Riken Keiki GD-70D Series Operating Manual
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Riken Keiki GD-70D Series Operating Manual

Gas detector head
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Gas Detector Head
GD-70D Series
Operating Manual
GD-70D
GD-70D-NT
GD-70D-EA
GD-70D-DV
GD-70D-LN
PT2E-15613

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Summary of Contents for Riken Keiki GD-70D Series

  • Page 1 PT2E-15613 Gas Detector Head GD-70D Series GD-70D GD-70D-NT GD-70D-EA GD-70D-DV GD-70D-LN Operating Manual...

  • Page 2: Table Of Contents

    Contents 1. Outline of the Product ............................. 3 1-1. Preface ..............................3 1-2. Purpose of use ............................3 1-3. Definition of DANGER, WARNING, CAUTION and NOTE ..............4 1-4. Method of confirmation for CE marking type ................... 4 2. Important Notices on Safety ........................... 5 2-1.

  • Page 3: Outline Of The Product

    Outline of the Product 1-1. Preface Thank you for choosing our gas detector head GD-70D 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 gas detector and its specifications. It contains information required for using the detector properly.

  • Page 4: Definition Of Danger, Warning, Caution And Note

    1. Outline of the Product 1-3. Definition of DANGER, WARNING, CAUTION and NOTE 1-3. Definition of DANGER, WARNING, CAUTION and NOTE This message indicates that improper handling may cause serious damage DANGER on life, health or assets. This message indicates that improper handling may cause serious damage WARNING on health or assets.

  • Page 5: Important Notices On Safety

    2. Important Notices on Safety 2-1. Danger cases Important Notices on Safety 2-1. Danger cases DANGER This is not an explosion-proof unit. Do not use the unit in place where gas over the lower explosive limit may exist.

  • Page 6: Warning Cases

    2. Important Notices on Safety 2-2. Warning cases 2-2. Warning cases WARNING Power supply Before turning on the detector, 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 7: Precautions

    A dust filter to be used varies depending on the gas to be detected. For more information on dust filters, please contact RIKEN KEIKI. Observe the operating restrictions to prevent condensation inside the tube. Condensation formed inside the tube causes clogging or gas adsorption, which may disturb accurate gas detection.

  • Page 8: Product Components

    3. Product Components 3-1. Main unit and standard accessories Product Components 3-1. Main unit and standard accessories <Main Unit> <Standard Accessories>  Operating manual  Protective rubber cap (to be removed when using the detector)  Dedicated handling lever (for wiring) ...

  • Page 9: Outline Drawing

    3. Product Components 3-2. Outline drawing <Pyrolyzer Unit (PLU-70)(Option)> Pyrolyzer Unit * This is needed in “pyrolyzer + electrochemical type (ESU)” and “pyrolyzer + pyrolysis-particle type (SSU)”. For more information on the pyrolyzer unit (PLU-70), see the separate operating manual. 3-2.
  • Page 10 3. Product Components 3-2. Outline drawing ● GD-70D-DV (Main Unit + 70D-DV Unit) MS lamp NS lamp Display window Operating switch Mounting hole for 3-M5 Sensor unit display Terminal block DeviceNet communication socket Power switch Protective cover for power switch Screw for grounding earth rod...

  • Page 11: Names And Functions For Each Part

    3. Product Components 3-3. Names and functions for each part 3-3. Names and functions for each part The detector consists of the following units. ● Main Unit Pump unit Wall-mounted unit Main unit Sensor unit ● 70D-DV Unit 70D-DV unit Base 70D main unit Terminal plate for power/contact...
  • Page 12 3. Product Components 3-3. Names and functions for each part <Detaching and Attaching Main Unit> Detaching Main Unit While pushing the sky blue lock lever toward the wall-mounted unit, hold up the main unit. If you cannot move the main unit, insert a larger flathead screwdriver while pushing the lock lever, and you can easily detach it as shown below.
  • Page 13 3. Product Components 3-3. Names and functions for each part <Detaching and Attaching Sensor Unit> Push the two buttons at the top of the main unit together to open the front cover. (Pushing only either one button cannot open the cover, but then pushing the other can open it.) * The front cover opens about 90 degrees at first.
  • Page 14 3. Product Components 3-3. Names and functions for each part Rail Groove "PULL" Do not push here. × Connecting point (flow path) <70D-DV Unit Installation Procedure> Loosen two screws at the mounting holes of the 70D-DV unit (about five turns) to detach the base. If the base cannot be detached easily, insert the flathead screwdriver at the place indicated in the figure below, and then lift the 70D-DV unit to easily detach the base.
  • Page 15 3. Product Components 3-3. Names and functions for each part Opposite Slide downward 3-M5 Thread the screw heads Opposite side...
  • Page 16 3. Product Components 3-3. Names and functions for each part <Front Panel and Character LCD> (9) Second alarm lamp (1) MODE key (8) First alarm lamp (2) TEST/SET key (7) Power lamp (10) Fault lamp (3) ▲ key (20) Pyrolyzer unit (4) ▼...
  • Page 17 3. Product Components 3-3. Names and functions for each part (18) Maintenance indicator Displayed during the maintenance mode. When this indicator is displayed, the alarm contact is disconnected to be disabled. (19) Inhibit indicator Displayed when the inhibition (point skip) is set. (20) Pyrolyzer unit connection Displayed when the dedicated pyrolyzer unit (PLU-70) is connected.
  • Page 18 3. Product Components 3-3. Names and functions for each part <70D-DV Unit> (21) (22) (23) (24) (21) MS lamp Module status indicator lamp. It lights in green at a normal state. (22) NS lamp Network status indicator lamp. It lights in green at a normal state. (23) Terminal plate for Connects the power cables for power lines and contact output.
  • Page 19 The sensor unit must be stored in a clean, cool and dark place away from direct sunlight. Some types of the sensor units cannot be stored together with other units. Please contact RIKEN KEIKI for more information. Dedicated case ...
  • Page 20 3. Product Components 3-3. Names and functions for each part  New Ceramic Type Before using this sensor unit, it must be warmed up for two hours or more. (NCU)  The sensor unit must be stored under normal temperature/humidity in a clean place away from direct sunlight.

  • Page 21: Block Diagram

    3. Product Components 3-4. Block diagram 3-4. Block diagram <Electric Diagram> Sensor unit Amplifier Controller (CPU) Power supply part POWER INPUT (24 VDC) Display (POWER) (ALM1) (ALM2) (FAULT) Alarm contact controller Gas alarm contact (ALM1, Controller ALM2) (CPU) Fault alarm contact (FAULT) * Standard setting of Operating unit...
  • Page 22 3. Product Components 3-4. Block diagram <Tubing Diagram>...

  • Page 23: 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. CAUTION After you received the detector, start using the detector within the specified operation start limit of the sensor unit.
  • Page 24 4. How to Use 4-2. Precautions for installation sites Do not install the detector in a place with vibrations or shocks. The detector consists of sensitive electronic parts. The detector must be installed in a stable place without vibrations or shocks and it cannot drop. Do not install the detector in a place exposed to water, oil or chemicals.

  • Page 25: Precautions For System Designing

    4. How to Use 4-3. Precautions for system designing 4-3. Precautions for system designing CAUTION An unstable power supply and noise may cause malfunctions or false alarms. The descriptions in this section and each System Construction Manual must be reflected on the designing of a system using the detector.
  • Page 26 4. How to Use 4-3. Precautions for system designing Proper use of alarm contact The alarm contact of the detector is used to transmit signals to activate an external buzzer, alarm lamp or rotating lamp. Do not use it for controlling purpose (e.g. controlling the shutdown valve). CAUTION The "b"...

  • Page 27: How To Install

    4. How to Use 4-4. How to install 4-4. How to install NOTE To use the pyrolyzer unit (PLU-70), see also the separate operating manual. CAUTION Before installing the detector, remove the protective rubber caps from GAS IN and GAS OUT. If the detector is turned on with the rubber caps remaining while the installation, applied overload may damage the pump and sensor.
  • Page 28 4. How to Use 4-4. How to install CAUTION The detector must be installed in the right direction to ensure its performance. Install the detector as shown on the following example, and adjust its position so that it is placed horizontally. (* The direction of the detector must also be kept during transportation, including when it is removed temporarily or relocated.) <Right Installation Direction>...

  • Page 29: How To Wire

    4. How to Use 4-5. How to wire <Installation Dimensions and Maintenance Space of DV Specification> Leave the diagonal line area so that the installation space is reserved. Wall 4-5. How to wire NOTE To use the pyrolyzer unit (PLU-70), see also the separate operating manual. CAUTION ...
  • Page 30 4. How to Use 4-5. How to wire <Recommended Cables> ● 4 - 20 mA/NT/EA/LN Specification For 3-wire type (common cable for power Shielded cable of CVVS, etc. (1.25 mm ) - 3-core and signal) (4 - 20 mA/EA specification) For 2-wire type (power and signal cables Power: Cable of CVV, etc.
  • Page 31 4. How to Use 4-5. How to wire ● DV Specification Terminal plate for power/contact Green Blue Purple Grey Brown Bottom Note) Do not remove the wiring of the top terminal plate. Terminal plate for DeviceNet Black Blue White Terminal plate Drain (Black)
  • Page 32 4. How to Use 4-5. How to wire CAUTION The specified bare wire length must be observed when the wire insulation is peeled off. Improper clamping of the wire due to a shorter bare wire length may cause defective electric conduction or heating.
  • Page 33 4. How to Use 4-5. How to wire Push the dedicated handling lever to open the terminals, into which you can insert wires (one wire to one terminal). NOTE <How to Use the Dedicated Handling Lever> While holding down the lever, insert the Push the lever with your wire into the (round) wiring hole until it finger to lower the spring in...
  • Page 34 4. How to Use 4-5. How to wire NOTE When an optional cable gland is used, it must be attached to the external wiring hole. <Grounding> Connect the detector to your grounding terminal. WARNING Before turning on the detector, never fail to connect it to a grounding terminal. For stable operation of the detector and safety, it must be connected to a grounding terminal.
  • Page 35 4. How to Use 4-5. How to wire ● DV Specification Grounding bolt (M4) Bottom <How to Use Communication Connectors> When using the detector in combination with the pyrolyzer unit (PLU-70) (option) or GD-70D-EA, connect the detector to each of them by inserting a cable into a communication connector on the bottom of the main unit.
  • Page 36 4. How to Use 4-5. How to wire <Wiring Example> Connecting to the indicator (3-wire type - 4 - 20 mA/EA specification) GD-70D GD-70D-EA RM-5003, etc. +24V Power supply Connecting to the upper unit (DCS, PLC) (2-wire type - 4 - 20 mA/EA specification) GD-70D GD-70D-EA...
  • Page 37 4. How to Use 4-5. How to wire Connecting to a stabilized power supply (DV specification) GD-70D-DV Detector head Stabilized power supply 24 VDC 24 VDC (-) Connecting to the upper unit (PC, PLC) (Ethernet connection - EA specification) GD-70D-EA RJ45 connector Power supply (24 VDC)
  • Page 38 4. How to Use 4-5. How to wire Connecting to the upper unit (PC, PLC) (PoE connection - EA specification) GD-70D-EA RJ45 connector Upper unit (PC, PLC) Switching (with PoE function) Connecting to the upper unit (PLC, etc.) (DV specification) GD-70D-DV Detector head Upper unit...
  • Page 39 4. How to Use 4-5. How to wire Connecting to the upper unit (LN specification) GD-70D-LN Power supply (24 VDC) Upper unit (LON)

  • Page 40: How To Tube

    4. How to Use 4-6. How to tube 4-6. How to tube NOTE To use the pyrolyzer unit (PLU-70), see also the separate operating manual. The detector has an Rc1/4 thread inside of the sampling inlet/outlet (GAS IN, GAS OUT), to which “polypropylene”...
  • Page 41  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 42: 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 unit.  Connect the detector to a grounding circuit. ...

  • Page 43: Basic Operating Procedures

    5. How to Operate 5-2. Basic operating procedures 5-2. Basic operating procedures Normally, the detection mode is used for normal operations. (The detection mode is activated after the power is turned on.) PW: POWER ●: Lamp on The detector is <Detection Mode>...

  • Page 44: How To Activate The Detector

    5. How to Operate 5-3. How to activate the detector 5-3. How to activate the detector  Before turning on the power switch, check that the detector is installed properly.  The power switch is protected by a cover to prevent access to it in a normal time. To turn ON/OFF the power switch, rotate the switch cover.

  • Page 45: Modes

    5. How to Operate 5-4. Modes CAUTION  Do not turn off the detector during the initial clear. The detector is reading the sensor memory during the initial clear.  If a new sensor unit is installed or the sensor unit is replaced after the detector is started, the sensor unit must be warmed up for a specified period which is determined depending on the type of the sensor unit.
  • Page 46 5. How to Operate 5-4. Modes Detector temperature 2-7 TEMP Show the current temperature of the installation environment. Expected warm-up Show the expected warm-up completion for completion date/time WARMTIME semiconductor type (SGU) and hot-wire semiconductor type(SHU) Environmental Operation setting  setting 1 SETTING1 INHIBIT setting (INHIBIT)

  • Page 47: Detection Mode

    5. How to Operate 5-5. Detection mode 5-5. Detection mode <Flow Rate Indicator> Because the flow rate of the detector is automatically adjusted by the flow rate control function, the flow rate, in principal, does not need to be controlled. As shown on the figure below, when the flow rate does not correspond to the specified flow rate for some reasons, it is adjusted automatically.

  • Page 48: User Mode

    5. How to Operate 5-7. User mode ↓ ↓ ● ● ○ ○ First Alarm 5.0 ppm When the reading reaches the first TEST OFF alarm, the ALM1 lamp lights up. (When Contact ON is selected, the MAINTENANCE first alarm contact is activated.) ↓...
  • Page 49 5. How to Operate 5-7. User mode ↓↑ ▲ ▼ ● ○ ○ ○ → 1-4. ADDRESS 1- 4 Show the address. ADDRESS ADDRESS (NT specification), (DV specification) MAINTENANCE MAINTENANCE ↓↑ ▲ ▼ ● ○ ○ ○ → 1-5. 70D VER 1- 5 01234 Show the program...
  • Page 50 5. How to Operate 5-7. User mode ↓↑ ｜↑ ▲ ▼ A: Analog transmission ｜｜ E: Ethernet EA: Ethernet and analog COM SET ｜｜ transmission MAINTENANCE ▲↓↑▼ ｜｜ ｜｜ ▲ ▼ COM SET ｜｜ MAINTENANCE ↓｜ ● ○ ○ ○ →...
  • Page 51 5. How to Operate 5-7. User mode <Zero Adjustment "1-1"> This is used to perform the zero adjustment. Before starting the zero adjustment, let the detector draw the zero adjustment gas and wait until the reading is stabilized. For oxygen deficiency alarm specification (OSU - 0 - 25 vol%), "1-1" is the span adjustment. In this case, the fresh air adjustment is performed, so that fresh air must be introduced to adjust it to 20.9 vol%.
  • Page 52 5. How to Operate 5-7. User mode <Setting Display "1-2"> This is used to check the setting of typical menus. <Setting Display> ● ○ ○ ○ 1-2. CONFIRM 1- 2 Press SET key. CONFIRM MAINTENANCE ↓ ↓ ● ○ ○ ○...

  • Page 53: How To Exit

    5. How to Operate 5-8. How to exit 5-8. How to exit To turn off the detector, open the switch cover on the bottom of the main unit and turn "OFF" the power switch. Then, turn off the power supply (24 VDC) to the indicator/alarm unit. WARNING ...

  • Page 54: Operations And Functions

    6. Operations and Functions 6-1. Gas alarm activation Operations and Functions 6-1. Gas alarm activation Gas alarm: Triggered when the concentration of detected gas reaches or exceeds the alarm setpoint value. <Auto-Reset Operation> NOTE The alarm setpoint (first alarm and second alarm) is factory-set. Although the alarm delay time (standard: 2 seconds) works in the detector to prevent a false activation, it can be cancelled if not needed.
  • Page 55 6. Operations and Functions 6-1. Gas alarm activation "Alarm Pattern (L-H)" "Alarm Pattern (L-LL)" (* oxygen deficiency alarm)
  • Page 56 6. Operations and Functions 6-1. Gas alarm activation <Contact Activation（Self-latching）> In case of Self-latching setting, the contact is activated when the gas concentration reaches or exceeds the alarm setpoint value. The alarm indication lamp blinks during warning. It changes to a light after reset is performed.
  • Page 57 6. Operations and Functions 6-1. Gas alarm activation "Alarm Pattern (L-H)"...
  • Page 58 6. Operations and Functions 6-1. Gas alarm activation "Alarm Pattern (L-LL)"...

  • Page 59: Fault Alarm Activation

    After the detector is successfully returned from the fault, it restarts with the process normally performed right after it is turned on (initial clear). If the detector has problems and is repeatedly malfunctioning, contact RIKEN KEIKI immediately. * E-5 FLOW...

  • Page 60: External Output Operation

    6. Operations and Functions 6-3. External output operation 6-3. External output operation ● 4 - 20 mA/NT/EA Specification Specifications 4 - 20 mA (4 - 20 mA and EA) Power-line Ethernet (EA) communication system (NT) Signal Analog transmission 2-wire type DC Ethernet transmission (non-isolated)
  • Page 61 6. Operations and Functions 6-3. External output operation ● LN Specification Specifications LONWORKS (LN) Signal transmission LONWORKS method Transmission path KPEV-S Transmission rate 78kbps Transmission Max 2700m distance * When bus topology (Double ended termination ) is used. Connection load ―...
  • Page 62 6. Operations and Functions 6-3. External output operation <Communication Specifications> GD-70D-NT Power-line The detector is used in a local network formed with a multi-display unit communication (RM-70NT) as the base unit. For more information, see the operating system manual of the multi-display unit. GD-70D-EA Ethernet The detector offers functions that work in liaison with external software...

  • Page 63: Other Functions

    6. Operations and Functions 6-4. Other functions 6-4. Other functions <Suppression Function> Some types of sensor used with the detector are influenced by environmental changes (temperature, humidity, and other characteristics) or interference gases (interference characteristics) in no small measure, which affects the reading. Therefore, the reading might fluctuate around zero even at a normal state with no gas leakage.
  • Page 64 To correct the sensitivity variation of an individual sensor, you must make the regular span adjustment using calibration gas. <Calibration History/Alarm Trend History/Event History Functions> The detector and the sensor unit have their own history functions. To use these functions, please contact RIKEN KEIKI.
  • Page 65 6. Operations and Functions 6-4. Other functions <Sensor Unit Automatic Recognition Function> The detector has the function to automatically recognize the sensor unit when the sensor unit is replaced or the specification is changed. When a sensor unit with a different serial number or with a different principle or specification is attached, one of the following messages is displayed for helping the correct installation.

  • Page 66: About Lonworks (Ln Specification)

    6. Operations and Functions 6-5. About LONWORKS (LN specification) 6-5. About LONWORKS (LN specification) ＜Binding method＞ WARNING  When adjustment is completed, press the MODE key and be sure to return to detection mode. (When left in user mode, it automatically returns to detection mode after 10 hours.) ≪User mode≫...
  • Page 67 6. Operations and Functions 6-5. About LONWORKS (LN specification) GD-70D-LN LonWorks Diagram Open-lLoop Sensor Functional Block nvoConc SNVT_ppm_f nvoNstate SNVT_state Mandatory Implementation Specific nviReset SNVT_lev_disc nvoAlarmS SNVT_switch nvoFaultS SNVT_switch nvoGasName SNVT_str_asc nvoHertBeat SNVT_state nviComand nvoComand SNVT_str_asc SNVT_str_asc Virtual Function Block nciMaxSendTM SNVT_time_sec nciMinSendTM...
  • Page 68 6. Operations and Functions 6-5. About LONWORKS (LN specification) NO. Variable name Variable type Contents It is the same as the current density output. nvoConc SNVT_ppm_f Floating point of 16 BIT synchronizes with the display of the detection part. It is the same as the current density output.
  • Page 69 6. Operations and Functions 6-5. About LONWORKS (LN specification) You can select the transmission status with the setting point of nciMaxSendHBb(12) ・nciMaxSendHB (12) = Asec －－＞ (6) transmit every Asec. ・nciMaxSendHB (12) = 0sec －－＞ (6) don’t transmit every Asec. It outputs to nvoComand (14) for input data of nviComand (13).

  • Page 70: Maintenance

    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, please use our maintenance service.  Typical maintenance services are listed as follows. Please contact RIKEN KEIKI for more information.
  • Page 71 7. Maintenance 7-1. Maintenance intervals and items Main Services Power supply Checks the power supply voltage. check Verifies that the power lamp lights up. (Verifies that relevant points can be identified on the system.) (When a UPS (uninterruptible power system) is used, checks the operation with the UPS.) Concentration Verifies that the concentration display value is zero (or 20.9 vol% on the oxygen deficiency meter) by display check...

  • Page 72: Regular Maintenance Mode

    7. Maintenance 7-2. Regular maintenance mode 7-2. Regular maintenance mode WARNING After the adjustment is completed, never fail to press the MODE key to return to the detection mode. (If the detector remains in the regular maintenance mode, it automatically returns to the detection mode in ten hours.) Mode Item...
  • Page 73 7. Maintenance 7-2. Regular maintenance mode  Pump drive level diagnosis ON/OFF setting (PUMP CK) Pyrolyzer data display 2-11 PL When the pyrolyzer unit (PLU-70) is used, a variety of pyrolyzer data DATA is displayed. (See the operating manual for PLU-70) Fault investigation 2-12 FAULT Not used.
  • Page 74 7. Maintenance 7-2. Regular maintenance mode Regular Maintenance mode ● ○ ○ ○ → 2-0. GAS TEST 2- 0 0.2 ppm Perform a test with the gas. GAS TEST GAS TEST Similar to the detection mode, the reading changes MAINTENANCE MAINTENANCE and the alarm lamp lights ↓(Alternate Display)↑...
  • Page 75 7. Maintenance 7-2. Regular maintenance mode ● ○ ○ ○ 2-6. FLOW 2- 6 ⇔ Show the output and flow FLOW 0.50 L/M rate of the current pump. MAINTENANCE MAINTENANCE ↓↑ ▲ ▼ ● ○ ○ ○ 2- 7 → 2-7.
  • Page 76 7. Maintenance 7-2. Regular maintenance mode <Environmental Setting 1 "2-9"> In the environmental setting 1, specify the operation setting. <Environmental Setting 1> ● ○ ○ ○ 2-9. SETTING1 2- 9 Press SET key. SETTING1 MAINTENANCE ↓ ↓ ● ○ ○ ○...
  • Page 77 7. Maintenance 7-2. Regular maintenance mode ↓↑ ▲ ▼ To SET 0. INHIBIT Setting <Alarm Value Setting "2-9" - "SET 1"> <Alarm Value Setting> ● ○ ○ ○ SET 1. ALM P SET 1 Press SET key. ALM P MAINTENANCE ↓...
  • Page 78 7. Maintenance 7-2. Regular maintenance mode <Fault Alarm Test "2-9" - "SET 4"> ● ○ ○ ○ SET 4. F TEST SET 4 Press SET key. F TEST MAINTENANCE ↓ ↓ ● ○ ○ ○ Fault Alarm Test ON/OFF Select either ON/OFF. F TEST Switch ON and press the SET key to trigger the fault alarm.
  • Page 79 7. Maintenance 7-2. Regular maintenance mode ● ○ ○ ○ SET 2. SUPPRESS SET 2 0.9ppm ⇔ Set the suppression SUPPRESS SUPPRESS value. Change the value by MAINTENANCE MAINTENANCE pressing the ▲ or ▼ ↓↑ key, and then press the ▲...
  • Page 80 7. Maintenance 7-2. Regular maintenance mode ↓｜ ● ○ ○ ○ Energized/De-energize SET 6. RLY PTRN SET 6 ⇔ d Contact Setting Select either RLY PTRN => P84 energized/de-energized for the contact. MAINTENANCE ↓↑ ▲ ▼ ● ○ ○ ○ SET 7.
  • Page 81 7. Maintenance 7-2. Regular maintenance mode ● ○ ○ ○ SET 11. AT FLOW SET 11 ⇔ Set the flow rate AT FLOW AT FLOW auto-adjustment. Select either ON/OFF, and MAINTENANCE MAINTENANCE then press the SET key to ▲↓↑▼ confirm the selection. ｜↑...
  • Page 82 7. Maintenance 7-2. Regular maintenance mode ● ○ ○ ○ SET 15. MNT OUT SET 15 2.5 mA ⇔ Set the external output for MNT OUT MNT OUT the maintenance mode. Select either 2.5 mA/4.0 MAINTENANCE MAINTENANCE mA/HOLD (previous ▲↓↑▼ ｜↑...
  • Page 83 7. Maintenance 7-2. Regular maintenance mode ● ○ ○ ○ ETHERNET setting SET 18. ETHERNET SET 18 ⇔ Set Ethernet. => P85 ETHERNET MAINTENANCE ↓↑ ▲ ▼ ● ○ ○ ○ SET 19. PUMP CK SET 19 ⇔ Set the pump drive level PUMP CK PUMP CK diagnosis.
  • Page 84 7. Maintenance 7-2. Regular maintenance mode ● ○ ○ ○ Date Setting 12:00 Change the value by pressing the ▲ or ▼ key, and then press the 2009.01. SET key to confirm the value. MAINTENANCE ↓ ● ○ ○ ○ 12:00 Hour Setting Change the value by pressing the...
  • Page 85 7. Maintenance 7-2. Regular maintenance mode ↓ ↓ ● ○ ○ ○ Fault Alarm Contact ⇔ Setting ▲/▼ FLT RLY FLT RLY Select either nd (de-energized)/nE MAINTENANCE MAINTENANCE (energized), and then press the SET key to confirm the selection. (Press the MODE key to skip this menu.) ↓...
  • Page 86 7. Maintenance 7-2. Regular maintenance mode ↓↑ ▲ ▼ ● ○ ○ ○ IP Address Setting ⇔ Change the value by IP 1 IP 1 pressing the ▲ or ▼ key, and then press the MAINTENANCE MAINTENANCE SET key to confirm the ↓↑...
  • Page 87 7. Maintenance 7-2. Regular maintenance mode ↓↑ ▲ ▼ ● ○ ○ ○ DHCP Setting ⇔ Select either ON/OFF, DHCP DHCP and then press the SET key to confirm the MAINTENANCE MAINTENANCE selection. ▲↓↑▼ ｜↑ When ON is selected, an IP address is automatically obtained ｜｜...

  • Page 88: Calibration Method

    7. Maintenance 7-3. Calibration method 7-3. Calibration method Perform a calibration in each mode (67 mode and span adjustment mode) using the calibration gas.  Zero adjustment gas (collected in a gas sampling bag)  Calibration gas (collected in a gas sampling bag) ...
  • Page 89 7. Maintenance 7-3. Calibration method * When the zero adjustment fails ● ○ ○ ○ 0.0 ppm ZERO NG MAINTENANCE ↓ Return to 2-1. ZERO <Span Adjustment "2-2"> This is used to perform the span adjustment. For the oxygen deficiency alarm specification (OSU - 0 - 25 vol%), this is the same as "1-1".

  • Page 90: Other Adjustments/Cleaning Method

    7. Maintenance 7-4. Other adjustments/cleaning method ↓ ↓ ● ○ ○ ○ Adjustment Completed 8.0 ppm The menu returns to 2-2. SPAN SPAN END automatically. MAINTENANCE CAUTION ↓ Exhaust gas must be collected in the Return to 2-2. SPAN exhaust bag or discharged through the exhaust line.

  • Page 91: How To Replace Parts

    7. Maintenance 7-5. How to replace parts A1 A2 F ● ○ ○ ○ 2-5. DEF FLOW 2- 5 Press SET key. DEF FLOW MAINTENANCE ↓ ↓ ● ○ ○ ○ Flow Rate Adjustment/Default Set 1000 Adjust the flow rate by pressing the DEF FLOW ▲...
  • Page 92 7. Maintenance 7-5. How to replace parts When attaching the sensor unit to the main unit, thrust it onto the main unit and make sure that the sensor unit is securely fixed, otherwise it might come off. After replacing the sensor unit, close the front cover. Be sure to check the click of the front cover to fix it properly, otherwise it might open again.
  • Page 93 After the flow sensor is replaced, the operation must be checked by a qualified service engineer. For the stable operation of the flow sensor and safety, ask a qualified service engineer to take care of replacement of the parts that operation must be checked. Please contact RIKEN KEIKI.

  • Page 94: Storage, Relocation And Disposal

    CAUTION When using a relocated or stopped/stored alarm system again, never fail to perform calibration. For information on readjustment including calibration, please contact RIKEN KEIKI. 8-3. Disposal of products  Be sure to return a used sensor unit to our company, corporate sales division.

  • Page 95: Note

    8. Storage, Relocation and Disposal 8-3. Disposal of products  When disposing of the gas detector(ESU sensor unit only) in EU member states, sort the batteries as specified. Handle the removed batteries according to the classified refuse collection system and recycling system based on the regulations of EU member states.

  • Page 96: Troubleshooting

    Display does not Prepare another flow meter and perform the flow rate correspond to 0.5 default set again. L/min.) If such a symptom is observed frequently, the flow sensor is seemingly malfunctioning. Thus, it must be replaced. Please contact RIKEN KEIKI.
  • Page 97 9. Troubleshooting Symptom/Display FAULT Causes Actions Sensor unit ● The unit is not Check that the sensor unit is connected and the abnormalities connected or connectors of the unit are securely fastened. E-1 SENSOR improperly connected. Errors in Replace the sensor unit with a new one. communication with the unit Zero drift caused by...
  • Page 98 If such a symptom is observed repeatedly, the built-in clock is seemingly malfunctioning. Thus, it must be replaced. Please contact RIKEN KEIKI. System ● The rated voltage is Check the power supply, and supply the rated voltage.
  • Page 99 9. Troubleshooting Symptoms Causes Actions A gas alarm is triggered Presence of Disturbances by interference gases, such as solvents, despite of no gas leak and interference gas cannot be eliminated completely. For information on no other abnormalities at actions, such as removal filter, please contact RIKEN the detection point.

  • Page 100: Product Specifications

    10. Product Specifications 10-1. List of specifications Product Specifications 10-1. List of specifications <Common Specifications> Concentration display Character LCD (Digital and Bar Meter Display) Flow rate 0.5 L/min ±10% Power display POWER lamp on (green) Displays Gas name display/flow rate indicator/mode display/communication status display/pyrolyzer connection display Gas alarm display First: ALM1 lamp on (Red)/Second: ALM2 lamp on (Red)
  • Page 101 10. Product Specifications 10-1. List of specifications <Specifications for Each Model> Model GD-70D GD-70D-NT Transmission 3-wire type analog transmission 2-wire type DC power-line communication method (Common cable for power and signal <Power, Signal, Common>) or 2-wire type analog transmission Transmission 4 - 20 mA DC specifications (no-insulation/load resistance under 300 Ω)
  • Page 102 10. Product Specifications 10-1. List of specifications <Specifications for Each Principle> ESU + PLU *1 SSU + PLU *1 Detection Electrochemical type Pyrolysis-particle type principle Gas to be Toxic gas *2 NF3/COS Toxic gas *2 detected Detection range Depending on the gas to NF3: 0 - 30 ppm Depending on the gas to be be detected...
  • Page 103 10. Product Specifications 10-1. List of specifications Operating temperature 0 - 40ºC (at a constant condition) Operating humidities 95%RH or less (Non-condensing) *1 Pyrolyzer unit combination specification. For information on the specifications of the pyrolyzer unit (PLU-70), see the separate operating manual. *2 The operating temperature/humidity may be different depending on the gas to be detected.

  • Page 104: List Of Accessories

    10. Product Specifications 10-2. List of accessories 10-2. List of accessories  Operating manual  Protective rubber cap  Dedicated handling lever  Dust filter  Interference gas removal filter (to be supplied with sensor units for certain gases)  External connector for 5-pin communication (for DV specification only) 10-3.
  • Page 105 10. Product Specifications 10-3. Detection principle Special precautions for this principle The detector may be interfered by gases other than the gas to be detected, solvents, vapors, etc. Please note that the alarm may be triggered by interference. In addition, it may be fluctuated by environmental (temperature, humidity, etc.) changes in the installation site.
  • Page 106 10. Product Specifications 10-3. Detection principle Special precautions for this principle This detector may be interfered by gases other than the gas to be detected and vapors. Please note that the alarm may be triggered by interference. In addition, it may be fluctuated by environmental (temperature, humidity, etc.) changes in the installation site.
  • Page 107 Do not disassemble the pyrolysis-particle type sensor unit SSU-1925 in which SS-1925 is installed. Note 5) L-type packages can be handled by us and service companies we specify. Web site on the designing certification: http://www.nsr.go.jp/ 2-7-6 Azusawa Itabashi-ku Tokyo, 174-8744 Japan TEL 03-3966-1111 RIKEN KEIKI CO., LTD.
  • Page 108 10. Product Specifications 10-3. Detection principle Safety of the radioisotope Am (37 KBq) used in the pyrolysis-particle type sensor The pyrolysis-particle type sensor installed in the gas detector uses the radioisotope Am radiation source (18.5 KBq x 2 = 37 KBq). A specified designing certification device must satisfy the specified threshold for “1 cm dose equivalent rate at a point 10 cm away from the surface of the device”...
  • Page 109 10. Product Specifications 10-3. Detection principle <New Ceramic Type> When a combustible gas burns on the surface of a highly active new ceramic oxidation catalyst in catalytic combustion, the new ceramic-type sensor measures resultant temperature changes by measuring the resistance changes in the heat-resistant alloy wire coil. The sensor consists of two elements: A detecting element having a heat-resistant alloy wire coil with an ultrafine particle (new ceramic) oxidation catalyst sintered on it together with a carrier and a temperature-compensating element with a mixture of gas-inert alumina and glass sintered on it.
  • Page 110 10. Product Specifications 10-3. Detection principle <Semiconductor Type> Metal dioxide can measure gas concentration based on changes in the electric conductivity of semiconductor caused by gas adsorbed on its surface. RL: Load resistance, Vo: Output voltage VH: Heater voltage, Vs: Sensor voltage Special precautions for this principle This detector may be interfered by gases other than the gas to be detected and vapors.
  • Page 111 10. Product Specifications 10-3. Detection principle <Galvanic Cell Type> By immersing precious metal and lead in electrolyte and connecting them with a lead wire, a battery can be made (galvanic cell). When oxygen passes through the barrier, deoxidizing reaction occurs at the precious metal electrode while oxidizing reaction occurs at the lead electrode.
  • Page 112 10. Product Specifications 10-3. Detection principle <NDIR(Non-Dispersive Infrared Absorption) Type> IR light enters the cell and gas absorbs the beam, so the absorption rate and the gas concentration will correlate. The IR detector detects the IR light and will put it out as gas concentration. The band pass filter only lets specific wavelength that is absorbed by the target gas.
  • Page 113 10. Product Specifications 10-3. Detection principle <Hot-wire Semiconductor> The hot-wire semiconductor type sensor detects a change in resistance of the platinum wire coil integrated in a metal oxide semiconductor whose resistance value changes by contact with a gas as gas concentration. This is a highly sensitive gas detection sensor suitable for low concentrations.

  • Page 114: Definition Of Terms

    When the detector is used in a dusty environment, it is recommended that a dust filter should be attached to its outside. The filter is specified based on the gas to be detected. Please contact RIKEN KEIKI. vol% Gas concentration indicated in the unit of one-hundredth of the volume...
  • Page 115 11. Definition of Terms...
  • Page 116 11. Definition of Terms...
  • Page 117 11. Definition of Terms...

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