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PRS-UM-BTN-EN-Rev02-02.2019 

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 

Summary of Contents for BTN Series

Page 1: ...1 PRS UM BTN EN Rev02 02 2019 PROSENSE BTN Series Gas Detectors Installation and User Manual ...

Page 2: ...nd 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...

Page 3: ...on 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 ...

Page 4: ...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 likew...

Page 5: ... 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 activ...

Page 6: ...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...

Page 7: ...e 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 the...

Page 8: ...ibility 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 i...

Page 9: ... 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 ...

Page 10: ...ermination 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 connecti...

Page 11: ...ent switches Alarm levels and related switch positions are given in table 3 Switch 6 Switch 7 Alarm1 Alarm2 OFF OFF 10 15 OFF ON 10 20 ON OFF 30 40 ON ON 40 60 Table 1 BTN Series detector alarm levels Oxygen Detectors For oxygen detectors the output values and meanings are different as oxygen is naturally available in atmosphere Alarm 1 is used to raise low level alarm and Alarm2 is used to raise ...

Page 12: ...the installation between RS485A and RS485B ports BTN series detector main board has a dip switch to assign address to the detector Each detector must have unique address to communicate to DP32 Panel Detectors having same address would not be recognised by the panel The address should be set via using first 5 switches on the dip switch Diagram 9 BTN Series detector address switches Detectors will b...

Page 13: ...inue blinking This status means that detector is ready to normal operation First time switch on Commissioning WARNING The following procedure requires the detector cover to be removed while carrying out supply voltage checks Therefore the appropriate permits to work should be sought in preparation Prior to carrying out any HOT WORK ensure local and site procedures are followed Ensure that the asso...

Page 14: ...ired accuracy can be attained To calibrate the detector use an appropriate span gas cylinder constant flow regulator and Prosense Gas Cap The flow rate used for calibration gas is 0 5 L Min Important Any optional board is installed on detector should be removed prior the calibration as some of the features masked or unavailable with them when installed Zero Calibration It is recommended to use a c...

Page 15: ...x screw terminals suitable for wire diameter 1 5mm2 to 2 5mm2 Relays 3 x 1A 30VDC 0 5A 125VAC 0 3A 80VDC Non selectable normally open and de energized Communication RS485 Modbus RTU Sensor Catalytic Table 2 BTN Series detectors electrical specifications Detector Body Specifications Material Plastic black Weight Plastic buat 230g with Sensor Header Mounting Wall mounting Entries PG11 Table 3 Detect...

Page 16: ... fault is not found with he the equipment Prosense Technology shall not be liable for any loss or damage whatsoever or howsoever occasioned which may be a direct or indirect result of the use or operation of the Contract Goods by the Buyer or any Party This warranty covers instrument and parts sold to the Buyer only by authorized distributors dealers and representatives as appointed by Prosense Te...

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