Quest Products O2/LEL User's Manual
Contents
1. J SafeCheck 200 C SafeCheck 200 O LEL Gas Monitor Operator s Manual Note Due to the new ATEX Directive in Europe all references in this document to Ex or EEx for intrinsic safety approvals should be disregarded effective 7 1 03 within the member countries of the European Union EU At this time this product is not approved in accordance with the new ATEX Directive and is not sold for use in hazardous atmospheres or explosive zones by customers within the EU Outside of the EU all references to intrinsic safety continue without change QUEST TECHNOLOGIES Thank you for choosing Quest Technologies to meet your personal gas moni toring needs The SafeCheck 200 is a non datalogging easy to operate rugged personal gas monitor that will measure and alarm for hazardous levels of oxygen and combustible gases It is our goal to make your decision to buy Quest products the right one and to provide support for any questions or concerns that might arise The purpose of this manual is to provide the user with the necessary information to operate the SafeCheck 200 The entire manual should be read to fully understand the many features this instrument offers This manual is not all inclusive and cannot cover all unique situations In addi tion no warranties are contained in this manual except as described under the warranty policy section Copyright 1997 Revision A P N 054 482 QUEST TECHNOLOGIES2. 2 4 1 Oxygen Alarms and Levels Both oxygen deficient atmospheres and oxygen rich atmospheres present gravely hazardous work conditions e Low The Low alarm level for oxygen is any level less than 19 5 Oxygen deficiency is the leading cause of worker fatality during confined space entry therefore the importance of monitoring the oxygen level cannot be overstated e High The High alarm level for oxygen is any level greater than 23 5 Oxygen rich atmospheres can lower the combustible range of some gases and can cause them to burn violently 2 4 2 Combustible Gas Alarms and Levels Combustible gas levels can be measured as a percent of the LEL or as a percent by volume of CH methane Refer to Section 3 4 3 Setup under Display Options on page 14 to change the way that combustible gas levels are measured e LEL LEL stands for Lower Explosive Limit An atmosphere which contains less than the LEL the value of which varies among the com bustibles is referred to as a lean atmosphere An atmosphere which exceeds the UEL or Upper Explosive Limit the value of which also varies among the combustibles is referred to as a rich atmosphere The range between the LEL and the UEL is the combustible explosive range SafeCheck 200 Operator s Manual 7 General Overview The default alarm level is set to 10 of the LEL When this level is reached or exceeded the unit goes into alarm If the measured level exceeds 98 of the LEL t
3. Then press and hold down the I O key The screen will display a three second countdown and will beep once per second When the screen goes blank and the alarm is on steady you may release the key The unit is now OFF 3 3 User Modes The SafeCheck 200 has two modes BASIC and PASS FAIL SafeCheck 200 Operator s Manual 9 Operation You may change your unit s mode at any time while it is in the RUN mode To do so simply press the up arrow key located above the belt clip The screen provides you with three options Pressing the I O key changes the unit to the next user mode Repeat this process until the unit is set for the desired user mode 3 3 1 Basic Mode In this mode the screen displays which sensors are installed in your unit Under each sensor indicator its current level is displayed in percentage When a gas level reaches or exceeds an alarm level the alarm light will flash the buzzer will sound and the display will revert to displaying the reason for the alarm High or Low The gas that caused the alarm will alternately display the value of the gas and AL By pressing the I O key during this mode you may switch to an additional screen that displays the unit s battery voltage 3 3 2 Pass Fail Mode In this mode the screen displays which gas sensors are installed in your unit The word PASS is displayed if none of the alarm levels have been exceeded When a gas level reaches or exceeds an alarm level the a
4. Alarm lution racy High Low Oxygen O 0 30 0 1 5 lt 1 23 5 19 5 Gas Range Resolution Accuracy Drift Alarm High ES 0 100 1 5 lt 5 10 ee 0 5 0 1 5 lt 5 0 5 4 Sensor accuracy listed by City Technology as a percentage of the reading Long term output drift listed as percentage of signal loss per month For the LEL sensor refers to long term zero drift based on Methane Factory default settings Recommended for normal use Safe Check 200 Operator s Manual 27 Specifications 8 SPECIFICATIONS Size 6 9 x 3 4 x 2 0 17 5 cm x 8 6 cm x 5 1 cm Weight 22 ounces 0 6 kg Power Nickel Cadmium Battery Pack Rechargeable Nickel Metal Hydride Battery Pack Rechargeable Alkaline Battery Pack 2 C Cells User Replaceable Battery Life 10 hours charge with the NiCad or NiMH battery pack 16 hours with alkaline battery pack Sensors Combustible gases methane catalytic diffusion type amp oxygen Sensor Oxygen and combustible Configurations Measurement Continuous one sample second Display Two line alphanumeric backlighted LCD Alarms Pulsating audio tone and flashing visual Alarm High level Low level O2 only Low battery Thresholds Operating Safety chirp Indicator Temperature 10 to 40 C 14 to 104 F operating Range 15 to 60 C 5 to 140 F storage Humidity 0 to 99 relative humidity non continuous non
5. If using less than two sensors in the SafeCheck 200 a dummy sensor 054 899 must be placed in the empty sensor position to maintain the unit to environment sealing capability 4 1 Changing or Installing the QuestSensors Note Turn the unit off before performing this operation Install the sensors in a non hazardous area When you change the sensors remember to calibrate them after a warm up period of several hours which allows them to stabilize Using a screwdriver loosen the quarter turn fastener which secures the unit s sensor cover The oxygen sensor only fits in the position labeled Sensor 1 Line up the pins with the socket and press it in The combustible sensor only fits in the position labeled Sensor 2 Line up the pins with the socket and press it in Once the sensors are in place replace the cover and tighten the 1 4 turn fastener to secure the cover SafeCheck 200 Operator s Manual 20 Battery Information 5 BATTERY INFORMATION 5 1 Replacing or Installing the Batteries Turn the unit off before performing this operation Please dispose of old batteries in an appropriate manner Three different removable battery packs are available for your SafeCheck 200 Sealed packs containing rechargeable NiCad Nickel Cadmium or NiMH Nickel Metal Hydride batteries are available as well as a pack which will hold two disposable C size alkaline batteries These battery packs which are labeled as to which t
6. LEL or CH methane by volume Select DISPLAY OPTIONS from the SETUP menu Use the Y arrow key to select BK_ LIGHT or LEL With BK_LIGHT highlighted pressing the T O key will change between Y YES and N NO The backlight option will illuminate the screen for 10 seconds each time a Bk Light Y key is pressed during the RUN mode and the LEL of CH4 MAIN menu when turning the unit on and off and when the unit goes into alarm The backlight is useful in low light areas but will not be noticed in bright areas SafeCheck 200 Operator s Manual 14 Operation The other option in the DISPLAY OPTIONS menu is LEL This allows you to select the way that the gas reading from the LEL Combustible sensor will be displayed With LEL highlighted pressing I O will change between of LEL or of CH by volume As of LEL it will display as a percentage of the Lower Explosive Limit from 0 to 100 As of CH4 it will display as a percentage of the volume of CH methane that is present in the environment from 0 0 to 5 0 Note 5 0 by volume of CH is also 100 LEL for CHy Press the A arrow key to return to the setup menu e Password This menu item allows you to set or change your unit s password The password is necessary to enter the setup mode and change any of the unit s setup parameters Use the V arrow key to move through the setup menu until PASSWORD is highlighted then press I O Enter the new E
7. Power Supply includes 110V North American line cord 54 726 B Five Unit Charger with 120 220VDC Power Supply includes 220V Continental European line cord 54 727 Charger Upgrade Kit adds additional charger to existing charger Allows up to a total of five requires 120 220VDC Power Supply 54 890 NiCad Nickel Cadmium Battery Pack 54 891 NiMH Nickel Metal Hydride Battery Pack 54 892 Alkaline Battery Pack 54 714 Earphone 54 703 Calibration Adapter Also used for Sample Draw w Hand Aspirator SafeCheck 200 Operator s Manual 29 Accessories 54 963 Storage Case 54 965 Water Resistant Carrying Case 9 3 Calibration Kit 54 974 Two Cylinder Calibration Kit Includes two cylinder calibra tion case regulator specify which regulator and tubing 9 4 Regulators 54 971 0 5 Ipm Regulator with 2 050 I D tubing 54 326 On Demand Regulator for use with a Sample Draw Pump 9 5 103 Liter Steel Cylinder Calibration Gases 54 137 2 5 Methane in Air 54 138 0 3 Hexane in Air 54 139 1 1 Propane in Air 54 140 2 0 Hydrogen in Air 54 141 100 Nitrogen SafeCheck 200 Operator s Manual 30 Multicharger IT 10 MultiCharger II Caution The MultiCharger II may only be used when the SafeCheck 200 contains rechargeable Nickel Cadmium or Nickel Metal Hydride battery packs If an alkaline battery pack is accidentally placed into the charger it will not attempt to charge No damage will be done to the
8. condensing Range 15 to 90 relative humidity continuous non condensing Warranty Sensors 1 year electronics 1 year Cell Life Oxygen sensor 1 year Expectancy Combustible gas sensor unlimited SafeCheck 200 Operator s Manual 28 Accessories 9 ACCESSORIES 9 1 Replacement QuestSensors 54 872 Combustible Gas LEL 54 873 Oxygen O2 54 899 Dummy Sensor required to cover socket when no sensor is present to maintain unit to environment sealing capability 9 2 Accessories 54 486 Protective Leather Case with Shoulder and Chest Strap 54 487 Protective Leather Case for Unit with Automatic Sample Pump 54 720 QTP 2000 Sample Draw Pump includes 10 ft of Hose with a Sample Gas Probe and Butyrate Wand 54 710 Sample Gas Probe for Pump with Butyrate Wand 11 609 Butyrate Wand for Sample Gas Probe 11 608 Stainless Steel Wand for Sample Gas Probe 54 301 Replacement Hydrophobic Filter for Pump Probe Assembly Package of 5 54 948 Hand Aspirator and 10 ft of Hose 54 898 A Single Unit Charger with 120V Transformer 54 898 B Single Unit Charger with 220V Transformer 54 898 C Single Unit Charger with 12VDC Automobile Adapter 54 725 A Dual Unit Charger with 120 220VDC Power Supply includes 110V North American line cord 54 725 B Dual Unit Charger with 120 220VDC Power Supply includes 220V Continental European line cord 54 725 C Dual Unit Charger with 12VDC Automobile Adapter 54 726 A Five Unit Charger with 120 220VDC
9. main menu selection is not made the unit will automatically enter the RUN mode in about 30 seconds 3 4 1 Run Before running you should zero and calibrate your SafeCheck 200 in a non hazardous area an area away from your potentially hazardous work space free from heavy traffic excessive cigarette smoke and industrial fumes before entering the work environment Do not compromise safety by failing to take these steps prior to use Enter the RUN mode by selecting RUN from the main menu Alternatively the SafeCheck 200 will automatically go into the RUN mode in about 30 seconds after zeroing the unit or if a main menu selec tion is not made with in 30 seconds after the unit is turned on During the RUN mode the LCD screen displays which gas sensors you have installed and during the BASIC mode it 02 LEL displays their respective current gas levels in 20 9 0 percentage Refer to the Section 3 3 User Modes on pages 9 amp 10 for information on what is displayed for the two different modes BASIC or PASS FAIL Pressing the I O key once during the RUN mode will turn on the backlight for 10 seconds Pressing it again will display the battery voltage Pressing the A arrow key during the RUN V Zero 1 O User mode allows you to zero the unit or change the A Cancel Mode user mode Press the Y arrow key to zero the unit Press the I O key to change the user mode Press the A arrow key to cancel and make no chan
10. to zero the sensors are more than the unit will allow a message will appear indicating which sensor or sensors followed by a Zero Failure message In this case the instrument must be zeroed under the CAL main menu function Ifa Zero Failure message appears for any sensor the ZERO procedure is aborted and any key pressed will return to the main menu Unless any menu selections are made following com pletion of the ZERO function the unit automatically goes into the RUN mode after 30 seconds Once in the RUN mode the unit can be zeroed by pressing the A arrow key to pull up the RUN ZERO menu and the V arrow to zero the unit Remember however that the same small adjust ment range is also present in RUN ZERO When zeroing the screen will display Zeroing Unit and then Unit Zeroed This indicates that each sensor has been zeroed to the background atmosphere When the oxygen sensor has been zeroed in a clean air environment it has also been effectively calibrated since fresh air contains 20 9 oxygen SafeCheck 200 Operator s Manual 12 Operation 3 4 3 Setup After turning the unit on move through the main menu using the V arrow key until SETUP is highlighted Press I O and the screen will ask you to enter a four digit numeric password For first time users or for users who have forgotten their password a default password was created This four digit default password is 9157 The blinking cursor appears in pla
11. 3 QUEST WARRANTY POLICY csssssssssssssscssssssssssssessssssessssssessssssssecees 34 SafeCheck 200 Operator s Manual ii Operational Flow Diagrams Operational Flow Diagrams Ru PASS FAIL BASIC ZERO LEVEL PASS LEVEL SETUP BATTERY BATTERY CAL y A ALARMS LEL seT a 7 Vv NA Na LATCH ig TOGGLE LATCH SAET gt SAFETY CHIRP gt o TOGGLE Y N 10 V7 ee aizo gt TOGGLE F C 4 DISPLAY OPTIONS va V BACKLIGHT a gt TOGGLE Y N NG uee fivo TOGGLE LEL Z CH4 PASSWORD ahir PXXXX gt v Figure 2 Setup Menu Figure 1 Run and Zero Menus SafeCheck 200 Operator s Manual SafeCheck 200 Operator s Manual Operational Flow Diagrams INDIVIDUAL 1 0 gt CALIBRATION 1 0 V he gt AUTO CAL CAL N ZERO D g ka A RUN Ei l AUTO CAL CALIBRATION caL li7o V wa 10 ERD r AT SENSORS ry SPAN anus gt 0 Figure 3 Calibration Menu SafeCheck 200 Operator s Manual Introduction 1 INTRODUCTION The SafeCheck 200 is a compact personally worn two gas monitor that can simultaneously measure oxygen and combustible gas Sturdy lightweight and easy to operate this unit is ideal for industrial use Warning The SafeCheck 200 is intended to measure gases that are poten tially dangerous to h
12. AA S A ee gt sia QUEST TECHNOLOGIES 510 S Worthington Street e Oconomowoc WI 53066 USA 800 245 0779 Fax 414 567 4047 http quest technologies com Printed in U S A 054 482 Rev A
13. MATION 21 5 1 Replacing or Installing the Batteries 21 5 2 Low Battery Warnings ccsesseseeeesereeeeseseeecseeeeeeeesceeseeseeeeeeaees 22 5 3 Recharging NiCAD amp NiMH Battery Packs nsss 22 5 4 Servicing Alkaline Battery Packs 5 5 Unit Storage With amp Without Batteries ieee eeeeeeeeteeeeeeeeee 24 6 FACTORS AFFECTING RESPONSE cscscssssssssssssscssssssssssssssesesees 25 6 1 Combustible GaS etende era iE onie EEN ER EEEE EREKE RERA a 6 1 Rich Atmospher s sennor ES 6 1 2 Oxygen Dependence 6 153 Pocketing asca er eke ne Bel iain OnG eis 6 1 4 Combustible LEL Relative Sensitivity 0 0 eee 26 6 27 ORY SEI Soie EEEE son ea atlas ct EEN ERER E 26 SafeCheck 200 Operator s Manual i Table of Contents 7 GAS SPECIFIC DATA eesesessessorcseseoccsceroseseoreseseoreseeeoreseeeoreseorosessoroseseoe 27 8 SPECIFICATIONS 28 9 SafeCheck 200 ACCESSORIES 20029 9 1 Replacement Quest Sensors cecceeeeeseeeeseeeeeeseeeeeeeceeeeseseeeeaees 29 OD NO COSSOTICS o hruns iste shou dake cate E R A ieesotaeseselagentaes 9 3 Calibration Kit ae OA Regulators neeaae eera ER A A ASEE 9 5 103 Liter Steel Cylinder Calibration Gases sesssseeseeeeeeeeeeeeeee 30 10 MulltiCharger Messrs ie esistini e eia aeia 31 11 QTP 2000 SAMPLE DRAW PUMP csssssssssssssssssssssssessssssesssesesers 32 QUEST SERVICE POLICY ssssossssosossossesosossnssssoes nssssnsossosssssossovsssssovsssssss 3
14. The worldwide trusted name in industrial hygiene instruments for over 25 years 510 S Worthington St Oconomowoc WI 53066 USA 800 245 0779 Fax 414 567 4047 http quest technologies com Printed in USA Table of Contents OPERATIONAL FLOW DIAGRAMS ssesesesesesesoresorosereeeesrsrororeeoroesesesesesesee 1 T INTRODUCTION 1 0 ccsscsscesscnsccsscsesssssssesesscssesesssssssessessasssseeseneess 4 2 GENERAL OVERVIEW ccsccsscsssssscsssssssosssssssssessssssecsenssscssnssscsersose 5 2 1 Unit Overview ste D2 THE Key erneieren aa EEA E AAEE AEA EERE 23 Backlight sercsrucer oniri a nat R EA aE 2 4 Alarm and Level Definition fe 2 4 1 Oxygen Alarm Levels 0 ccccccecsseeceecesseseeeeseeseeseeeeseeseeeesees 7 2 4 2 Combustible Gas Alarm Levels 0 ccccccccccsceseessesseesseseeees 7 3s OPERATION seacisssecsediducsessenssassdusssrsctectvssessavsstsassswstedsestenctentsussusceacensens 3 1 T rme the Unit ON ss ssseceesascscesedendcosssie scsened ai ie ta iiaa iE issia 3 2 Turning the Unit OFF an Bide USersMOdeS eres cvectiis sven A A EE BS Pass Fails ccccccnindevesvadesveteder vention T a T AERA 3 3 2 Basic Mode 3 4 Main Menu 3 4 1 Run 3 4 2 Zero 3 4 3 Setup 344 Calibratin aeaniee aae aiiis 4 Quest Sensor INFORMATION 20 4 1 Changing or Installing the Sensors s sessesesesesresesesresrsrereesreree 20 5 BATTERY INFOR
15. atmosphere is difficult to reach zero air cylinders are available Press the I O key when you are sure that you are in a clean air environ ment The unit goes through and automatically zeros all the installed sen sors The installed sensor list now appears in the top line of the display The second line gives you the date of the last cali bration for the highlighted sensor Use the V 02 LEL arrow key to scroll through the sensors Press I O to access the highlighted gas calibration menu At this point the unit takes over and runs the calibration On the display the unit asks you to apply the concentration of ad 02 i calibration gas that was specified in Span MANS ziri i Adjust on page 19 The second line displays the message Waiting along with the current concentration Place the calibration cup over the unit s sensors on the SafeCheck 200 Screw the regulator onto the calibration gas cylinder Connect tubing between the regulator on the gas cylinder and the calibra tion cup on the SafeCheck 200 Open the regulator as far as it will turn and gas should begin flowing over the sensors Once the level of gas begins to rise the second line of the display will change to Detected and the number next to it will begin to rise Once the rise in the gas level starts to slow down and reach a stable level the unit displays the message Stabilizing When the unit determines that the gas level has stabil
16. ay through Friday For service or recalibration outside the U S A please contact your local Quest Dealer or fax Quest U S A at 262 567 4047 SafeCheck 200 Operator s Manual 33 Warranty Policy QUEST WARRANTY POLICY Warranty Policy Quest Technologies warrants our instruments to be free from defects in materials and workmanship for one year under normal conditions of use and service For U S A customers we will replace or repair our option defective instruments at no charge excluding batteries abuse misuse alterations physical damage or instruments previously repaired by other than Quest Technologies Microphones sensors and printers may have shorter warranty periods This warranty states our total obligation in place of any other warranties expressed or implied Our warranty does not include any liability or obligation directly resulting from any defective instrument or product or any associated damages injuries or property loss including loss of use or measurement data For warranty outside the U S A a minimum one year warranty applies to the same limitation and exceptions as above with service provided or arranged through the authorized Quest distributor or our Quest European Service Laboratory Foreign purchasers should contact the local Quest distributor for details SafeCheck 200 Operator s Manual 34 i A ma 5 _ 25 a T T N E BA a oee aaa m T M p i vu
17. ce of the first digit Press the Y arrow key to scroll through the numbers from 9 down to 0 Enter Once you have reached the number you want press Password m T O and the blinking cursor will appear in place of Operation For the combustible gas sensor either LEL or CH the HIGH LEVEL alarm activation level can be set LEL Alarm Level 10 When Alarm Latch is highlighted pressing the I O key will change between Y yes or N no This allows you to select whether the alarm will turn off as soon as the hazard goes away N or 02 LEL whether the alarm will latch Y until you Alarm Latch N acknowledge it by pressing the I O key Once your the next digit Repeat this process until the entire 4 digit password appears on the screen Then when you press the I O key you will have successfully accessed the SETUP menu The following items will be found in the SETUP menu Alarms Set Safety Chirp Display Options and Password Press the V arrow key to cycle through them Press the T O key to select the highlighted item Alarm Set Safety Chirp As you are moving through most of the setup sub menus pressing the up arrow key will return you to the previous menu e Alarms Set There are alarm activation levels for each of the sensors While you may alter any of the alarm activation levels we recommend that you use the default values which have been programmed
18. ch an atmosphere is difficult to reach zero air cylinders are available Press the I O key when you are sure that you are in a clean air environ ment The unit goes through and automatically zeros all the installed sen TUBING sors It now instructs you to apply the gas to the unit LJ Apply the calibration gas for sensor 1 in the Apply Gas REGULATOR A unit and press the I O key It is very importantat Enter to Cal this point if an O sensor is installed and the calibration level used is some thing other than 20 9 that you apply the SALIBRATIONS CYP calibration gas before pressing the I O key Not adhering to this procedure Seed P in this case will result in an incorrect calibration for O2 At this point the unit takes over and runs the calibration It asks that you apply gas for the first sensor it finds On the display the unit asks you to apply the concentration of calibration gas that was specified in SPAN ADJUST showing the expected value and displaying the message Waiting From here on it operates just like INDIVIDUAL CAL and steps through each gas in turn asking you to apply each gases cal level OA s until it is done or you abort the process CALIBRATION GAS Figure 6 Calibration SafeCheck 200 Operator s Manual 17 SafeCheck 200 Operator s Manual Operation e Span Adjust This menu allows you to set the concentration of the calibration gas us
19. charger The MultiCharger II is not approved for operation in a hazardous environment so any attempt to charge a unit and or a rechargeable battery pack in a hazardous environment is specifically cautioned against In fact if the unit is operated while connected to the charger in a hazardous location all intrinsic safety approvals are voided We provide this charger for the reconditioning of the NiCad and NiMH battery packs The battery packs may be charged either as part of the unit or may be removed from the unit for separate recharging The MultiCharger II is designed to fully recharge a battery pack in less than two hours When the pack is fully charged the charger switches to a trickle charge to maintain the charge on the pack and to avoid damage to the pack by overcharging In addition there is a discharge button that can be used with the NiCad battery pack to fully discharge the pack before charging to counteract the affect of battery memory that is a problem inherent to NiCad batteries As a guide using this feature would discharge a fully charged NiCad pack in about six hours With NiCad packs it is recommended that you do a discharge before charge cycle about every 10th charge cycle This helps to lengthen the life of a NiCad pack especially if the pack is only partially discharged on a regular basis There is no requirement to do the conditioning discharge charge cycle on the NiMH battery pack as this type of battery does not suffe
20. e During this startup routine the back light will illuminate the LED alarm light will turn on and the audible alarm will sound Your unit will determine which sensors are installed what their current alarm levels are and the current battery pack voltage After the initialization screens the main menu automatically appears The Run Setup first highlighted item is ZERO At this time Zero Cal you can zero the umt s sensors by simply Ez pressing the I O key We recommend that you zero the unit at this time provided that you are in a non hazardous clean air environment To reduce the chances of the unit being zeroed in a contaminated environment only small automatic adjustments are allowed in this main menu ZERO func tion If the adjustments necessary to zero the sensors are more than the unit will allow a message will appear indicating which sensor or sensors cannot be zeroed followed by a Zero Failure message In this case the instrument must be zeroed under the Cal main menu function If no main menu selections are made the unit automatically will go into the RUN mode after 30 seconds If you turn the unit ON and there are no sensors in place the unit will not go into any of the modes that depend on sensors being there e g RUN ZERO or CAL 3 2 Turning the Unit OFF To turn the unit OFF the unit must be in the main menu If in the run mode exit to the main menu by closing the session Refer to Section 3 4 1 Run on page 11
21. ed to calibrate each of the sensors The unit then uses 02 LEL the concentrations entered here during either of the 20 9 calibration options When Span Adjust is selected from the main CAL menu the installed sensor list appears in the top line of the display The first sensor installed is highlighted and it s calibration concentration appears Using the Y arrow key to move across the top line will step through and show the calibration concentration for all installed sensors To change a calibration concentration use the W arrow key to select a O02 Span 20 9 sensor and press the I O key Use the arrow Use to change keys to change the calibration concentration and the I O key to accept it SafeCheck 200 Operator s Manual 19 QuestSensor Information 4 QuestSensor INFORMATION The SafeCheck 200 has the capacity for an oxygen sensor and a com bustible sensor Each one of these sensors is an intelligent sensor and contains information pertinent to it s operation Information relating to alarm setpoints are stored in the sensor You may install less than two sensors and your unit will still perform all of the necessary functions for the gases you need to monitor The unit can simultaneously handle the following QuestSensor combinations 1 Up to two a combustible sensor and an oxygen sensor The oxygen sensor and the combustible sensor each have their own partic ular sockets into which only they will fit Note
22. er IT is not approved for operation in a haz ardous environment so any attempt to charge a unit and or a rechargeable battery in a hazardous environment is specifically cautioned against In fact if the unit is operated while connected to the charger in a hazardous location all intrinsic safety approvals are voided The MultiCharger II is designed to fully recharge a battery pack in less than two hours When the pack is fully charged the charger switches to a trickle charge to maintain the charge on the pack and to avoid damage to the pack by overcharging In addition there is a discharge button that can be used with the NiCad battery pack to fully discharge the pack before charging to counteract the affect of battery memory that is a problem inherent to NiCad batteries As a guide using this feature would discharge a fully charged NiCad pack in about six hours With NiCad packs it is recommended that you do a discharge before charge cycle about every 10th charge cycle This helps to lengthen the life of a NiCad pack especially if the pack is only partially discharged on a regular basis There is no requirement to do the conditioning discharge charge cycle on the NiMH battery pack as this type of battery does not suffer from memory effects Note Rechargeable SafeCheck 200 battery packs may only be charged with the Quest MultiCharger II battery charger Use of other charger s could result in damage to either the unit or the battery pack Lik
23. ewise attempting to charge other battery packs with a Quest MultiCharger II could result in damage to the charger Servicing Alkaline Battery Packs The alkaline pack is designed to hold two C Size alkaline batteries The cover on the pack is held in by three captive Phillips head screws The pack is opened by undoing the screws and gently removing the cover Make sure to observe the polarity markings in the battery pack to insure that the batteries are inserted correctly Caution Only fully assembled alkaline packs may be removed or replaced in a hazardous environment Alkaline packs may not be opened for battery replacement in a hazardous environment In addition any attempt to use rechargeable batteries in the alkaline battery pack will void any intrinsic safety approvals and substantially reduce unit run time SafeCheck 200 Operator s Manual 23 SafeCheck 200 Operator s Manual Battery Information 5 5 Unit Storage With and Without Batteries For short term storage it is recommended that you leave the batteries in your unit In a turned off unit a fully charged rechargeable battery pack will last approximately 80 days while an alkaline pack will last approximately 140 days For long term storage keep a battery pack on the unit Periodically replace the batteries if using the alkaline pack or recharge them if using rechargeable packs Note It is recommended to keep a battery pack attached whenever possible to maximi
24. ges This zero function works the same as the one in the main menu and only allows small automatic adjustments to be made in case the zero is being attempted in a contaminated environment SafeCheck 200 Operator s Manual 11 Operation Exit the RUN mode by holding down the I O key for three seconds The unit displays a message Session Stop In x Seconds with a countdown After these three seconds the unit will display a message Session Closing You can release the I O key and when the session finishes clos ing the unit will be in the Main Menu 3 4 2 Zero Perform this operation in a non hazardous area prior to every use to adjust for the sensors sensitivity changes which occur over time and after use Fresh uncontaminated air is necessary for the proper outcome of this pro cedure Zero the unit away from heavy traffic excessive cigarette smoke and industrial fumes If such an atmosphere is difficult to reach zero air cylinders are available Once you have turned on the unit ZERO is automatically highlighted when the screen displays the main menu At this time you can zero the unit s sensors by simply pressing the I O key We recommend that you zero the unit at this time PROVIDED THAT YOU ARE IN A NON HAZ ARDOUS CLEAN AIR ENVIRONMENT To reduce the chances of the unit being zeroed in a contaminated environment only small automatic adjustments are allowed in this main menu ZERO function If the adjust ments necessary
25. he alarm automatically latches on and the unit will remain in alarm until the unit is taken out of the RUN mode When this occurs a high probability exists that the gas concentration is above the LEL in the combustible range and overloading the LEL sensor e CH4 This is a mode where the unit is set up to measure a specific com bustible gas methane CH4 in a percent by volume concentration rather than a percent LEL concentration This is just a different way of reporting the concentration of one specific gas CH4 When CH is at 5 0 by vol ume it is also at 100 of it s LEL point The default alarm level is set to 0 5 by volume CH4 When this level is reached or exceeded the unit goes into alarm If the measured level exceeds 4 9 of CHy the alarm automatically latches on and the unit will remain in alarm until the unit is taken out of the RUN mode When this occurs a high probability exists that the gas concentration is above 5 0 by volume in the combustible range and overloading the combustible gas sensor ALTHOUGH A RICH ATMOSPHERE MAY NOT PRESENT IMMINENT DANGER OF IGNITING AT THE TIME OF CURRENT MEASUREMENT ANY DILUTION OF THIS RICH ATMOSPHERE COULD BRING THE CONCENTRATION DOWN INTO THE COMBUSTIBLE RANGE SafeCheck 200 Operator s Manual 8 Operation 3 OPERATION 3 1 Turning the Unit ON Press the I O key once to turn on the unit The unit will then go through an internal self test and startup routin
26. into the unit These values are listed under Section 7 GAS SPECIFIC DATA on page 27 02 LEL Within the Setup menu access ALARMS SET Alarm Latch N by pressing the I O key when ALARMS SET is highlighted To change the alarm activation levels first highlight a sensor using the V arrow key and then select it by pressing the I O key For the OXYGEN sensor both HI and LOW 02 HI Alrm 23 5 alarm activation levels can be set LO Alrm 19 5 SafeCheck 200 Operator s Manual 13 selection is made press the A arrow key to return to the SETUP menu or the V arrow key to change any of the sensor s alarm activation levels e Safety Chirp The SAFETY CHIRP feature when enabled provides an audio beep every 10 seconds in the RUN mode to inform the user that their unit is turned on and is currently running Use the V arrow key to move through the setup menu until you reach SAFETY CHIRP Press the I O key to access the 7 safety chirp menu In this menu you have the eae Chirp X options of enabling or disabling the safety chirp To select whether or not the safety chirp feature is turned on press the I O key while SAFETY CHIRP is highlighted The letter on the right will change between Y YES and N NO e Display Options This menu allows you to select whether or not you wish to use the back light option It also allows you to select whether to display the combustible sensor if present as
27. ized and no longer rising the unit will do a calibration It will display a mes sage Calibrating and if successful Calibrated If calibration is not suc cessful the unit will indicate Cal Failure Check your calibration setup and calibration gas and then attempt another calibration If the unit still cannot calibrate either replace the sensor or have the unit serviced SafeCheck 200 Operator s Manual 16 Operation Operation During the calibration procedure it also shows you the level of gas that the e All Cal sensor is detecting At anytime during the calibration procedure calibra This operates the same as INDIVIDUAL CAL except that it steps auto tion can be terminated by depressing any key At the conclusion of a suc matically through all of the installed sensors to Calibration Zero cessful calibration for a gas depress the I O key or the A arrow key to calibrate all of them The unit first waits to do a Ready m return to the sensor list screen CALIBRATION ZERO This is automatically Repeat the procedure as necessary for any other gases being measured done before any calibration to adjust for drift in each sensors sensitivity To return to the main CAL menu press the A arrow key which occurs over time and after use NOTE Fresh uncontaminated air is necessary for the proper outcome of this procedure Zero the unit away from heavy traffic excessive cigarette smoke and industrial fumes If su
28. larm light will flash the buzzer will sound and the display will revert to dis playing the reason for the alarm High or Low It also shows a numerical display of the gases in percentage and the gas that caused the alarm will alternately display the value of the gas and AL By pressing the I O key during this mode you may switch to an additional screen that displays the unit s battery voltage 3 4 Main Menu When you turn on the unit the main menu appears on the screen after the SafeCheck 200 completes its power up sequence You may return to this menu anytime when in RUN by holding down the I O key for three seconds The unit displays a message Session Stop In x Seconds with a countdown After these three seconds the unit will display a message Session Closing You can release the I O key and when the session finishes closing the unit will be in the Main Menu The item which appears with a blinking cursor on the first character will be referred to as the highlighted item it is underlined in this manual SafeCheck 200 Operator s Manual 10 Operation To move through the main menu use the down arrow key located behind the belt clip When the menu choice you want Run Setup is highlighted press the I O key to select that Zero Cal choice ZERO is always the first highlighted menu item IF YOU ARE IN A CLEAN AIR ENVIRONMENT you may zero the unit at this time by pressing the I O key After zeroing or if a
29. n place The pack is keyed so it only goes in one way 5 2 Low Battery Warnings When the battery voltage is reduced to approximately 2 2 volts the alarm will sound and the display will indicate LOW BATTERY ALARM At this point the battery alarm can be silenced up to two times for a period of one minute each before the alarm will turn on and stay on until the unit is shut off When low battery is indicated you need to shut the unit off and replace or recharge the battery pack If operation of the unit is continued until the battery voltage gets down to 2 1 volts the alarm will sound and the display will indicate DEAD BATTERY SHUTDOWN At this point the alarm cannot be silenced and it will stop monitoring the environment When this occurs you need to turn the unit off and replace or recharge the battery pack If this is not done after approximately thirty seconds the unit will turn itself off This extra protection feature is included to provide an orderly shutdown of the program that controls the unit and ensure that essential values are saved in the unit s memory 5 3 Recharging NiCad and NiMH Battery Packs We provide a charging station for the reconditioning of these battery packs The battery packs may be charged with the Quest MultiCharger II either as part of the unit or may be removed from the unit for separate recharging SafeCheck 200 Operator s Manual 22 Battery Information 5 4 Caution The MultiCharg
30. nter New password using the V arrow key to change the Password m digits and the I O key to set them After the last digit is entered you will be asked to re enter the same password as a check If they match the display will show PASSWORD ACCEPTED and then return to the setup menu If the re entered password does not match the initial one you will be asked to begin again Pressing the A arrow key at any time will return to the main setup menu 3 4 4 Calibration This should be done for each installed sensor prior to entering your work area An uncalibrated unit can be as dangerous as no unit at all Failure to calibrate can result in inaccurate sensor readings From the main menu press the I O key while CAL is highlighted The following items will be found in the CAL Individual Cal menu INDIVIDUAL CAL ALL CAL and All Cal SPAN ADJUST Press the Y arrow key to cycle through them Press the I O key to select the highlighted item SafeCheck 200 Operator s Manual 15 Operation e Individual Cal The unit first waits to do a CALIBRATION ZERO This is automatically done before any calibration to Calibration Zero adjust for drift in the sensor s sensitivity which Ready m occurs over time and after use Note Fresh uncontaminated air is necessary for the proper outcome of this procedure Zero the unit away from heavy traffic excessive cigarette smoke and industrial fumes If such an
31. perform all of the necessary operations This key is found on top of your unit above the display screen You will use it to Tio turn the unit on to turn the unit off and to select your desired menu choices when they are highlighted V A These keys are located above the belt clip You will need to use the arrow keys to change the unit s modes and during the ZERO SETUP and CAL operations You generally use the A arrow to return to the previous screen and to adjust numeric values You generally use the Y arrow to scroll through and highlight menu items and to select and adjust numeric values LOOSEN SCREWS AND SLIDE BELT CLIP DOWN TO ACCESS ARROW KEYS es ac TE be cas Am P n 054 090 2 contan lay mean INSTRUCTIONS CE IE Figure 5 Accessing the Arrow Keys SafeCheck 200 Operator s Manual General Overview 2 3 Backlight The unit features a backlight which illuminates the screen for 10 seconds each time a key is pressed Refer to Section 3 4 3 Setup under Display Options on page 14 to enable disable the backlight illumination feature The backlight also illuminates for 10 seconds any time the unit goes into alarm 2 4 Alarm and Level Definition All of the following levels and alarm levels are based on the measurement of one sample per second Refer to Section 3 6 3 Setup under Alarms Set on page 13 to change any of the alarm activation levels
32. r from memory effects Note Rechargeable SafeCheck 200 battery packs may only be charged with the Quest MultiCharger II battery charger Use of other charger s could result in damage to either the unit or the battery pack Likewise attempting to charge other battery packs with a Quest MultiCharger II could result in damage to the charger SafeCheck 200 Operator s Manual 31 OTP 2000 Sample Draw Pump 11 QTP 2000 SAMPLE DRAW PUMP The QTP 2000 Sample Draw Pump may be used to test air prior to entering a confined space Attach the pump to the SafeCheck 200 using the attach ment screw located on the end of the pump The pump starts automatically any time that the unit is in the RUN MODE or the CALIBRATE MODE The pump will not run in any other mode to conserve unit battery power Attach the Tygon tubing and sample gas probe as shown SAMPLE GAS PROBE QTP 2000 SAMPLE DRAW PUMP Figure 8 Sample Draw Pump The Sample Gas Probe contains a replaceable hydrophobic filter to prevent accidentally drawing water into the unit and to prevent dust and solid objects from getting into the unit The pump gets it s power from the unit and draws approximately 2 5 liters per minute It is also controlled by the unit in that if it becomes plugged or begins to draw in water the unit will cause the pump to shut down and give an audible and visual indication that the pump is plugged SafeCheck 200 Operator s Manual 32 Ser
33. uman health To help ensure worker safety through the proper use of your unit it is important that you not only read but also understand the contents of this manual Please familiarize yourself with the unit before using it in a potentially hazardous situation Caution Underwriters Laboratories Inc has assessed only the combustible gas portion of this instrument for performance Note When used with alkaline batteries in Canada tested per CSA Canadian Standards Association Standard C22 No 152 Combustible Gas Detection Instruments are to be used in Canada only with the following C size alkaline batteries Eveready E93 Duracell MN1400 Rayovac 814 Radio Shack 23 551 Note When used with alkaline batteries in Europe can only be used with Rayovac No 8 14LR14 Varta No 4041 LR14 C Duracell MN1400LR14 SafeCheck 200 Operator s Manual 2 1 Unit Overview O2 LEL 207 10 SateCheck 200 UMM General Overview ALARM LED ALARM BUZZER PUMP ATTACHMENT SENSOR LEL CONNECTOR COVER YI CONNECTIONS Figure 4 Unit Overview SafeCheck 200 Operator s Manual General Overview 2 2 The Keys In order to make the operation of the SafeCheck 200 as simple as possible you only need to use three keys to
34. vice Policy QUEST SERVICE POLICY Service Policy The Quest product you have purchased is one of the finest gas detection instruments available It is backed by our full one year warranty which seeks complete customer satisfaction This is your assurance that you can expect prompt courteous service for your equipment from the entire Quest service organization Should your Quest equipment need to be returned for repair or recalibration please contact the Service Department at 800 245 0779 USA or Fax 262 567 4047 for a Return Authorization Number The RA number is valid for 30 days and must be shown on the shipping label and purchase order cover letter If you are unable to return instruments in that time call for a new RA number Send it prepaid and properly packed in the original shipping carton directly to Quest Technologies 510 S Worthington St Oconomowoc WI 53066 U S A Repair or replacement work done under warranty will be performed free of charge and the instrument will be returned to you prepaid Your copy or a photocopy of the Quest Registration Card will serve as proof of warranty should the factory require this information If for any reason you should find it necessary to contact the factory regard ing service or shipping damage please direct your calls or letters to the attention of the Service Manager Quest Technologies 262 567 9157 or 800 245 0779 Office hours are from 7 AM to 6 PM Central Standard Time Mond
35. xt reduces the temperature of the sensor filament and a lower Methanol Carbon Monoxide 30 reading is usually the result Ethanol 59 6 1 2 Oxygen Dependence Isopropyl Alcohol 39 The presence of oxygen in the sampled atmosphere is necessary for the proper measurement of the combustibles If sufficient oxygen is not present the measurement of combustible gases could be thrown off so drastically 6 2 Oxygen that hazardous levels could be present and they would not be detected 6 1 3 Pocketing Lean mixtures may collect or be trapped in an area of the confined space such as corners support beams or equipment and become flammable therefore it is critical to test all areas and levels of a confined space for the presence of combustible gases SafeCheck 200 Operator s Manual 25 The oxygen sensor can underestimate the amount of oxygen present if water vapor in the area has a higher temperature than the ambient temperature To adjust for this situation use the QTP 2000 Sample Draw Pump to cool the air being drawn to the sensor allowing the water vapor to condense and permitting sampling at a relatively constant temperature and humidity SafeCheck 200 Operator s Manual 26 Gas Specific Data 7 GAS SPECIFIC DATA Note Underwriters Laboratories Inc has assessed only the combustible gas portion of this instrument for performance Gas Range Reso Accu Drift Alarm
36. ype they are are interchangeable and the packs can be removed from the unit and replaced while in a hazardous environment PRESS RED BATTERY RELEASES TO REMOVE BATTERY PACK Figure 7 Battery Replacement Caution Only fully assembled alkaline packs may be removed or replaced in a hazardous environment Alkaline packs may not be opened for battery replacement in a hazardous environment In addition any attempt to use rechargeable batteries in the alkaline battery pack will void any intrinsic safety approvals and substantially reduce unit SafeCheck 200 Operator s Manual 21 Battery Information Caution Any time the battery pack is removed and then replaced your unit is designed to turn itself on This is to insure that in the case of an accidental power interruption the unit comes back on to safeguard worker protection Therefore any time that the battery pack is removed and then replaced it is necessary to manually turn off the unit unless you are going to immediately use the instrument The unit should be turned off before changing a battery pack The pack is held in firmly by two spring clips located on either side of the battery To remove the pack depress the two spring clips and pull the pack away from the main housing To replace the battery pack position the pack such that contacts on the pack are in line with the pins in the housing and gently push the main housing and pack together until both spring clips lock i
37. ze the life of the internal lithium backup battery The backup battery is not user replaceable 24 Factors Affecting Response 6 FACTORS AFFECTING RESPONSE Factors Affecting Response 6 1 4 Combustible LEL Relative Sensitivity The following table shows the sensitivity of the LEL sensor to a number of 6 1 Combustible Gas other combustible gases The values listed are relative to a calibration for The performance of the combustible gas sensor requires sufficient oxygen 100 LEL for Methane levels at least 10 to function properly When monitoring combustible gases always simultaneously monitor for oxygen particularly in any Combustible Gas Relative Combustible Gas Relative application where a lean oxygen atmosphere could be present as in a LEL Sensitivity LEL Sensitivity confined space Acetone 45 6 1 1 Rich Atmospheres Methyl Ethik etone 8 In a rich atmosphere the combustible gas concentration is greater than the Toluene 40 Upper Explosive Limit Several dangers exist in an atmosphere rich in n Pentane 45 Ethyl Acetate 39 combustible gas The introduction of fresh air or simply the introduction of o exane B 81 some method of air circulation could dilute the concentration enough to vane bring it down into the combustible range In addition as the volume of Ammonia 126 combustible gas rises its natural cooling effect which varies from one gas n Octane Cyclohexane 40 to the ne
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