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Diffusion type Gas Detector

Model KD-12

Instruction Manual

Keep this instruction manual where it is readily accessible.

Thoroughly read this instruction manual before using the equipment so it can be used

safely and correctly.

This manual provides information concerning standard specifications. If the specifications

of your model are nonstandard, refer to the delivery specifications.

Instruction Manual No.

GAE-048-00

September 2013

New Cosmos Electric Co., Ltd.

Содержание KD-12

Страница 1: ...ly read this instruction manual before using the equipment so it can be used safely and correctly This manual provides information concerning standard specifications If the specifications of your model are nonstandard refer to the delivery specifications Instruction Manual No GAE 048 00 September 2013 New Cosmos Electric Co Ltd ...

Страница 2: ...es 29 and 30 Wiring and Connecting Methods See pages 11 to 15 Ground terminals 24 V power supply Indicator E g External alarm Shield Display and Operation in Each Mode See page 18 Maintenance Check and Operation Methods See pages 20 to 28 Troubleshooting See page 31 ...

Страница 3: ...ions before Use 16 In Case of Gas Leakage 16 8 Display at Start up Initial Delay 17 9 Display and Operation in Each Mode 18 10 Trouble Alarm 19 11 Maintenance Check and Operation Method 20 11 1 Daily Inspection and Periodical Inspection 20 11 2 Preparing Calibration Gas 21 11 3 Calibration Method 23 Maintenance Mode 23 Zero Adjustment 24 Span Rough Adjustment 26 Full scale and Alarm Set Value Disp...

Страница 4: ... ALARM indicator will flash and turn ON an external contact output thus helping to prevent disasters such as explosion accidents and fires Maintenance and inspection are indispensable to the reliable performance of the Gas Detection Alarm System Be sure to perform the maintenance checks described in this manual Explanation of Symbols The following symbols are used to indicate and classify precauti...

Страница 5: ...truction or electric circuits of the product Otherwise the explosion proof construction of the product may be adversely affected Do not install the product in places or near places where silicone sealant or gas is used Otherwise the performance of the product may be adversely affected Be sure to provide a protective cover optional if the product is installed outdoors Use the product in accordance ...

Страница 6: ...agnetic stick for any purposes other than the operation of this product Keep any magnets away from the equipment except MJ 1 magnetic stick Keep in mind that when the magnetic stick attracts magnetic objects tools iron pieces etc your hands may become pinched and injured Do not touch the magnet if you are allergic to metal otherwise your skin may become chapped or reddened Generally speaking magne...

Страница 7: ...set values 8 Cable entry PF3 4orG3 4 pitch 1 81mm Insertion length 10 86mm No of insertion threads 6 Certified cable glands 1 must be provided by end user and used 9 Hexagon socket head cap screw Used for securing the Casing cover Use a hexagon wrench with a nominal diameter of 4 mm 10 Hexagon socket set screw Used for securing the cable glands or sensor units Use a hexagon wrench with a nominal d...

Страница 8: ...control of the product 3 switch Makes adjustments and settings or increases set values and other values 4 switch Decreases set values and other values Number Name Description 5 Display block Displays the gas concentration and set values State display indicator Number Name Description 6 POWER indicator A green lamp to display the power supply state 7 ALARM indicator A red lamp to display the alarm ...

Страница 9: ...5 Number Name Description 1 24 V Power supply voltage positive 2 GND Power supply voltage and analog signal negative common 3 Signal 4 to 20 mA analog signal 4 ZA 5 ZC External contact Ground terminal Used to ground the frame Clamp Ground terminal Sensor connector O ring Lever ...

Страница 10: ...EX certified blanking elements Fastener type M5 x 16 shall have a yield stress factor of min 450 N mm2 The dimensions of flameproof joint between casing and casing cover of KD 12 flameproof housing are exceeding the minimum requirements stated EN IEC60079 1 Please contact the manufacturer for inspection repair and or adjustments of this flameproof Installation of cable gland and sensor Casing to c...

Страница 11: ... be lost Do not install the product in the following places Places where the ambient temperature exceeds the operating temperature range 10 C to 50 C Places where condensation occurs Places where water is directly sprayed Places subject to corrosive gas Places near to devices generating high frequency and magnetism Places where any hydrocarbon gases other than the target gas exist Install the gas ...

Страница 12: ... unit with a 2B pole mounting bracket optional when mounting the main unit to a 2B pole Refer to 5 3 Mounting of Options for details of optional products The casing cover of the gas detector needs be opened at the time of wiring Therefore when installing the gas detector provide sufficient space to enable the casing cover to be opened to at least 90 Mounting hole Mounting hole 90 or more ...

Страница 13: ...ample of Installation Position Partition wall Pipe Valve Detector Flange Example of Outdoor Installation Position Entrance Suction port Roof fan Exhaust port Entrances and windows Suction and exhaust ports Gas detector mounting position Places where gas easily accumulates Gas detector Side view Plan view ...

Страница 14: ...11 5 3 Mounting of Optional items Protective Cover Horizontal Type KW 41 Vertical Type KW 42 2B Pole Mounting Bracket CAUTION Secure the casing cover with M3 screws if strong winds are expected ...

Страница 15: ... which requires a three conductor cable without the external contact function make sure that the diameter of the cable conductor is 12 5 mm2 or 2 00 mm2 CAUTION All necessary work for the product including wiring and installation should be carried out by suitably trained personnel in accordance with applicable code of practice Inspection maintenance and repair of the equipment should be carried ou...

Страница 16: ...efore opening the casing cover of the gas detector be sure to turn off the product and all devices e g indicator unit and signal converter connected to the product If the power is turned ON the power supply may become a source of ignition Be sure to ground the product to prevent electric shocks Shall use a conductor which is at least M4 size by solderless for external earthing Shall place the stai...

Страница 17: ...ded System Configuration Example For details refer to the Instruction Manual of each device V2M KD 12 Indicator unit Detector GAS VISION S 500 Security management system Comprehensive gas detection alarm system KD 12 KD 12 KD 12 KD 12 Detector Single detector connected to indicator unit Multiple detectors monitored together KD 12R Ground terminals CVVS cable 24V power supply Indicator Shield Exter...

Страница 18: ...r supply to the GND terminal 7 The lead wire will be automatically secured when the screwdriver is lifted 8 Check that the power supply cords are securely connected to the terminals This completes the power supply preparations 9 Wire the analog signal and external contact terminals if required 10 Tighten the hexagon socket bolts tightening torque 0 8 2 4 N m on the four corners of the main unit an...

Страница 19: ...table gas detector and confirm the safety before entering the detection site DANGER Without panicking check that there is no fire around the product Do not touch any electric switches under any conditions Sparks from turning electric switches ON or OFF may cause ignition CAUTION Before turning ON any of the devices e g indicator unit signal converter connected to the product recheck that all of th...

Страница 20: ...ndicated condensation value may change rapidly during the initial delay but it is not a failure If the sensor unit has not been used energized for a long period after shipped from factory it may take some time for the sensor to stabilize When the sensor unit is turned on after a long unused period an alarm may be generated even when no gas exists Therefore deactivate the interlocks of the external...

Страница 21: ...et concentration A full scale test from 10 to 110 is possible Gas concentration Displayed alternately Test value Displayed alternately Analog signal 4 to 20 mA Fixed at 4 mA Gas concentration value is output Test value is output Gas concentration value is output Test value is output Contact operation Does not operate OFF Operates ON Operates ON Does not operate OFF Does not operate OFF Green lamp ...

Страница 22: ...ro error The sensor output is low Make the zero point adjustment with the gas doesn t lie between air around the equipment Lamp is OFF Zero point adjustment error There is gas in the ambient air After checking the ambient air make the zero adjustment again After checking the type and concentration of gas make a span adjustment again Lamp is OFF Span adjustment error The gas concentration applied f...

Страница 23: ...ion gas test gas and check the operation Refer to the manual of the calibration tool kit optional for a detailed check method Daily inspection At least once every 2 or 3 months Condition around gas detector Check that nothing interrupts the diffusion of gas around the gas detector Periodical inspection At least once a year Consult your local representative Use optional products to make actual gas ...

Страница 24: ...on Gas Calibration gas is used for actual gas inspection The following example shows how to prepare 2 00 vol 40 LEL Methane as a reference gas With a standard gas cylinder Standard gas cylinder Gas bag 2 00vol Methane air balance ...

Страница 25: ...ml syringe to a gasbag and draw 20 0ml of raw gas Draw a little more than you actually need then discharge the excess 3 Transferring raw gas into a quantitative pump Connect a syringe to the inlet of a quantitative pump then pull out the pump s piston Raw gas in the syringe is sucked into the pump Remove the syringe and pull the piston all the way out 100ml 4 Making diluted gas Connect an empty ga...

Страница 26: ... mode 6 Upon completion of this mode the product will automatically return to gas monitor mode 7 While is displayed the maintenance mode is being executed 8 This mode will be canceled by repeating the same operation 1 to 4 above turning the product OFF or waiting for 8 hours Carefully handle and make settings with the magnetic stick because the magnet is very powerful For details refer to 3 Conten...

Страница 27: ... followed by The product is ready to work but nothing has been operated 3 Press the UP or DOWN switch of the main unit with the magnetic stick and adjust the value to 4 Press the ENTER switch of the main unit 5 When the above items are displayed the zero adjustment is completed 6 Upon completion of the zero adjustment the product will automatically return to gas monitor mode If an error is display...

Страница 28: ...switch of the main unit with the magnetic stick and adjust the display of the main unit to the actual span gas concentration 14 Press the ENTER switch 15 The span fine tuning is completed when is displayed 16 Upon completion of the span fine tuning the product will automatically return to gas monitor mode 17 Remove the gasbag Perform span rough adjustment if or is displayed If an error is displaye...

Страница 29: ...djust the display of the main unit close to the actual span gas concentration 9 Press the ENTER switch 10 The span rough adjustment is completed when is displayed 11 On completion of the span rough adjustment the product will automatically return to gas monitor mode 12 Remove the gasbag Precise adjustment is not performed only by span rough adjustment Perform span fine tuning after span rough adju...

Страница 30: ...mple After zero adjustment will be displayed 3 Press the UP or DOWN switch of the main unit with the magnetic stick and adjust the value to 4 Press the ENTER switch of the main unit Full scale Alarm set value 5 When the above items are displayed in sequence and repeatedly the user can check the full scale and alarm set values 6 After the full scale and alarm set values are displayed the product wi...

Страница 31: ...f the full scale of the product is 2000 ppm The test operation of the product is possible in a concentration range from 10 LEL to 110 LEL if the full scale of the product is 100 LEL 6 Press the UP or DOWN switch of the main unit and set the desired calibration concentration Then the test will start If the setting is outside the operating range or will be displayed 7 To quit the test mode press the...

Страница 32: ...sions of flameproof joint between casing and casing cover of KD 12 flameproof housing are exceeding the minimum requirements stated EN IEC60079 1 Please contact the manufacturer for inspection repair and or adjustments of this flameproof CAUTION Only your local representative s maintenance service members or personnel who have completed a maintenance seminar can replace the sensor unit The externa...

Страница 33: ...the photo below 2 Rotate the sensor casing 3 Pull down the sensor 4 Insert the sensor to the main body while checking the positions of the pins and the holes 5 Install the sensor casing Make sure that that the mesh of the sensor casing is free of dirt or dust Clean the mesh before installing the casing 4 Insert the sensor 5 Install the sensor casing MEMO Return the used sensor unit to your local r...

Страница 34: ...tenance Mode The product is in maintenance mode Return the product to gas monitor mode P 23 Maintenance mode Incorrect wiring connection Check and reconnect the wiring P 12 15 Wiring and Connection There is no alarm contact output The alarm point setting is wrong Check the alarm setting P 27 Full scale and Alarm Set Display The analog signal does not change The product is in test mode Return the p...

Страница 35: ...voltage contact output Non latching Rated load 0 5 A at 250 VAC or 0 5 A at 30 VDC resistance load Explosion proof class Ex d IIB T5 Japan II 2 G Ex d IIC T5 Gb Europe Ex d IIC T5 Gb IECEx Approval EC type examination certificate DEMKO 08 ATEX 143870 X CE 0518 II 2 G Ex d IIC T5 Gb EMC EN61000 6 4 2001 EN50270 2006 Type 2 Performance testing The measuring function of the KD 12 gas detector for exp...

Страница 36: ... specifications are subject to change without notice If your specifications are nonstandard refer to the delivery specifications 14 Markings of explosion proof Nameplate detail Serial number label detail Rated label detail Certificate label detail Warning label detail List of hazardous locations standard EN 60079 0 2012 EN 60079 1 2007 IEC 60079 0 2011 IEC 60079 1 2007 Unit ...

Страница 37: ... any other special incidental or consequential damages or losses of any kind whatsoever including but not limited to loss of anticipated profits and any other loss caused by reason of non operation of the product This warranty is valid only if the product is maintained and used in accordance with New Cosmos s instructions and recommendations New Cosmos shall be released from all obligations under ...

Страница 38: ...in a container the container can resist the pressure and prevent the ignition of explosive gases outside of it Preset alarm value A preset value for the alarm to go off when gas concentration reaches a certain value Gas to be detected Gas that is detected and indicated which sets off an alarm Detection range Range of gas s concentration that can be indicated and set off an alarm Alarm accuracy Dif...

Страница 39: ... a fire An area where gas may be present Non hazardous area An area where electric equipment that has no potential to create a hazardous atmosphere Hazardous atmosphere Atmosphere within the explosive limit where explosive gas and air are mixed LEL Lower Explosive Limit The lowest concentration of flammable gas that will explode when mixed with air and ignited Quoted from gas detection terms and d...

Страница 40: ...uction Manual are available Contact the following address for ordering information Distributor Manufacturer New Cosmos Electric Co Ltd 2 5 4 Mitsuya naka Yodogawa ku Osaka 532 0036 Japan Phone 81 6 6309 1505 Fax 81 6 6308 0371 Email e info new cosmos co jp http www new cosmos co jp New Cosmos Electric Co Ltd ...

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