Riken Keiki GD-D58-AC Operating Manual
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Riken Keiki GD-D58-AC Operating Manual

Combustible gas detector head
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PT2E-1747
Combustible Gas Detector Head
GD-D58・AC
GD-D58・DC
(TYPE GP)
(TYPE NC)
Operating Manual

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Summary of Contents for Riken Keiki GD-D58-AC

  • Page 1 PT2E-1747 Combustible Gas Detector Head GD-D58・AC GD-D58・DC (TYPE GP) (TYPE NC) Operating Manual...
  • Page 2 Operating Precautions This detector head is a gas detector that detects combustible 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. This detector head may be interfered by gases and vapors other than the gas to be detected.

  • Page 3: Table Of Contents

    <Contents> 1. Outline of the Product ......................4 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.

  • 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-type combustible gas detector head GD-D58 series. Please check that the model number of the product you purchased is included in the specifications on this manual. This manual explains how to use the detector head and its specifications.

  • 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.You can confirm instrument specification to see name plate as follows.

  • Page 6: Important Notices On Safety

     Do not attempt to repair the detector head by the user.  For the lid, use hexagon socket head bolts specified by RIKEN KEIKI.  The drive lid must be closed during use (except during maintenance).

  • Page 7: Warning Cases

    2 Important Notices on Safety 2-2. Warning cases 2-2. Warning cases WARNING Power supply Before turning on the detector head, always check that the voltage is properly applied. Do not use an unstable power supply because it may cause malfunctions. Need of grounding circuit Do not cut the grounding circuit or disconnect the wire from the grounding terminal.

  • Page 8: Precautions

    2 Important Notices on Safety 2-3. Precautions 2-3. Precautions CAUTION Do not use a transceiver or other equipment near the detector head. Radio wave from a transceiver near the detector head or its cables may disturb operations. If a transceiver is used, it must be used in a place where it disturbs nothing. To restart the detector head, wait for five seconds or more before doing it.

  • Page 9: Safety Information

    2 Important Notices on Safety 2-4. Safety Information 2-4. Safety Information Necessary information for explosion proof construction of Model GD-D58・AC／GD-D58・DC. This product is a diffusion type gas detector which is basically installing fixed place. <ATEX Specifications> Technical Data (Protection Method) Flameproof enclosure “d”...
  • Page 10 2 Important Notices on Safety 2-4. Safety Information <ITRI Specifications> Technical Data (Protection Method) Flameproof enclosure (Explosion-proof class) Ex d ⅡB+H2 T4 Gb X (Ambient Temperature) Type AC: -20C to 50C Type DC: -20C to 53C (Electrical Data) Supply voltage : Type AC: AC100～110V 50/60Hz 120mA Type DC: DC24V 360mA Electrical rating :...
  • Page 11 2 Important Notices on Safety 2-4. Safety Information <TIIS Specifications> Technical Data (Protection Method) Flameproof enclosure (Explosion-proof class) Ex d ⅡB+H2 T4 (Ambient Temperature) Type AC: -20C to 50C Type DC: -20C to 53C (Electrical Data) Supply voltage : Type AC: AC100～110V 50/60Hz 120mA Type DC: DC24V 360mA Electrical rating : DC3.0V 430mA or DC5.0V 200mA...

  • Page 12: Product Components

    3 Product Components 3-1. Main unit and standard accessories Product Components 3-1. Main unit and standard accessories <Main Unit> (including cable glands) Gas inlet Gas outlet 4-φ7 (for Display Cable connecting port Cable connecting port Unit: mm GD-D58 Series - 12 -...
  • Page 13 3 Product Components 3-1. Main unit and standard accessories <Standard Accessories>  Operating manual  Dedicated handling lever ......1 lever  Dedicated control key ......The control key quantity depends on the number of detector heads to be delivered. 1 - 10 units 1 key 11 - 20 units...

  • Page 14: Names And Functions For Each Part

    3 Product Components 3-2. Names and functions for each part 3-2. Names and functions for each part <Display> (6) Fault lamp (5) Power lamp (3) ▲ key (1) MENU/ESC key (7) Status display (4) ▼ key (2) SET/ALM key Used to enter the maintenance mode. MENU/ESC key * It is also used to cancel in a specific mode.
  • Page 15 3 Product Components 3-2. Names and functions for each part <Inside of the main unit> (Electric circuit section) (1) Terminal plate (5) Fuse (for power supply) (2) Terminal plate (for transmission) (3) Power switch (4) Grounding terminal * The figure above shows GD-D58·AC.
  • Page 16 The bolt with the hexagon socket must use the stainless steel material of property class "A2-70".  Grease specified by RIKEN KEIKI : BARRIERTA JFE 552 (manufactured by NOK KLUBER) If you can not prepare the specified grease, use one that meets the following requirements.

  • Page 17: Block Diagram

    3 Product Components 3-3. Block diagram 3-3. Block diagram <Electric Diagram> GD-D58·AC Power supply part Pump POWER INPUT (100 - 110 VAC) AC/DC converter POWER OUTPUT (24 VDC) Display (POWER) (FAULT) Seven-segment LED (four-digit) Controller (CPU) Magnetic operation part (MENU/ESC) (▲) (▼) (SET) Gas sensor Flow sensor GD-D58 Series...
  • Page 18 3 Product Components 3-3. Block diagram <Electric Diagram> GD-D58·DC Power supply part Pump POWER INPUT (24 VDC) Display (POWER) (FAULT) Seven-segment LED (four-digit) Controller (CPU) Magnetic operation part (MENU/ESC) (▲) (▼) (SET) Gas sensor Flow sensor GD-D58 Series - 18 -...

  • Page 19: How To Use

    4 How to Use 4-1. Before using the detector head How to Use 4-1. Before using the detector head Not only the first-time users but also the users who have already used the product must follow the operating precautions. Ignoring the precautions may damage the detector head, resulting in inaccurate gas detection. 4-2.

  • Page 20: Precautions For System Designing

    4 How to Use 4-3. Precautions for system designing Keep the detector head (and its cables) away from noise source devices. When selecting installation points, avoid a place where high-frequency/high-voltage devices exist. Do not install the detector head in a place where maintenance of the detector head cannot be performed or where handling the detector head involves dangers.
  • Page 21 4 How to Use 4-3. Precautions for system designing Introducing protective measures against lightning If cables are installed outside the factory/plant, or if internal cables are installed in the same duct as the cables coming from outside the factory/plant, "lightning" will cause problems. Because lightning acts as a large emission source while cables act as a receiving antenna, devices connected to the cables may be damaged.

  • Page 22: How To Install

     Tighten the hexagon socket head cap bolt fixing the lid and the main body with a tightening torque of 215.6 ±24.5N･cm.  When closing the lid of the detector, make sure that there is no dust on screw, surfaces of the main body and lid. Then apply grease as specified by RIKEN KEIKI. GD-D58 Series - 22 -...
  • Page 23 CAUTION Grease specified by RIKEN KEIKI : BARRIERTA JFE 552 (manufactured by NOK KLUBER) If you can not prepare the specified grease, use one that meets the following requirements. 1. Material does not harden due to deterioration 2.

  • Page 24: How To Wire

    4 How to Use 4-5. How to wire 4-5. How to wire WARNING  When installing the electric circuit lid, do not let any foreign substance such as metal get into the terminal box. This can cause a failure of the device or loss of explosion-proof performance. ...
  • Page 25 4 How to Use 4-5. How to wire ＜ITRI Specifications＞ Cable outer diameter Rubber seal inner diameter Washer inner diameter Eccentric washer (mm) (mm) (mm) inner diameter (mm) 9.0 -9.6 10 10 9.8 9.6 -11.0 11 14 11.8 11.0 -12.0 12 14 12.8...
  • Page 26 4 How to Use 4-5. How to wire <Figure of Terminal Plate> GD-D58·AC Pump power supply Detector head signal 100 - 110 input GD-D58·DC * The figure above shows GD-D58·AC. Pump power supply Detector head signal 24 VDC input NOTE ...
  • Page 27 4 How to Use 4-5. How to wire <Specifications of Terminal Plate> Specifications of terminal plate  Rated voltage: 250 VAC  Rated current: 12 A However, it depends on the cables to be used. Connection conditions  Cables: 0.25 - 2.5 mm ...
  • Page 28 4 How to Use 4-5. How to wire NOTE <How to Use the Dedicated Handling Lever> While holding down the lever, insert the Push the lever with your finger wire into the (round) wiring hole until it to lower the spring in its inside. reaches the deepest point.
  • Page 29 4 How to Use 4-5. How to wire <Attaching External Cable> As shown on the figure below, attach the parts in the following order: cable gland, eccentric washer, washer, and rubber seal to the cable, then connect the cable into the main unit, then screw the cable gland to tighten the rubber seal.When installing the cable gland, wipe the cable gland mounting part, the hexagon soket set screw, the grounding screw, and the cable gland and wipe the specified grease.
  • Page 30 4-5. How to wire CAUTION Grease specified by RIKEN KEIKI : BARRIERTA JFE 552 (manufactured by NOK KLUBER) If you can not prepare the specified grease, use one that meets the following requirements. 1. Material does not harden due to deterioration 2.
  • Page 31 4 How to Use 4-5. How to wire <Grounding> Connect the detector head to your grounding terminal with the external grounding terminal. WARNING  Before turning on the detector head, do not forget to connect it to a grounding terminal. ...

  • Page 32: How To Tube

     To remove dust, never fail to attach the supplied dust filter in the middle of the tube.  It is needed to decide the length and material of the tube. Please contact RIKEN KEIKI for more information.

  • Page 33: How To Operate

    5 How to Operate 5-1. Preparation for start-up How to Operate 5-1. Preparation for start-up Before supplying power, read and understand the following precautions. Ignoring these precautions may cause an electric shock or damage the detector head.  Check that the detector head is installed properly. ...

  • Page 34: How To Start The Detector Head

    5 How to Operate 5-3. How to start the detector head 5-3. How to start the detector head  Before supplying power to the detector head, check that the preparation for start-up is completed.  Open the electric circuit lid.* ...

  • Page 35: How To Detect

    5 How to Operate 5-4. How to detect 5-4. How to detect  Turn ON the power switch of the indicator/alarm unit. The gas detection is started after the initial clear* of the indicator/alarm unit.  Check that the operation is normal in accordance with the operating manual of the indicator/alarm unit. Make sure that the flow rate of the detector head is appropriate.

  • Page 36: Alarm Activation

    After the detector head is successfully returned from the fault, it restarts with the process normally performed right after it is turned on (initial clear). If the detector head has problems and is repeatedly malfunctioning, contact RIKEN KEIKI immediately. <Low Flow Rate Abnormal Operations>...

  • Page 37: Maintenance

    7 Maintenance 7-1. Maintenance intervals and items Maintenance The detector head is an important instrument for the purpose of safety. To maintain the performance of the detector head and improve the reliability of safety, perform a regular maintenance. Continuing to use the detector head without performing a maintenance will compromise the sensitivity of the gas sensor, thus resulting in inaccurate detection.
  • Page 38 Our qualified service engineers have expertise and knowledge on the dedicated tools used for services, along with other products. To maintain the safety operation of the detector head, please use our maintenance service.  The followings are typical maintenance services. For more information, please contact RIKEN KEIKI. Main services Power supply Checks the power supply voltage.

  • Page 39: Parts Replacement

    7-2. Parts replacement <Gas Sensor, Flow Sensor, and Pump Replacement> Our service engineers need to replace and calibrate these parts. Please contact RIKEN KEIKI. NOTE The gas calibration using the standard gas is required after the gas sensor is replaced. Adjustment is required after the flow sensor or pump is replaced.

  • Page 40: Storage, Relocation And Disposal

    8 Storage, Relocation and Disposal 8-1. Procedures to store the detector head or leave it for a long time Storage, Relocation and Disposal 8-1. Procedures to store the detector head or leave it for a long time The detector must be stored under the following environmental conditions. ...

  • Page 41: Troubleshooting

    This simply helps to find the causes of malfunctions which frequently occur. If the detector head 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 on Unit>...
  • Page 42 Disturbances by interference gases, such as solvents, cannot Presence of be eliminated completely. For information on actions such as interference gas removal of filter, please contact RIKEN KEIKI. Turn off and restart the detector head. A gas alarm is triggered Disturbance by noise...

  • Page 43: Product Specifications

    10 Product Specifications 10-1. List of specifications Product Specifications 10-1. List of specifications [GD-D58•DC(TYPE GP)/GD-D58•DC(TYPE NC)] ＜ATEX Specifications＞ Model GD-D58･DC Type TYPE GP TYPE NC Detection principle Catalytic combustion type New ceramic type Detection gas Combustible gas Display Seven-segment LED (four-digit) Detection method Sample-drawing Flow rate...
  • Page 44 10 Product Specifications 10-1. List of specifications [GD-D58•AC(TYPE GP)/GD-D58•AC(TYPE NC)] ＜ITRI Specifications＞ Model GD-D58･AC Type TYPE GP TYPE NC Detection principle Catalytic combustion type New ceramic type Detection gas Combustible gas Display Seven-segment LED (four-digit) Detection method Sample-drawing Flow rate 1.5 L/min or more (at maximum suction pressure of 5.3 kPa <gauge pressure>) Power display POWER lamp on (green)
  • Page 45 10 Product Specifications 10-1. List of specifications [GD-D58•DC(TYPE GP)/GD-D58•DC(TYPE NC)] ＜ITRI Specifications＞ Model GD-D58･DC Type TYPE GP TYPE NC Detection principle Catalytic combustion type New ceramic type Detection gas Combustible gas Display Seven-segment LED (four-digit) Detection method Sample-drawing Flow rate 1.0 L/min or more (at maximum suction pressure of 5.0 kPa <gauge pressure>) Power display POWER lamp on (green)
  • Page 46 10 Product Specifications 10-1. List of specifications [GD-D58•AC(TYPE GP)/GD-D58•AC(TYPE NC)] ＜TIIS Specifications＞ Model GD-D58･AC Type TYPE GP TYPE NC Detection principle Catalytic combustion type New ceramic type Detection principle Catalytic combustion type Detection gas Combustible gas Display Seven-segment LED (four-digit) Detection method Sample-drawing Flow rate...
  • Page 47 10 Product Specifications 10-1. List of specifications [GD-D58•DC(TYPE GP)/GD-D58•DC(TYPE NC)] ＜TIIS Specifications＞ Model GD-D58･AC Type TYPE GP TYPE NC Detection principle Catalytic combustion type New ceramic type Detection principle Catalytic combustion type Detection gas Combustible gas Detection method Sample-drawing Flow rate 1.0 L/min or more (at maximum suction pressure of 5.0 kPa <gauge pressure>) Power display POWER lamp on (green)

  • Page 48: Detection Principle

    10 Product Specifications 10-2. Detection principle 10-2. Detection principle [Catalytic Combustion Type] 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 49 10 Product Specifications 10-2. Detection principle [Flow Sensor] The flow sensor has a circuit that can output a contact signal when the flow rate drops below the preset level. The flow sensor is a hot-wire type with a Wheatstone bridge consisting of a detecting element, compensating element, and fixed resistance.

  • Page 50: Definition Of Terms

    11 Definition of Terms 10-2. Detection principle Definition of Terms Catalytic This is a principle of the sensor installed in the Type GP. combustion type See "10-2. Detection principle" for details. This is a principle of the sensor installed in the Type NC. New ceramic See "10-2.
  • Page 51 GD-D58 Series - 51 -...

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Gd-d58-dc

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