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New Cosmos Electric KD-12O Instruction Manual

Diffusion oxygen detector
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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.
New Cosmos Electric Co., Ltd.
Instruction Manual No.
GAE-036-00
May 2010

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Summary of Contents for New Cosmos Electric KD-12O

  • Page 1 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. New Cosmos Electric Co., Ltd. Instruction Manual No. GAE-036-00 May 2010...
  • Page 2 • Nomenclature • Replacement of Sensor Unit See pages 4 to 6. See pages 20 and 21. • Wiring and Connecting • Display and Operation in Methods Each Mode See pages 11 to 14. See page 17.   24 V power supply Indicator...

  • Page 3: Table Of Contents

    Table of Contents 1. Introduction ........................1 2. Precautions........................2 3. Contents of Package ......................3 4. External Dimensions and Nomenclature................4 4-1. Main Unit ........................ 4 4-2. Display and Control Blocks..................5 4-3. Terminal Block ......................6 5. Installation......................... 7 5-1. ...

  • Page 4: Introduction

    • In order to ensure the correct and safe operation of this product, be sure to read this manual before use. • The KD-12O Diffusion Oxygen Detector detects oxygen leaks and oxygen deficiency in working environments of semiconductor manufacturing plants. It displays the oxygen concentration and also outputs an analog signal (4 to 20 mA DC) indicating the oxygen concentration to an external device.

  • Page 5: Precautions

    2. Precautions • Read this manual completely and be sure you understand the information provided herein before attempting to use the product. • Abide by all applicable laws and regulations when using this product. WARNING Be sure to ground the product to prevent electric shocks. If there is a gas leak alarm, take the necessary measures in accordance with your company's regulations.

  • Page 6: Contents Of Package

    3. Contents of Package • The product is provided with the following items. Make sure that none of these items is missing. • Although the product is packed and shipped with the utmost care, contact your New Cosmos representative if there should be any damage or missing items. Accessories Optional items Detector head...

  • Page 7: External Dimensions And Nomenclature

    4. External Dimensions and Nomenclature 4-1. Main Unit Two, 5.5 dia. Number Name Description Casing cover Casing Sensor unit Incorporates a gas sensor. ４ Ground terminal Used when grounding the frame. State display Indicates the power supply state (green), alarm state (red), and trouble indicator state (yellow).

  • Page 8: Display And Control Blocks

    4-2. Display and Control Blocks Magnetic switches (Insert the magnetic stick to operate the magnetic switches.) Number Name Description Makes adjustments and settings or cancels the operation of MODE switch the product. ENTER switch Enters settings or completes the control of the product. Makes adjustments and settings or increases set values and UP switch other values.

  • Page 9: Terminal Block

    4-3. Terminal Block Terminal block 24 V (+) 24V(+) POWER − 4 to 20 mA 4〜20mA Signal ＋ Ground terminal  Clamp  Lever  Sensor O-ring  connector  Number Name Description 24 V (+) Power supply voltage (positive) Power supply voltage (negative) and analog signal (negative) common Signal 4- to 20-mA analog signal (positive)

  • Page 10: Installation

    5. Installation 5-1.  Installation Method CAUTION Be careful not to damage the gas detector when installing it. Otherwise, the explosion-proof performance of the gas detector will be lost. When using the Detector to prevent oxygen deficiency (anoxia) in the surrounding air, mount the Detector at the same height as the head of the operator.
  • Page 11 • Mount the main unit to the wall with the M5 screws that are provided with the product. Be sure to install the protective cover (optional) when mounting the main unit outdoors. Mount the main unit with a 2B pole mounting bracket (optional) when mounting the main unit to a 2B pole.

  • Page 12: Mounting Of Optional Items

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

  • Page 13: Wiring Method

    6. Wiring Method 6-1. Wiring Work • Be sure to provide explosion-proof wiring if the product is to be used in hazardous places. CAUTION Licensed members should implement all necessary work for the product including wiring   and installation in accordance with all applicable laws, regulations and standard.

  • Page 14: Wiring And Connection

    6-2. Wiring and Connection WARNING Before 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.
  • Page 15 • If the main unit is grounded on the power supply side, do not connect a shielded cable to the ground terminal (E) in the gas detector, or otherwise two-point grounding will result. Connection Example with Power Supply Side Grounded KD-12O 電源 CVVS cable...
  • Page 16 Typical Connection Procedure (1) Prepare a power supply that can provide 24 V. (Do not turn on the power supply before wiring the main unit.) (2) Loosen the hexagon socket bolts on the four corners of the main unit using the provided hexagon wrench with a nominal diameter of 4 mm, and open the casing cover of the main unit.

  • Page 17: Precautions Before Use

    7. Precautions before Use CAUTION   Before turning ON any of the devices (e.g., indicator unit, signal converter) connected to the product, recheck that all of the connections are correct. Make sure that the gas detector and indicator unit or signal converter, in particular, are connected properly.   7-1. ...

  • Page 18: Display At Start-Up (Initial Delay)

    8. Display at Start-up (Initial Delay) CAUTION If the sensor output is not stable, the external contact point may operate after the initial delay. Release the interlock of the external equipment if necessary. During the initial delay, there is a fixed output of the analog signal corresponding to the standard oxygen concentration 21.0 vol%.

  • Page 19: Display And Operation In Each Mode

    9. Display and Operation in Each Mode In excess of alarm set value Maintenance mode At start-up Gas monitor Test mode Gas monitor (Initial delay) mode Test mode mode Green lamp Red lamp Red lamp lamp Green flashes flashes flashes Green flashes lamp is...

  • Page 20: Trouble Alarm

    10. Trouble Alarm • The product has a self-inspection function, and the trouble alarm will operate if a problem occurs. • The product will inform the user of the problem details with the display shown in the following table when the trouble alarm operates. •...

  • Page 21: Maintenance Check And Operation Method

    11. Maintenance Check and Operation Method 11-1. Daily Inspection and Periodical Inspection • Daily inspections are conducted by the user, while periodical inspections are conducted by your local representative. Frequency Checking item Contents of inspection ▪ The status of lamp (green POWER indicator) is lit.

  • Page 22: Replacement Of Sensor Unit

    11-2. Replacement of Sensor Unit         WARNING   Be sure to turn OFF the indicator unit or signal converter before replacing a sensor unit.   Otherwise, they may become a source of ignition.   Before turning ON the power supply to the Detector, make sure that the sensor and sensor connector are connected properly.
  • Page 23 Turn OFF the power supply to the Detector. Remove the sensor casing cover by rotating it in the direction of the arrow. (See the photograph below on the left.) Pull down the sensor to remove it. (See the photograph below on the right.) Connect the sensor.

  • Page 24: Calibration Method

    11-3. Calibration Method Maintenance Mode CAUTION While in maintenance mode, the external contact does not operate when the concentration of gas reaches or exceeds the alarm set value. The product in maintenance mode maintains the current status while the display shows [ This mode is canceled by repeating the same operation (1 to 4), turning the product OFF, or waiting 8 hours.

  • Page 25: Span Rough Adjustment

    Span Rough Adjustment   This adjustment mode is used after replacing the sensor or when adjustment cannot be performed with the 21.0 vol% adjustment.   CAUTION The external contact may operate during span rough adjustment.   Before performing span rough adjustment, set the product to maintenance mode or release the interlocks of the external devices if needed.

  • Page 26: Vol% Adjustment

    21.0 vol% Adjustment   ・This span adjustment mode is used in atmospheric air during periodic inspection.     WARNING   ▪ Always perform the 21.0 vol% adjustment in clean air. If you perform the 21.0 vol%   adjustment in a gas atmosphere, the value of oxygen concentration output will be displayed  ...

  • Page 27: Full-Scale And Alarm Set Value Display

    Full-scale and Alarm Set Value Display   ・The full-scale and alarm set values are only displayed. They cannot be changed.   While in gas monitor mode, press the MODE switch on the Detector first. Then press the UP switch with the magnetic stick within approximately 2 seconds. The Detector displays 【 ...

  • Page 28: Test Mode

      Test Mode ・Test values are adjusted and used for tests in this mode.     CAUTION   The external contacts may operate while the Detector is in test mode.      Before changing the Detector to test mode, set the Detector to maintenance mode as  ...

  • Page 29: Troubleshooting

    12. Troubleshooting • Before requesting repairs, refer to the following table. Consult your New Cosmos representative if the product does not return to normal after taking the corresponding remedies shown below or if the defective condition is not found in the table. •...

  • Page 30: Specifications

    13. Specifications Principle of Galvanic cell detection Sampling method Diffusion type Detection gas O2 (Oxygen) Detection range 0 to 25 vol% concentration Four-digit digital LED display display Alarm set value 18 vol% ±1.0 vol% of the displayed value Alarm accuracy 5 seconds or less to reach 18vol% by coming into contact with oxygen gas having a Alarm delay concentration of 10vol%.

  • Page 31: Warranty

    14. Warranty New Cosmos Electric Company Limited (New Cosmos) offers the following as the sole and exclusive limited warranty available to the customer. This warranty is in lieu of, and customer waives, all other warranties of any kind or nature, expressed or implied, including without limitation, any warranty for merchantability or fitness for a particular purpose.

  • Page 32: Detection Principle

    15. Detection Principle The galvanic cell sensor consists of noble metal (Pt, Ag) electrode, a base metal (Pb) electrode, and electrolyte. The noble metal electrode contacts the air through a Teflon membrane. Since a potential difference is produced between the two electrodes, the following reaction occurs when a load resistor is connected: O + 4e - 4OH -...

  • Page 33: Glossary

    16. Glossary Detector: A unit that detects gas concentration and converts it to electric signals. Diffusion type: A method to detect gas by utilizing convection and diffusion of gas. Explosion proof construction: A totally enclosed structure. When an explosive gas explodes in a container, the container can resist the pressure and prevent the ignition of explosive gases outside of it.
  • Page 34 Revisions GAE-036 May 2010 Additional copies of this Instruction 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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