Riken Keiki PT0E-1495 Operating Manual
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Riken Keiki PT0E-1495 Operating Manual

Portable combustible gas detector
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PT0E-1495
Portable
Combustible Gas Detector
NP-1000
Operating Manual
(PT0-149)

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Summary of Contents for Riken Keiki PT0E-1495

  • Page 1 PT0E-1495 Portable Combustible Gas Detector NP-1000 Operating Manual (PT0-149)

  • Page 2: Table Of Contents

    Contents 1. Outline of the Product ............................. 4 Preface ................................ 4 Purpose of use ............................4 Definition of DANGER, WARNING, CAUTION and NOTE ................ 4 2. Important Notices on Safety ........................... 5 2-1. Danger cases ............................5 2-2. Warning cases ............................. 5 2-3.
  • Page 3 10. Storage and Disposal ..........................73 10-1. Procedures to store the gas detector or leave it for a long time ............. 73 10-2. Procedures to use the gas detector again ..................73 10-3. Disposal of products ........................73 11. Troubleshooting ............................75 11-1.

  • Page 4: Outline Of The Product

    1. Outline of the Product Preface Outline of the Product Preface Thank you for choosing our portable combustible gas detector NP-1000 (hereinafter referred to as the gas detector). Please check that the model number of the product you purchased is included in the specifications on this manual.

  • Page 5: Important Notices On Safety

    2. Important Notices on Safety 2-1. Danger cases Important Notices on Safety To maintain the performance and use the gas detector safely, observe the following instructions of DANGER, WARNING and CAUTION. 2-1. Danger cases DANGER About use • While conducting measurement in a confined space such as inside of the gas storage tank and pipeline, do not lean over or look into the gas storage tank or pipeline.

  • Page 6: Precautions

    2. Important Notices on Safety 2-3. Precautions WARNING Others • Do not throw the gas detector into fire. • Do not wash the gas detector in a washing machine or ultrasonic cleaner. • Do not block the buzzer sound opening. No alarm sound can be heard. •...
  • Page 7 • If the gas detector is not used for a long time, store it after removing the batteries. Battery leaks may result in fire, injury, etc. When the gas detector is used again after a long-period storage, never fail to perform air calibration. For information on readjustment including air calibration, please contact RIKEN KEIKI. - 7 -...

  • Page 8: Safety Information

    How to read A: Manufacturing year (0-9) instruction B: Manufacturing month (1-9, XYZ for Oct.-Dec.) number C: Manufacturing lot D: Serial number E: Factory code Manufacturer RIKEN KEIKI CO., LTD. 2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744 Japan Web site: https://www.rikenkeiki.co.jp/ - 8 -...

  • Page 9: Product Components

    3-1. Main unit and standard accessories After opening the carton box, check the gas detector and accessories. If there is anything missing, contact RIKEN KEIKI. Main unit For names and functions of individual parts of the gas detector and LCD display, see "Names and functions for each part"...
  • Page 10 3. Product Components 3-1. Main unit and standard accessories DANGER About explosion-proof • Do not modify or change the circuit, structure, etc. • When using the gas detector in a hazardous area, take the following countermeasures for preventing dangers resulting from electrostatic charges. (1) Wear anti-static clothes and conductive shoes (anti-static work shoes).

  • Page 11: 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 This section describes names and functions of main unit and battery unit parts and LCD display. <Exterior of Main Unit> (8) Gas inlet (9) Gas outlet (3) Alarm lamp window...
  • Page 12 3. Product Components 3-2. Names and functions for each part <LCD Display> (1) Pilot indicator (2) Flow check display (5) Gas name (3) Range mode (6) Concentration display and unit display (4) Battery level (7) Full scale icon and bar display (8) Clock display Name Function...
  • Page 13 3. Product Components 3-2. Names and functions for each part Gas sampling probe and gas sampling hose (1) Gas sampling probe (3) Hose (2) Gas sampling clamp coupler hose Name Function Placed in a detection area to collect a gas. Gas sampling probe The probe includes a dust filter.

  • Page 14: 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 gas detector must follow the operating precautions. Ignoring the precautions may damage the unit, resulting in inaccurate gas measurement.
  • Page 15 4. How to Use 4-2. Preparation for start-up Remove old batteries and Battery then put new batteries while observing the correct polarity. Close the battery cover and lock it. The lock clicks. DANGER • The conditions for the explosion-proof standard of the gas detector include the use of TOSHIBA batteries.
  • Page 16 (hose clamp coupler) Main unit CAUTION • Use only a gas sampling hose specified by RIKEN KEIKI. • Use the gas detector with the gas sampling probe connected to the gas sampling hose so that no foreign substance is drawn into it.

  • Page 17: How To Start The Gas Detector

    4. How to Use 4-3. How to start the gas detector 4-3. How to start the gas detector When the power is turned on, a self-diagnostic starts, and then the gas detector enters the detection mode. Power-on Press and hold the POWER button until the buzzer blips (three seconds or longer) to turn on the power. When the power is turned on, the LCD display changes automatically as shown below, and the gas detector enters the detection mode.
  • Page 18 4. How to Use 4-3. How to start the gas detector ▼ Full scale Display example: Display 100 vol% ▼ WARNING Setting display Display in setting alarm (P. 34) Display example: 50 vol% ▼ ▼ ALARM Setting display Display in setting alarm (P. 34) Display example: 50 vol% ▼...
  • Page 19 • The range mode used at the last power off is retained. • If there is an abnormality in the built-in clock, a fault alarm FAIL CLOCK may be triggered. In this case, contact RIKEN KEIKI immediately. - 19 -...

  • Page 20: Basic Operating Procedures

    RESET button after removing the cause of low flow rate. For other fault alarms, turn off the power and then promptly contact RIKEN KEIKI. • The backlight goes off after 30 seconds or so of no operation. It lights up continuously while an alarm is activated.

  • Page 21: Performing Air Calibration

    4. How to Use 4-5. Performing air calibration 4-5. Performing air calibration Perform air calibration after checking the following points at maintenance before starting work or if the zero point deviates even though fresh air is drawn. <Performing Air Calibration in Surrounding Atmosphere> Check that the surrounding air is fresh.
  • Page 22 4. How to Use 4-5. Performing air calibration NOTE • Perform air calibration under the pressure and temperature/humidity conditions close to those in the operating environment or in the fresh air. • Perform air calibration after the reading is stabilized. •...

  • Page 23: How To Detect

    4. How to Use 4-6. How to detect 4-6. How to detect When the preparation for start-up and air calibration have been completed, put the probe close to the detection area in the detection mode and perform gas detection. Reading display (example) ･...
  • Page 24 4. How to Use 4-6. How to detect NOTE • Use only a gas sampling hose specified by RIKEN KEIKI. • Use the gas detector with the gas sampling probe connected so that no foreign substance is drawn into it.

  • Page 25: Switching Range Mode

    4. How to Use 4-7. Switching range mode 4-7. Switching range mode The range mode can be switched between “Lo” (low range, fixed to 0 - 10.0 vol%), “Auto” (automatic range switching) and “Hi” (high range, fixed to 0 - 100 vol%) to use the gas detector. With “Auto”...

  • Page 26: Snap Logger

    4. How to Use 4-8. Snap logger 4-8. Snap logger Any instantaneous value during measurement can be recorded. Up to 256 points of data can be recorded. When the number of recorded data points reaches the maximum, recorded data will be overwritten, starting from the oldest data. LCD display Press the ▼...

  • Page 27: Power-Off

    4. How to Use 4-9. Power-off Press the ENTER button. The record is saved and the detection mode returns. ▼ 4-9. Power-off Press and hold the POWER button (at least three seconds) until the buzzer blips four times ("TURN OFF" disappears) to turn off the power.

  • Page 28: How To Set Display Mode

    5. How to Set Display Mode 5-1. Entering the display mode How to Set Display Mode 5-1. Entering the display mode This mode allows users to view and change various display settings and perform other operation. LCD display In the detection mode, press the DISPLAY button.
  • Page 29 5. How to Set Display Mode 5-1. Entering the display mode Display mode overview LCD display Item Details Peak display Displays the maximum concentration detected during the period from power- on to the point of checking. * To clear the peak display, hold down the RESET button until "CLEAR - RELEASE"...
  • Page 30 5. How to Set Display Mode 5-1. Entering the display mode Entering user mode Enters the user mode. (P. 40) Detection mode Returns to the detection mode. - 30 -...

  • Page 31: Concentration Displayed Gas Reading Setting (Base)

    5. How to Set Display Mode 5-2. Concentration displayed gas reading setting (base) 5-2. Concentration displayed gas reading setting (base) The concentration display of the gas detector depends on the specification; however, a pre-registered gas can be read instead to display its concentration. LCD display Press the ENTER button.
  • Page 32 5. How to Set Display Mode 5-2. Concentration displayed gas reading setting (base) Select a gas name to read with the ▼/▲ button and then ▲ press the ENTER ▼ button. * The gas reading setting will be ▼ cleared at power-off. After "END"...
  • Page 33 5. How to Set Display Mode 5-2. Concentration displayed gas reading setting (base) NP-1000 gas list Symbol Reading Methane ○ Propane C3H8 ○ Isobutane i-C4H10 ○ Argon ○ Helium ○ Hydrogen × NOTE • Argon (Ar) and Helium (He) in the above list are not categorized as combustible gas generally; however, they are handled by a combustible gas detector in explosion-proof certification.

  • Page 34: Alarm Setpoint Display

    5. How to Set Display Mode 5-3. Alarm setpoint display 5-3. Alarm setpoint display An alarm setpoint can be displayed and activation test can be performed. LCD display ▼ Press the ENTER button. The alarm setpoint display appears. ▼ * Press the DISPLAY button to cancel the operation.
  • Page 35 5. How to Set Display Mode 5-3. Alarm setpoint display * Press the ENTER button to test the selected alarm activation. Press any button to reset the alarm. ▼ ▲ Press the DISPLAY button. The gas detector returns to the display mode menu.

  • Page 36: Pump Suction Volume Setting

    5. How to Set Display Mode 5-4. Pump suction volume setting 5-4. Pump suction volume setting The pump suction volume can be set to L (Low: Suction volume <low>) or H (High: Suction volume <high>). LCD display ▼ Press the ENTER button.
  • Page 37 5. How to Set Display Mode 5-4. Pump suction volume setting After "END" is displayed, the gas detector returns to the display mode menu. ▼ NOTE • When the gas detector is restarted, the pump suction volume is set to L (suction volume <low>). - 37 -...

  • Page 38: Log Data Display

    5. How to Set Display Mode 5-5. Log data display 5-5. Log data display The data recorded by the snap logger can be viewed. LCD display ▼ Press the ENTER button. The gas detector enters the log data display. ▼ * Press the DISPLAY button to cancel the operation.
  • Page 39 5. How to Set Display Mode 5-5. Log data display The contents of the selected log (gas name and base record) are displayed in order. When a log is not recorded, “NO DATA” is displayed. ▼ Press the DISPLAY button to exit. The gas detector returns to the display mode menu.

  • Page 40: How To Set User Mode

    6. How to Set User Mode 6-1. Entering the user mode How to Set User Mode 6-1. Entering the user mode The maintenance including internal clock correction, etc. can be performed. LCD display In the detection mode, press the DISPLAY button six times to display the user mode entry.
  • Page 41 6. How to Set User Mode 6-1. Entering the user mode NOTE • The backlight goes off after 30 seconds or so of no operation. - 41 -...
  • Page 42 6. How to Set User Mode 6-1. Entering the user mode User mode overview Item Details LCD display Peak bar display setting Turns on/off the display of blinking bar graph for the maximum concentration detected during the period from power- on to the point of checking on the bar graph.

  • Page 43: Peak Bar Display Setting

    6. How to Set User Mode 6-2. Peak bar display setting 6-2. Peak bar display setting A peak of the detected gas concentration can be displayed on the bar. LCD display Press the ENTER button. The gas detector enters the peak bar display setting mode.
  • Page 44 6. How to Set User Mode 6-2. Peak bar display setting - 44 -...

  • Page 45: Date/Time Setting

    6. How to Set User Mode 6-3. Date/time setting 6-3. Date/time setting Set the date/time of the internal clock. LCD Display Press the ENTER button. The gas detector enters the date/time setting. Adjust the date/time with the ▲/▼ button and press the ENTER button.

  • Page 46: Alarm Setpoint Setting

    6. How to Set User Mode 6-4. Alarm setpoint setting 6-4. Alarm setpoint setting Set the alarm function to ON/OFF and specify an alarm setpoint. LCD display Press the ENTER button. The gas detector enters the alarm setpoint setting mode. Enable <on>...
  • Page 47 6. How to Set User Mode 6-4. Alarm setpoint setting Set the second alarm setpoint with the ▼/▲ button and then press * Set the second alarm setpoint within the following range. the ENTER button. Hi: First alarm setpoint to 100 ▼...

  • Page 48: Calibration

    . Calibration 7-1. Preparation for air and N2/CO2 calibrations Calibration 7-1. Preparation for air and N2/CO2 calibrations Prepare the following before performing maintenance such as a bump test and air calibration. Preparation for air calibration Perform air calibration at maintenance before starting work or if the zero point deviates even though fresh air is drawn.
  • Page 49 . Calibration 7-1. Preparation for air and N2/CO2 calibrations CAUTION • Do not use a lighter gas to check the sensitivity of the gas detector. A constituent of the lighter gas may deteriorate the sensor performances. - 49 -...

  • Page 50: Entering Calibration Mode

    . Calibration 7-2. Entering calibration mode 7-2. Entering calibration mode The maintenance including bump test and air calibration can be performed. LCD display In the detection mode, hold down the ▼ and DISPLAY buttons. The bump test screen in the calibration mode is displayed.
  • Page 51 . Calibration 7-2. Entering calibration mode Calibration mode overview LCD display Item Details Bump test The function is tested using a test gas. (P. 53) Air calibration Perform air calibration (zero adjustment). (P. 55) N2 calibration CO2 calibration Auto calibration Preset the concentration value of the prepared calibration gas in the gas detector to enable automatic adjustment...
  • Page 52 . Calibration 7-2. Entering calibration mode One calibration Perform manual adjustment to the concentration value of the prepared calibration gas. (P. 60) Bump test condition Set the bump test operating conditions. setting (P. 62) Password setting Set a password used to protect the entry to the calibration mode.

  • Page 53: Bump Test (Base Gas: N2)

    . Calibration 7-3. Bump test (base gas: N2) 7-3. Bump test (base gas: N2) The function is tested using a test gas. The result will be displayed as "P" (PASS) or "F" (Failure). If the function is diagnosed as "F" (Failure), perform span calibration, etc. The bump test may not be displayed depending on the factory default setting.
  • Page 54 . Calibration 7-3. Bump test (base gas: N2) Press the ENTER button. After the result of the bump test is displayed, the * FF: Fail gas detector returns to the calibration mode menu. - 54 -...

  • Page 55: Air Calibration

    . Calibration 7-4. Air calibration 7-4. Air calibration Perform the air calibration. LCD display Press the ENTER button. The gas detector enters the air calibration mode. Hold down the AIR button. Release the AIR button when the display changes from "AirCL - HOLD AIR"...

  • Page 56: N2 Calibration

    . Calibration 7-5. N2 calibration 7-5. N2 calibration Perform nitrogen (N2) calibration. The function is tested using a test gas. LCD display Press the ENTER button. The gas detector enters the N2 calibration mode. Supply a test gas and press the ENTER button.

  • Page 57: Co2 Calibration

    . Calibration 7-6. CO2 calibration 7-6. CO2 calibration Perform carbon dioxide (CO2) calibration. The function is tested using a test gas. LCD display Press the ENTER button. The gas detector enters the CO2 calibration mode. Supply a test gas and press the ENTER button.

  • Page 58: Auto Cal (Base Gas: N2)

    . Calibration 7-7. AUTO CAL (base gas: N2) 7-7. AUTO CAL (base gas: N2) This is how to preset the concentration value of the prepared calibration gas in the gas detector and perform calibration in a single step. AUTO CAL may not be displayed depending on the factory default setting. LCD display Press the ENTER button.
  • Page 59 . Calibration 7-7. AUTO CAL (base gas: N2) * If span calibration fails, "FAIL" is displayed. Press the RESET button to reset the alarm. ▼ After span adjustment, the gas detector returns to the gas concentration display. ▼ After "END" is displayed, the gas detector returns to the calibration mode menu.

  • Page 60: One Cal

    . Calibration 7-8. ONE CAL 7-8. ONE CAL This is how to perform calibration with manually set to the concentration value of the prepared calibration gas. ONE CAL may not be displayed depending on the factory default setting. LCD display Press the ENTER button.
  • Page 61 . Calibration 7-8. ONE CAL After span adjustment, "END" is displayed and then the gas detector returns to the calibration mode menu. (Buzzer sound: Once <blip>) Stop supplying the calibration gas. - 61 -...

  • Page 62: Bump Test Condition Setting

    . Calibration 7-9. Bump test condition setting 7-9. Bump test condition setting Various conditions for conducting a bump test can be set. The bump test condition setting may not be displayed depending on the factory default setting. LCD display Press the ENTER button.
  • Page 63 . Calibration 7-9. Bump test condition setting Press the ▲ button. Set whether or not to perform span calibration after "F" (Failure) is displayed * Set range as a result of on: Span calibration diagnosis. performed off: Span calibration not Press the ENTER button.

  • Page 64: Password Setting

    . Calibration 7-10. Password setting 7-10. Password setting A password can be used to protect the entry to the calibration mode. LCD display Press the ENTER button. The gas detector enters the password setting mode. Select whether or not to set a password with the ▲/▼...
  • Page 65 . Calibration 7-10. Password setting After "END" is displayed, the gas detector returns to the calibration mode menu. (Buzzer sound: Once <blip>) - 65 -...

  • Page 66: Alarm Function

    8. Alarm Function 8-1. Gas alarm activation Alarm Function 8-1. Gas alarm activation "Gas alarm" is triggered in the gas detector with a blinking alarm lamp, buzzer sound and blinking gas concentration display when the concentration of detected gas reaches or exceeds the alarm setpoint values.
  • Page 67 8. Alarm Function 8-1. Gas alarm activation <How to Reset Alarm> The gas detector resets a gas alarm automatically when the concentration of detected gas falls below the alarm setpoint value. (Non latching (auto-reset)) NOTE • When the concentration of detected gas falls below the alarm setpoint value, the operations of buzzer, alarm lamp and vibration will be reset automatically (non latching (auto-reset)).

  • Page 68: Fault Alarm Activation

    LCD display If a fault alarm is triggered, determine the cause and take appropriate action. If the gas detector has problems and is repeatedly malfunctioning, contact RIKEN KEIKI immediately. NOTE • A low flow rate alarm (FAIL LOW FLOW) can be reset by pressing the RESET button. For other fault alarms, turn off the power and then promptly contact RIKEN KEIKI.

  • Page 69: Maintenance

    Check the gas alarm using a calibration gas. ○ WARNING • If an abnormality is found in the gas detector, contact RIKEN KEIKI immediately. NOTE • The span adjustment requires dedicated equipment and creation of calibration gas. Therefore, contact RIKEN KEIKI for span adjustment.
  • Page 70 Our qualified service engineers have expertise, knowledge and other information on the dedicated tools used for services, along with other products. To maintain the safety operation of the gas detector, please use our maintenance service. The followings are typical maintenance services. For details, contact RIKEN KEIKI. <Main Services> Item...

  • Page 71: How To Clean

    9. Maintenance 9-2. How to clean 9-2. How to clean Clean the gas detector if it becomes extremely dirty. The gas detector must be turned off while cleaning it. Use a waste cloth or the like to remove dust. Do not use water or organic solvent for cleaning because they may cause malfunctions.

  • Page 72: Parts Replacement

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

  • Page 73: Storage And Disposal

    • When the gas detector is used again after a long-period storage, never fail to perform a calibration. • Contact RIKEN KEIKI for information on readjustment including calibration. 10-3. Disposal of products When the gas detector is disposed of, it must be treated properly as an industrial waste in accordance with the local regulations, etc.
  • Page 74 10. Storage and Disposal 10-3. Disposal of products <Disposal in EU Member States> When disposing of the gas detector 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 75: Troubleshooting

    This simply helps to find the causes of malfunctions which may frequently occur. If the gas 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. 11-1. Abnormalities on unit...

  • Page 76: Abnormalities Of Readings

    FAIL LOW FLOW reset the alarm. hose, etc. The pump has failed. Request the dealer or Riken Keiki local representative to replace the pump. The gas detector is left Cycle the power a few times. The pump may unused for a long time (six start operating.

  • Page 77: Product Specifications

    12. Product Specifications 12-1. List of product specifications Product Specifications 12-1. List of product specifications Model NP-1000 Gas to be CH4, and C3H8, i-C4H10, H2, He and Ar as optional specification detected Detection Thermal conductivity principle Measurement 0-100 vol% range ON/OFF setting available (default: OFF), arbitrary alarm setpoint Gas Alarm: setting available, non-latching (auto-reset)

  • Page 78: List Of Optional Parts

    12. Product Specifications 12-2. List of optional parts switching pump performance between strong and weak, changing a reading target gas, balance gas selection Power supply: 4 AA alkaline batteries Accessories Storage: Hand strap Sampling: Gas sampling hose (1 m) and gas sampling probe * To meet explosion-proof performance requirements, use the batteries specified in the certification of explosion-proof electrical equipment.

  • Page 79: Appendix

    Appendix 13-1. Definition of terms Appendix 13-1. Definition of terms vol% Gas concentration indicated in the unit of one-hundredth of the volume Gas concentration indicated in the unit of one-millionth of the volume The acronym of Lower Explosive Limit. Lower explosive limit (LEL) refers to the lowest concentration of a combustible gas in air capable of causing explosion when ignited.

This manual is also suitable for:

Np-1000Np-1000-h2

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