New Cosmos Electric KD-12O Instruction Manual Download

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Diffusion Oxygen Detector

Model KD-12O

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-036-00

May 2010

New Cosmos Electric Co., Ltd.

Summary of Contents for KD-12O

Page 1: ...ughly read this instruction manual before using the equipment so it can be used safely and correctly z This manual provides information concerning standard specifications If the specifications of your model are nonstandard refer to the delivery specifications Instruction Manual No GAE 036 00 May 2010 New Cosmos Electric Co Ltd ...

Page 2: ...es 20 and 21 Wiring and Connecting Methods See pages 11 to 14 Ground terminals 24 V power supply Indicator E g External alarm Shield Display and Operation in Each Mode See page 17 Maintenance Check and Operation Methods See pages 18 to 25 Troubleshooting See page 26 ...

Page 3: ...7 Precautions before Use 14 7 1 Oxygen Deficiency 14 8 Display at Start up Initial Delay 15 9 Display and Operation in Each Mode 16 10 Trouble Alarm 17 11 Maintenance Check and Operation Method 18 11 1 Daily Inspection and Periodical Inspection 18 11 2 Replacement of Sensor Unit 19 11 3 Calibration Method 21 Maintenance Mode 21 Span Rough Adjustment 22 21 0 vol Adjustment 23 Full scale and Alarm S...

Page 4: ...arm lamp and alarm relays will operate making this Detector useful in monitoring oxygen concentrations 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 precautions in this manual DANGER Indicates ...

Page 5: ...applicable laws and regulations z Do not disassemble the product or modify the construction or electric circuits of the product Otherwise the explosion proof construction of the product may be adversely affected z Due to the presence of high concentrations of SO2 and Cl2 gases the sensor life may be reduced and the error margin may increase z Measurements performed when the atmospheric pressure of...

Page 6: ...vided for each order 3 The optional items are for use only by the KD 12 WARNING z Do not use the magnetic stick for any purposes other than the operation of this product z Keep in mind that when the magnetic stick attracts magnetic objects tools iron pieces etc your hands may become pinched and injured z Do not touch the magnet if you are allergic to metal otherwise your skin may become chapped or...

Page 7: ... alarm state red and trouble state yellow 6 Control block Insert the magnetic stick to control or set the product 7 Display block Displays the gas concentration and set values 8 Cable gland Used to secure the cable 9 Bolt with hexagon socket Used for securing the cable gland Use a hexagon wrench with a nominal diameter of 2 mm 10 Bolt with hexagon socket Used for securing the casing cover Use a he...

Page 8: ...ol of the product 3 UP switch Makes adjustments and settings or increases set values and other values 4 DOWN switch Decreases set values and other values Number Name Description 5 Display block Displays the concentration of gas 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 ...

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

Page 10: ...erature exceeds the operating temperature range 0 C to 40 C Places where condensation occurs Places where water is directly sprayed Places subject to corrosive gas Places close to equipment that generates high frequencies or a magnetic field z Install the gas detector in places free from vibration z Install the gas detector in places free from sudden temperature changes z Keep the gas detector fre...

Page 11: ...B 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 Detector must be opened to connect the wiring or replace the sensor unit When installing the gas detector provide sufficient space to enable the casing cover to be opened to at least 90 At least 90 センサ基板上から見たとき Mounting hole Mounting h...

Page 12: ... 5 2 Mounting of Optional Items Protective Cover Horizontal Type KW 41 Vertical Type KW 42 2B Pole Mounting Bracket CAUTION z Secure the casing cover with M3 screws if strong winds are expected M3 screw ...

Page 13: ... together If it is unavoidable however connect them or branch them within the explosion proof casing of the main unit Packing Washer Cable outer dia Inner dia Inner dia Clamp Accessory or Optional item 10 10 4 11 5 11 10 5 12 11 Optional item 11 12 12 C Clamp Accessory 11 5 12 5 12 Built in accessory 12 13 14 B Clamp Accessory 12 5 13 5 14 Accessory 13 14 14 A Clamp Optional item A pressure tight ...

Page 14: ...tor units and signal converters Use a dedicated cable such as CVV S with a thickness of 1 25 to 2 00 mm2 Make sure that the power supplied to the product is within the specified voltage range Make sure that the load resistance of the signal line including the resistance of the wire is 300 ohm or less WARNING z Before opening the casing cover of the gas detector be sure to turn off the product and ...

Page 15: ...n Example For details refer to the Instruction Manual of each device V2M KD 12O Indicator unit Detector GAS VISION S 500 Security management system Comprehensive gas detection alarm system KD 12O KD 12O KD 12O KD 12O Detector Single detector connected to indicator unit Multiple detectors monitored together 電源 2 Ground terminals CVVS cable 24V power supply Indicator Shield External alarm Ground ter...

Page 16: ...terminal 9 The lead wire will be automatically secured when the screwdriver is lifted 10 Check that the power supply cords are securely connected to the terminals This completes the power supply preparations 11 Wire the analog signal and external contact terminals if required 12 Tighten the hexagon socket bolts on the four corners of the main unit and close the casing cover of the main unit CAUTIO...

Page 17: ... detector is installed indoors open the doors and windows to let in fresh air z Measure the oxygen concentration with a portable oxygen indicator and enter the detection site only when the oxygen level is considered to be safe z Always enter the detection site after making sure that it has approximately the same oxygen concentration as the atmosphere If the concentration of oxygen is below 18 0 vo...

Page 18: ...Detector has been completed and the Detector will be in gas monitor mode MEMO The magnetic stick is not operable during the initial delay The initial delay lasts approximately 10 seconds after the power is turned ON If necessary turn ON the Detector for approximately 1 week and make the zero adjustment and span adjustment Refer to 11 3 Calibration Method for the adjustment procedures CAUTION z If ...

Page 19: ...oncentration Displayed alternately Test value Displayed alternately Analog signal 4 to 20 mA Fixed at 4 mA Value that is proportional to the gas concentration is output Test value is output Value that is proportional to the gas concentration 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 flashes Gre...

Page 20: ...sensor and sensor connector are inserted properly Yellow lamp flashes Under zero point The sensor is connected backward See if the sensor is connected backward The Detector may not have been surrounded with clean air during span adjustment After checking the environment around the Detector make the 21 0 vol adjustment again If the Detector still cannot be adjusted make the span rough adjustment La...

Page 21: ...ow to perform the alarm operation test refer to Test Mode on page 25 Once per month 21 0 vol confirmation Make sure that the displayed value in clean air is 21 0 vol If not perform the span adjustment For details about how to perform the span adjustment refer to 21 0 vol Adjustment on page 23 Periodical inspection Once per year Replace the Oxygen sensor unit Replace the oxygen sensor and then cali...

Page 22: ... the oxygen sensor package z The oxygen sensor has positive and negative polarity Be sure to check the polarity when replacing the sensor z When setting the oxygen sensor make sure that the sensor pins do not damage the sensor socket which may result in a loose connection z Make sure that no dirt or dust is trapped in the sintered wire mesh of the sensor casing and install the sensor only after cl...

Page 23: ...e pins of the oxygen sensor are straight with respect to the sockets of the sensor circuit board and then push in the sensor 5 Finally close the sensor casing cover See the photograph below on the right Make sure that no dirt or dust is trapped in the sintered wire mesh of the sensor casing and install the sensor after cleaning the wire mesh Reference Figures Oxygen sensor O2 As seen from the side...

Page 24: ...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 Content...

Page 25: ...ust the display to 21 0 vol 8 After adjusting the display on the Detector to a value close to the span gas concentration press the ENTER switch on the Detector 9 The span rough adjustment is completed when is displayed 10 On completion of the span rough adjustment the Detector will automatically return to gas monitor mode MEMO Precise adjustment is not performed by the span rough adjustment alone ...

Page 26: ...fter turning ON the power supply 4 Press the UP or DOWN switch on the Detector with the magnetic stick and adjust the value to 5 Press the ENTER switch on the Detector to start the operation 6 When the operation starts the following are displayed and the Detector is automatically adjusted to 21 0 vol Current displayed value 7 On completion of the span rough adjustment the Detector will automatical...

Page 27: ...N the power supply 3 Press the UP or DOWN switch on the Detector with the magnetic stick and adjust the value to 4 Press the ENTER switch on the Detector to start the operation 5 When the operation starts the following values are displayed and the user can check the full scale and alarm set values Full scale Alarm set value 6 After the full scale and alarm set values are displayed the Detector wil...

Page 28: ...ration of the Detector is possible in a concentration range from 0 0 vol to 27 5 vol if the full scale of the Detector is 25 vol 6 Press the UP or DOWN switch on the Detector and set the desired inspection concentration The test will start If the setting is outside the operating range or will be displayed 7 To end the test mode press the ENTER or MODE switch Text mode will be ended 8 If the ENTER ...

Page 29: ...urn the product to gas monitor mode P 21 Maintenance Mode The product is in maintenance mode Return the product to gas monitor mode P 21 Maintenance mode Incorrect wiring connection Check and reconnect the wiring P 12 Wiring and Connection There is no alarm contact output The alarm point setting is wrong Check the alarm setting P 24 Full scale and Alarm Set Display The analog signal does not chang...

Page 30: ...nalog signal is less than 300 ohm including the wiring resistance Gas alarm contact one stage only 1a no voltage contact output Non latching Rated load 0 5 A at 250 VAC or 0 5 A at 30 VDC resistance load Explosion proof performance Exd II BT5 Degree of protection IP65 interior Applicable cable Cable outer diameter 10 to 13 mm In the case of a 5 conductor cable for power supply gas concentration an...

Page 31: ...ds After examination of an allegedly defective product returned to New Cosmos with freight prepaid should the product fail to conform to this warranty the customer s only remedy and New Cosmos s only obligation shall be at New Cosmos s sole option replacement or repair of such non conforming product or refund of the original purchase price of the non conforming product In no event will New Cosmos ...

Page 32: ...he following reaction occurs when a load resistor is connected Noble metal electrode O2 2H2O 4e 4OH Base metal electrode 2Pb 2Pb 2 4e As a result a current proportional to the concentration of oxygen in the air flows from the noble metal electrode to the base metal electrode through an external circuit Since the current generated is dependent on temperature a Thermistor is used to compensate for t...

Page 33: ...es The ranges of temperature and humidity within which performance and functionality can be maintained during usage of the Detector Maintenance and inspections Work to guarantee that the equipment perform its required functions Calibration gas Gas used to calibrate scales of the equipment Hazardous area An area in a plant or facility with a hazardous atmosphere where explosive gases may mix with a...

Page 34: ...on 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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