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Summary of Contents for Riken Keiki GD-A80 Series
- Page 1 PT2E-1856 Fixed Combustible Gas Detector Head GD-A80 Series GD-A80-70 Operating Manual...
- Page 2 Operating Precautions This detector is a gas detector that detects combustible or toxic gases in the air and triggers a gas alarm. The gas detector is a safety unit, not an analyzer or densitometer which performs quantitative/qualitative analysis/measurement for gases. Please fully understand the following points before using it, so that it can be used properly.
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Page 3: Table Of Contents
Contents 1 Outline of the Product 1-1. Preface ..............................4 1-2. Purpose of use ............................4 1-3. Definition of DANGER, WARNING, CAUTION and NOTE ..............4 1-4. Method of confirmation for Standards and Explosion proof specification ..........5 2 Important Notices on Safety 2-1. -
Page 4: Outline Of The Product
1 Outline of the Product 1-1. Preface Outline of the Product 1-1. Preface Thank you for choosing our fixed combustible gas detector head GD-A80-70. Please check that the model number of the product you purchased is included in the specifications on this manual. -
Page 5: Method Of Confirmation For Standards And Explosion Proof Specification
1 Outline of the Product 1-4. Method of confirmation for Standards and Explosion proof specification 1-4. Method of confirmation for Standards and Explosion proof specification This instrument has some specification depends on standard and explosion proof certificate. Please confirm the detector specification before using. Please refer Declaration of Conformity that is at the end of this manual if you have CE marking type. -
Page 6: Important Notices On Safety
Do not attempt to repair the detector. Do not open the lid when applying current. For the lid, use hexagon socket head bolts specified by RIKEN KEIKI. Do not repair the explosion-proof joint surface. If a scratch, crack or other abnormality is found on the container or explosion-proof structure joint surface, stop using the detector immediately and contact RIKEN KEIKI. -
Page 7: Precautions
2 Important Notices on Safety 2-3. Precautions 2-3. Precautions CAUTION Do not use a transceiver or other radio wave transmitting device near the detector. Radio wave from a transceiver, etc. near the detector or its cables may disturb operations. If a transceiver or other radio wave transmitting device is used, it must be used in a place where it disturbs nothing. -
Page 8: Safety Information
2 Important Notices on Safety 2-4. Safety Information 2-4. Safety Information Necessary information for explosion proof construction of Model GD-A80-70. This product is diffusion gas detector which is called type GD-A80-70, and used in connection with indication alarm. <ATEX/IECEx Specifications> Technical Data (Protection Method) Flameproof enclosure “d”... - Page 9 2 Important Notices on Safety 2-4. Safety Information <TIIS Specifications> Technical Data (Protection Method) Flameproof enclosure (Explosion-proof class) Ex d ⅡCT4 (Ambient Temperature) * -40℃ to +70℃ (Electrical Data) Electrical rating : DC3.0V 430mA or DC5.0V 200mA (Applicable Standard) JNIOSH-TR-NO.43(2008) *The ambient temperature range that can maintain explosion protection, and is not operating temperature range that ensures product performance.
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Page 10: Product Components
3 Product Components 3-1. Main unit and standard accessories Product Components 3-1. Main unit and standard accessories <Main Unit> (including a cable gland) [Front view] [Side view] Main unit Nameplate Guard Cover Hexagon socket head bolt (with drop-prevention mechanism) Sensor External Fixing grounding... - Page 11 3 Product Components 3-1. Main unit and standard accessories [Rear view] Cable connection terminal plate <Standard Accessories> Operating manual ･･････････････････ Fixing bracket ････････････････････ Rubber seal (ID ø12 mm)*1 ････････ Rubber seal (ID ø13 mm) ･･････････ Washer (ID ø12 mm)*1 ･･････････････ Internal grounding ...
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Page 12: How To Use
4 How to Use 4-1. Before using the detector How to Use 4-1. Before using the detector Not only the first-time users but also the users who have already used the detector must follow the operating precautions. Ignoring the precautions may damage the detector, resulting in inaccurate gas detection. The fixed combustible gas detector head GD-A80-70 is used in combination with an indicator/alarm unit that indicates a gas concentration and triggers an alarm. -
Page 13: Precautions For System Designing
4 How to Use 4-3. Precautions for system designing Do not install the detector in a place exposed to direct sunlight or sudden changes in the temperature. When selecting installation points, avoid a place where it is exposed to direct sunlight or radiant heat (infrared rays emitted from a high-temperature object), and where the temperature changes suddenly. - Page 14 4 How to Use 4-3. Precautions for system designing Take appropriate measures in accordance with the importance of the facilities and the environment. Provide protection by a lightning arrester (cable arrester). Protection against (Although inductive lightning surge can be transmitted through the cable, it is lightning prevented by installing a lightning arrester before the field devices and central processing equipment.
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Page 15: How To Install
4 How to Use 4-4. How to install 4-4. How to install <Installation Dimensions> Fixing bracket Unit: mm <Maintenance Space> Maintenance space Maintenance space Unit: mm The following installation requirements must be met to install the detector. Attach the detector to the wall or others using two M5 screws. CAUTION Do not install the detector in a place where maintenance of the detector cannot be performed or where handling the detector involves dangers. -
Page 16: Installation Procedure
WARNING If a scratch, crack or other abnormality is found on the container or explosion-proof structure joint surface, stop using the detector immediately and contact RIKEN KEIKI. CAUTION If it is difficult to tighten the cable gland, grease its screw part and then tighten it with the tool. - Page 17 M4 x 6 <Drip-proof Cover> Two optional drip-proof covers (round and square drip-proof covers) are available for the GD-A80 series. Select an appropriate cover for the installation environment ( installation direction etc.) . Use a square drip-proof cover for an inferior environment condition such as a place with a risk of water splash. Use a round drip-proof cover when the detector is used on a ship.
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Page 18: How To Wire
4 How to Use 4-6. How to wire 4-6. How to wire NOTE Before wiring, read also the operating manual of the indicator/alarm unit to be connected carefully. WARNING Do not put a metal object or other foreign substances inside the external connection terminal box when attaching the lid. - Page 19 4 How to Use 4-6. How to wire NOTE The following table shows an example of overall outer diameters of cables. Use them for reference. The overall outer diameters must be checked because they somewhat vary between manufacturers. Number of core EM CCE/F 1.
- Page 20 NOTE Hexagon socket head bolts with a grade of "A2-70" are used. Contact RIKEN KEIKI when the bolt is lost or replacement is necessary. WARNING Be sure to use the bolts supplied with the unit to attach the lid of the detector head.
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Page 21: How To Operate
5 How to Operate 5-1. Preparation for start-up How to Operate 5-1. Preparation for start-up Before connecting a power supply, read and understand the following precautions. Ignoring these precautions may cause an electric shock or damage the detector. Check that the detector is installed properly. ... -
Page 22: Maintenance
6 Maintenance 6-1. Maintenance intervals and items Maintenance The detector is an important instrument for the purpose of safety. To maintain the performance of the detector and improve the reliability of safety, perform a regular maintenance. Continuing to use the detector without performing maintenance will compromise the sensitivity of the gas sensor, thus resulting in inaccurate detection. - Page 23 To maintain the safety operation of the detector, please use our maintenance service. Typical maintenance services are listed as follows. For more information, please contact RIKEN KEIKI. Main Services Power supply Checks the power supply voltage.
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Page 24: Calibration Method
6 Maintenance 6-2. Calibration method 6-2. Calibration method Perform a calibration with the indicator/alarm unit (zero adjustment/span adjustment mode) using the calibration gas. Zero adjustment gas Calibration gas (collected in a gas sampling bag) Gas sampling bag for exhaust gas ≪GD-A80-70≫... - Page 25 Check that the model of replacement for the gas sensor agrees with the model shown on the sensor model label attached to the detector head. NOTE The span adjustment requires dedicated tools. We recommend the adjustment be performed by RIKEN KEIKI. - 25 -...
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Page 26: Replacement Parts
Cable inlet NOTE After the sensor is replaced, the voltage, zero and span adjustments must be performed. We recommend the sensor replacement be performed by RIKEN KEIKI. WARNING Do not replace the sensor while it is energized. Doing so may cause ignition, thus leading to dangers. - Page 27 The operation must be checked after replacement by our service engineer. For the stable operation of the detector and safety, ask our service engineer to take care of replacement of the part. Request RIKEN KEIKI for operation check. NOTE ...
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Page 28: Storage, Relocation And Disposal
When using a relocated or stopped/stored detector again, never fail to perform a calibration. For information on readjustment including a calibration, Please contact RIKEN KEIKI. 7-3. Disposal of products When the detector is disposed of, it must be treated properly as an industrial waste in accordance with the local regulations. -
Page 29: Troubleshooting
If the detector shows a symptom which is not explained in this manual, or still has malfunctions even though remedial actions are taken, please contact RIKEN KEIKI. <Abnormalities of Readings>... -
Page 30: Product Specifications
9 Product Specifications 9-1. Standard specifications Product Specifications 9-1. Standard specifications ＜ATEX/IECEx Specifications＞ Model GD-A80-70 Detection Catalytic combustion principle Mounted sensor HW-6212 HW-6239 Gas to be Combustible gas(methane excluded), Methane, Isobutane, H ydrogen detected Solvent vapor Detection method Natural diffusion type Transmission EM CCE/F (1.25 or 2.0 mm ), 4-core equivalent... - Page 31 9 Product Specifications 9-1. Standard specifications ＜TIIS Specifications＞ Model GD-A80-70 Detection Catalytic combustion principle Mounted sensor HW-6212 HW-6239 Gas to be Combustible gas(methane excluded), Methane, Isobutane, H ydrogen detected Solvent vapor Detection method Natural diffusion type Transmission EM CCE/F (1.25 or 2.0 mm ), 4-core equivalent cable Cable connecting...
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Page 32: Detection Principle
9 Product Specifications 9-2. Detection principle 9-2. Detection principle <Catalytic Combustion> When a combustible gas burns on the surface of an oxidation catalyst, the catalytic combustion type sensor considers resultant combustion heat as temperature and resistance changes in the platinum wire coil, and measures their gas concentrations. -
Page 33: Definition Of Terms
10 Definition of Terms Definition of Terms Catalytic This is a principle of the sensor installed in GD-A80-70. combustion type See "9-2. Detection principle" for details. Output from the detector head fluctuates for a while after turning on the power. Initial clear This is a function to prevent triggering alarm during that time.
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