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Riken Keiki NP-1000, Operating Manual

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Riken Keiki NP-1000 Operating Manual Download Page 79

Appendix 

13-1. Definition of terms 

 

 

- 79 -

 

 

 

 

 

 

13 

Appendix 

 

 

 

13-1. Definition of terms 

 

vol% 

Gas concentration indicated in the unit of one-hundredth of the volume 

ppm 

Gas concentration indicated in the unit of one-millionth of the volume 

LEL 

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. 

 

 

 

13. 

Summary of Contents for NP-1000

Page 1: ...PT0E 1495 Portable Combustible Gas Detector NP 1000 Operating Manual PT0 149...

Page 2: ...t Display Mode 28 5 1 Entering the display mode 28 5 2 Concentration displayed gas reading setting base 31 5 3 Alarm setpoint display 34 5 4 Pump suction volume setting 36 5 5 Log data display 38 6 Ho...

Page 3: ...10 2 Procedures to use the gas detector again 73 10 3 Disposal of products 73 11 Troubleshooting 75 11 1 Abnormalities on unit 75 11 2 Abnormalities of readings 76 12 Product Specifications 77 12 1 Li...

Page 4: ...ed to copy or reproduce this manual in whole or in part without permission Regardless of warranty period we shall not make any indemnification for accidents and damage caused by using the gas detector...

Page 5: ...tion is performed in the atmosphere check the atmosphere for freshness before beginning it If interference gases exist the adjustment cannot be performed properly thus leading to dangers when the gas...

Page 6: ...gas detector in a place where it is exposed to direct sunlight Do not store the gas detector in a sun heated car Observe the operating restrictions to prevent condensation inside the gas detector or g...

Page 7: ...of the four batteries with new ones at one time The conditions for the explosion proof standard of the gas detector include the use of TOSHIBA batteries To use the unit as an explosion proof product u...

Page 8: ...ctrical specifications Driven by four AA alkaline batteries LR6 manufactured by TOSHIBA Certificate number IECEx IECEx DEK13 0090 ATEX DEKRA 13 ATEX0227 Applied standards IEC60079 0 2017 IEC60079 11 2...

Page 9: ...ector 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 P...

Page 10: ...a conductive work floor with a leakage resistance of 10 M or less Replace the batteries in a non hazardous area The specifications of the gas detector are as follows Power supply 6 0 VDC LR6 manufactu...

Page 11: ...ss this switch to reset the alarm 6 DISPLAY button Press this switch to change between display modes 7 POWER ENTER button Turns the power ON or OFF 8 Gas inlet Connect a gas sampling hose to this port...

Page 12: ...ncentration and unit 7 Full scale and bar display Displays the level of gas concentration with the bar meter as well as the full scale value 8 Clock display Displays the current time NOTE The meanings...

Page 13: ...Name Function 1 Gas sampling probe Placed in a detection area to collect a gas The probe includes a dust filter 2 Gas sampling hose A resin hose through which the sampled gas goes 3 Hose clamp couple...

Page 14: ...led with sufficient battery level The dust filter is not contaminated The gas sampling probe is not loose The hose clamp coupler is connected securely 4 2 1 How to replace the batteries When the gas d...

Page 15: ...sampling probe and remove the tip section by turning it counterclockwise CAUTION Never fail to turn off the power of the gas detector before replacing the batteries Replace the batteries in a safe pl...

Page 16: ...ure Insert the hose clamp coupler into the gas inlet of the main unit while pulling the release ring and then release the release ring NOTE Insert the hose releasing coupler to the gas inlet GAS IN si...

Page 17: ...changes automatically as shown below and the gas detector enters the detection mode 1 Press and hold the POWER button for three seconds or longer Hold it down until all the LCDs and alarm lamp light...

Page 18: ...the gas detector 18 Full scale Display Display example 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...

Page 19: ...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 WARNING If the main unit is dr...

Page 20: ...arms 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 Display Mode Operate A...

Page 21: ...N2 or CO2 To perform air calibration set a base gas to AIR beforehand For details about the base gas setting see 5 2 Concentration displayed gas reading setting base P 31 LCD display 1 In the detectio...

Page 22: ...nt or in the fresh air Perform air calibration after the reading is stabilized If there is a sudden temperature change of 15 C or more between the storage and operational locations leave the gas detec...

Page 23: ...is case take proper actions based on your judgment Issuance of a gas alarm while the gas detector is used for the purposes such as explosion prevention indicates that there are extreme dangers Take pr...

Page 24: ...f a combustible gas with high concentration such as 100 vol is drawn some gas may remain in the gas sampling hose due to adsorption in the hose gas sampling probe etc After drawing a high concentratio...

Page 25: ...gas detector With Auto selected the mode is switched between the low and high ranges Press the POWER button The buzzer blips once and the range switches to another every time the button is pressed Lo...

Page 26: ...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 1 Press the and buttons The gas detector en...

Page 27: ...ff Press and hold the POWER button at least three seconds until the buzzer blips four times TURN OFF disappears to turn off the power CAUTION Do not turn off the power while the gas concentration disp...

Page 28: ...gas detector when a base gas is set to N2 or CO2 When non operation time lasts 20 seconds the gas detector returns to the detection mode automatically The backlight goes off after 30 seconds or so of...

Page 29: ...setting By changing the setting to the pre registered gas in the gas detector the converted concentration from the detection target gas CH4 will be displayed P 31 Alarm setpoint display Displays the...

Page 30: ...5 How to Set Display Mode 5 1 Entering the display mode 30 Entering user mode Enters the user mode P 40 Detection mode Returns to the detection mode...

Page 31: ...ead instead to display its concentration LCD display 1 Press the ENTER button The gas detector enters the base gas setting mode 2 Select a base gas name with the button and then press the ENTER button...

Page 32: ...on the list of specifications is applied to the calibration gas CH4 only The concentration displayed for a converted reading is a reference value To display an accurate concentration calibration usin...

Page 33: ...pane C3H8 3 Isobutane i C4H10 4 Argon Ar 5 Helium Hr 6 Hydrogen H2 NOTE Argon Ar and Helium He in the above list are not categorized as combustible gas generally however they are handled by a combusti...

Page 34: ...y An alarm setpoint can be displayed and activation test can be performed LCD display 1 Press the ENTER button The alarm setpoint display appears Press the DISPLAY button to cancel the operation 2 Sel...

Page 35: ...splay Mode 5 3 Alarm setpoint display 35 Press the ENTER button to test the selected alarm activation Press any button to reset the alarm 3 Press the DISPLAY button The gas detector returns to the dis...

Page 36: ...Low Suction volume low or H High Suction volume high LCD display 1 Press the ENTER button The gas detector enters the pump suction volume setting mode Press the DISPLAY button to cancel the operation...

Page 37: ...isplay Mode 5 4 Pump suction volume setting 37 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 suct...

Page 38: ...iewed LCD display 1 Press the ENTER button The gas detector enters the log data display Press the DISPLAY button to cancel the operation 2 Press the button to select the log memory number and then pre...

Page 39: ...g data display 39 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 3 Press the DISPLAY button to exit The gas detector r...

Page 40: ...1 In the detection mode press the DISPLAY button six times to display the user mode entry 2 Press the ENTER button The peak bar display setting screen is displayed Press the button to select the menu...

Page 41: ...6 How to Set User Mode 6 1 Entering the user mode 41 NOTE The backlight goes off after 30 seconds or so of no operation...

Page 42: ...ed during the period from power on to the point of checking on the bar graph P 43 Date time setting Set the date time of the internal clock P 45 Alarm setpoint setting Set the alarm function to ON OFF...

Page 43: ...displayed on the bar LCD display 1 Press the ENTER button The gas detector enters the peak bar display setting mode 2 Enable on or disable oFF the peak bar display with the button This is disabled oFF...

Page 44: ...6 How to Set User Mode 6 2 Peak bar display setting 44...

Page 45: ...ck LCD Display 1 Press the ENTER button The gas detector enters the date time setting 2 Adjust the date time with the button and press the ENTER button 3 Set year month day hour minute in this order W...

Page 46: ...ing mode 2 Enable on or disable oFF the alarm function with the button This is disabled oFF by default 3 Press the ENTER button to confirm the selection The first alarm setting screen is displayed 4 S...

Page 47: ...ting 47 5 Set the second alarm setpoint with the button and then press the ENTER button Set the second alarm setpoint within the following range Hi First alarm setpoint to 100 After END is displayed t...

Page 48: ...hat the surrounding air is fresh Air calibration P 21 P 55 Preparation for N2 CO2 calibration Items to Prepare Calibration gas N2 or CO2 of 100 vol recommended Gas sampling bag 1 Stopwatch 1 Optional...

Page 49: ...ation 7 1 Preparation for air and N2 CO2 calibrations 49 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 perfo...

Page 50: ...lect the menu and press the ENTER button to perform the setting When a password has been set for the calibration mode the password entry screen will be displayed NOTE The backlight goes off after 30 s...

Page 51: ...ump 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...

Page 52: ...n gas P 60 Bump test condition setting Set the bump test operating conditions P 62 Password setting Set a password used to protect the entry to the calibration mode P 64 Return to detection mode To ex...

Page 53: ...ng see 5 2 Concentration displayed gas reading setting base P 31 LCD display 1 Press the ENTER button The gas detector enters the bump test mode 2 Supply a test gas and press the ENTER button BUMP and...

Page 54: ...Calibration 7 3 Bump test base gas N2 54 3 Press the ENTER button After the result of the bump test is displayed the gas detector returns to the calibration mode menu FF Fail...

Page 55: ...ode 2 Hold down the AIR button 3 Release the AIR button when the display changes from AirCL HOLD AIR to AdJ RELEASE Buzzer sound Three times blip blip blip After zero adjustment END is displayed and t...

Page 56: ...is tested using a test gas LCD display 1 Press the ENTER button The gas detector enters the N2 calibration mode 2 Supply a test gas and press the ENTER button After END is displayed the gas detector d...

Page 57: ...ion is tested using a test gas LCD display 1 Press the ENTER button The gas detector enters the CO2 calibration mode 2 Supply a test gas and press the ENTER button After END is displayed the gas detec...

Page 58: ...ng on the factory default setting LCD display 1 Press the ENTER button The gas detector enters the AUTO CAL mode 2 When the preset adjustment value is displayed press the ENTER button The value of AUT...

Page 59: ...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 calibratio...

Page 60: ...may not be displayed depending on the factory default setting LCD display 1 Press the ENTER button The gas detector enters the ONE CAL mode The concentration display blinks and the system waits for th...

Page 61: ...Calibration 7 8 ONE CAL 61 After span adjustment END is displayed and then the gas detector returns to the calibration mode menu Buzzer sound Once blip 4 Stop supplying the calibration gas...

Page 62: ...rmed Set range 30 45 60 90 seconds Diagnosis is performed automatically when the set time has passed 3 Press the button 4 Set a threshold for checking a test gas Press the ENTER button When the displa...

Page 63: ...he ENTER button When the display starts blinking select a value with the button When the ENTER button is pressed END is displayed and the setting is confirmed Set range on Span calibration performed o...

Page 64: ...2 Select whether or not to set a password with the button The state of on or oFF for the current password protection setting is displayed This is disabled oFF by default 3 Press the ENTER button When...

Page 65: ...Calibration 7 10 Password setting 65 After END is displayed the gas detector returns to the calibration mode menu Buzzer sound Once blip...

Page 66: ...enable gas alarm set it to ON and specify an alarm setpoint using Alarm setpoint setting P 46 in the user mode Alarm type First alarm Second alarm Alarm lamp Repeatedly blinks at about one second inte...

Page 67: ...ls 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 res...

Page 68: ...r Repeatedly sounds intermittent beeps at about one second intervals LCD display Display example of low flow rate LOW FLOW If a fault alarm is triggered determine the cause and take appropriate action...

Page 69: ...y for a fault indication Concentration display check Make the gas detector draw in fresh air and check that the concentration display value is zero When the value is other than zero perform zero adjus...

Page 70: ...y check Verifies that the concentration display value is zero by using the zero gas Performs the air calibration if the reading is incorrect Flow rate check Checks the flow rate indicator to find abno...

Page 71: ...llows 1 Wipe away moisture on the gas detector thoroughly using a dry towel cloth etc 2 While holding the gas detector firmly shake it about ten times with the buzzer sound opening facing downward 3 W...

Page 72: ...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 The abo...

Page 73: ...products When the gas detector is disposed of it must be treated properly as an industrial waste in accordance with the local regulations etc CAUTION When the gas detector is used again after a long...

Page 74: ...ection system and recycling system based on the regulations of EU member states NOTE Crossed out recycle dustbin mark This symbol mark is indicated on the products which contain the batteries which fa...

Page 75: ...teries are properly installed to the main unit Abnormal operations Disturbances by sudden static electricity noise etc Turn off the power once and then turn it on again restart Cannot operate the gas...

Page 76: ...place the pump The gas detector is left unused for a long time six months or longer Cycle the power a few times The pump may start operating If the problem still persists request RIKEN KEIKI to replac...

Page 77: ...etection method Pump suction type with a flow rate of 0 3 L min or more pump L mode Display LCD seven segment numeric display bar meter display 50 divisions and status information display Seven segmen...

Page 78: ...oof electrical equipment 12 2 List of optional parts 30 m hose Dedicated leather case Filter 2 L gas sampling bag Data logger management program switching pump performance between strong and weak chan...

Page 79: ...icated in the unit of one hundredth of the volume ppm Gas concentration indicated in the unit of one millionth of the volume LEL The acronym of Lower Explosive Limit Lower explosive limit LEL refers t...

Page 80: ......

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