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1. G M I O Oxygas 500 120eiva EEx iad IIC T4 20 C lt Tamb lt 50 C BASO1ATEX2292 amp x7 II 2 G UL Class 1 Groups A B C and D 1 2 7 Il ATEX Directive 94 9 EC
2. TOU SAMPLE OFF va SAMPLE FAULT
3. G M I rou 21 C 26 Oxygas 500 To
4. 1 2 LEL ykog LEL 6ykog CGI 1 C 29 0 amp cas MEASUREMENT INSTRUMENTS LTD C 30 Index Symbols 1 25 A ACCESSORIES 37 Accuracy A 1 ADDITIONAL INFORMA TION 41 ADVICE DISPOSAL i alkaline A 2 Alkaline LR20 Dry Cell Batteries 15 AREAS OF USE iii B BAT 25 BAT FAULT 25 Batteries 15 Battery Pack 16 27 29 30 Before Use Checks 17 Button Operation 23 C CALIBRATION 35 B 1 Calibration Date Features 21 Calibration Procedure B 5 Calibration Validity 36 Changing Range 23 Charger Flatbed 28 Charger Smart 28 Charger Standard 27 CHECK ZERO 24 Combustible Gas Indicator Leak Detection 2 Commissioning 6 Construction 15 A 2 COPYRIGHT
5. 1 CHECK ZERO ZERO FAULT BAT 60 Me BAT 30
6. 2 amp 4 Opy vou n e tu H n 9205 CAL QUE rou Li Ll 2005 0 28 Oxygas 500 CAL DUE rou PURGE 1 E
7. BAT FAULT OFF BAT FAULT 1 C27 0 amp cas MEASUREMENT INSTRUMENTS LTD AEITOYPTIA I De NEN CGI LEL 1 Gi To 0 10096
8. 13 Ranges of Operation vanen 13 LEL 0 to 10096 sn terere 13 Volume Gas 0 to 100 14 Oxygen 0 2596 14 OXYGAS 500 USER HANDBOOK COMSUUCUOMN ein arance apre pit 15 Batteries soo 15 Disposable Alkaline LR20 Dry Cell Batteries 15 Rechargeable Battery 16 lal P 16 Liquid Crystal Display LED 16 Before Use Checks ee eremi en 17 OPERATING INSTRUCTIONS 19 Modes of Operation Switching re ee Calibration Date 21 Switching Off the Instrument Pump 221 Switching On in Purge Mode 22 Switching Off ak 22 Changing Range u a 23 Summary of Button Operation 23 Operator Messages Fault Flags 24 OPERATOR MAINTENANCE 27 Rechargeable Battery 27 Standard Charger su Flatbed Charger Smart Charger ai Replacing the Battery Pack 29 vi CONTENTS Recharging the Battery 30 Replacing Alkaline LR20 Dry Cell Batteri
9. flash Februari 2005 C 16 Oxygas 500 Handhavande Dessa meddelande f ljs av den aktuella gaskoncentrationen Anm r instrumentet I Purge mode r indikeringen f r PURGE synlig i displayen nm GORS PUR Alternate flash Pump AV P Ett tryck p knapp 1 v d pumpen g r stoppar pumpen Med ytterligare ett tryck startar pumpen igen Byte av m tomr de Varje tryckning p knapp 2 ndrar m tomr det Displayen ndras i ordningsf ljden LEL vol Gas Oxygen LEL vol Gas etc CGI Alternativ 1 Vol Gas Oxygen Vol Gas etc Purge Alternativ 2 St ng av Ett dubbeltryck p knapp 1 st nger av instrumentet Off visas i displayen och instrumentet g r igenom en avst ngningssekvens under ca 5 sek C 17 0 amp cas MEASUREMENT INSTRUMENTS LTD Tjek liste DO Ui Te cx Tjek at instrumentet ikke har nogle benlyse fejl Tjek tilbeh r Lees og forst burger manualen fer brug Taend instrumentet Tjek batteriet level Taend altid og nulstil i frisk luft Sikkerhed Instrumentet skal regelmeessigt serviceres og kalibreres af autoriseret personale Opladning af batterier skal ske i et sikkert rum Tjek batteriet sidder rigtigt fast p instrumentet fgr brug Udseet aldrig batteri eller instrumentet for ekstrem varme Brug kun GMI reserve dele til instrumentet Hvis instrumentet konstatere gas f lg da de p
10. zoals getoond knipperlicht Pomp AAN UIT Een enkele druk op knop 1 wanneer de pomp draait schakelt de pomp uit en stopt het meten Een volgende druk op knop 1 schakelt de pomp weer aan Aanpassen bereik Elke enkele druk op knop 2 wijzigt het gasbereik De display laat de mogelijke bereiken zien in volgorde LEL Vol Gas zuurstof LEL Vol Gas etc CGI Mode 1 Vol Gas zuurstog Vol Gas etc Purge Mode 2 Schakel UIT Een dubbele druk op knop 1 v schakelt het instrument uit 0 25 9 T 2 0 amp cas MEASUREMENT INSTRUMENTS LTD ZERO
11. C1 0 amp cas MEASUREMENT INSTRUMENTS LTD CHECKLIST Check the instrument has no obvious faults Check accessories Read and understand handbook before use Switch ON Check battery levels Check ZERO in fresh air SAFETY The instrument must be regularly serviced and calibrated by fully trained personnel in a safe area Batteries Alkaline batteries or Rechargeable battery pack must be exchanged and recharged in a safe area and fitted correctly before use Never use damaged batteries or expose to extreme heat Only GMI replacement parts should be used If the instrument detects gas follow your own organisation s procedures and operational guidelines The combustion chamber is a flameproof assembly and must not be opened in the presence of a flammable atmosphere Oxygas 500 instruments are certified as EEx iad IIC T4 20 C lt Tamb lt 50 C BASO1ATEX2292 EY 126 ASI 0 UL Class 1 Groups A B C and D me N This equipment is designed and manufactured to protect against other hazards as defined in paragraph 1 2 7 of Annex Il of the ATEX Directive 94 9 EC Any right of claim relating to product liability or consequential damage to any third party against GMI is removed if the warnings are not observed AREAS OF USE Exposure to certain chemicals can result in a loss of sensitivity of the flammable sensor Where such environments are known or suspected itis reco
12. Indikerer at der m ske har v ret en fejl under m ling Sluk instrumentet og t nd igen i frisk luft ZERO FAULT Indikerer at nul greensen er uden for kalibrerings omr det Sluk instrumentet og taend igen i frisk luft Hvis fejlen ikke er v k send instrumentet til service BAT Fort ller at batteriet snart l ber tor for stram Alt efter kvaliteten at Alkaline batterier vil der ca vil v re 60 minutter tilbage Med genopladelige batterier er der ca 30 minutter tilbage Efter str mmen her fra falder begynder BAT FAULT at blikke Efter noget tid slukkes instrumentet automatisk BAT FAULT Fort ller at batteriet straks skal skiftes 1 Kan fremkomme efter opstart betyder at der er en kalibrering fejl Instrumentet skal sendes til service C 19 0 amp cas MEASUREMENT INSTRUMENTS LTD Taend Oxygas KNAP 1 KNAP 2 RANGE CGI Mode 1 LEL Volume Gas llt Tryk og hold nede den knap 1 sa startes opvarmnings processen og pumpen Purge Mode 2 0 100 Volume Gas llt til purge Tryk og hold nede den knap 2 8 s startes opvarmnings B B BB VES processen og pumpen zo sm 0 Under opvarmning Model Software identificeres serienummer version model serienummer software version batteristatus U kalibrerings m ned og r A flash C 20 Oxygas 500 Bruger manual Herefter vil displayet begynde at vise m linger Bemeer
13. Volume Gas range is thermal conductivity Figure 2 2 Volume Gas Range Oxygen 0 25 This range displays the percentage Oxygen content of the sample The instrument range is displayed in the top right corner of the display as O From 0 to 21 O the digital display resolves to 0 1 O From 21 to 25 O the digital display resolves to 1 O The analogue bar graph follows in 496 steps 14 GENERAL INFORMATION The gas level is determined using an electrochemical cell which like toxic sensors is sensitive to pressure transients The oxygen cell has an expected life of two years Construction The instrument is housed in a tough impact resistant moulded case made of carbon loaded polypropylene The top panel is protected by a stainless steel top plate covering a toughened glass LCD cover The battery pack is sealed and attached to the main instrument body by means of 2 stainless steel hexagonal Screws The instrument is sealed against dust and water to IP54 standard The sensors are protected from dust and water by membrane and cotton filters Batteries Disposable Alkaline LR20 Dry Cell Batteries Alkaline batteries provide approximately 15 hours operational life at ambient temperature of 20 C 68 F When the batteries are low or exhausted it is necessary to fit 4 new batteries Do not mix old and new batteries An indication of the battery condition is displayed after power on and during warm up with
14. outwith its calibration limits Switch the instrument off and then on again in fresh air If the fault does not clear return the instrument for servicing BAT Indication that the batteries will soon require replacement At this point there will be approximately 60 minutes left in a set of alkaline batteries although this figure will vary depending on battery manufacturer temperature conditions usage etc With rechargeable batteries the BAT flag indicates approximately 30 minutes operation left As the battery power continues to fall the LCD flashes a BAT FAULT message Subsequently the LCD displays OFF and the instrument automatically switches off The batteries should be replaced immediately BAT FAULT Indication that the batteries should be replaced immediately 1 Indication which can also appear after power on that a calibration data error has been detected The instrument should be returned for servicing C3 0 amp cas MEASUREMENT INSTRUMENTS LTD OPERATION m i ND L__ BUTTON 2 EB Switch ON CGI Mode LEL autoranging to Volume Gas Oxygen Press and Hold Button One to switch instrument and pump On This initiates the instrument s warm up cycle Switch ON Purge Mode B B B B oes 0 to 100 Volume Gas Oxygen pP for purge applications gt All LCD t displayed Press and Hold Button Two to PEPE switch instrument and pump On This initiates the instrument
15. s warm up cycle Instrument Software type version All LCD segments display is followed by Instrument Type and Software version then Battery status as shown u Next the instrument indicates as month and year when the next ri LE calibration is due Alternate February 2005 in flash example CA Oxygas 500 Operating Instructions The CAL DUE display screen is followed by the current gas detection reading Note When in Purge mode the PURGE flag is activated on the display as shown nm GRASP Alternate flash Pump ON OFF A single press of Button One v when the pump is running turns the pump off and stops sampling A further press of Button One turns the pump back on Changing Range Each single press of Button Two changes the gas range The display cycles through the available ranges in the order LEL Vol Gas Oxygen LEL Vol Gas etc CGI Mode Vol Gas Oxygen Vol Gas etc Purge Mode Switch OFF A double press of Button One turns the instrument Off C5 0 amp Gas MEASUREMENT INSTRUMENTS LTD Pruefliste Ger t auf sichtbare Beschaedigungen pruefen Zubehoer ueberpruefen Vor der Inbetriebnahme das Handbuch lesen oder mit der Handhabung des Instrument s vertraut sein Ger t einschalten und laut Anleitung ueberpruefen Batterieanzeige ueberpruefen Nullpunkt in frischer Luft ueberpruefen Sicherheitshinweise Das Instrument muss regelmaessig gewar
16. status shown as either OK or LO If LO condition is displayed a maximum battery operational life of 120 minutes remains During operation the BAT flag is displayed when approximately 60 minutes of operating time remains at normal temperature The instrument may continue to be used until it switches off automatically 15 OXYGAS 500 USER HANDBOOK Rechargeable Battery Pack The GMI rechargeable battery pack provides approximately nine hours operational life from fully charged at ambient temperature of 20 C 68 F An indication of the battery condition is displayed after power on and during warm up with status shown as either OK or LO If LO condition is displayed a maximum battery operational life of 90 minutes remains During operation the BAT flag is displayed when approximately 30 minutes operating time is left at normal temperatures The instrument will then turn off There are three GMI Battery Chargers a Standard Charger a Flatbed Charger and a Smart Charger The Smart Charger has both slow and fast charge options as well as a serial link for communications with the instrument See Rechargeable Battery Pack in Section 4 OPERATOR MAINTENANCE Filters A number of different filter types are available from GMI The minimum requirement is a cotton particulate filter and a hydrophobic filter which are incorporated in the probe handle assembly supplied with the instrument Filters must be checked at frequent intervals and wh
17. the latest product and this manual This Handbook is an important part of the Oxygas 500 product Please note the following points It should be with the instrument for the life of the product Amendments should be attached This Handbook should be passed on to any subsequent owner user of the instrument Although every care is taken in the preparation of this Handbook it does not constitute a specification for the instrument SOFTWARE Software supplied on EPROM or similar device for use in a particular product may only be used in that product and may not be copied without the written permission of Gas Measurement Instruments Ltd Reproduction or disassembly of such embodied programmes or algorithms is prohibited Ownership of such software is not transferable and GMI Ltd does not warrant that the operation of the software will be error free or that the software will meet the customer s requirements DISPOSAL ADVICE When no longer in use dispose of the instrument carefully and with respect for the environment GMI will dispose of the instrument without charge if returned to the factory OXYGAS 500 USER HANDBOOK SAFETY The instrument must be regularly serviced and calibrated by fully trained personnel in a safe area Batteries Alkaline batteries or Rechargeable battery pack must be exchanged and recharged in a safe area and fitted correctly before use Never use damaged batteries or expose to extre
18. 3440 13340 12890 42114 13703 12552 12358 12229 12393 38 Standard Charger 220V Power Supply Australian Plug Standard Charger w o Power Supply Flatbed Charger 240V Power Supply UK PLug Flatbed Charger 220V Power Supply Euro Plug Flatbed Charger 110V Power Supply USA Plug Flatbed Charger 220V Power Supply Australian Plug Flatbed Charger w o Power Supply 240V Power Supply UK Plug 220V Power Supply Euro Plug 110V Power Supply USA Plug 220V Power Supply Australian Plug Smart Charger with Datalogging Software c w 240V Power Supply UK Plug Smart Charger with Datalogging Software c w 220V Power Supply Euro Plug Smart Charger with Datalogging Software c w 110V Power Supply USA Plug Smart Charger with Datalogging Software c w 220V Power Supply Australian Plug Spare Rechargeable Battery Pack Manual Calibration for Windows Software Communications Link Adaptor Hydrophobic Filter use with 12481 Stainless Steel Probe Closed End 80cm 2ft 6ins approx Plastic Probe Solid End 80cm 2ft 6ins approx 12394 13427 13413 12895 12894 13561 13562 13563 13565 13655 12365 42141 42151 ACCESSORIES Flexible Probe Open End 35cm 1ft 2ins approx Plastic Probe Open End 35cm 1ft 2ins approx Stainless Steel Probe Open End 35cm 1ft 2ins approx Barbed Probe Solid End 69cm 2ft 3ins approx Barbed Probe Op
19. Charger The batteries can be charged on the instrument but the instrument itself should be switched off Regular complete discharge will keep the battery pack in good condition Replacing Alkaline LR20 Dry Cell Batteries All four batteries should be replaced at any one time and in a safe area GMI only recommend the use of Energiser or Duracell cells 1 Loosen the two instrument base screws 4mm hex using the special tool provided 30 OPERATOR MAINTENANCE 2 Remove battery cover 3 Remove the old batteries 4 Check battery compartment for damage to spring contacts or corrosion on springs Caution Under no circumstances should rechargeable batteries be fitted in place of Alkaline batteries 5 Insert four new batteries observing correct polarity indication in battery compartment base 6 Replace battery cover and fasten base screws 7 Check that the instrument switches on and works to specification 31 OXYGAS 500 USER HANDBOOK Filter Replacement Hydrophobic and cotton particulate filters in the probe handle minimise the danger of water and dust ingress Caution The instrument should never be switched on without suitable filters installed If a blockage occurs the SAMPLE FAULT indicator is displayed Check the sample line and probe handle for blockage Press Button One to clear the SAMPLE FAULT message Replace the filter s if the message does not clear To replace the fil
20. Kid Oxygas 500 User Handbook Certificate No Q 09780 Issue 1 25 05 04 Part Number 42621 GMI welcomes comments on all our publications Your comments can be of great value in helping us to improve our customer publications Please send any comments that you have to our Sales Department at GMI Contact details are provided inside the back cover of this handbook Instrument Service Repair contact details are also provided inside the back cover of this handbook COPYRIGHT This User Handbook is copyright of Gas Measurement Instruments Ltd GMI and the information contained within is for use only with the Oxygas 500 instrument Reproduction in whole or in part including utilisation in machines capable of reproduction or retrieval without written permission of Gas Measurement Instruments Ltd is prohibited Reverse engineering is not permitted LIABILITY Every care has been taken in the preparation of this document but GMI Ltd do not accept any responsibility for errors or omissions and their consequences Information in this document is subject to change without notice This document does not constitute a specification or basis for a contract Your statutory rights under law are not affected MODIFICATION NOTICES GMI aim to notify customers of relevant changes in the product operation and maintain this manual up to date In view of the policy of continuous product improvement there may be operational differences between
21. OK Mode 2 Purge Switching ON with Button Two provides access to only 0 100 Vol Gas and 0 25 Oxygen for purge applications Switching On Press and hold Button One to turn the instrument on This initiates the instruments warm up cycle and switches on the pump Figure 3 2 displays the warm up cycle for the Oxygas 500 All LCD segments displayed dd v i VN UN SAMPLE STORE a CHECK ZERO FAULT BAT a O 000 4000 6000 8000 10000 Instrument Software type version ane Battery status Note Battery status is displayed Y y as either OK or LO at start up OK Figure 3 2 Warm Up 20 OPERATION Calibration Date Features At the end of warm up and before the Oxygas 500 instrument is ready for measuring the instrument will indicate on the display when the next calibration is due This will be displayed as month and year as shown in Figure 3 3 MIE Calibration Due February 2005 Alternate flash Figure 3 3 Calibration Date The re calibration interval pre set for all Oxygas 500 instruments is twelve 12 months This period can be altered as an option however you should ensure that the instrument is always within its calibration period prior to use An option which ensures that an out of calibration instrument is not used is the automatic switch off when overdue Switching Off the Instrument Pump A single press of Button One B when the pump
22. ave the functions shown in Figure B 7 SPAN Mode Single Press Double Press Hold Button 1 Increase Exit SPAN Set Point z Without CAL Button 2 Decrease T Exit SPAN Set Point With CAL Figure B 7 SPAN Mode Button Functions 8a In SPAN mode a single press of Button One will produce small incremental changes to increase display reading or a single press of Button Two will produce small decremental changes to decrease display reading until the displayed gas value corresponds to the concentration of the calibration gas 8b When required reading has been reached press Note and hold Button Two 2 to exit SPAN mode with calibration The display may jump above and below required reading momentarily as the instrument performs the calibration If for any reason you require to exit SPAN mode without calibration of the instrument press and hold Button One Be B 7 OXYGAS 500 USER HANDBOOK 9 The calibrated instrument display will now return to CAL mode display as shown in Figure B 8 L 1 SAMPLE 0 20 40 60 EERTE ETETE ET Figure B 8 50 LEL Display 10 Make sure that correct reading is displayed before disconnecting the calibration gas then disconnect tubing from instrument inlet and turn regulator valve on calibration gas cylinder in a clockwise direction to turn off gas flow 11 Make sure that the regulator valve is in the fully c
23. den in een ontvlambare atmosfeer Oxygas 500 instrumenten zijn gecertifieerd zoals EEx iad IIC T4 20 C lt Tamb lt 50 C BAS01ATEX2292 12 ASI UL Klasse 1 Groepen A B C en D Dit toestel is ontwikkeld en gemaakt om ons te beschermen tegen voorvallen zoals beschreven in paragraaf 1 2 7 van Annex Il van de ATEX 94 9 EC Elke recht op een claim met betrekking tot de betrouwbaarheid of de daardoor veroorzaakte schade van welke derde partij dan ook aan GMI zal verworpen worden indien de waarschuwingen genegeerd zijn PLAATSEN VAN GEBRUIK Blootstelling aan bepaalde chemicali n kan resulteren in een verlies van gevoeligheid van de brandsensor Indien deze omgevingen bekend zijn of vermoed worden is het aanbevolen om meer frequente check ups uit te voeren Chemische stoffen die een 0 22 Oxygas 500 Gebruiksaanwijzing verlies van gevoeligheid kunnen veroorzaken zijn siliconen lood halogenen en zwavel Gebruik het instrument niet in een schadelijke atmosfeer met meer dan 21 zuurstof Het omhullende materiaal is polypropyleen en dit mag niet blootgesteld worden aan omgevingen die waarschijnlijk resulteren in mechanische of thermische degradatie of schade veroorzaakt door contact met aggressieve substanties Bijkomende bescherming kan nodig zijn in omgevingen waar het omhulsel van het instrument onderhavig kan zijn aan schade GEBRUIKSBOODSCHAPPEN FOUTMELDINGEN Verschillende boodschappen kunnen op
24. di sensibilit sono a base di silicone piombo alogeno e solfuri Lo strumento non deve essere usato in C 10 Oxygas 500 Istruzioni Operative una area potenzialmente pericolosa contenente piu del 2190 di Ossigeno La scocca in polipropilene non deve essere esposta in ambienti che possono essere responsabili di una degradazione meccanica termica oppure a contatto con sostanze corrosive Una protezione aggiuntiva pu essere richiesta se lo strumento debba includere la possibilit di essere danneggiato MESSAGGI OPERATIVI GUASTO Vari messaggi possono comparire sul display dello strumento per indicarne lo stato SAMPLE Indica che la pompa in funzione quindi lo strumento sta campionando OFF Indica la fase di spegnimento II comando pu essere interrotto premendo un qualsiasi pulsante della tastiera SAMPLE FAULT Indica un problema con il flusso dell aria campionata dovuto a una ostruzione della linea di campionamento ingresso d acqua filtro in cotone intasato oppure un guasto alla pompa Pu anche indicare un problema al circuito del sensore di flusso In modalit di misura la pompa in questi casi si ferma automaticamente Verificare i filtri e la linea di campionamento e riavviare la pompa con il primo pulsante CHECK ZERO Indica che potrebbe esserci uno spostamento dello zero dovuto alla presenza di gas nell aria Spegnere e riaccendere lo strumento in aria pulita ZERO FAULT Indica che lo zero f
25. e drifttiden med alkalinebatterier ca 60 minuter Denna tid kan dock variera mycket beroende p fabrikat temperatur m m Med laddningsbart batteri visas BAT n r det terst r ca 30 minuter Vartefter batterisp nningen forts tter att sjunka blinker BAT FAULT Slutligen visas OFF och instrumentet st nger av sig automatiskt Batteriet skall omedelbart bytas eller laddas BAT FAULT Betyder att batteriet skall bytas omedelbart 1 Betyder ven efter att instrumentet satts I g ng att informationen ang ende kalibrering r felaktig Instrumentet skall l mnas f r service C 15 0 Gas MEASUREMENT INSTRUMENTS LTD BRUKSANVISNING KNAPP 1 KNAPP 2 RANGE Sl p CGI Alternativ 1 LEL v xlar automatiskt till vol Gas Oxygen Tryck och h ll nere knapp 1 f r att s tta p instrumentet och pumpen Detta startar en automatisk kontroll och uppv rmning av instrumentet Sl p Purge Alternativ 2 B EER 0 till 100 vol Gas samt Oxygen B B B CHECK an f r Purge applications Tryck och hall knapp 2 Be Alla tecken visas i displayen att starta instrumentet och Instrument Software pumpen Detta startar en type version automatisk kontroll och uppv rmning av instrumentet och tf ljs av Instrumentets beteckning mjukvaruversion och batteristatus OK BAT H refter visas med m nad MNC NOR LUC och r n r instrumentet skall kalibreras t ex
26. e mode Typical Purge to ao zl 95 Natural Gas Filter 4 Handle Pressure Gauge gt Pressure Gauge Vent Block Block Figure 1 6 Direct Purging De commissioning OXYGAS 500 USER HANDBOOK When commissioning the instrument will start in the LEL range and autorange up automatically to Gas when the LEL reaches around 110 or the Gas is greater than about 5 596 Thus above these values of gas in air the instrument will be in the Gas range and the reading increase up to the final purge reading of gt 95 gas 85 9596 depending on calibration In direct purging to air the instrument in the measure mode will start off in Gas and reduce the reading in the gas range until it autoranges back to LEL at around 4 5 CH4 in air or 99 LEL In the measure mode the LEL and Vol ranges have autotracking which forces the LEL and Gas signals to be the same In the Purge mode the instrument will only have O2 and Gas ranges and autotracking is disabled With 2 CH4 or 40 LEL the Oxygen content of the sample is only reduced by around 0 496 O2 which may be difficult to measure accurately THE MEASURE MODE SHOULD NOT BE USED FOR INDIRECT PURGING INTRODUCTION Indirect Purging The following diagram shows a typical indirect purging operation using a Nitrogen cylinder Typical Purge to 7 5 Natural Gas Pressure Gauge X Vent Pressure Gauge DI Block Block Figure 1 7 Indirect Purgin
27. ed by GMI For more details contact GMI or an authorised distributor 35 OXYGAS 500 USER HANDBOOK Calibration Validity Calibration validity is the responsibility of the user Under normal operating conditions a 12 month period can be expected This is no guarantee however as the precise application of the product is unknown to GMI Individual codes of practice may dictate shorter periods Regular checking establishes a pattern of reliability and enables the calibration check period to be modified in line with operational experience The higher the risk the more frequently calibration should be checked 36 ACCESSORIES Accessories Supplied with the Oxygas 500 Instrument Part Number 42501X 42501XR Part Number 42247 12370 2 12451 12712 12480 12481 10077 12688 42621 Description Carrying Case Shoulder Harness 4mm Hex Driver Clear Sample Line x 1 5 metres 4ft 10ins approx Plastic Probe Solid End 35cm 1ft 2ins approx Probe Handle c w Filters Cotton Particulate Filters Box of 10 x 2 Sample Line Adaptor User Handbook Additional Accessories Available Part Number 13184 13317 13322 Description Standard Charger 240V Power Supply UK PLug Standard Charger 220V Power Supply Euro Plug Standard Charger 110V Power Supply USA Plug 37 OXYGAS 500 USER HANDBOOK 12888 13179 42121 42122 42123 12889 42124 13180 13320 13321 12241 13100 1
28. en End 69cm 2ft 3ins approx Probe Handle Probe Handle Adaptor use with 13563 or 13565 Bellows Cup Probe Swan Neck Probe Probe Shroud c w Skids use with 13565 In Line Hydrophobic Filter Holder Gasurveyor 500 Standard Accessory Pack Consisting of Gasurveyor 500 Carrying Case Standard Probe Probe Handle Assembly Sample Line Adaptor 2 Packs Cotton Filters Gasurveyor 500 Gas Industry Survey Accessory Pack Consisting of Gas Industry Survey Carrying Case Large Probe Handle Assembly Probe Handle Adaptor Bellows Probe Note Large carrying case has space for special probes e g Swan Neck Note For other sampling probes and accessories and for calibration gases contact GMI Ltd 39 OXYGAS 500 USER HANDBOOK 40 ADDITIONAL INFORMATION Training Training courses are available on all our products Contact our Marketing Department for further details Tel 44 0 141 812 3211 Fax 44 0 141 812 7820 e mail salesQgmiuk com World Wide Web Visit our web site at www gmiuk com 41 OXYGAS 500 USER HANDBOOK 42 TYPICAL OPERATING PARAMETERS Typical operating parameters are as follows Gas Range Resolution Zero Accuracy Range Stability LEL Oto 10 0 196 0 596 10to 100 1 N A 2 1 LEL Volume Oto 100 1 2 1 1 Gas Gas Oxygen Oto 21 0 1 0 5 0 5 3 reading 21t025 1 N A 0 5 3 reading Notes Allthe values above are at normal tempe
29. ere appropriate changed to ensure a clean sample path If water is drawn into the instrument any filter which has been contaminated must be cleaned or replaced See Filter Replacement in Section 4 OPERATOR MAINTENANCE 16 GENERAL INFORMATION Liquid Crystal Display LCD The LCD shows the current gas readings in both analogue and digital form together with operational and status information The display is protected by a toughened glass cover Backlighting is provided to enable the display to be seen under low ambient light conditions Before Use Checks The following checks should be carried out before using the instrument on site The instrument is clean and in good condition The batteries have sufficient power left in them for the intended use of the instrument The filters are clean and in good condition The sample line and any accessories are in good condition and leak free All gas ranges are operational and zeroed cor rectly The calibration is still valid 17 OXYGAS 500 USER HANDBOOK 18 OPERATING INSTRUCTIONS Modes of Operation The instrument has two modes of operation which are accessed by switching the instrument ON with either Button One or Button Two See Figure 3 1 below Figure 3 1 Instrument Front Plate Mode 1 CGI Switching ON with Button One provides three gas ranges a LEL autoranging to Volume Gas and b Oxygen Range 0 25 19 OXYGAS 500 USER HANDBO
30. es 30 Filter Replacement i 32 CALIBRATION 2 35 Calibration Validity era 36 ACCESSORIES sees 37 ADDITIONAL INFORMATION 41 BEC e E 41 World Wide etr nones 41 TYPICAL OPERATING PARAMETERS A 1 sini e n A 2 Vie 2 Operating Temperature A 2 Humd eee Construction Ssampling SyStem atten 2 Power S urce 2 vii OXYGAS 500 USER HANDBOOK FIELD CALIBRATION B 1 Selectable Ranges B 3 Entering FM antice etia B 3 Zeroing the Instrument ennen bedres B 4 Field Calibration B 5 Quiitting FOM ictor eei redd B 9 Quit And Save Changes B 9 Quit Without Saving B 9 OPERATING INSTRUCTIONS en C 1 English oot pie eet etc Deutsch German L italiano Italian Svensk Swedish Dansk Danish ono etes Nederlands Dutch viii INTRODUCTION The Oxygas 500 is a two button instrument designed to measure Lower Explosive Level Volume flammable gas and Oxygen for CGI leak detection and purge operati
31. estel zelf uit De batterijen moeten dan onmiddellijk vervangen worden BAT FAULT Indicatie dat de batterijen onmiddellijk moeten vervangen worden 1 Indicatie die ook na aanschakelen van de stroom kan verschijnen dat een kalibratiegegevensfout werd opgespoord Het instrument moet binnen voor onderhoud C23 Ci 2 0 Gas MEASUREMENT INSTRUMENTS LTD GEBRUIK KNOP 1 KNOP 2 V RANGE Schakel AAN CGI Mode 1 LEL autobereik naar volume gas zuurstof Druk op knop 1 X en houdt ingedrukt om instrument en pomp aan te schakelen Dit zorgt voor opwarming 8888 Schakel Mode 2 0 tot 10096 volume gas zuurstof voor reinigingstoepassingen Alle LCD segmenten worden Druk k 2 3 houdt ruk op knop Ka en hou gation ingedrukt om instrument en pomp aan te schakelen Dit zorgt voor opwarming Instrument Software type versie Alle getoonde LCD segmenten worden gevolgd door het instument type en de software versie en daarna de batterij status nu UK zoals getoond BAT Dan toont het instrument met maand en jaar wanneer de P GUE volgende kalibratie moet Afwisselend plaatsvinden februari er 2005 bijvoorbeeld C 24 Oxygas 500 Gebruiksaanwijzing Het CAL DUE scherm wordt gevolgd door het huidig gedetecteerde gas Nota In de Oem oo reinigingstoestand is de T T LAS FU 2 PURGE geactiveerd
32. g De commissioning In this situation Nitrogen or an inert gas is used to purge the vessel of flammable gas the above illustration does not fully describe purging only its influence on the instrument For indirect operations the instrument must be used in the purge mode In decommissioning the pipe the end point is the of Gas left in the pipe when it has mainly been displaced by Nitrogen A typical figure for this would be 7 5 8 CH4 to give a mixture that when mixed with air would not form an explosive mixture Since there is no air in the pipe Oxygen measurement cannot be used apart from as a safety check Nitrogen has a different thermal conductivity to air and hence the reading for 100 Nitrogen is different than for 100 Air 20 O2 80 N2 OXYGAS 500 USER HANDBOOK Since 100 air is used to set zero at switch on it is the zero that is affected by the difference between air and Nitrogen There is a typical difference in reading between these two conditions of around 5 on the Volume scale when calibrated in Methane on an Oxygas 100 Nitrogen gives a negative reading of around 5 when compared with an air zero and obviously the 20 O2 reading drops to O in 100 N2 To enable the influence of the Nitrogen to be seen and compensated for in this condition when the Oxygas is placed in the PURGE mode negative readings are enabled on the Gas scale The instrument will read approximately 5 when in a 100 N2 atm
33. het LCD scherm verschijnen om de status van het instrument aan te duiden SAMPLE Indicatie dat de pomp draait en dat het instrument meet OFF Indicatie dat het instrument bijna gaat uitschakelen Dit kan geannuleerd worden door een enkele druk op eendert welke knop SAMPLE FAULT Indicatie van een probleem met de instroom van het instrument doordat de invoer geblokkeerd is door waterinsijpeling een verstopte filter of falen van de pomp Bij meting stopt de pomp automatisch De invoer filters etc moeten gecontroleerd worden op waterinsijpeling of verstopping en knop n moet dan ingeduwd worden om de pomp te herstarten CHECK ZERO Indicatie dat het nulpunt gewijzigd kan zijn door de aanwezigheid van gas Schakel het instrument uit en opnieuw aan in frisse lucht ZERO FAULT Indicatie dat het nulpunt buiten de kalibratielimieten valt Schakel het instrument uit en opnieuw aan in frisse lucht Indien de foutmelding niet verdwijnt breng het toestel terug voor onderhoud BAT Indicatie dat de batterijen weldra aan vervanging toe zijn Nu resten er nog ongeveer 60 minuten met alkaline batterijen alhoewel dit erg afhankelijk is van de batterijenproducent temperatuur gebruik etc Met herlaadbare batterijen duidt BAT nog ongeveer 30 minuten resterende gebruiksduur aan Naarmate de batterijkracht daalt knippert op het LCD scherm BAT FAULT Daarna zal de LCD automatisch OFF vertonen en schakelt het to
34. i D Dansk Danish C 1 De commissioning 7 Deutsch German C 1 Direct Purging 7 Display A 2 Disposable Alkaline LR20 Dry Cell Batteries 15 DISPOSAL ADVICE i E English C 1 Entering FCM B 3 OXYGAS 500 USER HANDBOOK F FAULT BAT 25 Fault Flags 24 FAULT SAMPLE 24 FAULT ZERO 24 FCM B 1 B 3 B 9 features 11 FIELD CALIBRATION B 1 Field Calibration Procedure B 5 Filter Replacement 32 Filters 16 Flatbed Charger 28 G GENERAL INFO 13 Greek C 26 H HANDLING ii Humidity A 2 IMS 35 Indirect Purging 9 INFORMATION ADDI TIONAL 41 INFORMATION GENERAL 13 INSTRUCTIONS OPERAT ING C 1 Instrument Pump 21 INTRODUCTION 1 L LCD 17 A 2 LEL 0 to 100 13 LIABILITY i Liquid Crystal Display 17 L italiano Italian C 1 MAINTENANCE OPERA TOR 27 Messages Operator 24 Modes of Operation 19 MODIFICATION NOTICES i N Nederlands Dutch C 1 NiCd A 2 NOTICES MODIFICATION i O OFF 24 OPERATING INSTRUC TIONS 19 C 1 OPERATING PARAM ETERS A 1 Operating Temperature A OPERATOR MAINTE NANCE 27 Operator Messages 23 24 Overview 2 Oxygen 14 P PARAMETERS OPERAT ING A 1 Power Source A 2 Pump Instrument 21 Purge Mode 22 Purging 4 Purging Direct 7 Purging Indirect 9 Q Quit And Save Changes B 9 Quit Without Saving Changes B 9 Quitting FCM B 9 R Range Changing 23 ranges 1 Ranges of Operation 13 Rechargeable Battery Pac
35. ica della batteria 6 Verificare lo Zero in aria pulita SICUREZZA Lo strumento deve essere regolarmente calibrato da personaleistruito in un area sicura Batterie Le batterie Alkaline o il pacco batteria ricaricabile devono essere sostituite ricaricata in un area sicura e fissate correttamente allo strumento prima dell uso Mai utilizzare batterie danneggiate oppure sottoporle ad un alta temperatura Utilizzare solamente ricambi Se lo strumento rivelasse del gas seguire le proprie pro cedure organizzative e le indicazioni operative del caso La camera di combustione amp a prova di fiamma e non deve essere aperta in presenza di gas infiammabile nell atmosfera Oxygas 500 uno strumento certificato con EEx iad IIC T4 20 C lt Tamb lt 50 C BASO1ATEX2292 2 G SS 0 UL Class 1 Groups A D Questo equipaggiamento progettato e costruito per proteggere contro altri pericoli come descritto nel paragrafo 1 2 7 of An nex Il of the ATEX Directive 94 9 EC Ogni diritto di reclamo relativo alla responsabilit del prodotto o a danni verso terzi contro GMI si rimuove se non vengono osservate le norme di sicurezza AREE D USO L esposizione ad agenti chimici condiziona la sensibilit del sensore del gas Quando tali ambienti sono conosciuti o sospettati amp raccomandabile una verifica pi frequente della misura componenti che possono causare una perdita
36. ion OFF ON CGI Button 2 Next Range Switches LEL VOL O LEL VOL CGI Instrument VOL O VOL Purge ON Purge 23 OXYGAS 500 USER HANDBOOK Operator Messages Fault Flags Various messages can appear on the LCD screen to indicate instrument status SAMPLE This indicates that the pump is running and the instrument is sampling OFF This indicates that the instrument is about to switch off This command can be cancelled by a single press of any button SAMPLE FAULT This indicates a problem with the instrument s flow due to the sample path being blocked water ingress a blocked filter or pump failure In Measure mode the pump stops automatically The sample line filters etc should be checked for water ingress or blockage and Button One should then be pressed to restart the pump CHECK ZERO This indicates that there may have been a zero shift due to the presence of gas Switch off the instrument and switch on again in fresh air ZERO FAULT This indicates that the zero is outwith its calibration limits Switch the instrument off and then on again in fresh air If the fault does not clear return the instrument for servicing 24 OPERATION BAT This indicates that the batteries will soon require replacement At this point there will be approximately 60 minutes operation left in a set of alkaline batteries although this figure will vary depending on batter
37. is running turns the pump off and stops sampling Pressing button one again turns the pump back on 21 OXYGAS 500 USER HANDBOOK Switching On in Purge Mode To switch on in Purge mode press and hold Button Two E The Oxygas 500 will initiate the warm up sequence as explained previously This mode uses the Volume Gas and Oxygen ranges only When in purge mode the PURGE flag is activated on the display as shown in Figure 3 4 Alternate flash Figure 3 4 Purge Mode Switching Off A double press of Button One turns the instrument off immediately The instrument switches off automatically after 30 minutes OFF is shown in the top right hand corner of the display Pressing any button cancels this automatic switch off The instrument will then allow another 30 minutes of use This 30 minute period is set as a default The switch off time may be altered to any time between 1 and 1000 minutes 22 Changing Range OPERATION Each single press of Button Two changes the gas range selected The display cycles through the available ranges as follows LEL Vol Gas Oxygen LEL Vol Gas in CGI mode Volume Gas Oxygen Volume Gas in Purge mode Note The instrument by default auto ranges between LEL and Volume Gas Summary of Button Operation Double Press and M Single Press de g Press Hold Button 1 Toggles Pump Switches Switches On Off Instrument Instrument during operat
38. ixtures If insufficient fuel is present e g the mixture is too lean to cause ignition then the atmosphere is safe The minimum amount of fuel in air that can cause an explosion is called the Lower Explosive or Flammable Limit LEL LFL If the mixture has too much fuel and hence insufficient air then again combustion cannot occur The maximum fuel in air ratio where combustion can occur is called the Upper Explosive or Flammable Limit UEL UFL These figures assume normal atmospheres gas in air 21 Oxygen in 79 Nitrogen If either the 02 or the N2 ratio varies significantly then different conditions apply to the flammable limits and the instrument application The normal measurement for gas in air atmospheres is LEL This measurement is not used in inert atmospheres where the 96 Gas or Oxygen measurement must be used OXYGAS 500 USER HANDBOOK AIR UEL 100 Air 0 Air RICH 0 Gas 100 Gas o o LEL GAS Figure 1 3 Flammability The Oxygas 500 uses a catalytic sensor to measure LEL which requires air to be present and a thermal conductivity sensor to measure the Volume range Purging The opening of a pipeline or vessel causes a mixing of flammable products such as gas with air creating potentially flammable mixtures It may not be possible to ensure that all sources of ignition are removed hence there is a need to avoid the formation of flammable mixtures Two types of purging are ge
39. k 16 27 Recharging the Battery Pack 30 Replacement Filter 32 Replacing Alkaline LR20 Dry Cell Batteries 30 Replacing the Battery Pack 29 Resolution A 1 REVISION RECORD iii S SAFETY ii SAMPLE 24 SAMPLE FAULT 24 32 Sampling System A 2 Save Changes B 9 Selectable Ranges in FCM B 2 Size A 2 Smart Charger 28 SOFTWARE i Standard Charger 27 STORAGE ii Summary of Button Operation 23 Svensk Swedish C 1 Switching Off 22 Switching Off the Instru ment Pump 21 Switching On 20 Switching On in Purge Mode 22 T Training 41 TRANSIT ii OXYGAS 500 USER HANDBOOK V Validity Calibration 36 Volume Gas 14 Weight 2 World Wide Web 41 2 Zero 1 ZERO CHECK 24 ZERO FAULT 24 Zeroing the Instrument B 4 GMI Head Office Inchinnan Business Park Renfrew PA4 9RG Scotland U K Telephone 44 0 141 812 3211 Fax 44 0 141 812 7820 e mail salesQgmiuk com http www gmiuk com GMI Instrument Service Repair Centre Crownhill 25 Cochran Close Milton Keynes MK8 OAJ England U K Telephone 44 0 1908 568867 Fax 44 0 1908 261056 e mail service gmiuk com KIDS
40. k at n r 4 7111 instrumentet purge F e mode vil purge blinke p displayet flash Pumpe Et tryk p knap 1 v n r pumpen kgrer stopper pumpen og m lingen Et tryk mere p knap 1 starter pumpen og m lingen igen Skifte m ling Et hvert tryk p knap 2 x og gas malingen skifter Displayet viser m lingerne p felger m de LEL Vol Gas Ilt LEL Vol Gas ect CGI mode 1 Vol Gas Ilt Vol Gas ect Purge mode 2 Sluk Oxygas Tryk 2 gange p knap 1 C21 0 cas MEASUREMENT INSTRUMENTS LTD CHECKLIST Kijk na of het instrument geen zichtbare fouten vertoont Kijk de accessoires na Lees en begrijp het handboek voor gebruik Schakel het toestel aan zie volgende bladzijde Kijk het batterijniveau na Controleer NUL in open lucht VEILIGHEID De instrumenten regelmatig nagekeken en gekalibreerd worden door daartoe opgeleid personeel in een veilig lokaal Batterijen Alkaline batterijen en herlaadbare batterijen moeten vervangen en heropgeladen worden in een veilige omgeving en moeten precies passen voor gebruik Gebruik nooit beschadigde batterijen of stel ze niet aan extreme A hitte bloot Alleen GMI wisselstukken mogen gebruikt worden Indien het instrument gas detecteert volg dan uw eigen bedrijfsprocedure en gebruiksaanwijzing De verbrandingskamer is een brandvrij onderdeel en mag niet geopend wor
41. losed position Off then disconnect the regulator from the gas cylinder turn regulator body in a counter clockwise direction 12 Replace the cap on the calibration gas cylinder 13 Repeat steps 1 to 12 for each range to be calibrated otherwise quit FCM See QUITTING FCM for further details FIELD CALIBRATION Quitting FCM Quit And Save Changes 1 Press and hold Button Two to save CAL data 2 Double press Button One to exit FCM Note When all ranges have been zeroed calibrated correctly CAL data saved and followed by CAL mode exit the new CAL DUE date will be set to 12 months from now This can be altered to a different frequency via the set up program e g 6 months from now Contact GMI for details Quit Without Saving Changes 1 Double press Button One to exit FCM Note When you exit the FCM without saving the new CAL data the old calibration data and calibration date remains in the instrument memory OXYGAS 500 USER HANDBOOK B 10 OPERATING INSTRUCTIONS The following multi language instructions provide the user with a quick guide to the operation of the KD oxygas 500 instrument Each language and pages reference is as follows English pages C 2 to C 5 Deutsch German pages C 6 to C 9 L italiano Italian pages C 10 to C 13 Svensk Swedish pages C 14 to C 17 Dansk Danish pages C 18 to C 21 Nederlands Dutch pages C 22 to C 25 e Greek pages C 26 to 0 29
42. me heat See Section 4 OPERATOR MAINTENANCE Only GMI replacement parts should be used If the instrument detects gas follow your own organisation s procedures and operational guidelines The combustion chamber is a flameproof assembly and must not be opened in the presence of a flammable atmosphere Gas can be dangerous and care should always be taken in its use Oxygas 500 instruments are certified as EEx iad IIC T4 20 C lt Tamb lt 50 C BASO1ATEX2292 2G UL Class 1 Groups A B C and D This equipment is designed and manufactured to protect against other hazards as defined in paragraph 1 2 7 of Annex II of the ATEX Directive 94 9 EC Any right of claim relating to product liability or consequential damage to any third party against GMI is removed if the warnings are not observed AREAS OF USE Exposure to certain chemicals can result in a loss of sensitivity of the flammable sensor Where such environments are known or suspected it is recommended that more frequent response checks are carried out The chemical compounds that can cause loss of sensitivity include Silicones Lead Halogens and Sulphur Do not use instrument in potentially hazardous atmospheres containing greater than 2196 Oxygen The enclosure material is polypropylene and must not be exposed to environments which are liable to result in mechanical or thermal degradation or to damage caused by contact with aggressive substances Additi
43. mechanischen Beschaedigungen fuehren und Waerme enthalten zu vermeiden Weiters ist das Instrument vor Beschaedigungen zu schuetzen Betriebshinweise Stoerungsmeldungen Verschiedene Anzeigen am Display geben den Geraetestatus an SAMPLE Pumpe laeuft und Messung erfolgt OFF Instrument im Abschaltmodus 1x Dr cken einer beliebigen Taste unterbricht diesen Vorgang SAMPLE FAULT Probenleitung Filter oder Pumpe verlegt ev Wassereintritt Pumpenstop automatisch Filter Leitung etc pruefen Mit Taste 1 Pumpe wieder starten CHECK ZERO Nullpunktdrift durch Einschalten in nicht gasfreier Umgebung Geraet Ausschalten und wieder Einschalten in Frischluft ZERO FAULT Nullpunkt ausserhalb der limitierten Werte Geraet Ausschalten u wieder Einschalten in Frischluft wenn der Fehler bleibt Geraet zum Service geben BAT Batterien sollen bald gewechselt werden Betrieb max 60 min mit Alkaline Batterien abhaengig vom Hersteller Verwendung Temperatur etc Betrieb max 30 min mit aufladbaren Batterien Wenn die Batteriespannung laufend absinkt blinkt BATFAULT im Display anschliessend erscheint OFF und das Geraet schaltet ab Batteriewechsel erforderlich BAT FAULT Batteriewechsel erforderlich 1 Kalibrierfehler Geraet zum Service C7 0 amp cas MEASUREMENT INSTRUMENTS LTD Bedienung TASTE 1 E TASTE dis E Einschalten CGI Modus 1 LEL automatische Umschaltung auf Volume Gas Sa
44. mmended that more frequent response checks are carried out The chemical compounds that can cause loss of sensitivity include Silicones Lead Halogens and Sulphur Do not use instrument in potentially hazardous atmospheres containing greater than 2196 Oxygen C2 Oxygas 500 Operating Instructions The enclosure material is polypropylene and must not be exposed to environments which are liable to result in mechanical or thermal degradation or to damage caused by contact with aggressive substances Additional protection may be required in environments where the instrument enclosure is liable to damage OPERATOR MESSAGES FAULT FLAGS Various messages can appear on the LCD screen to indicate instrument status SAMPLE Indication that the pump is running and the instrument is sampling OFF Indication that the instrument is about to switch off This command can be cancelled by a single press of any button SAMPLE FAULT Indication of a problem with the instrument s flow due to the sample path being blocked water ingress a blocked filter or pump failure In Measure mode the pump stops automatically The sample line filters etc should be checked for water ingress or blockage and Button One should then be pressed to restart the pump CHECK ZERO Indication that there may have been a zero shift due to the presence of gas Switch off the instrument and switch on again in fresh air ZERO FAULT Indication that the zero is
45. nerally used Direct Purging Displacement of fuel by air or vice versa Indirect Purging Displacement of fuel by inert gas followed by displacement by air or vlce versa Indirect purging is the most common since it avoids flammable mixtures being created INTRODUCTION 100 Purge Flammable Area 100 ed 100 Air Increasing fuel Fuel Principle of Purging Figure 1 4 Principle of Purging When the pipe has been open to atmosphere for maintenance or when first being put into service there is a requirement to introduce flammable gas into the pipe in a controlled way to avoid large flammable mixtures being created and to avoid air being introduced into the network This is done by avoiding air and fuel mixing by introducing an inert or purge gas into the system so that air and fuel don t meet This gas is normally Nitrogen or a mixture of Nitrogen and Carbon Dioxide OXYGAS 500 USER HANDBOOK The following diagram illustrates a typical direct purging operation and is not intended to demonstrate the purge technique but illustrate the effect on the instrument reading Pressure Pressure Gauge Gauge Typical Purge to 95 Natural Gas Block Block Figure 1 5 Direct Purging Commissioning Commissioning In the direct purge mode for commissioning the pipe would contain air and the pipe would be purged with Natural Gas The Oxygas is zeroed in air and would be switched on in the purge m
46. nsboken innan Du anv nder instrumentet 4 Sl p instrumentet se nedanst ende 5 Kontrollera batteriets kapacitet 6 Kontrollera Nollan I frisk luft S KERHET Instrumentet skall regelbundet kontrolleras och kalibreras av kunnig personal I h rf r avsedd milj Batterier Alkaline batterier eller Laddningsbara batteripaket m ste laddas eller bytas utanf r Ex klassat omr de och monteras p r tt s tt Anv nd aldrig skadat batteri Det f r ej heller uts ttas f r h ga temperaturer Endast GMI orginaldelar f r anv ndas Om instrumentet reagerar f r gas skall Ert f retags normala rutiner f ljas M tkammaren f r br nnbar gas r en Ex klassad enhet och f r ej ppnas d risk f r s dan gas f religger Oxygas 500 instrumentet r klassat enligt EEx iad IIC T4 20 C lt Tamb 50 C ATEX2292 Ey 126 SS UL Class 1 Groups A B C and D Denna utrustning r konstruerad och tillverkad f r att skydda mot andra risker n definitionen paragraf 1 2 7 i Annex Il i ATEX Direktivet 94 9 EC All r tt till skadest nd med h nvisning till produktansvar eller skada hos tredje man gentemot GMI upph r om denna varning ej beaktas C 14 Oxygas 500 Handhavande ANV NDNINGSOMR DE Exponering f r vissa kemikalier kan resultera I att sensorn f r br nnbara gaser skadas I s dan atmosf r rekommenderas att ofta kontrollera instrumentets k nslighet De kemiska substanser som kan o
47. ockwise hand tight See Figure B 5 for details Valve Counter clockwise to increase gas flow Clockwise to reduce gas flow Indicator Tubing connects en iator to instrument gu Gas cylinder Figure B 5 Connecting Gas OXYGAS 500 USER HANDBOOK 4 5 6 7 8 Turn the regulator valve counter clockwise to open the valve slightly Make sure that the gas is flowing before connecting the sample tubing to the instrument otherwise an instrument sample fault may occur Connect tubing from regulator to instrument inlet then adjust the regulator valve to maintain a constant flow of gas counter clockwise to increase flow and clockwise to decrease The correct flow rate is achieved when the ball in the indicator tube floats just above its resting position Wait for the instrument gas reading to settle If the displayed reading corresponds to the concentration of calibration gas i e 5096 LEL 2 596 Methane in Air proceed to paragraph 10 If the displayed reading does not correspond to the concentration of calibration gas i e 5096 LEL 2 596 Methane in Air press and hold Button One to enter SPAN mode SPAN mode is indicated by the selected range in this case LEL and SPN alternating in the display as shown in Figure B 6 SAMPLE LI 60 20 40 INTNER ETI Figure B 6 SPAN Mode Display FIELD CALIBRATION In SPAN mode the instrument buttons h
48. ode In commissioning the pipe would typically be purged to 95 Natural Gas This would be a normal operation however in instruments calibrated in Methane you may only be able to attain 85 9096 reading depending upon the composition of the gas and the accuracy of calibration The Natural Gas may only contain 9096 or less of Methane hence the calibration gas and the measured gas should be as close together as possible in composition for purging or an allowance made for the difference INTRODUCTION De commissioning In purging down to air the typical figure would be 290 Methane or around 4096 LEL to end the purge In the Purge mode only the 96 Gas and the 02 ranges are available and normally the 96 Vol range can be used A reading can be taken from the 02 range for confirmation but care should be taken that the pressure applied to the cell is the same or similar to the zero point ie atmospheric pressure The pipe is being pressurised from atmospheric hence by inference the pressure will change The 02 cell can be pressure transient sensitive so care should be taken to ensure that the pressure is maintained the same by means of suitable valves or flow orifices and time allowed for the transient effect to be minimised before a reading is taken Direct Purging Although it is normal to use the Purge mode of the Oxygas for purging in direct purging where there is no inert atmosphere in the pipe the instrument will operate in the Measur
49. onal protection may be required in environments where the instrument enclosure is liable to damage STORAGE HANDLING AND TRANSIT The batteries in the rechargeable pack contain considerable energy and care should be taken in their handling and disposal Battery packs should be removed if the instrument is stored for longer than 3 months The instrument is designed to handle harsh environments The sensing elements are sealed to IP54 and the rest of the instrument to IP64 If not subject to misuse or malicious damage the instrument will provide many years of reliable service The instrument contains electrochemical sensors with a life of 2 years Under conditions of prolonged storage the sensors should be removed The sensor contains potentially corrosive liquid and care should be taken when handling or disposing of the sensor particularly when a leak is suspected REVISION RECORD Date Pages Issue 1 All 25 05 04 Description Of Change New Handbook OXYGAS 500 USER HANDBOOK CONTENTS COPYRIGHT nire rie i rer i MODIFICATION NOTICES i SOFTWARE niic Er o rr nit e ces i DISPOSAL ADVIGE sn i SAFETY aghi ii AREAS OF USE inserieren ii STORAGE HANDLING AND TRANSIT ii iii INTRODUCTION a 1 oi tl 2 Combustible Gas Indicator Leak Detection 2 Purging GENERAL INFORMATION
50. ons The instrument is designed to the latest standards and is certified for use in Hazardous Areas XE Tri PEEN Figure 1 1 Oxygas 500 Instrument The Oxygas 500 contains the following ranges LEL Oto 100 Volume gas 0 to 100 e Oxygen 0 to 25 OXYGAS 500 USER HANDBOOK Overview This chapter provides a brief overview of the principles of operation of the instrument in its two modes of operation 1 Combustible Gas Indicator CGI Leak Detection 2 Purging This is not intended as operating instruction in the application of finding leaks monitoring atmospheres or practical purging operations In all cases you should follow your company and application specific training Combustible Gas Indicator Leak Detection When there is a fire or explosion there are usually three contributors as indicated in the following diagram i e Fuel Oxygen or Air and an Ignition Source FUEL IGNITION OXYGEN SOURCE Figure 1 2 Contributors to Fire Explosion INTRODUCTION In some applications all three sources are available e g a boiler burner In other applications where gas may be liable to escape or be present ignition sources are controlled e g hazardous or zoned areas In applications such as purging the Air or Oxygen source is controlled or excluded In normal operation where air is not excluded apart from displacement by the fuel itself fuel and air can mix causing potentially explosive m
51. osphere and the results will be influenced by the of N2 in the sample as the reading is reduced Typical Purge to 896 Pressure O Pressure Gauge Gauge Figure 1 8 Indirect Purging Commissioning Air to Inert 10 INTRODUCTION At an actual 5 CH4 in Nitrogen the influence of the Nitrogen on the Gas reading is around 95 of 5 gas 4 75 hence the actual meter reading will be around 0 25 At 7 5 the reading will be influenced by the zero shifting by 92 596 of 5 3 At an actual reading of 7 596 the mixture will be higher in concentration by around 2 5 3 gas These numbers still fall within the 3096 safety factor normally used GMI recommend that you take the time to study your instrument and where practical and with advice from your company s Purchasing Management departments highlight your particular instrument configuration The main features of the instrument are e Rugged carbon loaded polypropylene case sealed to IP54 rating and suitable for outdoor use e Two button operation allowing the user access to all features LCD with backlighting which displays the current gas readings in both digital and analogue forms together with operational and status information Directly interfaces with the GMI Auto Test Calibra tion Units 11 OXYGAS 500 USER HANDBOOK 12 GENERAL INFORMATION Ranges of Operation LEL 0 to 100 The LEL range indicates the explo
52. premuto il pulsante 2 LEER EETL CORET OTE gt p e r accendere lo strumento e la pompa Questo dar inizio al ciclo Instrument Software di accensione type version Tutti i segmenti del LCD si illuminano 5 i Segue poi sul display LCD il tipo di 7 U e strumento e la versione del Software poi lo stato delle batterie come vedi n K BAT C 12 Dopo lo strumento indica il mese e anno della prossima calibrazione dovuta CAL DUE esempio Febbraio 2005 Oxygas 500 Istruzioni Operative lt DUE mS flash Quindi il display dopo la CAL DUE segue con la lettura corrente del gas Nota Quando in modalit 2 viene attivato un messaggio sul display come vedi Pompa ON OFF Una singola pressione del pulsante 1 3 flash quando la pompa in funzione permette di fermarla Un ulteriore pressione del pulsante 1 aziona la pompa nuovamente Cambio di Scala Ogni pressione del pulsante 2 cambia la scala di lettura del gas Il ciclo disponibile viene visualizzato secondo questo ordine LEL Vol Gas Ossigeno LEL Vol Gas ecc CGI Modalit 1 Vol Gas Ossigeno Vol Gas ecc Spurgo Modalit 2 Spegnimento Una doppia pressione del pulsante 1 v spegne lo strumento C 13 0 cas MEASUREMENT INSTRUMENTS LTD CHECKLISTA Kontrollera att instrumentet ej har n gra synliga fel Kontrollera samtliga tillbeh r 3 L s och f rst instruktio
53. rature and pressure Humidity is between 0 and 95 RH non condensing Pressure changes at the inlet and exhaust are minimised as they may cause transient changes in reading A 1 OXYGAS 500 USER HANDBOOK Size 180mm 7 08 x 95mm 3 74 x 105mm 4 13 Weight 1 7kg 3 75lbs with alkaline batteries Operating Temperature 20 C to 50 C 4 F to 122 F Humidity 0 95 RH Construction Moulded polypropylene case protected to IP54 Display LCD containing Analogue display scaled 0 10 0 100 0 1000 or 0 10000 4 digit digital display 3 character range indication Operational flags Sampling System Integral pump with flow fail sensor The sample path is protected by the hydrophobic filter and automatic pump switch off Power Source 4 D size alkaline cells giving approximately 15 hours runtime at 20 C 68 F Rechargeble NiCd battery pack giving approximately 9 hours runtime at 20 C 68 F A 2 FIELD CALIBRATION Field calibration allows simple calibration to be carried out in the field without the use of additional test equipment Other calibration procedures require the use of the GMI Manual Calibration software or the Workshop System There are fundementals in terms of instrument calibration that should be noted The gas should be of known traceable quality and have total analysis The gas should be applied in the same manner as the instrument is used e g at a kno
54. rocedure som din organisation har foreskrevet Forbraendings kammer er brandsikker tilbeh r og m ikke bnes i almindelig atmosf re Ethvert krav i forbindelse med produkt ansvar eller f lge skade p tredje part imod GMI er fjernet hvis de ovenst ende forskrivelser ikke h ndh ves Oxygas 500 instrument er certificeret if lge EEx iad IIC T4 20 C lt Tamb lt 50 C BAS01ATEX2292 Ex 126 IS UL Class 1 Groups A B C and D Bruger omr der Afdaekning af bestemte kemikalier kan resultere i tab af f lsomheden i LEL sensoren Hvor disse omgivelser er kendte eller mist nkt anbefales det at foretage m linger oftere Den kemiske sammenseetning som kan resultere i tab af f lsomhed inkludere silikoner bly halogen og svovl Brug ikke instrumentet ved potentiel farlig atmosf re der indeholder mere end 21 ilt C 18 Oxygas 500 Bruger manual Bruger beskeder og fejl Forskellige beskeder tegn forekomme p displayet under brug SAMPLE fort ller at pumpen k rer og at instrumentet optager pr ver OFF Indikerer at instrumentet er ved at slukke Denne kommando kan afbrydes ved et tryk p en anden knap SAMPLE FAULT Fort ller at der er et problem under pr ve sugning som kan v re f lgende opsugning af skidt vand filter blokering eller eb fejl i pumpen Under m ling og purge stopper pumpen automatisk Tjek for disse fejl og tryk p knap 1 for at genstarte pumpen CHECK ZERO
55. rsaka f rs mrad reaktion r bl a Silikoner Bly Halogener and Sulfider Anv nd inte instrumentet d r oxygenhalten kan verskrida 21vol Instrumenthuset r tillverkat av polypropylen och f r ej uts ttas f r eller komma I kontakt med vissa kemikalier En ytterligare skyddsv ska kan vara n dv ndigt d instrumentet anv nds i speciella milj er MEDDELANDEN TECKEN I DISPLAYEN Olika besked visas I displayen f r att indikera instrumentets status SAMPLE Betyder att pumpen g r och instrumentet suger OFF Betyder att instrumentet h ller p att st ngas av Detta kommando kan avbrytas genom att trycka p n gon knapp SAMPLE FAULT Betyder att fl det inte r korrekt Detta kan bero p att sondslangen r blockerad v tska har sugits in i instrumentet filtret r igensatt eller fel p pumpen N r instrumentet k rs i Measure eller Purge l ge stanna pumpen automatiskt Sondslang och filter skall kontrolleras varefter knappen One trycks ner och terstartar pumpen CHECK ZERO Betyder att nolljusteringen ej kunnat utf ras p grund av n rvaro av gas St ng av instrumentet och terstarta det i ren luft ZERO FAULT Betyder att nollan ligger utanf r sin gr ns St ng av instrumentet och terstarta det i ren luft Om felet inte f rsvinner l mnas instrumentet f r service till kvalificerad personal BAT Betyder att batteriet snart beh ver bytas D detta meddelande visa r den terst end
56. sivity of the flammable gas in the sample This is displayed as a percentage of the lower explosive limit LEL of the gas For methane 100 LEL corresponds to 5 Volume methane in Air The instrument range is displayed in the top right corner of the display as LEL From 0 to 10 LEL the digital display resolves to 0 1 LEL From 10 to 100 LEL the digital display resolves to 1 LEL The analogue bar graph follows in 496 steps An example of the LEL display is shown in Figure 2 1 Autoranging will automatically switch the range to Volume Gas when 100 LEL is reached The detection principle for this range is a catalytic reaction EL ha mam E E p EX Figure 2 1 LEL Range 13 OXYGAS 500 USER HANDBOOK Volume Gas 0 to 100 This range displays the total volume of a specific flammable gas with respect to air The calibration gas is shown on the service label and for the purpose of this handbook is assumed to be methane Instruments calibrated for methane in air should only be used for measuring such mixtures To change the calibration gas e g from methane to propane the instrument must be recalibrated by suitably trained personnel On the Volume Gas range the instrument range is displayed in the top right corner of the LCD as GAS The digital display resolves the signal to 196 GAS with the analogue bar graph following in steps of 4 Figure 2 2 shows the Volume Gas display The detection principle for the
57. ter s proceed as follows 1 Unscrew the probe handle assembly Cotton Particulate Filter Hydrophobic Filter x E Probe Handle Assembly Figure 4 1 Filter Assembly 32 2 3 4 OPERATOR MAINTENANCE Remove the cotton particulate filter and discard Remove the hydrophobic filter Clean the probe handle to make sure that it is free from dirt and water Fit a new cotton particulate filter Fit the hydrophobic filter The yellow label on the filter fits against the yellow label on the probe handle Reassemble the probe handle assembly 33 OXYGAS 500 USER HANDBOOK 34 CALIBRATION The instrument has been calibrated for a particular flammable gas mixture Where any doubt exists the instrument should be returned to GMI or an authorised distributor for calibration Four methods of calibration are possible Note Field Calibration See APPENDIX B FIELD CALI BRATION for further details Manual Calibration The instrument can be linked to a PC running GMI Manual Calibration software Automatic Calibration The GMI Auto Test Calibra tion System allows calibration without manually changing gas cylinders The system links to a PC running GMI Workshop software The GMI Instrument Management System IMS provides all the facilities of the Auto Test Calibra tion System with the added feature of instrument database management The calibration systems above hardware and software are manufactur
58. tet und durch Fachpersonal kalibriert werden Alkali oder wiederaufladbare Batterien duerfen nur in Ex freier Zone gewechselt oder aufgeladen werden Sichere Befestigung vor Gebrauch pruefen Keine besch digten Batterien verwenden und grosse Hitzeeinwirkungen auf die Batterien vermeiden Nur Original GMI Ersatzteile verwenden Beim Auftreten von Gas die jeweils gueltigen Vorschriften befolgen Gas kann gefaehrlich sein und ist daher mit Vorsicht zu behandeln Die Messkammer ist flammensicher ausgef ehrt und darf nicht in Ex Zonen geoeffnet werd Oxygas 500 Instrumente sind zertfiziert nach EEx iad IIC T4 20 C lt bis lt 50 C BASO1ATEX2292 12 6 SS 00 UL Klasse 1 Gruppe und D Das Instrument ist zur geeignet zur Verwendung nach Paragraph1 2 7 Anh ll ATEX 94 9 EC Alle Haftungsansprueche gegen ber GMI entfallen wenn die Sicherheits hinweise nicht beachtet werden Oxygas 500 Bedienungshinweise Verwendungsgebiete Das auftreten von verschiedenen Chemikalien kann die Empfindlichkeit des Sensors fuer brennbare Gase beeinflussen Beim vorhandensein dieser Stoffe ist ein kuerzeres Serviceintervall erforderlich Folgende Komponenten fuehren zur verringerung der Sensorempfindlichkeit Silicone Halogene und Schwefel Das Instrument darf nicht in Athmosphaeren mit mehr als 2196 Sauerstoff verwendet werden Im Gehaeuseaufbau sind Polypropylenzusaetze enthalten es sind daher Umgebungen welche zu
59. uerstoff Taste 1 Druecken und Halten Geraet und Pumpe ein und die Selbsttestphase beginnt Einschalten Purge Modus 2 popop E 0 2000 4000 6000 8000 10000PPM 0 bis 100 Volume Gas Sauerstoff F r Sp lungs Purge Anwendungen Alle LCD Segmente werden kurz dargestellt Taste 2 Druecken und Halten Instrument Software Ger t und Pumpe ein und die type version Selbsttestphase beginnt die Instrument Type mi Cei Softwareversion OK und der Batteriezustand BAT sowie Monat und Jahr der naechst faelligen LHL QUE Kalibrierung diese Ane z B February 2005 keg C8 Oxygas 500 Bedienungshinweise Weiters wird das Kalibriergas angezeigt Hinweis Im Purge Modus blinkt die Anzeige PURGE laufend GAS PUR diese anzeige blinkt Pumpe Ein Aus Taste 1 1 Druecken Start bzw Stop der laufenden Pumpe und der Probenahme Erneutes Druecken startet die Pumpe wieder Messbereichswechsel Taste 2 1x Druecken wechselt den Messbereich Im Display wechselt folgende Anzeige LEL Vol Gas Oxygen LEL Vol Gas etc CGI Modus 1 Vol Gas Oxygen Vol Gas etc Purge Modus 2 Ausschalten Taste 1 2x Druecken C9 0 CAS MEASUREMENT INSTRUMENTS LTD PRIMA DELL USO 1 Verificare che lo strumento non abbia dei guasti 2 Verificare gli accessori 3 Leggere il manuale d uso 4 Accendere lo strumento vedi retro 5 Verifica della car
60. uori calibrazione Lo strumento deve essere spento e riacceso in aria pulita Se il guato permane inviarlo al Servizio Assistenza BAT Indica che le batterie dovrebbero al pi presto essere sostituite A questo punto le batterie Alkaline potranno approsimativamente durare 60 minuti bench questa condizione dipenda dal fabbricante dalle condizioni ambientali ecc Con il pacco batteria ricaricabile il messaggio BAT indica circa 30 minuti di autonomia operativa Quando la carica della batteria insufficiente il display visualizza il messaggio BAT FAULT Successivamente la pompa si spegne e compare la scritta OFF lo strumento si spegne in automatico Le batterie devono essere sostituite immediatamente BAT FAULT Le batterie devono essere sostituite immediatamente 1 Questo messaggio che pu comparire durante la fase d accensione indica che amp stato rilevato un errore di calibrazione Inviare lo strumento al Servizio Assistenza C 11 0 cas MEASUREMENT INSTRUMENTS LTD OPERAZIONI KD LU X PULSANTE 2 OXYGAS 500 RANGE Accensione CGI Modalit 1 LEL autoranging con il Volume Gas Ossigeno Tenere premuto il pulsante 1 IV per accendere lo strumento e la pompa Questo dar inizio al ciclo di accensione dello strumento Accensione Spurgo Modalit 2 100 Volume Gas Ossigeno A per applicazioni di spurgo B B B B 8 8 8 Tenere
61. ve codes are user selectable When the instrument is in FCM the CAL message alternates on the display with the currently selected range An example of the display is shown in Figure B 3 Figure B 3 Field Calibration Display OXYGAS 500 USER HANDBOOK In CAL mode the instrument buttons have the functions shown in Figure B 4 CAL Press and Mode Single Press Double Press Hold Button 1 Toggle Pump Exit CAL Mode Enter SPAN Mode On Off Button 2 Next Range Zero Current Save CAL Data Range Figure B 4 CAL Mode Button Functions Zeroing the Instrument 1 Enter FCM See the previous section ENTERING FCM 2 Double press Button Two to zero current gas range 3 Single press Button Two to select the next gas range 4 Repeat steps 2 and 3 until all gas ranges have been zeroed 5 Proceedto FIELD CALIBRATION PROCEDURE to calibrate the instrument FIELD CALIBRATION Field Calibration Procedure 1 Zero gas ranges before attempting calibration See previous section ZEROING THE INSTRUMENT for details 2 Make sure that the instrument pump is running and the gas range selected is compatible with the calibration gas Note A single press of Button One toggles the pump Off On 3 Remove the cap from calibration gas cylinder Make sure that the regulator valve is in the fully closed position Off then connect the gas regulator to the gas cylinder push down gently and tighten cl
62. vides both fast and standard charging facilities and can charge an instrument and spare battery pack simultaneously Using the standard charging option a battery pack can be recharged in 12 hours from a fully discharged state Using the fast charge option a battery pack can be 90 recharged in approximately 60 minutes and fully recharged in 120 minutes To ensure optimum life length the rechargeable pack should be fully discharged and charged on a regular basis of at least every three months The Smart Charger has the option of switching to discharge and fast charge cycle to provide this facility Note The 4 button instrument is for illustration purposes only Replacing the Battery Pack The following procedure should be carried out in a safe area 1 Loosen the two instrument base screws 4mm hex using the special tool provided 2 Remove the battery pack 29 OXYGAS 500 USER HANDBOOK 3 Insert new battery pack 4 Fasten base screws 5 Check that instrument switches on and works to specification Recharging the Battery Pack The battery pack should be recharged in the following situations The BAT or BAT FAULT message is displayed The instrument will not switch on The pump will not switch on It is recommended that the battery pack is fully discharged on a regular basis once every three months This can be done by running the instrument continuously or using the battery conditioning facility on the Smart
63. wn pressure which is constant and around or slightly above normal atmospheric pressure e The use of demand type regulators is not recom mended on instruments with Oxygen or Toxic cells since these are affected by pressure pulses In Field Calibration Mode FCM the buttons perform the functions indicated in CAL Mode or SPAN Mode as shown in Figure B 1 B 1 OXYGAS 500 USER HANDBOOK CAL Mode SPAN Mode V PUMP V INCREASE Button 1 VV EXIT VV Y SPAN x ABANDON Y RANGE V DECREASE Button 2 ZERO Y SAVE Y CALIBRATE V RANGE Figure B 1 Button Functions To simplify button operation when calibrating the instrument an overlay card shown in Figure B 2 is available and can be placed over the top face of the instrument to identify calibration button functions Contact GMI for details Figure B 2 Instrument Overlay Card B 2 FIELD CALIBRATION Selectable Ranges in FCM When in FCM the following ranges are manually selectable by pressing Button Two LEL Volume GAS Oxygen Entering FCM 1 Switch the instrument on and allow it to complete its warm up checks 2 Double press Button One to initiate instrument Switch off While OFF is displayed in the LCD and before the instrument actually switches off enter the access code Note Allow at least one second between button presses when entering the button sequence The default factory set entry code is button sequence 1 2 1 2 Alternati
64. y manufacturer temperature conditions usage etc With rechargeable batteries the BAT flag indicates approximately 30 minutes operation left As the battery power continues to fall the LCD flashes a BAT FAULT message Subsequently the LCD displays OFF and the instrument automatically switches off The batteries should be replaced immediately BAT FAULT This indicates that the batteries require replacing 1 This message which also appear after power indicates that a calibration data error has been detected The instrument should be returned for servicing 25 OXYGAS 500 USER HANDBOOK 26 OPERATOR MAINTENANCE Rechargeable Battery Pack Three battery chargers are available from GMI a Standard Charger a Flatbed Charger and a Smart Charger Standard Charger The GMI Standard Charger takes approximately 14 hours to charge a flat battery Note The 4 button instrument is for illustration purposes only 27 OXYGAS 500 USER HANDBOOK Flatbed Charger The GMI Flatbed Charger allows the Oxygas 500 battery pack to be charged in NORMAL mode which takes approximately 14 hours to charge a flat battery The Mode Select Switch can then be set to STAND BY where a trickle charge will maintain the battery in a fully charged state of readiness Note The 4 button instrument is for illustration purposes only Smart Charger 28 OPERATOR MAINTENANCE The GMI Smart Charger pro

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