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New Cosmos Electric NV-100D Instruction Manual

1 point type toxic gas detection
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1 Point type Toxic Gas Detection /
Alarm System
Model NV-100D
Instruction Manual
●  Keep this instruction manual where it is readily accessible.
●  Thoroughly read this instruction manual before using the equipment so it can be used safely and correctly.
New-Cosmos Electric Co., Ltd.
Instruction manual No.
GAE-008-01
December 2004

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Summary of Contents for New Cosmos Electric NV-100D

  • Page 1 Instruction Manual ●  Keep this instruction manual where it is readily accessible. ●  Thoroughly read this instruction manual before using the equipment so it can be used safely and correctly. New-Cosmos Electric Co., Ltd. Instruction manual No. GAE-008-01 December 2004...

  • Page 2: Table Of Contents

    Table of Contents 1. Introduction ................................1 2. Safe Operation................................1 3. Unpacking................................2 4. System Structure ..............................3 5. Dimensions and Part Names..........................4 5-1 Indicator and Alarm Unit ..........................4 5-2 Gas Detector ..............................5 6. Installation and Wiring ............................6 6-1 How to Install the Indicator and Alarm Unit ....................6 6-2 How to Install the Gas Detector........................7 6-3 Wiring Method ..............................8 7.

  • Page 3: Introduction

    1. Introduction Thank you for purchasing a NV-100D single-point toxic gas detection /alarm system. This system is used to prevent leakage of toxic gas. This equipment continuously monitors for leakage of toxic gas, and indicates when a preset level has been exceeded by a lamp and sound.

  • Page 4: Unpacking

    Fuse 1A With a backup power source 2 pieces Part to embed the panel (embedded panel only) 1 set NV-100D instruction manual (this book) Test results of the equipment Options (separately sold) Rainproof cover KW-31 for a detector head KS-2D...

  • Page 5: System Structure

    This equipment consists of a part that detects gas (gas detector head) and a part that indicates gas concentration and sets off an alarm (indicator and alarm unit). The parts are connected by cables. Indicator and alarm unit NV-100D Power source AC100/240V (DC24V) Alarm...

  • Page 6: Dimensions And Part Names

    5. Dimensions and Part Names 5-1 Indicator and Alarm Unit 71.5 18 19 20 21 23 24 25 POWER ALARM BACKUP RESET A.SET BZ STOP TB BZ PA PB 2‑φ6 Fig. 2. Dimensions of the Indicator and Alarm Unit (without a backup power source) ＦＵＳＥ...

  • Page 7: Gas Detector

    Name Function This LCD bar graph meter with backlight indicates gas concentration and the Gas concentration preset alarm value. The peak value continues to blink even after the reading indicator value goes down after an alarm. It is green during normal operation and orange when the sensor failure. It Power lamp (POWER) blinks green when the equipment is turned on and also after a failure has been taken care of to show that the equipment is warming up.

  • Page 8: Installation And Wiring

    6. Installation and Wiring 6-1 How to Install the Indicator and Alarm Unit The equipment can be hang on the wall or embedded. WARNING The indicator and alarm unit is not an explosion-proof construction. Install it in a non-hazardous area. CAUTION The indicator and alarm unit must be installed in a place where someone is always present and is easy to read so that taking countermeasures and notifying others in case of an alarm is possible.

  • Page 9: How To Install The Gas Detector

    (2) How to embed on a panel 1. Cut out a rectangular opening in the panel as shown in Fig. 5. Fig. 5 Dimensions to Cut a Panel 2. Insert the equipment into the opening from front. Attach the backplate on back of the equipment using the attaching screws as shown in Fig. 6. Then, fasten it to the panel with fixing screws.

  • Page 10: Wiring Method

    6-3 Wiring Method Refer the gas detector’s instruction manual as well. WARNING Turn OFF the indicator and alarm unit’s power before opening the cover of the gas detector. Opening the cover when the power is on may cause a fire. Ground the equipment’s main body and gas detector.
  • Page 11 Control device External switch 外部スイッチ 制御機器 Upper 空 上段端子台 Idle terminal block Lower terminal 下段端子台 R(P) S(N) Idle 空 Idle 空 block 2Cｼｰﾙﾄﾞ shielded ｹｰﾌﾞﾙ cable Breaker 遮断器 ＋ − Analog output Diffusion gas detector ｱﾅﾛｸﾞ出力 拡散式ガス検知部 接地 Grounding KS-2D 4〜20mA KS‑2D (＋) (−)
  • Page 12 Control device External switch 制御機器 外部スイッチ Upper terminal 上段端子台 Idle 空 block Lower terminal 下段端子台 R(P) S(N) 空 空 Idle Idle block 5Cｼｰﾙﾄﾞ 5C shielded 又は cable or 4C 4Cｼｰﾙﾄﾞ shielded ｹｰﾌﾞﾙ cable Breaker 遮断器 − ＋ Analog output Suction gas detector ｱﾅﾛｸﾞ出力...

  • Page 13: Operating Instructions

    7. Operating Instructions 7-1 Notes to Users CAUTION Make sure that all parts are correctly connected before turning on the power. Check that the terminals of the gas detector and indicator and alarm unit are correctly connected. Do not connect a load to the external alarm contact that exceeds the rated capacity. 7-2 Procedures (1) Turning ON the power 1.
  • Page 14 (3) Setting alarms Alarm value is set as you specified at the time of delivery. If you want to change it, follow the procedures below. 1. Confirm that it is under the normal mode (Mode Switch 0) then press the Enter key. 2.

  • Page 15: Operation Of The Equipment

    3. Repeat procedures 1 and 2 several times until 4-20 mA(1-5V) is read. 7-3 Operation of the equipment (1) When gas is detected When gas concentration around the gas detector becomes high and the reading of the gas concentration indicating bar graph exceeds the first preset alarm value, the first Alarm lamp blinks and an alarm sound (four short beeps) is heard.

  • Page 16: When An Alarm Occurs

    Function switch Function Alarm sound Always ON Alarm sound ON/OFF Ten second alarm delay ON/OFF Zero suppression function ON/OFF Self-retention / Auto-restore Self-retention Auto-restore Trouble alarm : normally open / Normally Normally close open close − Heater disconnection alarm ON/OFF Always ON Flow decline alarm ON/OFF 7-4 When an Alarm Occurs...

  • Page 17: Maintenance Function

    Use auto zero and span adjustment daily for minor zero point and sensitivity corrections, and use analog zero and span adjustment for normal corrections. NV-100D has maintenance mode function. Select a mode using the Mode switch to use each function. Functions of modes are described in the following table.
  • Page 18 (1) Maintenance mode 1 Auto zero and span adjustment 1) Auto zero adjustment (Maintenance mode 1) ①  Set the Mode switch at 1 to select ②  Make sure that there is no gas around the maintenance mode 1. gas detector then press down the BZ STOP key until the Power lamp goes off.
  • Page 19 2) Auto span adjustment ①  Set the Mode switch at 1 to select ②  Set the auto span preset value (any maintenance mode 1. number between 10 and 100) using the Alarm Setting keys (△▽). POWER POWER ALARM BACKUP ALARM BACKUP RESET RESET...
  • Page 20 ⑦  Finally apply the calibration gas and check to see if the calibration concentration is indicated correctly POWER Check the ALARM BACKUP calibration concentration. RESET BZSTOP CAUTION Note that a gas leak alarm and external output will be generated when calibration gas is applied in normal mode.
  • Page 21 (2) Maintenance mode 2 Analog zero and span adjustment MEMO The maintenance mode 2 shows indications with the auto zero and span functions and the zero suppression function cancelled. Therefore, the indicated values in this mode may differ from those in normal mode. Always reset auto zero and span adjustment values during analog zero or span adjustment.
  • Page 22 ⑤  Set the Mode switch at zero to return to normal mode. POWER ALARM BACKUP Check to see if the RESET indicator reads 0. BZSTOP 2) Analog span adjustment CAUTION Always perform analog zero adjustment before doing analog span adjustment. Otherwise the span cannot be adjusted properly when the analog span adjustment is performed.
  • Page 23 ⑤  Confirm that the zero point is at zero and ⑥  Set the Mode switch at 2 to select apply calibration gas to the gas detector maintenance mode 2. for a minute. POWER POWER ALARM BACKUP ALARM BACKUP Peak hold value RESET RESET...

  • Page 24: Maintenance And Inspections

    ⑪  Set the Mode switch at zero to return to ⑫  Apply the calibration gas and check to normal mode. see if the gas concentration is indicated correctly. Make sure that POWER there is no gas Check the around the gas ALARM BACKUP calibration...

  • Page 25: Periodic Inspections

    Items to be inspected regularly and inspection methods Items to be inspected Inspection method 1. Zero point check • Make sure that there is no gas around the gas detector then check that the bar graph on the indicator reads zero. 2.

  • Page 26: Troubleshooting

    9. Troubleshooting Check the following before requesting repair work. Problem Cause Action Section to refer • The Power lamp does • Wires are not correctly • Check and fix wiring • Refer to 6-3. not light up even after connected. correctly.

  • Page 27: Specifications

    10. Specifications 10-1 Indicator and Alarm Unit Model NV-100D Principle of detection Controlled potential electrolysis Gases to be detected As specified. Indicating range As specified. Gas concentration indicator LCD bar graph meter with back light Standard preset alarm value As specified. (The value can be adjusted within measuring range.)

  • Page 28: Consumable Parts And Spare Parts

    11. Consumable Parts and Spare Parts Contact our dealer / agency when you need consumable parts and spare parts for NV-100. 12. Warranty New Cosmos Electric Company Limited warrants its gas detection products against any defects in materials and workmanship under normal use and operating conditions, for a period of one year from the date of purchase.

  • Page 29: Glossary

    14. Glossary Indicator / Alarm unit: A unit that receives signals from the gas detector and indicates gas concentration and alarms. Detector: A unit that detects gas concentration and converts it to electric signals. Backup power source device: A device that supplies power to the gas detector, indicator / alarm unit in order to maintain its performance during a power failure.
  • Page 30 Manual Revision History Edition No. Date Revisions GAE-008 March 2004 GAE-008-01 December 2004 Additional copies of this Operation Manual are available. Contact the following address for ordering information. Distributor: Manufacturer: New Cosmos Electric Co., Ltd. 2-5-4 Mitsuya-naka Yodogawa-ku Osaka 532-0036, Japan Phone 81-6-6309-1505 Fax 81-6-6308-0371 Email e-info@new-cosmos.co.jp...

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