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- 15 - 

7. Operating 

Instructions 

7-1 Notes 

to 

Users 

7-2 Procedures 

(1) Turning ON the power 

① 

Turn ON the Power switch.    If the equipment has a backup power source, turn ON the Battery switch as well. 

② 

Gas concentration indicator displays gas concentration and first and second preset alarm values.    The Power 
lamp blinks green to show that the equipment is warming up. 

③ 

The Power lamp stops blinking and lights up green and normal operation starts.    Warming up takes about 180 
seconds. 

(2) Gas sensor signal confirmation 

① 

Connect Tester to a gas sensor current signal terminal and measure the terminal voltage. 

② 

A terminal to check gas sensor current has its built in 1 

Ω

resistance (for example, it measures 180mA when a 

terminal voltage is 0.18 V). 

③ 

Since gas sensor current varies depending on sensors, always check it with test certificate supplied.         

④ 

Gas sensor current are adjusted at the factory and do not need adjusting at work sites. However if necessary, 
adjust it by turning the gas sensor adjustment volume (CURR). 

(3) Zero adjustment 

After approximately 1 week from the power on, the indicator indication value shall be stable.    Then, carry out the 
zero adjustment and span adjustment.    Always start from the zero adjustment first. 

1) Correction by the auto zero function (the equipment with linearizer only) 

The reading is automatically corrected to zero by pressing the button. Use this adjustment daily for minor zero 
point corrections.  Refer to 7-6 (1). 

2) Analog zero adjustment 

Adjust zero by turning the zero adjustment volume for trial run or after replacement of the gas sensor. Use this 
method for most zero adjustments.  Refer to 7-6 (2). 

  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. 

CAUTION 

 Make sure that there is no gas around the gas detector before carrying out zero adjustment.  If zero 

adjustment is carried out when there is gas around the gas detector, the indicator cannot indicate correct 
values. 

CAUTION 

  When the equipment is kept for long time (delivery from the factory to the power on), it may take time to 

get the indication value on the indicator stable.. 

 The hot-wire semiconductor sensor mounted on this detector head is very sensitive, and base value 

changes by the existence of interference gases. Therefore, please adjust the base value slightly higher than
0 value. (except the equipment with linearizer) 

MEMO

Содержание NV-100H

Страница 1: ...100H 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 017 01 December 2004 ...

Страница 2: ...equipment has a backup power source 18 7 6 Maintenance Function 19 8 Maintenance and Inspections 29 8 1 Regular Inspections Inspections that the users are responsible for See Table 1 29 8 2 Maintenance inspections Contact our dealer agency for the inspection 30 8 3 Preparation of Calibration Gas used for your actual gas performance test 31 8 4 Replacing the Gas Sensor 33 8 5 Replacing the Filter s...

Страница 3: ... the said laws and regulation before installing or operating the equipment Installing wiring and other works concerning the equipment should be carried out by qualified persons following all applicable federal state and local health and safety laws and regulations including OSHA WARNING MEMO CAUTION DANGER Operation checks using actual gas are very dangerous because combustible gas may explode and...

Страница 4: ... detector head 2 3 4mm 1 ea Lshaped wrench For Suction type gas detector head 2 4 5 8mm 1 ea Parts to embed the panel embedded panel only 1 Air filter FC 32 with flow checker for Suction type gas detector head only 1 Sample gas collector PE N3 for Suction type gas detector head only 1 NV 100H instruction manual this book 1 Test results of the equipment 1 Warranty 1 Options separately sold KW 15 fo...

Страница 5: ...DC Diffusion type gas detector KD 5 Control device Power source AC100 200V DC24V Alarm contact 3C cable 6C cable Fig 1 System Structure The indicator and alarm unit is not an explosion proof construction Install it in a non hazardous area CAUTION One gas detector either diffusion or suction type gas detector can be connected Use a rainproof cover option if you install the equipment outdoor The num...

Страница 6: ...it with a backup power source 1 2 RESET BZSTOP POWER ALARM BACKUP H G F E S R PA PB 5 0 TA ZB2 ZA2 ZB1 ZA1 COM N AR AS TB BZ 15 2 9 10 3 11 5 4 26 27 12 6 8 28 1 14 13 7 29 18 19 20 21 23 22 2 φ6 24 25 113 71 5 17 16 C D A SET 0 6 4 2 10 8 1 2 RESET BZSTOP POWER ALARM BACKUP H G F E S R PA PB 5 0 TA ZB2 ZA2 ZB1 ZA1 COM N AR AS TB BZ ＦＵＳＥ 30 31 32 3 φ6 70 110 C D A SET 0 6 4 2 10 8 ...

Страница 7: ...gram Usually it is not used 14 Program switch Use to write in the program Usually select the left side 15 Power switch Aswitch to open close the equipment s power source 16 AC power source fuse φ5 2 20L1Aglass fuse 17 Jumper pin It is used for various settings No setting by customer is necessary 18 Sensor signal check terminal SIGNAL Aterminal to check gas sensor signals 19 Sensor current check te...

Страница 8: ...8 Stand 1 7 M5phexagon socket head bolt 3 6 M4phexagon socket head bolt 1 5 Guard mount 1 4 Sensor guard 1 3 Sensor unit 1 2 Terminal box cover 1 1 Terminal box 1 Q ty Remark Fig 4 Diffusion type gas detector head KD 5 Refer to the instruction manual for KD 2A KD 3Awhen use gas detector head KD 2A KD 3A MEMO 2 1 8 5 4 3 9 15 6 14 94 67 78 10 13 12 11 7 99 42 53 46 2 9 15 oval hole ...

Страница 9: ... 1 8 Terminal block 1 7 Suction pump 2 6 Sensor element 1 5 Mount 1 4 Half joint 2 3 Gap plate 2 2 Terminal box 2 1 Detector main body 1 Q ty Remark Fig 5 Suction type gas detector head G3 4 1 122 146 Grounding terminal P A A B 4 7 177 137 348 135 96 76 20 34 49 ...

Страница 10: ...otifying others in case of an alarm is possible Do not place the indicator and alarm unit in a place with vibration electric noise or corrosive gas Avoid places with a high temperature or humidity as well CAUTION As to the gas detector to be connected refer to its instruction manual MEMO Size of mounting holes is different if the equipment has a backup power source If the equipment has no backup p...

Страница 11: ...quipment can be attached to a 1 6 to 6 mm thick panel Fig 7 Dimensions to Cut a Panel Fig 8 Embedding on a Panel Leave a 30 cm space under the equipment s body for maintenance work If the equipment has a backup power source also leave a 30 cm space on the right side of the equipment for changing batteries MEMO 110 200 Attaching screw Equipment Equipment Without abackup power source Witha backup po...

Страница 12: ...ith silicon compounds as silicon could poison and or impair the sensitivity of the sensor The gas detector should be installed in a location free from vibration Avoid severe shocks and or mechanical impact to the gas detector When the gas detector is to be installed in an outside location make sure to use a rain protective cover or cap Use Auto drain function optional item when use the Suction typ...

Страница 13: ...to fix How to install the rainproof cover optional item and rainproof cap optional item Fig 10 How to install the fixing plate Fig 11 KW 15 KW 22 installation Fix on the wall with attached the M6 hexagon bolt andthe nut Tighten thescrewto fix Rainproof cover KW 15 Rainproof cap KW 22 Fixing plate saddle Fixing plate stand Pan head screw ...

Страница 14: ... or less And the gas detector head should be installed in a location where is easy to access for maintenance Example locations to install Installation for Rainproof cover PW 51 Fig 12 Example location to install Suction type gas detector head Fig 13 Example installation for PW 51 Sample gas collector should be installed at high location where is free from sucking water CAUTION Drain pit Alocation ...

Страница 15: ...Gas concentration around the gas detector can be continuously monitored and recorded by connecting a recorder to the analog output terminal There are G and H terminals on the terminal block Standard output is 4 20 mA Input resistance of the recorder should be 500Ω or less Turn OFF the indicator and alarm unit s power before opening the cover of the gas detector Opening the cover when the power is ...

Страница 16: ...xternal switch Control device Upper terminal block Lower terminal block Analog output 4 20mA 1 5V Grounding Grounding 6C cable Suctiontype PE 2DC Breaker COM N AR AS ZA1 ZB1 ZA2 ZB2 TA TB BZ A B C D F G H E PA PB R P S N 制御機器 外部スイッチ 空 上段端子台 下段端子台 B ｱﾅﾛｸﾞ出力 4 20mA 遮断器 AC100 200V DC24V 接地 1 5V 拡散式ガス検知部 接地 E C A 3Cｹｰﾌﾞﾙ KD 5 N External switch Control device 3C cable Breaker Grounding Diffusion type K...

Страница 17: ...stment Always start from the zero adjustment first 1 Correction by the auto zero function the equipment with linearizer only The reading is automatically corrected to zero by pressing the button Use this adjustment daily for minor zero point corrections Refer to 7 6 1 2 Analog zero adjustment Adjust zero by turning the zero adjustment volume for trial run or after replacement of the gas sensor Use...

Страница 18: ...with a backup power source The equipment with a backup power source has a function to check the battery s life Follow the procedures below to check the battery s life Confirm that normal mode Mode Switch 0 is selected then press the Battery Test Switch down for five seconds The Backup lamp blinks red and message window indicates the battery voltage 7 Checking analog output Terminal block G and H c...

Страница 19: ...after the buzzer is stopped and the reading lowers to below the preset alarm value theAlarm lamp and peak hold go off When using an external reset terminal you can reset using an external switch 4 In case of a failure 1 When the gas detector is out of order The Power lamp lights up orange an alarm sound four short beeps is heard and message window displays the type of the failure Failure E Sensor ...

Страница 20: ...he battery connector and take out the batteries Insert new batteries and attach the connector Put the battery cover back If you change setting for function switches the equipment cannot perform as it is supposed to for example alarm does not go off even when there is gas leakage Do not change setting unless you completely understand features of Function switches CAUTION When gas leaks indoors open...

Страница 21: ... 3 9 Only used for adjustment at factory Do not use them When adjustment in a mode is completed always set the Mode switch at zero to return to normal mode If the switch is left at other mode the equipment cannot alarm gas leakage correctly Message window displays preset value and alternately during maintenance mode to prevent you from forgetting to return to normal mode after adjustment Do not ch...

Страница 22: ...no gas around the gas detector then turn the zero adjustment volume ZERO to set the indicated value to 1 0 Set the Mode switch at zero to return to normal mode POWER ALARM 2 1 RESET BZSTOP BACKUP Off Use the analog zero and span adjustment method to adjust non linearizer models MEMO POWER ALARM 2 1 RESET BZ STOP BACK UP Peak hold value POWER ALARM 2 1 RESET BZSTOP Adjust the indicator to read 1 0 ...

Страница 23: ... apply calibration gas to the gas detector for a minute Set the Mode switch at 2 to select maintenance mode 2 Always perform analog zero adjustment before doing analog span adjustment Otherwise the span cannot be adjusted properly when the analog span adjustment is performed CAUTION POWER ALARM 2 1 RESET BZSTOP BACKUP Off POWER ALARM 2 1 RESET BZSTOP BACKUP On POWER ALARM 2 1 RESET BZSTOP BACKUP P...

Страница 24: ...o see if the gas concentration is indicated correctly Match the peak hold value POWER ALARM 2 1 RESET BZSTOP POWER ALARM 2 1 RESET BZSTOP Check to see if the reading returns to 1 0 Return to the Full scale POWER ALARM 2 1 RESET BZSTOP POWER ALARM 2 1 RESET BZSTOP Make sure that there is no gas around the gas detector and check to see if the indicator reads 1 0 Note that a gas leak alarm and extern...

Страница 25: ...Z STOP key is pressed the message window will display a blinking Err indication and auto zero adjustment will be impossible If this occurs carry out analog zero adjustment in maintenance mode 2 MEMO POWER ALARM 2 1 RESET BZSTOP BACKUP 40 POWER ALARM 2 1 RESET BZSTOP BACK UP 40 Off POWER ALARM 2 1 RESET BZSTOP BACKUP 40 On Corrected to zero There are two ways to adjust models with linearizer specif...

Страница 26: ...Reset key until the Power lamp goes off The Power lamp lights up again and the peak hold value is automatically corrected to the auto span preset value Set the Mode switch at zero to return to normal mode POWER ALARM 2 1 RESET BZSTOP BACKUP 40 POWER ALARM 2 1 RESET BZSTOP BACKUP 40 Auto span preset value POWER ALARM 2 1 RESET BZSTOP BACKUP 40 POWER ALARM 2 1 RESET BZSTOP BACKUP 40 Peak hold Off PO...

Страница 27: ...SET key is pressed the message window will display a blinking Err indication and auto zero adjustment will be impossible If this occurs carry out analog span adjustment in maintenance mode 2 MEMO Note that a gas leak alarm and external output will be generated when calibration gas is applied in normal mode CAUTION POWER ALARM 2 1 RESET BZSTOP Check the calibration concentration BACK UP ...

Страница 28: ...cations 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 If you fail to do so zero and span adjustment cannot be carried out correctly Indicated values with linearization cancelled are displayed whi...

Страница 29: ... apply calibration gas to the gas detector for a minute Set the Mode switch at 2 to select maintenance mode 2 POWER ALARM 2 1 RESET BZSTOP BACK UP Peak hold value On POWER ALARM 2 1 RESET BZSTOP BACKUP Always perform analog zero adjustment before doing analog span adjustment Otherwise the span cannot be adjusted properly when the analog span adjustment is performed CAUTION POWER ALARM 2 1 RESET BZ...

Страница 30: ... to see if the gas concentration is indicated correctly POWER ALARM 2 1 RESET BZSTOP BACKUP Match to the peak hold value POWER ALARM 2 1 RESET BZSTOP BACKUP Match to the calibration gas concentration value POWER ALARM 2 1 RESET BZSTOP BACKUP Check that the reading returns to zero POWER ALARM 2 1 RESE T BZSTOP BACKUP Return to the full scale Note that a gas leak alarm and external output will be ge...

Страница 31: ...ems to be inspected regularly and the inspection method Table 1 Items to be inspected Inspection method Zero point check Make sure that there is no gas around the gas detector then check that the bar graph on the indicator indicates zero POWER lamp check Check that the POWER lamp green on the indicator unit is on Flow inspection for Suction type gas detector only Check that the flow checker s filt...

Страница 32: ...spections at least once a year Table 2 Items to be inspected Inspection method Sensor s current inspection Refer to 7 2 Procedures 2 Zero point adjustment Refer to 7 2 Procedures 3 POWER lamp check Refer to 2 on Table 1 about daily inspection Preset alarm value Check that the preset alarm value mark on the indicator unit s bar graph is at the proper value Refer to 7 2 Procedures 4 Flow inspection ...

Страница 33: ...sobutene 0 1vol 1 If you have a standard gas cylinder Fill a gas bag with standard gas as shown in Fig 17 Completely vacuum the air from the bag before filling the gas because the air in the bag may cause an error of the gas concentration 2 If you do not have a standard gas cylinder Make 0 1vol 5 6 LEL calibration gas by diluting pure gas isobutane 99 with the air using the calibration equipment k...

Страница 34: ... all the way out 100ml Making diluted gas Connect an empty gas bag to the outlet of the quantitative pump then push in the pump s piston Move the piston back and forth nine times to add air in order to make diluted gas If you take 1ml of raw gas and move the quantitative pump s piston back and forth ten times a back and force motion 100ml 1ml 100ml 10 0 001 0 1vol diluted gas is made Isobutane s l...

Страница 35: ...l operation Carry out zero and span adjustments after replacing the sensor unit Refer to 5 6 Maintenance Function 1 and 3 Fig 19 Calibration Equipment Kit for KD 5 Turn OFF the power of Indicator Alarm unit before opening the cover of the gas detector Opening the cover of the gas detector when the power is on may cause a fire WARNING Fig 20 Replacing the Sensor of a Diffusion Gas Detector instruct...

Страница 36: ...inted wiring board then fix them back onto the detection compartment Set the gas sensor holding board onto the detection compartment in the correct direction Attach the crimp style terminals of gas sensor cables and lead in cables to the trunk terminals Close the electric compartment s cover then tightly fasten it with the hexagon socket head bolts M10 25 Turn ON the power of the Indicator Alarm u...

Страница 37: ...may decrease flow Loosen the fastening ring and detach the cup and O ring Detach the dirty filter by turning and twisting it Wash the inside of the cup with water and completely dry it Press a new filter in and upwards as far as it goes to attach it Attach the cup and O ring then fasten the fastening ring Fig 22 Replacing the Filter of a Flow Checker FC 32 float OUT filter element O ring cup faste...

Страница 38: ...ashers are attached in their correct positions Turn OFF the power of the main body before cleaning the gap plate in order to prevent a fire or explosion WARNING Be careful not to damage the joints of the gap plate or the side of the electric compartment Damage to these parts decreases the equipment s explosion proof properties CAUTION If you need to detach the filter with a flow checker to carry o...

Страница 39: ...e Power lamp lights up when the Power switch is turned ON gas concentration is not displayed Mode switch is not set at zero Set the Mode switch at zero Refer to 7 6 The equipment and the gas detector are not properly connected Check the wiring and re tighten the terminal Refer to 7 6 The Power lamp lights up orange Gas sensor failure in the detector head Replace the gas sensor Refer to the instruc...

Страница 40: ...ct Contact capacity AC100V 2Aload resistance External reset terminal Terminals for external alarm stop and reset Analog output 4 20 mA standard 1 5 V Option Alarm delay Delay mode can be set Delay time About 10 seconds Power source AC100 240V 50 60Hz standard DC24V Option Power consumption Diffusion type 12VA 17VA with a backup power source Suction type 4VAper unit to be add Backup power source Eq...

Страница 41: ...NV 100H 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 All obligations and liabilities under this product warranty are limited to repairing or replacing at the manufacturer s option of the allegedly defective items return...

Страница 42: ... Alarm accuracy Difference between the preset alarm value and gas concentration when an alarm actually occurs or as the percentage of the difference compared to the preset alarm value Response time Time it takes from when the gas detector is exposed to a gas with a concentration higher lower than the preset alarm value until an alarm goes off Temperature range Range of temperature where the equipm...

Страница 43: ...ditional 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 6309 1514 http www new cosmos co jp New Cosmos Electric Co Ltd ...

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