three programmable relays
which are FAULT, ALARM1 and ALARM2 for controlling external equipment e.g. alarms,
sirens, valves or switches. The detector can be configured to communicate RS485 modbus
protocal with an optional module and also provides FAULT and ALARM1 relay outputs at
same time.
Detector Body
Prosense BTN series detectors comprises of the main parts as shown below:
Diagram 1: Exploded view
The detector enclosure has four threaded entries. The three cable entries either side of the
upper part of the transmitter housing are for connecting the power source, signal output and
relay contacts to associated signalling equipment. The bottom entry allows direct connection
of the sensor socket. The body has integrated mounting screw locations on housing.
Sensor Head
Dedector body
Body Cover
Cable entries
Sensor entry
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Diagram 2: Detector Body and Sensor Head Size
Sensor Head
The Prosense BTN series sensor head designed to dedect flammable and toxic gases. Sensor
head may include electrocatalytic technologies or a wide range of toxic gas sensors based on
electrochemical cell (ECC) technology.
Installation
Gas detectors should be mounted where a potential hazard of gas is most likely to be present.
The following points should be noted when locating gas sensors.
•When locating detectors consider the possible damage caused by natural events e.g.
rain or flooding.
•Consider ease of access to the gas detector for functional testing and servicing.
•Consider how escaping gas may behave due to natural or forced air currents.
Note: The placement of gas detectors should be determined following the advice of experts
having specialist knowledge of gas dispersion, experts having knowledge of the process plant
system and equipment involved, safety and engineering personnel. The agreement reached
on the location of detectors should be recorded.
Each gas has different nature depending on their density. The density of which is lower than
air, such as hydrogen, methane or ammonia the sensor head must be located above a possible
leak or at the highest points at which major concentrations of gas may be found. The gases
and vapours with a density greater than air, the sensor head must be installed beneath a
possible leak or at the lowest points at which such gases and vapours may be present. The
density of which is higher than air the sensor head must be located where gas accumulate.
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Mounting The Detector
The detector should be mounted vertically as the sensor head pointing downwards. Detector
has to be mounted such that the sensor's gas entrance area.
The install location
•should be isolated from vibration, direct sun light and have temperature stability
•avoided external influences such as splashing water, oil, corrosive aerosols
•should have at least 30 cm free space beneath the sensor head to provide accessibility
for calibration work.
•should be in air flow between possible leak or collection point and possible source of
ignition.
Prosense do not recommend to install detectors to :
•directly above a cooking unit,
•directly above a sink unit,
•close to an extractor unit,
•outdoor without protection against the rain,
•in places where temperature is outside the admissible operating range,
•in corrosive environments,
•inside air vents.
•in environments where silicon can be found.
The Prosense detector has an integrated mounting screw holes on the body. The correct
mounting position is given in Diagram 3:
Diagram 3: Mounting holes on body
Mounting hole
Mounting hole
Mounting hole
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Cabling and Connections
Caution: All electrical connections should be made in accordance with any relevant local or
national legislation, standards or codes of practice.
Prosense BTN series detectors can operate between 12 - 24 VDC. The connection socket
located on main board. User should consider the cable lenght when performing installation in
the field. The Prosense detector requires a power supply between 12VDC and 24VDC. Make
sure that a minimum 12 VDC supply available at the detector entrance and consider the
voltage drop due to cable resistance in case of long distance applications.
The use of industrial grade, suitably shielded field cable is recommended. The best practices
shown that, screened 4 cores (plus screen 90% coverage), suitably mechanically protected
copper cable with a suitable explosion-proof gland, or ¾” NPT steel conduit, depending on the
distance between signal received or control panel and detector. It is recommended to use 1.5
mm2 (16 AWG) cable.
V+, V-(GND) ports must be connected via using two-wire cable to supply 16VDC power to
detector. If detector has RS485 communication module additional two wire cable should be
used to connect A and B to read the output signal of detector from A and B ports. Connections
should be made correctly with extra care to do not mix ports and not cause any damage on
the detectors. Detector power connection should be done with 1.5mm2 cross section cable.
The total distance between control panel and detectors should not exceed 1km.
The wiring for detectors utilized with RS485 board should be done by using connection cable
EIA RS485 2 core wires with section 0.22 / 0.35 mm2 and shielded. Nominal capacity between
the wires < 50pF/m and nominal impedance 120 Ohms.
In case RS485 communciation module used on detectors to monitor through DP32 control
panel, the V+, V- ports and A,B ports are located on different socket in both DP32 control
panel and detector side. The connections should be done with care to do not mix power and
RS485 ports. All detectors will be connected through one cable via hopping one detector to
another till the last detector on the line.
There should be one master device and up to 32 slave devices in RS485 communication. The
master is DP32 control panel and detectors will be the slave devices:
Diagram 4: RS485 communication
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Diagram 5: Panel to detector connections
Each detector connected to DP32 panel should have unique address. Detectors having same
address would not be recognised by control panel. DP32 panel can communicate up to 32
detectors. In case less then 32 detectors connected, control panel would not show non-
existent detectors. Unused detectors should be deactivated on channel settings menu steps.
Important: The last detector at the communication line should have line termination resistor
(120 Ohm) to enable communication for all detectors on the line. The resistor is not
implemented on the board and user should connect it physically during the installation.
BTN Series Detectors Connections
BTN Series detectors has a power input and three relay output sockets on main board.
Diagram 6: BTN Series detector main board
Sensor connections are not used for external connections and should not be changed in any
case. BTN Series detectors has three integrated relays on main board which are named as
Detector 1
Detector 2
A
B
V-
V+
DP32
Panel
Max 32
Detector
V+ V-B A
V+ V-B A
A
B
V-
V+
V-
V+
ALARM1
FAULT
Sensor connection
Address and alarm level
adjustment switches
ALARM2
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