Riken Keiki GD-84D-EX Series Operating Manual
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Riken Keiki GD-84D-EX Series Operating Manual

Gas detector head
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PT2E-3040
Gas Detector Head
GD-84D-EX Series
GD-84D-EX-EC
GD-84D-EX
GD-84D-EX-ET-EC
GD-84D-EX-ET
GD-84D-EX-EA-EC
GD-84D-EX-EA
Operating Manual

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Summary of Contents for Riken Keiki GD-84D-EX Series

  • Page 1 PT2E-3040 Gas Detector Head GD-84D-EX Series GD-84D-EX-EC GD-84D-EX GD-84D-EX-ET-EC GD-84D-EX-ET GD-84D-EX-EA-EC GD-84D-EX-EA Operating Manual...

  • Page 2: Table Of Contents

    INDEX INDEX Product Overview ............................6 1-1 Introduction ............................6 1-2 Product intended use and features ...................... 7 1-2-1 Communication systems by model and corresponding sensors ..........7 1-2-2 Product features ........................7 1-3 DANGER, WARNING, and NOTE ....................... 8 1-4 Checking CE/UKCA marking .......................
  • Page 3 INDEX 5-6-3 Checking the version of the main unit (84D VER)..............60 5-6-4 Checking the sensor versions (SEN VER) ................61 5-6-5 Checking the communication PCB version (NET VER) ........ 61 5-7 Shutting down ............................ 62 Alarm Activation ............................63 6-1 Gas (oxygen) alarm pattern .......................
  • Page 4 INDEX 4-20mA 7-10-5 Settings for external output during alarm tests (TEST4-20) ..114 4-20mA 7-10-6 Energized/de-energized setting (RLY PTRN) ........ 115 7-10-7 Alarm type setting (ALM TYPE) ..................118 7-10-8 Alarm pattern setting (ALM PTRN) ..................120 7-10-9 Alarm value limiter setting (AL LIMIT) ................121 7-10-10 Fault pattern setting (FLT PTRN) ..................
  • Page 5 INDEX 11-2 Sensor specifications ........................177 11-2-1 Electrochemical type ......................177 11-2-2 New ceramic type ....................... 178 11-2-3 Semiconductor type ......................179 11-2-4 Hot-wire semiconductor type ....................181 Appendix ..............................183 12-1 Detection principle ......................... 183 12-1-1 Electrochemical type ......................183 12-1-2 New ceramic type .......................

  • Page 6: Product Overview

    The contents of this manual are subject to change without notice to allow product improvements. Any duplication or reproduction of this manual without permission is prohibited, whether in whole or in part. Riken Keiki accepts no liability for accidents or damage resulting from use of the product, whether within or outside the warranty period.

  • Page 7: Product Intended Use And Features

    1. Product Overview 1-2 Product intended use and features 1-2 Product intended use and features This product is a fixed multi-gas detector head that detects leaks of various gases used in semiconductor factories and similar locations. It detects combustible gases and toxic gases in the surrounding atmosphere and activates alarms if preset concentrations are exceeded.

  • Page 8: Danger, Warning, And Note

    1. Product Overview 1-3 DANGER, WARNING, and NOTE 1-3 DANGER, WARNING, and NOTE This operating manual uses the following categories to indicate potential damage/hazards if the user disregards the information provided and uses the product incorrectly: This indicates situations in which improper handling may result in fatal or DANGER serious injury or significant property damage.

  • Page 9: Important Safety Information

    2. Important Safety Information 2-1 Danger information Important Safety Information 2-1 Danger information DANGER  The product is a non-explosion-proof device. Never attempt to use the product to detect gases above the lower explosive limit (LEL). 2-2 Warning information WARNING Power source ...

  • Page 10: Caution Information

    2. Important Safety Information 2-3 Caution information Operating in an environment with gases  Do not operate this product in locations where combustible or explosive gases or vapor are present. Operating this product in such environments is extremely hazardous. Action when a gas alarm occurs ...

  • Page 11: Product Configuration

    3. Product Configuration 3-1 Main unit and accessories Product Configuration 3-1 Main unit and accessories Open the box and packaging and inspect the main unit and accessories. If any accessories are missing, contact our sales department. <ET models> Standard accessories Protective rubber Main unit Dust filter...
  • Page 12 3. Product Configuration 3-1 Main unit and accessories <4 - 20 mA models, EA models> Standard accessories Protective Main unit rubber Dust filter Terminal unit caps Operating manual (1) *1 These caps protect the GAS IN and GAS OUT ports. Remove them when the product is in use. *2 One dust filter is supplied.

  • Page 13: Part Names And Functions

    3. Product Configuration 3-2 Part names and functions 3-2 Part names and functions 3-2-1 Main unit part names and functions <Front of main unit> ① ② ③ ④ Name Function ① This is the cooling fan. GD-84D-EX-EC, GD-84D-EX-ET-EC, and GD-84D-EX-EA-EC lack fans.
  • Page 14 3. Product Configuration 3-2 Part names and functions <Underside of main unit> <4 - 20 mA models> <ET models> <EA models> ① ② ④ ⑤ ① ② ③ ④ ⑤ ① ② ③ ④ ⑤ Name Function GAS IN This is the sampling pipe opening on the IN side. ①...

  • Page 15: Front Panel And Lcd Screen Part Names And Functions

    3. Product Configuration 3-2 Part names and functions 3-2-2 Front panel and LCD screen part names and functions ⑩ ⑪ ⑫ ⑬ ① ② ③ ④ ⑤ ⑭ ⑥ ⑮ ⑦ ⑧ ⑨ ⑯ ⑱ GD-84D-EX ⑰ Name Function Power LED (POWER) This is the power LED.
  • Page 16 3. Product Configuration 3-2 Part names and functions Second alarm setpoint This indicates in points the second alarm setpoint as a ratio of the full ⑭ display scale. First alarm setpoint This indicates in points the first alarm setpoint as a ratio of the full scale. ⑮...

  • Page 17: Block Diagram

    3. Product Configuration 3-3 Block diagram 3-3 Block diagram 3-3-1 Electrical circuit diagram Refer to the product electrical circuit diagram provided below. <4 - 20 mA models> Display (LCD) Power supply section ・ 24 V DC Display (LED) ・ POWER ・...
  • Page 18 3. Product Configuration 3-3 Block diagram <ET models> Power supply section Display (LCD) ・ PoE+ Display (LED) ・ POWER Power source voltage ・ ALM1 conversion section ・ ALM2 ・ FAULT Transmitter Control unit Button panel ・ Ethernet ・ MODE ・ TEST/SET ・...
  • Page 19 3. Product Configuration 3-3 Block diagram <EA models> Display (LCD) Power supply section ・ 24 V DC Display (LED) ・ PoE+ ・ POWER ・ ALM1 ・ ALM2 Power source voltage conversion section ・ FAULT Button panel Transmitter ・ MODE ・ Ethernet ・...

  • Page 20: Piping Diagram

    3. Product Configuration 3-3 Block diagram 3-3-2 Piping diagram Refer to the product piping circuit diagram provided below. Flow monitor Flow Sensor Sensor Pump Flow automatic adjustment 20 / 191...

  • Page 21: Installation

    4. Installation 4-1 Installation precautions Installation 4-1 Installation precautions Be sure to observe the following precautions when performing installation tasks. Failure to observe these precautions may result in product failure and/or inability to detect gas correctly. CAUTION  The product is a precision device. The expected performance of this product may be affected by the location (environment) in which it is installed.

  • Page 22: System Design Precautions

    4. Installation 4-2 System design precautions <Do not install in improperly grounded systems> When installing within a system chassis, make sure the system is properly grounded to Class D or equivalent. <Do not install in the presence of interference gases> Do not install the product in locations where miscellaneous gases are present.
  • Page 23 4. Installation 4-2 System design precautions Lightning strikes may damage devices connected to the cable. Additionally, note that inductive lightning surges due to lightning strikes cannot be entirely prevented, even if cables are installed in metal ducts or buried underground. While it is not possible to completely protect against disasters caused by lightning, the following protective measures are available: <Protection against lightning>...
  • Page 24 4. Installation 4-2 System design precautions When operating a load, stabilize the operation of this product, then take the following measures, where appropriate, to protect the alarm contacts.  Link the circuits (contact amplification) using an external relay (not exceeding 24 V DC). Add a surge absorber (SK1) appropriate for the rating to the external relay.

  • Page 25: Providing Maintenance Space

    4. Installation 4-3 Providing maintenance space 4-3 Providing maintenance space When installing the product, make sure there is space for maintenance. 4-3-1 Maintenance space <When installing one unit of this product> (Unit: mm) <When installing this product in series> <When not using the mounting plate for compatibility with the GD-70D> Maintenance space Maintenance space Maintenance space...
  • Page 26 4. Installation 4-3 Providing maintenance space <When using the mounting plate for compatibility with the GD-70D> • When GD-70D is installed at a pitch of 5 mm Fixed at 2 points either inside or outside Maintenance space Maintenance space Maintenance space Use of mounting plate Use of mounting plate Use of mounting plate...

  • Page 27: Maintenance Space 4-20Ma Ea

    4. Installation 4-3 Providing maintenance space CAUTION  We recommend installing at a minimum pitch of 10 mm. Make this a minimum of 10 mm. If a wall is located either to the left or right end of the installed series of devices, leave 10 mm or more between the wall and the left or right end of the installed devices.
  • Page 28 4. Installation 4-3 Providing maintenance space <When using the mounting plate for compatibility with the GD-70D> • When GD-70D is installed at a pitch of 5 mm Fixed at 2 points either inside or outside Maintenance space Maintenance space Maintenance space Use of mounting plate Use of mounting plate Use of mounting plate...

  • Page 29: Installing The Main Unit

    4. Installation 4-4 Installing the main unit CAUTION  We recommend installing at a minimum pitch of 10 mm. Make this a minimum of 10 mm. If a wall is located either to the left or right end of the installed series of devices, leave 10 mm or more between the wall and the left or right end of the installed devices.

  • Page 30: Installing The Main Unit (Without The Mounting Plate For Compatibility With The Gd-70D)

    4. Installation 4-4 Installing the main unit 4-4-1 Installing the main unit (without the mounting plate for compatibility with the GD-70D) CAUTION  Before installing this product, remove the protective rubber caps fitted to GAS IN and GAS OUT. If the product is installed with the rubber caps still attached, excess loads will be imposed on the pumps and sensors when the power is turned ON.
  • Page 31 4. Installation 4-4 Installing the main unit <4 - 20 mA models, EA models> Place the terminal unit against the installation surface and secure with four screws. Mount the main unit to the terminal unit. Pull the projection on the top of the main unit towards Projection on you to open the front cover.
  • Page 32 4. Installation 4-4 Installing the main unit Use four screws to secure the main unit to the terminal unit. Close the front cover on the main unit. Close the front cover firmly so that it clicks back into place. 32 / 191...

  • Page 33: Installing The Main Unit (Using The Mounting Plate For Compatibility With The Gd-70D)

    4. Installation 4-4 Installing the main unit 4-4-2 Installing the main unit (using the mounting plate for compatibility with the GD-70D) CAUTION  Install so that there is no gap between the mounting plate for compatibility with the GD-70D and the surface on which it is installed.
  • Page 34 4. Installation 4-4 Installing the main unit Mount the main unit on the mounting plate for compatibility with the GD-70D. Pull the projection on the top of the main unit Projection on towards you to open the front cover. the top The front cover opens to approximately 120°.
  • Page 35 4. Installation 4-4 Installing the main unit <4 - 20 mA models, EA models> Use four double SEMS screws (M4/M5) <Securing with four double SEMS screws> to secure the mounting plate to the installation surface (for compatibility with the GD-70D). You can also use three double SEMS screws (M4/M5) when using the mounting plate for compatibility with the...
  • Page 36 4. Installation 4-4 Installing the main unit Mount the main unit to the terminal unit. Pull the projection on the top of the main unit towards Projection on you to open the front cover. the top The front cover opens to approximately 120°. Push further down to open to 180°.

  • Page 37: Fitting Sensors

    4. Installation 4-5 Fitting sensors 4-5 Fitting sensors 4-5-1 Configuration of the main unit Fan unit Pump unit Flow sensor unit Sensor Chamber unit CAUTION  Each unit is composed of precision components. In particular, be careful to avoid dropping the sensors when removing them.
  • Page 38 Sensor storage requires setting aside a storage compartment specifically for the sensors, including facilities for supplying power. As a rule, avoid handling or storing the sensors after removing them from the product. Contact Riken Keiki to handle sensor disposal. ...

  • Page 39: Fitting Sensors

    4. Installation 4-5 Fitting sensors 4-5-2 Fitting sensors Pull the projection on the top of the main unit towards you to open the front cover. The front cover opens to approximately 120°. Push further down to open to 180°. Loosen the four white knurled screws on the chamber unit.
  • Page 40 4. Installation 4-5 Fitting sensors Return the chamber unit to its original position. Tighten the four white knurled screws on the chamber unit. Tighten the knurled screws so that the chamber unit is secured in place. Gas leaks may result if the knurled screws are not tightened properly.

  • Page 41: Wiring Procedure

    4. Installation 4-6 Wiring procedure 4-6 Wiring procedure CAUTION  Take care to avoid damaging internal electronic circuits during wiring work. Additionally, avoid excessive cable weights or cable routing that may generate excessive stress.  Do not route the power cable and signal cable alongside power lines for motors or similar equipment.

  • Page 42: Terminal Plate Specifications 4-20Ma Ea

    4. Installation 4-6 Wiring procedure 4-6-2 Terminal plate specifications 4-20mA <Terminal plate> ＋ ＋ ＋ ＋ ＋ 24 V DC 4 - 20 mA 4 - 20 mA 4 - 20 mA 4 - 20 mA FAULT ALM1 ALM2 ALM1 ALM2 ALM1 ALM2...

  • Page 43: Terminal Plate Connections

    4. Installation 4-6 Wiring procedure <Compatible bar terminals> Use the following bar terminals:  Bar terminal (ferrule): Model 216 series (WAGO)  Crimping tool: Variocrimp 4 (206- 204) (WAGO) CAUTION  Be sure to use the specified bar terminal. Performance is guaranteed only for the bar terminals specified.

  • Page 44: Grounding Terminal Connections

    4. Installation 4-6 Wiring procedure 4-6-4 Grounding terminal connections WARNING  Be sure to ground the product before supplying power.  Ground the product to ensure stable operation and safety. Never connect grounding wires to gas pipes.  Make sure the grounding is Class D or equivalent (grounding resistance not exceeding 100 Ω). ...
  • Page 45 4. Installation 4-6 Wiring procedure <Connection example: EA models (24 V DC)> GD-84D-EX-EA-EC Upstream GD-84D-EX-EA (PC, PLC) Switching hub Stabilized power supply (24 V DC) Upstream (DCS, PLC) <Connection example: EA models (PoE+)> Upstream GD-84D-EX-EA-EC (PC, PLC) GD-84D-EX-EA Switching hub (With PoE+ functionality) Upstream...

  • Page 46: Pipe Installation

    4. Installation 4-7 Pipe installation 4-7 Pipe installation Install the pipes for the sampling pipes (GAS IN, GAS OUT) as shown in the following diagram: The supported piping is Teflon pipe of φ6 (OD) to φ4 (ID). Union Ferrule Sleeve Pipe NOTE ...
  • Page 47 4. Installation 4-7 Pipe installation CAUTION  Make the piping on the GAS IN side as short as possible. The longer the piping on the GAS IN side, the more time it will take for the gas to arrive. Additionally, depending on the gas, the effects of absorption may increase, causing delays in response or readings showing reduced values.

  • Page 48: Usage Instructions

    5. Usage Instructions 5-1 Preparations for startup Usage Instructions 5-1 Preparations for startup Perform the following checks before connecting the power supply. Failure to perform these checks may result in electric shock or damage to the product.  Check to confirm the product is grounded. ...

  • Page 49: Turning On The Power

    5. Usage Instructions 5-2 Turning on the power 5-2 Turning on the power To start the product, turn on the power switch on the underside of the main unit. Before turning on the power switch, confirm that the product is properly connected to an appropriate power source.
  • Page 50 5. Usage Instructions 5-2 Turning on the power CAUTION  Never turn the power off during initialization. The sensor memory is read during initialization.  Depending on the sensor type, warmup may be required before startup or after replacing the sensor.

  • Page 51: Basic Operation Flow

    5. Usage Instructions 5-3 Basic operation flow 5-3 Basic operation flow After power is turned on, pressing the keys on the product will have the following effects: The product normally operates in detection mode <Detection mode> After recovery, turn on the power to restart MODE key (long press) <User mode>...
  • Page 52 5. Usage Instructions 5-3 Basic operation flow WARNING  When in an alarm state in detection mode, switching to user mode or maintenance mode will reset the alarm. 52 / 191...

  • Page 53: User Mode

    5. Usage Instructions 5-4 User mode 5-4 User mode Switch to user mode to perform zero calibration and to check various settings. 5-4-1 User mode setting items LCD display Setting item Details 1- 1 AIR Air calibration Perform air calibration. 1- 2 CONFIRM Setting display Displays the current values for the following...

  • Page 54: Switching To User Mode

    5. Usage Instructions 5-4 User mode 5-4-2 Switching to user mode In detection mode, hold down the MODE key (about three seconds). Switches to user mode. After making the settings, hold down the MODE key for about three seconds in user mode to switch to detection mode.

  • Page 55: Performing Air Calibration (Air)

    5. Usage Instructions 5-5 Performing air calibration (AIR) 5-5 Performing air calibration (AIR) Perform air calibration. This is required to ensure accurate measurement of gas concentrations. To perform air calibration, connect an air calibration gas to the product. Refer to ‘7-5-3 Connecting the calibration gas’ for more information. CAUTION ...
  • Page 56 5. Usage Instructions 5-5 Performing air calibration (AIR) Introduce the air calibration gas. Press the TEST/SET key when the readings stabilize. Air calibration starts. When all are selected When [A1] is selected Check the air calibration results. If air calibration is successful [OK] is displayed.

  • Page 57: Checking Setting Values (User Mode)

    5. Usage Instructions 5-6 Checking setting values (user mode) 5-6 Checking setting values (user mode) 5-6-1 Checking the alarm setpoints (CONFIRM) Display the first alarm setpoint, second alarm setpoint, alarm delay time, zero suppression value, zero following setting, and sensitivity correction settings. NOTE ...
  • Page 58 5. Usage Instructions 5-6 Checking setting values (user mode) ・ Alarm delay time display Displays the alarm delay time (in seconds). ・ Zero suppression value display Displays the zero suppression value. ・ Zero follower ON/OFF display Displays the zero follower ON/OFF setting. (Refer to ‘6-4-2 Zero follower function’.) ・...

  • Page 59: Checking Flow Values (Flow)

    5. Usage Instructions 5-6 Checking setting values (user mode) NOTE  The first alarm setpoint, second alarm setpoint, and alarm delay time can be set in Environmental setting 1 in maintenance mode. (Refer to ‘7-9 Making changes in Environmental setting 1’.) ...

  • Page 60: Checking The Version Of The Main Unit (84D Ver)

    5. Usage Instructions 5-6 Checking setting values (user mode) 5-6-3 Checking the version of the main unit (84D VER) Display the ROM/SUM value for the main unit and the ROM/SUM value for the terminal unit. The ROM/SUM value for the terminal unit is displayed only for 4 - 20 mA and EA models. Press the ▲...

  • Page 61: Checking The Sensor Versions (Sen Ver)

    5. Usage Instructions 5-6 Checking setting values (user mode) 5-6-4 Checking the sensor versions (SEN VER) Displays ROM/SUM values for the sensors currently fitted. Press the ▲ key or ▼ key in user mode to select [1- 6 SEN VER], then press the TEST/SET key. Check the sensor ROM/SUM values.

  • Page 62: Shutting Down

    5. Usage Instructions 5-7 Shutting down 5-7 Shutting down To turn off the product, turn the power switch on the underside of the main unit OFF in detection mode. Power switch WARNING  Shutting down the product may activate an alarm in the upstream (central) system. ...

  • Page 63: Alarm Activation

    6. Alarm Activation 6-1 Gas (oxygen) alarm pattern Alarm Activation 6-1 Gas (oxygen) alarm pattern 6-1-1 Alarm Activation The product issues an alarm when the detected gas or oxygen concentration reaches or exceeds the alarm setpoint. (Auto reset or self-latching) NOTE ...

  • Page 64: Contact Operation (Auto Reset) 4-20Ma Ea

    6. Alarm Activation 6-1 Gas (oxygen) alarm pattern 6-1-2 Contact operation (auto reset) 4-20mA If the Gas alarm pattern setting is auto reset, the contacts will activate when the gas concentration reaches or exceeds the alarm setpoint. The contact operation is automatically reset when the gas concentration falls below the alarm setpoint. NOTE ...

  • Page 65: Contact Operation (Self-Latching) 4-20Ma Ea

    6. Alarm Activation 6-1 Gas (oxygen) alarm pattern 6-1-3 Contact operation (self-latching) 4-20mA If the Gas alarm pattern setting is self-latching, the contacts will activate when the gas concentration reaches or exceeds the alarm setpoint. The contact operation is automatically reset when the gas concentration falls below the alarm setpoint after resetting.
  • Page 66 6. Alarm Activation 6-1 Gas (oxygen) alarm pattern <Alarm pattern (L-H)> Normal Alarm Reset Alarm Reset Gas concentration Reset Reset ■ ALM1 alarm lamp (red) ■ ALM2 alarm lamp (red) ■ ALM1 alarm contact ■ ALM2 alarm contact Reset Reset ■...
  • Page 67 6. Alarm Activation 6-1 Gas (oxygen) alarm pattern <Alarm pattern (L-LL)> (Oxygen deficiency alarm) Normal Alarm Reset Gas concentration Reset Reset ■ ALM1 alarm lamp (red) ■ ALM2 alarm lamp (red) ■ ALM1 alarm contact ■ ALM2 alarm contact Reset ■...

  • Page 68: Response When A Gas Alarm Is Triggered

    6. Alarm Activation 6-1 Gas (oxygen) alarm pattern 6-1-4 Response when a gas alarm is triggered When a gas alarm is triggered, respond promptly in accordance with the user's management rules. In general, take the following actions: Step 1 Check the product reading. CAUTION ...

  • Page 69: Fault Alarm Patterns

     If a fault alarm occurs, determine the cause and take appropriate action.  If faults occur repeatedly, contact Riken Keiki immediately.  The system enables fault alarm tests. (Refer to ‘7-9-4 Fault alarm tests (F TEST)’.) 69 / 191...

  • Page 70: External Output Operations

    6. Alarm Activation 6-3 External output operations 6-3 External output operations Communication 4 - 20 mA Ethernet method Signal transmission Analog transmission (non-insulated) Ethernet (10BASE-T/100BASE-TX) method Transmission path CVVS Ethernet cable 1 km or less Transmission 100 m or less (depending on system distance conditions) Connected load...
  • Page 71 6. Alarm Activation 6-3 External output operations <Analog transmission (4 - 20 mA)> <Example of gas concentration and external output> Maintenance output : 2.5 mA setting Fault output : 0.5 mA setting External output 22 mA 20 mA Detection mode Maintenance mode 4 mA 2.5 mA...
  • Page 72 6-3 External output operations <GD-84D-EX-ET communication specifications (Ethernet)> The following functions are provided through connections to external software using standard network protocols. Refer to the ‘Gas Detector Head GD-84D-EX Series (Ethernet model) Communication Functions Operating Manual’ for more information.  Web function(s) (HTTP) Use a web browser from a connected PC to view and change settings, execute calibration, and perform tests through the graphical user interface.

  • Page 73: Various Functions To Ensure Proper Alarm Activation

    6. Alarm Activation 6-4 Various functions to ensure proper alarm activation 6-4 Various functions to ensure proper alarm activation 6-4-1 Zero suppression function The sensors incorporated into the product are susceptible to fluctuations in ambient conditions (e.g., temperature and humidity characteristics) and interference gases (interference characteristics). These can affect readings.

  • Page 74: Zero Follower Function

    6. Alarm Activation 6-4 Various functions to ensure proper alarm activation 6-4-2 Zero follower function Depending on sensor specifications, the sensors used in the product may suffer sensitivity degradation when used for extended periods. The zero follower function is programmed processing designed to stabilize the zero point by correcting fluctuations in readings (zero drift) caused by the sensitivity variation over time of the zero point.

  • Page 75: Calibration History, Alarm Trend History, And Event History Functions

    6. Alarm Activation 6-4 Various functions to ensure proper alarm activation 6-4-4 Calibration history, alarm trend history, and event history functions History functions are available for both the device and for the sensors. Contact our sales department if you want to use the calibration history, alarm trend history, or event history functions.
  • Page 76 6. Alarm Activation 6-4 Various functions to ensure proper alarm activation CAUTION  Confirming changes in sensor specifications (e.g., detection principal, sensor type, detection target gas, and detection range) when [C-02] is displayed will reflect the changes in gas detector specifications.

  • Page 77: Maintenance

    Preparing a calibration gas requires dedicated equipment, including gas cylinders of the specified concentration and gas sampling bags. Our certified service engineers have expert knowledge of these dedicated tools and products. Please take advantage of the Riken Keiki maintenance service to maintain safe use of the product. 77 / 191...
  • Page 78 7. Maintenance 7-1 Maintenance intervals and maintenance items The major maintenance items are as follows. Contact our sales department for more information. Service Service details Power supply check ・ Check voltage of power source. ・ Check to confirm that the power LED lights up. (Confirm that you can distinguish between the system power lamp (POWER), alarm lamps (ALM1, ALM2), and fault lamp (FAULT).) ・...

  • Page 79: Performing Alarm Tests

    7. Maintenance 7-2 Performing alarm tests 7-2 Performing alarm tests A signal is emitted that simulates a gas concentration, enabling checks of the alarm lamps and the status of signal transmissions to external devices. WARNING  Before starting an alarm test, notify the related departments so that measures can be taken to ensure that problems do not arise due to external output signals or alarm contacts.
  • Page 80 7. Maintenance 7-2 Performing alarm tests The second alarm is triggered when the concentration reaches the second alarm setpoint. When the second alarm is triggered, alarm lamp (ALM1) and alarm lamp (ALM2) light up (red). When [TEST ON], then the contact of the second alarm is activated.

  • Page 81: Maintenance (Regular Maintenance) Mode

    7. Maintenance 7-3 Maintenance (regular maintenance) mode 7-3 Maintenance (regular maintenance) mode Switch to maintenance mode to perform zero calibration, make span adjustments, and to make various other settings. 7-3-1 Maintenance mode setting items LCD display Setting item Details 2- 0 GAS TEST Gas introduction test Perform a gas introduction test.

  • Page 82: Switching To Maintenance Mode

    7. Maintenance 7-3 Maintenance (regular maintenance) mode 7-3-2 Switching to maintenance mode In detection mode, hold down the MODE key for about three seconds. Switches to user mode. Press the ▲ key or ▼ key to select [1- 8 M MODE], then press the TEST/SET key.
  • Page 83  If password setting is ON, a password must be entered to switch to maintenance mode.  The password is set beforehand by Riken Keiki. Please contact our sales department if you do not know the password.  Select [2-15 RETURN] in maintenance mode and press the TEST/SET key to switch to user mode.

  • Page 84: Performing A Gas Introduction Test

    7. Maintenance 7-4 Performing a gas introduction test 7-4 Performing a gas introduction test Perform operational checks to confirm that the sensors react to the gases. You can check the operation of the sensors without activating the contacts, external output(s), or alarms. The gas introduction test can be performed separately for each sensor or for all sensors at the same time.

  • Page 85: Performing Calibration

    7. Maintenance 7-5 Performing calibration 7-5 Performing calibration Before performing calibration, prepare a gas sampling bag with the calibration gas and another gas sampling bag for the exhaust gas. 7-5-1 Running zero calibration Correct zero calibration is required for accurate measurements of gas concentrations. Zero calibration is essential for accurate measurements.
  • Page 86 7. Maintenance 7-5 Performing calibration This step confirms that the selected sensor and the flow passage match. When all are selected When [A1] is selected Introduce the gas for zero calibration and press the TEST/SET key. Zero calibration starts. When [A1] is selected When all are selected Check the zero calibration results.

  • Page 87: Running Span Adjustment

    7. Maintenance 7-5 Performing calibration 7-5-2 Running span adjustment Perform span adjustment. This is required to ensure accurate measurements of gas concentrations. Perform span adjustment for each sensor. CAUTION  To perform span adjustment, introduce the gas for span adjustment, then wait for the reading to stabilize.
  • Page 88 7. Maintenance 7-5 Performing calibration Introduce the gas for span adjustment, and press the TEST/SET key when the concentration stabilizes. The TEST/SET key will not work if concentrations are less than 10 % of the full scale. Press the ▲ key or ▼ key to match the introduced gas concentration.
  • Page 89 7. Maintenance 7-5 Performing calibration 10 Disconnect the calibration gas from this product. When span adjustment is complete, disconnect the span gas sampling bag and the gas sampling bag for exhaust gas. (Refer to ‘7-5-4 Disconnecting the calibration gas’.) Return the chamber switching unit to the [D] (detection mode) position. 11 Press the MODE key.

  • Page 90: Connecting The Calibration Gas

    7. Maintenance 7-5 Performing calibration 7-5-3 Connecting the calibration gas With the pump stopped, connect the gas sampling bag with calibration gas and the gas sampling bag for exhaust gas to the product. <If calibration is to be performed for all sensors> Connect the gas sampling bag with calibration gas to GAS IN on this product and connect the gas sampling bag for exhaust gas to GAS OUT.
  • Page 91 7. Maintenance 7-5 Performing calibration Pull the chamber switching unit towards you and turn to the left or right to place the nipple in the [CAL A] or [CAL B] position. When performing air calibration for the sensors in flow passage A ([A1], [A2]), turn to [CAL A].

  • Page 92: Disconnecting The Calibration Gas

    7. Maintenance 7-5 Performing calibration 7-5-4 Disconnecting the calibration gas <If calibration was performed for all sensors> Disconnect the gas sampling bag with calibration gas and the gas sampling bag for exhaust gas from the product. <If calibration was performed for each sensor> Disconnect the gas sampling bag with calibration gas and the gas sampling bag for exhaust gas from the product, then return the chamber switching unit to the [D] (detection mode) position.

  • Page 93: Adjusting The Flow

    7. Maintenance 7-6 Adjusting the flow 7-6 Adjusting the flow The flow of this product is automatically adjusted by the automatic flow adjuster function to 0.6 L/min ± 10 % (0.54 - 0.66). Set the automatic flow adjuster function to OFF to adjust the flow manually. NOTE ...

  • Page 94: Manually Adjusting The Flow (Flow)

    7. Maintenance 7-6 Adjusting the flow NOTE  Press the SHIFT key in step 2 while the flow is displayed to view the following information as you hold down the key. ・ Diag. : Self-diagnostic function ON/OFF setting ・ Reg.Diag. : Regular self-diagnostic ON/OFF setting Flow automatic Flow automatic adjustment: ON...

  • Page 95: Correcting The Flow Value (Def Flow)

    7. Maintenance 7-6 Adjusting the flow 7-6-3 Correcting the flow value (DEF FLOW) Due to aging deterioration of the flow sensor, inappropriate default settings for flow, etc., an error affecting the flow display may occur. In such cases, correct the flow display. Flow value corrections are possible whether the automatic flow adjuster function is set to ON or OFF.

  • Page 96: Checking Setting Values (Maintenance Mode)

    7. Maintenance 7-7 Checking setting values (maintenance mode) 7-7 Checking setting values (maintenance mode) 7-7-1 Checking the date last calibrated (LAST CAL) Display the date on which calibration was last performed for each sensor. No date is displayed if calibration has not been performed since sensor manufacture. In maintenance mode, press the ▲...

  • Page 97: Checking The Set Potential (E Volt)

    7. Maintenance 7-7 Checking setting values (maintenance mode) 7-7-2 Checking the set potential (E VOLT) This displays the set voltage of the electrochemical type sensor (ESF), or the element voltage of the semiconductor type sensor (SGF) or hot-wire type semiconductor sensor (SHF). In maintenance mode, press the ▲...

  • Page 98: Setting The Initial Date Of Sensor Use (S Set)

    7. Maintenance 7-8 Setting the initial date of sensor use (S SET) 7-8 Setting the initial date of sensor use (S SET) Set the date of first use for the sensor. This setting becomes invalid when the sensor is replaced. In maintenance mode, press the ▲...

  • Page 99: Making Changes In Environmental Setting 1

    7. Maintenance 7-9 Making changes in Environmental setting 1 7-9 Making changes in Environmental setting 1 The following items can be set in Environmental setting 1: LCD display Setting item Remarks 2- 9 SETTING1 Environmental setting 1 SET- 0 INHIBIT INHIBIT setting SET- 1 ALM P ALARM SETTING...
  • Page 100 7. Maintenance 7-9 Making changes in Environmental setting 1 Press the ▲ key or ▼ key to select the sensor. Press the ▲ key or ▼ key repeatedly to cycle through the following settings: [A1]⇔[A2]⇔[B1]⇔[B2]. The setting value for the selected sensor blinks. Press the TEST/SET key to confirm the sensor.

  • Page 101: Alarm Setpoints (Alm P)

    7. Maintenance 7-9 Making changes in Environmental setting 1 7-9-2 Alarm setpoints (ALM P) Set the gas alarm setpoints (first alarm setpoint, second alarm setpoint) for each sensor. In maintenance mode, press the ▲ key or ▼ key to select [2- 9 SETTING1], then press the TEST/SET key. Press the ▲...
  • Page 102 7. Maintenance 7-9 Making changes in Environmental setting 1 Press the ▲ key or ▼ key to set the alarm value for the <Second alarm setpoint setting> second alarm setpoint, then press the TEST/SET key. The display reverts to the display in step 3. To continue making settings for other sensors, repeat steps 3 to 6.

  • Page 103: Alarm Delay Time Setting (Alm Dly)

    7. Maintenance 7-9 Making changes in Environmental setting 1 7-9-3 Alarm delay time setting (ALM DLY) Set the alarm delay time for each sensor. Set a time (0 - 60 seconds) to temporarily suspend activation to prevent false alarms caused by external noise.

  • Page 104: Fault Alarm Tests (F Test)

    7. Maintenance 7-9 Making changes in Environmental setting 1 Press the MODE key after making the settings. The display reverts to the [SET- 2 ALM DLY] display. Press the MODE key. The display reverts to the [2- 9 SETTING1] display. 7-9-4 Fault alarm tests (F TEST) Perform fault alarm tests for each sensor.
  • Page 105 7. Maintenance 7-9 Making changes in Environmental setting 1 Press the ▲ key or ▼ key to select [ON], then press the TEST/SET key. Check to confirm that a fault alarm is triggered, then press the TEST/SET key. When the fault alarm is triggered, the fault lamp (FAULT) lights up (yellow).

  • Page 106: Terminal Unit Settings (Opt Act) 4-20Ma Ea

    7. Maintenance 7-9 Making changes in Environmental setting 1 7-9-5 Terminal unit settings (OPT ACT) 4-20mA Set whether to enable or disable the terminal unit. In maintenance mode, press the ▲ key or ▼ key to select [2- 9 SETTING1], then press the TEST/SET key. Press the ▲...

  • Page 107: Making Changes In Environmental Setting 2

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10 Making changes in Environmental setting 2 The following items can be set in Environmental setting 2: LCD display Setting item Remarks 2-10 SETTING2 Environmental setting 2 SET- 0 ADDRESS Address setting Not used SET- 1 DAY TIME Date/time setting...

  • Page 108: Date And Time Setting (Day Time)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-1 Date and time setting (DAY TIME) Sets the date and time (year, month, date, hours, minutes) for the internal clock. In maintenance mode, press the ▲ key or ▼ key to select [2-10 SETTING2], then press the TEST/SET key.
  • Page 109 7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to set the month, then press the TEST/SET key. Press the ▲ key or ▼ key to set the day, then press the TEST/SET key. Press the ▲...

  • Page 110: Zero Suppression Value Setting (Suppress)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-2 Zero suppression value setting (SUPPRESS) Set the zero suppression value for each sensor. In maintenance mode, press the ▲ key or ▼ key to select [2-10 SETTING2], then press the TEST/SET key. Press the ▲...

  • Page 111: Zero Suppression Type Setting (Sup Type)

    7. Maintenance 7-10 Making changes in Environmental setting 2 Press the MODE key after making the settings. The display reverts to the [SET- 2 SUPPRESS] display. Press the MODE key. The display reverts to the [2-10 SETTING2] display. 7-10-3 Zero suppression type setting (SUP TYPE) Set the zero suppression type for each sensor.
  • Page 112 7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to select [CUT] or [SLOPE], then press the TEST/SET key. The display reverts to the display in step 3. To continue making settings for other sensors, repeat steps 3 to 5. Press the MODE key after making the settings.

  • Page 113: Settings For Contacts During Alarm Tests (Test Rly) 4-20Ma Ea

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-4 Settings for contacts during alarm tests (TEST RLY) 4-20mA Set the operation of contacts during alarm tests ON or OFF. Set to ON to allow contacts to operate during alarm tests. The default setting is OFF.

  • Page 114: Settings For External Output During Alarm Tests (Test4-20) 4-20Ma Ea

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-5 Settings for external output during alarm tests (TEST4-20) 4-20mA Set the external output during alarm tests ON or OFF. Set to ON to use external output (4 - 20 mA) during alarm tests. When set to OFF, the output from immediately before the alarm test is maintained.

  • Page 115: Energized/De-Energized Setting (Rly Ptrn) 4-20Ma Ea

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-6 Energized/de-energized setting (RLY PTRN) 4-20mA Set energized/de-energized for the first alarm contact, second alarm contact, and fault alarm contact. Set de-energized ([ND]) or energized ([NE]) for each contact.  If the setting is de-energized, the relay is energized at an alarm state. (De-energized in normal conditions) ・...
  • Page 116 7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to select [ND] or <First alarm contact setting> [NE], then press the TEST/SET key. Press the ▲ key or ▼ key to select [ND] or <Second alarm contact setting>...
  • Page 117 7. Maintenance 7-10 Making changes in Environmental setting 2 <Setting the fault alarm contact> In maintenance mode, press the ▲ key or ▼ key to select [2-10 SETTING2], then press the TEST/SET key. Select [SET- 6 RLY PTRN], then press the TEST/SET key. Press the ▲...

  • Page 118: Alarm Type Setting (Alm Type)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-7 Alarm type setting (ALM TYPE) Set the alarm type for each sensor. When an oxygen deficiency alarm model sensor is fitted, any of H-HH type, L-LL type, or L-H type can be set.
  • Page 119 7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to select [H-HH], [L-LL], or [L-H], then press the TEST/SET key. The display reverts to the display in step 3. To continue making settings for other sensors, repeat steps 3 to 5. Press the MODE key after making the settings.

  • Page 120: Alarm Pattern Setting (Alm Ptrn)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-8 Alarm pattern setting (ALM PTRN) Set the alarm patterns for the alarm setpoints. Set to either auto-reset ([NL]) or self-latching ([L]). The default setting is auto-reset ([NL]). NOTE  The alarm pattern settings will affect how the device behaves. For normal use, leave this setting unchanged.

  • Page 121: Alarm Value Limiter Setting (Al Limit)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-9 Alarm value limiter setting (AL LIMIT) Set ON/OFF for the alarm point limiter. The default setting is ON. NOTE  The alarm value limiter settings will affect how the device behaves. For normal use, leave this setting unchanged.

  • Page 122: Fault Pattern Setting (Flt Ptrn)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-10 Fault pattern setting (FLT PTRN) Set the fault alarm pattern. Set to either auto-reset ([NL]) or self-latching ([L]). The default setting is auto-reset ([NL]). NOTE  The fault pattern settings will affect how the device behaves. For normal use, leave this setting unchanged.

  • Page 123: Flow Automatic Adjustment Setting (At Flow)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-11 Flow automatic adjustment setting (AT FLOW) Set the automatic flow adjuster function ON/OFF. The automatic flow adjuster function is enabled when set to ON. The automatic flow adjuster function is disabled when set to OFF to allow manual flow adjustments. The default setting is ON.

  • Page 124: Zero Follower Setting (Zero)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-12 Zero follower setting (ZERO) Set ON/OFF for the zero follower function for each sensor. (Refer to ‘6-4-2 Zero follower function’.) The default setting is ON. NOTE  Zero follower settings are possible for new ceramic type and electrochemical type detection principle sensors.

  • Page 125: 24-Hour Zero Follower Settings (Zero 24F)

    7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to select [ON] or [OFF], then press the TEST/SET key. The display reverts to the display in step 3. To continue making settings for other sensors, repeat steps 3 to 5. Press the MODE key after making the settings.
  • Page 126 7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to select the sensor. Press the ▲ key or ▼ key repeatedly to cycle through the following settings: [A1]⇔[A2]⇔[B1]⇔[B2]. The setting value for the selected sensor blinks. Press the TEST/SET key to confirm the sensor.

  • Page 127: Sensitivity Correction Settings (S Assist)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-14 Sensitivity correction settings (S ASSIST) Set ON/OFF for the sensitivity correction function for each sensor. (Refer to '6-4-3 Sensitivity correction function’.) The default setting is ON. NOTE  The sensitivity correction settings are possible for electrochemical type detection principle sensors. In maintenance mode, press the ▲...

  • Page 128: External Output In Maintenance Mode Setting (Mnt Out) 4-20Ma Ea

    7. Maintenance 7-10 Making changes in Environmental setting 2 Press the MODE key after making the settings. The display reverts to the [SET-14 S ASSIST] display. Press the MODE key. The display reverts to the [2-10 SETTING2] display. 7-10-15 External output in maintenance mode setting (MNT OUT) 4-20mA Make settings for external output in maintenance mode for each sensor.
  • Page 129 7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to select [2.5], [4-20], [HOLD], or [4.0], then press the TEST/SET key. The display reverts to the display in step 3. To continue making settings for other sensors, repeat steps 3 to 5. Press the MODE key after making the settings.

  • Page 130: External Output Adjustment (Ma 4- 20) 4-20Ma Ea

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-16 External output adjustment (MA 4- 20) 4-20mA Adjust the external output of 4 mA and 20 mA for each sensor. Connect the device signal cable to an ammeter. In maintenance mode, press the ▲ key or ▼ key to select [2-10 SETTING2], then press the TEST/SET key.

  • Page 131: Backlight Setting (Bk Light)

    7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to adjust the output (%). <20 mA adjustment> Confirm that the ammeter reading is 20 mA and press the TEST/SET key. The display reverts to the display in step 3. To continue making adjustments for other sensors, repeat steps 3 to 6.

  • Page 132: Ethernet Settings (Ethernet) Et Ea

    7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to select [ON] or [SAVE], then press the TEST/SET key. The display reverts to the [SET-17 BK LIGHT] display. Press the MODE key. The display reverts to the [2-10 SETTING2] display. NOTE ...
  • Page 133 7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to select [SET-18 ETHERNET], then press the TEST/SET key. Select [IP Address], then press the TEST/SET key. Press the ▲ key or ▼ key to set the IP address, then press the TEST/SET key.
  • Page 134 7. Maintenance 7-10 Making changes in Environmental setting 2 11 Press the ▲ key or ▼ key to select [PLC Mode], then press the TEST/SET key. 12 Press the ▲ key or ▼ key to set the PLC mode, then press the TEST/SET key.

  • Page 135: Pump Drive Level Diagnostic Settings (Pump Ck)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-19 Pump drive level diagnostic settings (PUMP CK) Set ON/OFF for pump drive level diagnostics. Set to ON to run periodic diagnostics on pump drive levels. The default setting is ON. In maintenance mode, press the ▲...
  • Page 136 7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-20 Setting for the behavior of fault contacts when flow is low (FLT RLY) 4-20mA Set the operation of fault contacts when flow is low ON or OFF. When set to ON, fault contacts operate when the flow is low. The default setting is ON.

  • Page 137: External Output During Fault Setting (Flt Out) 4-20Ma Ea

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-21 External output during fault setting (FLT OUT) 4-20mA Set the external output when there is a fault for each sensor. Select one of the following:  0.5 mA ([0.5]) : Set the external output value to 0.5 mA. ...

  • Page 138: Caution Display Setting (Cau Disp)

    7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to select [0.5], [21.5], or [OPT], then press the TEST/SET key. If you select [OPT], press the ▲ key or ▼ key to set the external output value, then press the TEST/SET key.
  • Page 139 7. Maintenance 7-10 Making changes in Environmental setting 2 In maintenance mode, press the ▲ key or ▼ key to select [2-10 SETTING2], then press the TEST/SET key. Press the ▲ key or ▼ key to select [SET-22 CAU DISP], then press the TEST/SET key.

  • Page 140: Caution Output Setting (Cau Out)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-23 Caution output setting (CAU OUT) Set whether to externally output cautions. Set ON/OFF for the following cautions. For more information on each caution, refer to ‘10. Troubleshooting’.  E-8X (E-80, E-81, E-82) ...

  • Page 141: Displayed Gas Name Setting (Gas Name)

    7. Maintenance 7-10 Making changes in Environmental setting 2 Press the ▲ key or ▼ key to select [ON] or [OFF], then press the TEST/SET key. The display reverts to the display in step 3. To continue making settings for other fault codes, repeat steps 3 to 4. Press the MODE key after making the settings.
  • Page 142 7. Maintenance 7-10 Making changes in Environmental setting 2 Press the TEST/ SET key or MODE key to move the cursor. To move to the next character, press the TEST/SET key. To move to the previous character, press the MODE key. Press the ▲...

  • Page 143: Lcd Contrast Adjustment (Contrast)

    7. Maintenance 7-10 Making changes in Environmental setting 2 7-10-25 LCD contrast adjustment (CONTRAST) Adjust the contrast of the LCD. In maintenance mode, press the ▲ key or ▼ key to select [2-10 SETTING2], then press the TEST/SET key. Press the ▲ key or ▼ key to select [SET-25 CONTRAST], then press the TEST/SET key.

  • Page 144: Replacing And Cleaning Parts

    8. Replacing and cleaning parts 8-1 Replacing consumable parts Replacing and cleaning parts 8-1 Replacing consumable parts The sensors and dust filters are consumables. Replace them when needed based on operating conditions. 8-1-1 Replacing sensors If the main unit is running, stop the pump and fan before replacing the sensors. In maintenance mode , press the ▲...
  • Page 145 8. Replacing and cleaning parts 8-1 Replacing consumable parts Pull the projection on the top of the main unit towards you to open the front cover. The front cover opens to approximately 120°. Push further to open to 180°. Loosen the four white knurled screws on the chamber unit.
  • Page 146 8. Replacing and cleaning parts 8-1 Replacing consumable parts Remove the sensor. Remove the sensor fitted to the position selected in step 6. The LEDs for sensors that can be removed will turn off. Grasp the cylindrical part of the sensor and pull out. Attach the new sensor.
  • Page 147 8. Replacing and cleaning parts 8-1 Replacing consumable parts The pump and fan restart. The sensor reconnection and sensor combinations are confirmed. 13 Press the TEST/ SET key when the screen indicates sensor replacement is complete. The display reverts to the [SET- 3 MAINTE] display. If replacement was not completed properly, refer to ‘<If sensors couldn't be replaced correctly>’...
  • Page 148 8. Replacing and cleaning parts 8-1 Replacing consumable parts <If sensors couldn't be replaced correctly> Depending on the problem, one of the following screens will appear if sensor replacement was unsuccessful:  If sensor was not replaced Press the TEST/SET key so the display returns to the [SET- 3 MAINTE] display.

  • Page 149: Dust Filter Replacement

    8. Replacing and cleaning parts 8-1 Replacing consumable parts 8-1-2 Dust filter replacement Check to confirm that the dust filters are neither dirty nor clogged. Replace, if necessary. If the main unit is running, stop the pump and fan before replacing the dust filter. In maintenance mode, press the ▲...

  • Page 150: Replacing Periodic Replacement Parts

    8. Replacing and cleaning parts 8-2 Replacing periodic replacement parts 8-2 Replacing periodic replacement parts 8-2-1 List of recommended periodic replacement parts Replacement Quantity Name Check interval interval (piece/unit) Pump unit 0.5 years 1 - 2 years Flow sensor unit 1 year 5 years Fan unit...
  • Page 151 8. Replacing and cleaning parts 8-2 Replacing periodic replacement parts Pull the projection on the top of the main unit towards you to open the front cover. The front cover opens to approximately 120°. Push further to open to 180°. Push in on the part indicated with “PUSH”...

  • Page 152: Flow Sensor Unit Replacement

    8. Replacing and cleaning parts 8-2 Replacing periodic replacement parts 8-2-3 Flow sensor unit replacement If the main unit is running, stop the pump and fan before replacing the flow sensor unit. In maintenance mode, press the ▲ key or ▼ key to select [2- 9 SETTING1], then press the TEST/SET key.
  • Page 153 8. Replacing and cleaning parts 8-2 Replacing periodic replacement parts Unscrew the one screw securing the flow sensor unit. Flow sensor unit Grasp the projections on the left and right of the flow sensor unit and pull out. Flow sensor unit projections Disconnect cable A and cable B connected to the two connectors on the flow sensor unit.
  • Page 154 8. Replacing and cleaning parts 8-2 Replacing periodic replacement parts 12 Return the chamber unit to its original position. 13 Tighten the four white knurled screws on the chamber unit. Tighten the knurled screws so that the chamber unit is secured in place. Gas leaks may result if the knurled screws are not tightened properly.

  • Page 155: Fan Unit Replacement

    8. Replacing and cleaning parts 8-2 Replacing periodic replacement parts 8-2-4 Fan unit replacement If the main unit is running, stop the pump and fan before replacing the fan unit. In maintenance mode, press the ▲ key or ▼ key to select [2- 9 SETTING1], then press the TEST/SET key.
  • Page 156 8. Replacing and cleaning parts 8-2 Replacing periodic replacement parts Match the fan unit to the shape of the main unit and push into place. Grasp by the grips on the left and right of the fan unit and push in until it is secured to the main unit. Insert the fan unit cable into the groove in the main unit.

  • Page 157: Cleaning This Product

    8. Replacing and cleaning parts 8-3 Cleaning this product 8-3 Cleaning this product Clean the product if it becomes excessively dirty.  Always turn the power OFF before cleaning the product.  Wipe off any dirt with a dry cloth. Using water or organic solvents to clean the product may result in malfunctions.

  • Page 158: Storage, Relocation, And Disposal

    9. Storage, Relocation, and Disposal 9-1 Procedures for storage or when not used for extended periods Storage, Relocation, and Disposal 9-1 Procedures for storage or when not used for extended periods The product must be stored under the following conditions: ...

  • Page 159: Relocation Or Reuse

    9. Storage, Relocation, and Disposal 9-2 Relocation or reuse 9-2 Relocation or reuse Before relocating the product, refer to ‘4-1 Installation precautions’ and ‘4-4 Installing the main unit’ for guidance on the relocation destination. Refer to ‘4-6 Wiring procedure’ and ‘4-7 Pipe installation’ for information on wiring and pipe installation.

  • Page 160: Troubleshooting

    10. Troubleshooting 10-1 Product abnormalities Troubleshooting This troubleshooting section does not address causes of all problems that may occur with the product. It provides brief explanations to assist in determining the causes of common problems. If you encounter symptoms not addressed here or if problems persist even after taking corrective action, contact our sales department.
  • Page 161 10. Troubleshooting 10-1 Product abnormalities <Sensor abnormalities> If the category is "fault alarm", the fault lamp (FAULT) either lights or flashes. Symptom/Display Category Cause Corrective action (Fault code) The sensor is not Check to confirm that the sensor is properly connected or attached and that the connector of the sensor connected...
  • Page 162 10. Troubleshooting 10-1 Product abnormalities <Flow abnormalities> If the category is "fault alarm", the fault lamp (FAULT) either lights or flashes. Symptom/Display Category Cause Corrective action (Fault code) The protective rubber Remove the protective rubber caps attached to GAS caps are still attached. IN and GAS OUT.
  • Page 163 10. Troubleshooting 10-1 Product abnormalities <System abnormality> If the category is "fault alarm", the fault lamp (FAULT) either lights or flashes. Symptom/Display Category Cause Corrective action (Fault code) The power supply voltage E-99 B-VOLT is not within the specified Check the voltage of the supplied power source. range of values.

  • Page 164: Reading Abnormalities

    10. Troubleshooting 10-2 Reading abnormalities 10-2 Reading abnormalities Symptom Cause Corrective action Sensor drift Perform zero calibration or air calibration. It is difficult to completely eliminate the effects of Presence of interference gases such as solvents. Contact Riken interference gases Keiki for information on countermeasures, such as interference gas removal filters.

  • Page 165: Product Specifications

    11. Product Specifications 11-1 GD-84D-EX Specifications Product Specifications 11-1 GD-84D-EX Specifications 11-1-1 GD-84D-EX-EC Detection principle Electrochemical type Detection target gas Toxic gases, oxygen Concentration display Full-dot display Detection range Depends on detection target gas Detection method Pump suction type Suction flow rate Total flow rate: approx.
  • Page 166 11. Product Specifications 11-1 GD-84D-EX Specifications Operating temperature -10 – 40 °C (no sudden changes) range Operating humidity 20 – 90 % RH (No condensation; may depend on the sensors installed.) range Construction Wall mounting type Approx. 150 (W)  190 (H)  146 mm (D) (excluding projections) External dimensions Weight Approximately 1.9 kg...

  • Page 167: Gd-84D-Ex

    11. Product Specifications 11-1 GD-84D-EX Specifications 11-1-2 GD-84D-EX Detection principle Electrochemical type, new ceramic type, semiconductor type, hot-wire semiconductor type Detection target gas Toxic gases, combustible gases, oxygen Concentration display Full-dot display Detection range Depends on detection target gas Detection method Pump suction type Total flow rate: approx.
  • Page 168 11. Product Specifications 11-1 GD-84D-EX Specifications <Exterior drawings> M4 mounting hole Operating Display switches M4 mounting hole <Terminal plate> ＋ ＋ ＋ ＋ ＋ 24 V DC 4 - 20 mA 4 - 20 mA 4 - 20 mA 4 - 20 mA FAULT ALM1 ALM2...

  • Page 169: Gd-84D-Ex-Et-Ec

    11. Product Specifications 11-1 GD-84D-EX Specifications 11-1-3 GD-84D-EX-ET-EC Detection principle Electrochemical type Detection target gas Toxic gases, oxygen Concentration display Full-dot display Detection range Depends on detection target gas Detection method Pump suction type Suction flow rate Total flow rate: approx. 0.6 L/min Alarm setpoints Depends on detection target gas Power supply...
  • Page 170 11. Product Specifications 11-1 GD-84D-EX Specifications <Exterior drawings> M4 mounting hole* Operating Display switches M4 screw supplied with main unit * An RJ-45 Ethernet connector is located on the underside of the main unit. 170 / 191...

  • Page 171: Gd-84D-Ex-Et

    11. Product Specifications 11-1 GD-84D-EX Specifications 11-1-4 GD-84D-EX-ET Detection principle Electrochemical type, new ceramic type, semiconductor type, hot-wire semiconductor type Detection target gas Toxic gases, combustible gases, oxygen Concentration display Full-dot display Detection range Depends on detection target gas Detection method Pump suction type Suction flow rate Total flow rate: approx.
  • Page 172 11. Product Specifications 11-1 GD-84D-EX Specifications <Exterior drawings> M4 mounting hole* Display Operating switches M4 screw supplied with main unit * An RJ-45 Ethernet connector is located on the underside of the main unit. 172 / 191...

  • Page 173: Gd-84D-Ex-Ea-Ec

    11. Product Specifications 11-1 GD-84D-EX Specifications 11-1-5 GD-84D-EX-EA-EC Detection principle Electrochemical type Detection target gas Toxic gases, oxygen Concentration display Full-dot display Detection range Depends on detection target gas. Detection method Pump suction type Total flow rate: approx. 0.6 L/min Suction flow rate Alarm setpoints Depends on detection target gas.
  • Page 174 11. Product Specifications 11-1 GD-84D-EX Specifications Weight Approximately 1.9 kg Exterior color Main unit: Black Front door: White <Exterior drawings> M4 mounting hole Operating Display switches M4 mounting hole * An RJ-45 Ethernet connector is located on the underside of the main unit. <Terminal plate>...

  • Page 175: Gd-84D-Ex-Ea

    11. Product Specifications 11-1 GD-84D-EX Specifications 11-1-6 GD-84D-EX-EA Detection principle Electrochemical type, new ceramic type, semiconductor type, hot-wire semiconductor type Detection target gas Toxic gases, combustible gases, oxygen Concentration display Full-dot display Detection range Depends on detection target gas. Detection method Pump suction type Total flow rate: approx.
  • Page 176 11. Product Specifications 11-1 GD-84D-EX Specifications Weight Approximately 1.9 kg Exterior color Main unit: Black Front door: White <Exterior drawings> M4 mounting hole Operating Display switches M4 mounting hole * An RJ-45 Ethernet connector is located on the underside of the main unit. <Terminal plate>...

  • Page 177: Sensor Specifications

    *4 This is the time required to reach the 18 vol% alarm point after supplying gas with a concentration of 10 to 11 vol% (excluding piping and communication delays) NOTE  Contact Riken Keiki for specifications and information on other sensors.  The number of years of ESF sensor warranty depends on the sensor model. Please refer to the sensor specification sheet.

  • Page 178: New Ceramic Type

    11. Product Specifications 11-2 Sensor specifications 11-2-2 New ceramic type Sensor model Detection target gas Combustible gas Detection range Depends on detection target gas. Detection method Pump suction type Alarm setpoints Depends on detection target gas. Alarm accuracy Within ±25 % (for identical conditions) Alarm delay time...

  • Page 179: Semiconductor Type

    11. Product Specifications 11-2 Sensor specifications 11-2-3 Semiconductor type Sensor model Detection target Combustible gas Toxic gas Detection range Depends on detection target gas. Detection method Pump suction type Alarm setpoints Depends on detection target gas. Alarm accuracy Within ±25 % Within ±30 % (for identical conditions)
  • Page 180 11. Product Specifications 11-2 Sensor specifications <Warmup time for semiconductor type sensors> Warmup time Unpowered period SGF-8581 Other SGF sensors Within 10 minutes 2 hours or more 30 minutes or more Within 1 hour 2 hours or more 2 hours or more Within 24 hours 4 hours or more 4 hours or more...

  • Page 181: Hot-Wire Semiconductor Type

    11. Product Specifications 11-2 Sensor specifications 11-2-4 Hot-wire semiconductor type Sensor model Detection target Combustible gas Toxic gas Detection range Depends on detection target gas. Detection method Pump suction type Alarm setpoints Depends on detection target gas. Alarm accuracy Within ±25 % Within ±30 % (for identical conditions)
  • Page 182 11. Product Specifications 11-2 Sensor specifications <Warmup time for hot-wire semiconductor type sensors> Warmup time Unpowered period Other SHF SHF-8603 sensors Within 10 minutes 10 minutes or 1 hours or more more Within 1 hour 30 minutes or 2 hours or more more Within 24 hours 1 hour or more...

  • Page 183: Appendix

    12. Appendix 12-1 Detection principle Appendix 12-1 Detection principle 12-1-1 Electrochemical type <Sensor overview> This sensor type detects gas concentrations as current generated when the detection target gas is electrolyzed on electrodes maintained at constant potential. This is the most effective gas sensor for detecting toxic gas.
  • Page 184 (e.g., in temperature or humidity) at the location where it is installed. 2. Set the alarm setpoint within the performance range of the device. In facilities subject to the High Pressure Gas Safety Act, when below the specified Riken Keiki standard alarm setpoint (maximum allowable concentration) may result in false alarms.

  • Page 185: New Ceramic Type

    The device uses an ultrafine particle (new ceramic) oxidation catalyst to detect gas concentrations over a wide range, from low concentrations (ppm) up to the lower explosive limit (LEL). This revolutionary gas detection sensor was developed by Riken Keiki and designed specifically to detect combustible gases. <Sensor structure and principle>...
  • Page 186 Use the alarm contact outputs on the product with external alarm lamps or buzzers. Use the analog signal output for indicators or external recorders. Riken Keiki rejects liability for malfunctions in cases in which this signal is used for any other controls.

  • Page 187: Semiconductor Type

    12. Appendix 12-1 Detection principle 12-1-3 Semiconductor type <Sensor overview> This method detects gas concentrations from variations in resistance that occur when a metal oxide semiconductor comes into contact with the detection target gas. This general-purpose gas detector sensor is ideal for detecting a wide range of gases, from toxic gases to combustible gases. <Sensor structure and principle>...
  • Page 188 Use the alarm contact outputs on the product with external alarm lamps or buzzers. Use the analog signal output for indicators or external recorders. Riken Keiki rejects liability for malfunctions in cases in which this signal is used for any other controls.

  • Page 189: Hot Wire Semiconductor Type

    12. Appendix 12-1 Detection principle 12-1-4 Hot wire semiconductor type <Sensor overview> This sensor type detects gas concentrations based on variations in the resistance of a platinum coil integrated with a metal oxide semiconductor whose resistance changes when it comes into contact with a gas.
  • Page 190 Use the alarm contact outputs on the product with external alarm lamps or buzzers. Use the analog signal output for indicators or external recorders. Riken Keiki rejects liability for malfunctions in cases in which this signal is used for any other controls.

  • Page 191: Terminology

    12. Appendix 12-2 Terminology 12-2 Terminology Term Definition Dust filter Filter for removing dust We recommend fitting an external dust filter if the product will be used in dusty surroundings. Different filters are specified for different detection target gases. Contact our sales department. vol% Indicates gas concentrations in units of parts per hundred by volume.
  • Page 192 Revision History Issue Revision details Issue date First issue (PT2-3041) 12/20/2022...

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