Riken Keiki SD-D58-AC Operating Manual
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Riken Keiki SD-D58-AC Operating Manual

Riken Keiki SD-D58-AC Operating Manual

Ncw smart transmitter/gas detector head
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PT2E-2152
Smart Transmitter/Gas Detector Head
SD-D58•AC
SD-D58•DC
(TYPE NCW)
Operating Manual

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Summary of Contents for Riken Keiki SD-D58-AC

  • Page 1 PT2E-2152 Smart Transmitter/Gas Detector Head SD-D58•AC SD-D58•DC (TYPE NCW) Operating Manual...
  • Page 2 Operating Precautions This detector head is a gas detector that detects combustible gases in the air and triggers a gas alarm. The gas detector is a safety unit, not an analyzer or densitometer which performs quantitative/qualitative analysis/measurement for gases. Please fully understand the following points before using it, so that it can be used properly. This detector head may be interfered by gases other than the gas to be detected and vapors.

  • Page 3: Table Of Contents

    <Contents> 1. Outline of the Product........................4 1-1. Preface ..........................4 1-2. Purpose of use ........................4 1-3. Definition of DANGER, WARNING, CAUTION, and NOTE ..........4 1-4. Method of confirmation for standards and explosion proof specification ......5 2. Important Notices on Safety ......................6 2-1.

  • Page 4: Outline Of The Product

    1. Outline of the Product 1-1. Preface Outline of the Product 1-1. Preface Thank you for choosing our smart transmitter/gas detector head SD-D58 (TYPE NCW). Please check that the model number of the product you purchased is included in the specifications in this manual. This manual explains how to use the detector head and its specifications.

  • Page 5: Method Of Confirmation For Standards And Explosion Proof Specification

    1. Outline of the Product 1-4. Method of confirmation for standards and explosion proof specification 1-4. Method of confirmation for standards and explosion proof specification This detector head has different specifications depending on types of standards and/or explosion-proof certification. Check the specification of the detector head before using this.

  • Page 6: Important Notices On Safety

     Do not attempt to repair the detector head by the user.  For the lid, use hexagon socket head bolts specified by RIKEN KEIKI.  Always keep the driving part lid closed during use (except for maintenance). - 6 -...

  • Page 7: Warning Cases

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

  • Page 8: Precautions

    2. Important Notices on Safety 2-3. Precautions 2-3. Precautions CAUTION Do not use a transceiver or other radio wave transmitting device near the detector head. Radio wave from a transceiver etc. near the detector head or its cables may disturb commands. If a transceiver or other radio wave transmitting device is used, it must be used in a place where it disturbs nothing.

  • Page 9: Safety Information

    2. Important Notices on Safety 2-4. Safety information 2-4. Safety information Observe the followings to maintain an explosion-proof system. Outline of the product  This detector head is a fixed type smart transmitter/gas detector head which outputs a signal of 4 - 20 mA.
  • Page 10 2. Important Notices on Safety 2-4. Safety information <TIIS specifications> Specifications (Explosion-proof structure) Flame-proof enclosures (Explosion-proof class) Ex d ⅡB+H2 T4 (Ambient temperature) AC specification: -20 - +50°C DC specification: -20 - +53°C (Rating)  AC specification: 100 - 110 VAC Power supply 50/60 Hz 120 mA DC specification: 24 VDC 360 m A...

  • Page 11: Product Components

    3. Product Components 3-1. Main unit and standard accessories Product Components 3-1. Main unit and standard accessories <Main Unit> (including a cable gland) Gas outlet 4-φ7 (for M6) Display Gas outlet <Standard Accessories>  Operating manual  Dedicated handling lever ······ 1 pc ...
  • Page 12 3. Product Components 3-1. Main unit and standard accessories CAUTION  Use the supplied dedicated control key to operate the detector head. If products other than these accessories are used, key operations cannot be accepted properly.  Note that the control key is made of extremely strong magnet. Putting it close to a magnetic product, such as a credit card and ID card, may damage the stored data.

  • Page 13: Names And Functions For Each Part

    3. Product Components 3-2. Names and functions for each part 3-2. Names and functions for each part <Display> (5)Power lamp (6)Alarm lamp (7)Fault lamp (1)MENU/ESC key (3) key (10)Concentration value display (4) key (2)SET/ALM key (8)L range lamp (9)H range lamp Used to enter the maintenance mode.
  • Page 14 3. Product Components 3-2. Names and functions for each part <Inside> (Electric circuit part) (1) Terminal plate (for power input) (5) Fuse (2)Terminal plate (for contact/ transmission output) (3) Power switch (4) Grounding terminal Terminal plate (for power input) Power input terminal plate.*1 Terminal plate Terminal plate for alarm contact and gas (for contact/transmission output)
  • Page 15 3. Product Components 3-2. Names and functions for each part NOTE  Loosen the electric circuit part lid. The electric circuit shown above is located on the far side when the electric circuit part lid and the display unit are removed. Open Display unit Electric circuit...
  • Page 16 3. Product Components 3-2. Names and functions for each part <Inside> (Driving section) (3) Pump (2) Flow sensor (1) Gas sensor Gas sensor Sensor to detect gas. Flow sensor Sensor to detect the low flow rate. Pump Pump to draw gas. NOTE Loosen the hexagon socket head bolts located at the four corners of the driving part lid.

  • Page 17: Block Diagram

    3. Product Components 3-3. Block diagram 3-3. Block diagram <Electric Diagram> SD-D58 (TYPE NCW)•AC Suction pump Power supply part POWER INPUT (100 - 110 VAC) Power supply part POWER OUTPUT (24 VDC) Display (POWER) (ALM) (FAULT) Controller Seven-segment LED (CPU) Alarm contact controller (four-digit) Gas alarm contact...
  • Page 18 3. Product Components 3-3. Block diagram <Electric Diagram> SD-D58 (TYPE NCW)•DC Power supply part Suction pump POWER INPUT (24 VDC) Display (POWER) (ALM) (FAULT) Controller Seven-segment LED (CPU) Alarm contact controller (four-digit) Gas alarm contact (ALARM) Magnetic operation part Contact activation (MENU/ESC) () () (SET) •...

  • Page 19: How To Use

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

  • Page 20: Precautions For System Designing

    4. How to Use 4-3. Precautions for system designing Do not install the detector head in a place where maintenance of the detector cannot be performed or where handling the detector head involves dangers. Regular maintenance of the detector head must be performed. Do not install the detector head in a place where the equipment must be stopped when maintenance is performed in its inside, where parts of the equipment must be removed to perform maintenance, or where the detector head cannot be removed because tubes or racks prevent access to it.
  • Page 21 4. How to Use 4-3. Precautions for system designing Take appropriate measures in accordance with the importance of the facilities and the environment.  Provide protection by a lightning arrester (cable arrester). Protection against (Although inductive lightning surge can be transmitted through the cable, it is lightning prevented by installing a lightning arrester before the field devices and central processing equipment.

  • Page 22: How To Install

    4. How to Use 4-4. How to install 4-4. How to install <Installation Dimensions and Maintenance Space> Jig to rotate the lid The following installation requirements must be met to install the detector.  Attach the detector head on the wall and others using four M6 screws. CAUTION Do not install the detector in a place where maintenance of the detector cannot be performed or where handling the detector involves dangers.

  • Page 23: How To Wire

    4. How to Use 4-5. How to wire 4-5. How to wire WARNING  Do not put a metal object or other foreign substances inside the terminal box when attaching the electric circuit part lid.  Ignoring this may damage the device or impair the explosion-proof performance. ...
  • Page 24 4. How to Use 4-5. How to wire <TIIS Specifications> Cable outer diameter Rubber seal inner diameter Washer inner diameter Eccentric washer (mm) (mm) (mm) inner diameter (mm) 9.0 -9.6 10 14 9.8 9.6 -10.5 11 14 9.8 10.5 -11.0 11 14 11.8...
  • Page 25 4. How to Use 4-5. How to wire <Figure of Terminal Plate> SD-D58 (TYPE NCW)•AC Cont Cont Sig. Sig. 4 - 20mA 100 - 110 VAC Output Input SD-D58 (TYPE NCW)•DC Sig. Cont Cont 24 VDC 4 - 20mA Input Output * The above figure shows SD-D58 (TYPE NCW)•AC NOTE...
  • Page 26 4. How to Use 4-5. How to wire <Specifications of Terminal Plate> Specifications of terminal plate  Rated voltage: 250 VDC  Rated current: 12 A However, it depends on cables to be used. Connection conditions  Cable: 0.25 - 2.5 mm ...
  • Page 27 4. How to Use 4-5. How to wire <How to Connect to Terminal Plate> When cables are connected to the connectors, use the dedicated lever or a flathead screwdriver to do it as shown below. CAUTION  The right tools must be used. ...
  • Page 28 4. How to Use 4-5. How to wire <Attaching External Cable and Plug> When connecting a cable, put the cable through the cable gland, eccentric washer, washer and rubber seal in this order, and then screw in the cable gland to the main unit case and tighten the rubber seal. Plug Wind the sealing tape for about three times.
  • Page 29 4. How to Use 4-5. How to wire <Grounding> Connect the detector head to your grounding terminal with the external grounding terminal WARNING  Before turning on the detector head, never fail to connect it to a grounding terminal.  For stable operation of the detector head and safety, it must be connected to a grounding terminal.

  • Page 30: How To Tube

     To remove dust, never fail to attach the supplied dust filter in the middle of the tube.  It is needed to decide the length and material of the tube. Please contact RIKEN KEIKI for more information.  Do not use the detector head under an inert gas atmosphere. Flow rate cannot be detected accurately under the inert gas atmosphere including He.

  • Page 31: How To Operate

    5. How to Operate 5-1. Preparation for start-up How to Operate 5-1. Preparation for start-up Before connecting a power supply, read and understand the following precautions. Ignoring these precautions may cause an electric shock or damage the detector head.  Connect the detector head to a grounding circuit.

  • Page 32: How To Start The Gas Detector Head

    5. How to Operate 5-3. How to start the gas detector head WARNING When the detector head enters each mode from the detection mode while an alarm is activated, the alarm is released. 5-3. How to start the gas detector head ...

  • Page 33: Modes

    5. How to Operate 5-4. Modes 5-4. Modes Details on each mode are provided as follows. CAUTION Do not change the settings if not necessary. Changing the settings without understanding the specifications may cause malfunctions. - 33 -...
  • Page 34 5. How to Operate 5-4. Modes Mode Item Details Display Detection mode — concentr Normal state ation Display the program version and others. ROM/SUM display This is not typically used by the user. Zero adjustment Perform the zero adjustment. Maintenance mode (User) Setting display Display various setting values.

  • Page 35: Maintenance Mode (User Mode)

    5. How to Operate 5-5. Maintenance mode (User mode) 5-5. Maintenance mode (User mode) WARNING After the adjustment is completed, never fail to press MENU/ESC key to return to the detection mode. (If the detector head remains in the maintenance mode, it automatically returns to the detection mode in ten hours.) ...
  • Page 36 5. How to Operate 5-5. Maintenance mode (User mode) <Zero Adjustment "1-1"> This is used to perform the zero adjustment.      1- 1 Press SET key.        Current concentration value display Press the SET key to perform the zero adjustment.
  • Page 37 5. How to Operate 5-5. Maintenance mode (User mode) <Setting Display "1-2">> Shows various setting values.      1-2. 1- 2 Press the SET key.       Alarm setpoint display 25.0 Example: 25%LEL ...

  • Page 38: How To Exit

    5. How to Operate 5-6. How to exit 5-6. How to exit  Turn off the power switch of the indicator/alarm unit.  Stop the power supply to the detector head.  Open the electric circuit part lid.*  Turn OFF the power switch of the detector head.* ...

  • Page 39: Operations And Functions

    6. Operations and Functions 6-1. Gas alarm activation Operations and Functions 6-1. Gas alarm activation Gas alarm: Activated when the concentration of detected gas reaches or exceeds the alarm setpoint value. <Auto-Reset> NOTE The alarm setpoint is factory-set. Although the alarm delay time (standard: 2 seconds) works in the detector head to prevent a false activation, it can be cancelled if not needed.

  • Page 40: Fault Alarm Activation

    After the detector head is successfully returned from the fault, it restarts with the process normally performed right after it is turned on (initial clear). If the detector head has problems and is repeatedly malfunctioning, contact RIKEN KEIKI immediately. NOTE For information on malfunctions (error messages), see "9.

  • Page 41: External Output Operation

    6. Operations and Functions 6-4. External output operation NOTE A low flow rate abnormality can be a cause of fault alarm contact output. For information on malfunctions (error messages), see "9. Troubleshooting". 6-4. External output operation Signal transmission method Electric current transmission (non-isolated) 4 – 20 mA Transmission path CVVS Transmission distance...
  • Page 42 6. Operations and Functions 6-4. External output operation Example of gas concentration and external output <SD-D58 (TYPE NCW)> External output 4 - 16 mA (L range)/ 16 - 20 mA (H range) setting 22 mA 20 mA Detection Mode 16 mA Maintenance Mode 4 mA 2.5 mA...

  • Page 43: Other Functions

    6. Operations and Functions 6-5. Other functions NOTE SD-D58 (TYPE NCW) offers two reading ranges (L range and H range). If the displayed combustible gas concentration rises above the full scale of the L range, the display is automatically switched to the H range. On the other hand, if the gas concentration drops below the full scale of the L range, the display is automatically switched back to the H range.

  • Page 44: Maintenance

    7. Maintenance 7-1. Maintenance intervals and items Maintenance The detector head is an important instrument for the purpose of safety. To maintain the performance of the detector head and improve the reliability of safety, perform a regular maintenance. Continuing to use the detector without performing maintenance will compromise the sensitivity of the gas sensor, thus resulting in inaccurate detection.
  • Page 45 7. Maintenance 7-1. Maintenance intervals and items  Typical maintenance services are listed as follows. Please contact RIKEN KEIKI for more information. Main services Power supply check : Checks the power supply voltage. Verifies that the power lamp lights up.

  • Page 46: Maintenance Node (Regular Maintenance Mode)

    7. Maintenance 7-2. Maintenance node (Regular maintenance mode) 7-2. Maintenance node (Regular maintenance mode) WARNING After the adjustment is completed, never fail to press MENU/ESC key to return to the detection mode. (If the buzzer unit remains in the maintenance mode, it automatically returns to the detection mode in ten hours.) Mode Item...
  • Page 47 7. Maintenance 7-2. Maintenance node (Regular maintenance mode)      User mode 1- 3 In "1-3.", press the SET key.        Then hold the SET key again ---- for three seconds. ...
  • Page 48 7. Maintenance 7-2. Maintenance node (Regular maintenance mode)       Flow sensor settings 2-6. Flow sensor settings P57 Set the flow sensor function. 2-6.0, 2-6.5 to 2-6.6 and  2-6.8 to 2-6.9 are   factory-set. They are not typically used by the user.
  • Page 49 7. Maintenance 7-2. Maintenance node (Regular maintenance mode) <Test mode "2-0">      Press the SET key.           Gas test P50 2-0.0 Gas test 2-0.0    ...
  • Page 50 7. Maintenance 7-2. Maintenance node (Regular maintenance mode) <Gas Test "2-0.0">      2-0.0 2-0.0 Press the SET key.   Introduce the test gas and perform the      gas test.   ...
  • Page 51 7. Maintenance 7-2. Maintenance node (Regular maintenance mode) <Fault Test "2-0.2">      2-0.2 2-0.2 Press the SET key.        Fault test ON/OFF Select either ON/OFF. Switch ON and press the SET key to trigger the fault alarm.
  • Page 52 7. Maintenance 7-2. Maintenance node (Regular maintenance mode) <Memory Test "2-0.4">      2-0.4 2-0.4 Press the SET key.   When StA. is displayed, press the SET      StA. key again.  When CAL.
  • Page 53 7. Maintenance 7-2. Maintenance node (Regular maintenance mode) <Environmental Setting "2-4"> Set various operations and functions in the environmental setting. <Environmental Setting 1>      2-4. Environmental Setting 2- 4 Press the SET key.    ...

  • Page 54: Gas Calibration Method

    7. Maintenance 7-3. Gas calibration Method 7-3. Gas calibration Method Perform a gas calibration in each mode (zero adjustment mode and span adjustment mode) using the calibration gas. <SD-D58>  Zero adjustment gas  OUT IN  Exhaust Calibration gas (collected in a gas sampling bag) sampling ...
  • Page 55 7. Maintenance 7-3. Gas calibration Method <Span Adjustment "2-2"> This is used to perform the span adjustment. CAUTION Before starting the span adjustment, provide the detector with the calibration gas and wait until the indicator is stabilized.    ...
  • Page 56 If there are mistakes, perform the span adjustment again.  If the span adjustment cannot be performed even when there is no mistake or after the correction, the gas sensor life has expired. After turning off the power supply, please contact RIKEN KEIKI. - 56 -...
  • Page 57 7. Maintenance 7-3. Gas calibration Method <Flow sensor settings "2-6"> <Flow rate zero adjustment "2-6.1"> This is used to perform the zero adjustment on the flow sensor. CAUTION Before starting the zero adjustment of the flow sensor, remove the pump and wait until the flow sensor output is stabilized.
  • Page 58 7. Maintenance 7-3. Gas calibration Method <Low Flow Rate Threshold Value Setting "2-6.2"> This is used to set the threshold value for low flow rate. CAUTION Set the threshold value for low flow rate to one of the symbols ("a" to "e") printed on the flow sensor. If any other setting is used, the low flow rate function may not operate correctly.
  • Page 59 7. Maintenance 7-3. Gas calibration Method <Flow Sensor Operation Start Setting "2-6.7"> This is used to set the flow sensor operation start. CAUTION  Make this setting only once at the operation start of the flow sensor.  Make this setting after conducting the flow rate zero adjustment and setting the threshold value. ...

  • Page 60: How To Maintain Flow Sensor

    7. Maintenance 7-4. How to maintain flow sensor 7-4. How to maintain flow sensor Remove the pump.       2-6.3 Flow sensor zero check 2- 6.3 Press the SET key.       ...

  • Page 61: Parts Replacement

    * The operation must be checked after replacement by a qualified service engineer. For the stable operation of the detector and safety, ask a qualified service engineer to take care of replacement of the parts. Request RIKEN KEIKI for operation check. NOTE The above replacement interval is recommendation only.

  • Page 62: Storage, Relocation And Disposal

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

  • Page 63: Troubleshooting

    If the detector shows a symptom which is not explained in this manual, or still has malfunctions even though remedial actions are taken, please contact RIKEN KEIKI. <Abnormalities on Unit>...
  • Page 64 9. Troubleshooting <Abnormalities of Readings> Symptoms Causes Actions Drifting of sensor output Perform the zero adjustment. Disturbances by interference gases, such as solvents, Presence of interference cannot be eliminated completely. For information on actions, such as removal filter, please contact RIKEN The reading rises KEIKI.

  • Page 65: Product Specifications

    10. Product Specifications 10-1. List of specifications Product Specifications 10-1. List of specifications [SD-D58 (TYPE NCW)•DC] <ATEX specification> Detection principle New ceramic Gas to be detected Combustible gas Concentration display Seven-segment LED (four-digit) Detection method Sample-drawing Flow rate 1.0 L/min or more (under the maximum suction pressure of 5.0 kPa<gauge pressure>) Alarm setpoint Depending on the gas to be detected...
  • Page 66 10. Product Specifications 10-1. List of specifications Tube connecting hole Rc1/8 (O.D 8-1t, half union for Cu tube <Bs> attached or half union for SUS tube <SUS> attached) Operating temperatures -20 - 53°C (at a constant condition) Operating humidity Below 95% RH (Non-condensing) Structure Wall mounting type (2B <50A>, pipe attachable), Drip-proof and dust-proof performances (compliant to IP67 level)
  • Page 67 10. Product Specifications 10-1. List of specifications [SD-D58 (TYPE NCW)•AC] <TIIS specification> Detection principle New ceramic Gas to be detected Combustible gas Concentration display Seven-segment LED (four-digit) Detection method Sample-drawing Flow rate 1.5 L/min or more (under the maximum suction pressure of 5.3 kPa<gauge pressure>) Alarm setpoint value Depending on the gas to be detected...
  • Page 68 10. Product Specifications 10-1. List of specifications [SD-D58 (TYPE NCW)•DC] <TIIS specification> Detection principle New ceramic Gas to be detected Combustible gas Concentration display Seven-segment LED (four-digit) Detection method Sample-drawing Flow rate 1.0 L/min or more (under the maximum suction pressure of 5.0 kPa<gauge pressure>) Alarm setpoint value Depending on the gas to be detected...

  • Page 69: Detection Principle

    10. Product Specifications 10-2. Detection principle 10-2. Detection principle [New ceramic] 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.
  • Page 70 10. Product Specifications 10-2. Detection principle [Flow sensor] A circuit is equipped to pick out the contact output when the flow rate becomes under the specified rate. The flow sensor is a hot-wire type where the detecting element, the compensating element and the fixed resistance consist a Wheatstone bridge.

  • Page 71: Definition Of Terms

    11. Definition of Terms Definition of Terms This is a principle of the sensor installed in the Type NCW. New ceramic See "10-2. Detection principle" for details. Output from the detector head fluctuates for a while after turning on the power. Initial clear This is a function to prevent triggering alarm during that time.
  • Page 72 11. Definition of Terms 10-2. Detection principle - 72 -...

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