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THEORY OF OPERATION

6 - 1

6. THEORY OF OPERATION

The  Q-RAE monitor uses  one  to  four  different sensors to
measure a variety of gases.  Up to two electrochemical,
toxic-gas sensors can be installed in the monitor to measure
inorganic toxic gases.  A catalytic bead sensor is used to
measure combustible gases. An electrochemical sensor is
used to measure oxygen concentration.

Figure 6-1 Block Diagram of Q-RAE Monitor

A diaphragm pump draws the air sample into the sensor
manifold and then distributes it to all sensors.

A single chip microcomputer is used to control the
operation of the alarm buzzer, LED, pump and light sensor.

Micro-
processor

LCD Display

Keypad

Serial
Port

Battery

TOX1

TOX2

LEL

OXY

Pump

Light
sensor

LED

Buzzer

Charger

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Summary of Contents for Q-RAE

Page 1: ...Q RAE MULTI GAS MONITOR OPERATION AND MAINTENANCE MANUAL Document No 027 4001 Rev B RAE SYSTEMS INC 1339 Moffett Park Drive Sunnyvale CA 94089 November 2001 ...

Page 2: ...Monitor CDRAE Corona Discharge VOC Monitor ToxiRAE PLUS PID Monitor ToxiRAE PLUS Single Gas Monitors ToxiRAE PLUS Oxygen Monitor ToxiRAE PLUS Combustible Gas Monitor MiniRAE PLUS Classic PID ModuRAE Fixed System PID AreaRAE Wireless Multi point Multi gas Systems How can I be informed and updated Be sure to mail in your warranty card via email post or fax to get on RAE s private database informatio...

Page 3: ...ES 3 1 3 1 Battery Charging Operation 3 2 3 2 Alkaline Battery Adapter 3 4 3 3 Water Trap Filter 3 5 3 4 Remote Sampling Probe or Tygon Tubing 3 6 3 5 Dilution Fitting 3 7 3 6 Calibration Adapter 3 8 4 PROGRAMMING OF Q RAE 4 1 4 1 Programming Mode 4 2 4 2 Keys for Programming Mode 4 4 4 3 Entering into Programming Menu 4 5 4 4 Calibration of Q RAE Monitor 4 7 4 4 1 Fresh Air Calibration 4 9 4 4 2 ...

Page 4: ...eraging Method 4 35 4 8 Change Sensor Configuration 4 36 4 8 1 Change LEL Gas Selection 4 38 4 8 2 Enable Disable Sensor 4 40 4 9 Exit Programming Mode 4 42 5 COMPUTER INTERFACE FOR Q RAE 5 1 5 1 Install ProRAE Suite Software 5 2 5 2 Connect Q RAE to PC 5 4 5 3 Start ProRAE Suite Software 5 5 5 4 Setup Communication Port 5 7 5 5 Processing the Configuration Data 5 8 5 5 1 Editing the Configuration...

Page 5: ...ANCE 7 1 7 1 Battery Replacement 7 2 7 2 Sensor Replacement 7 4 7 3 Sampling Pump Replacement 7 7 8 TROUBLESHOOTING 8 1 8 1 Special Diagnostic Mode 8 2 8 2 Troubleshooting Table 8 8 APPENDIX A QUICK REFERENCE GUIDE A 1 APPENDIX B CORRECTION FACTORS B 1 APPENDIX C Q RAE DATA CONVERSION TO MICROSOFT EXCEL C 1 APPENDIX D RAE TECHNICAL NOTES D 1 APPENDIX E RAE APPLICATION NOTES E 1 APPENDIX F LITERATU...

Page 6: ...nce with the manufacturer s instructions CAUTION To reduce the risk of electric shock turn off power before removing the monitor cover Disconnect the battery before removing sensor module for service Never operate the monitor while the cover is removed Remove monitor cover and sensor module only in an area known to be non hazardous The model PGM 50Q equipment is classified as to intrinsic safety f...

Page 7: ...tor After running for several minutes the residual vapors in the detector chamber will be cleared and the reading should return to zero 2 The battery of the Q RAE monitor will discharge slowly even if it is turned off If the monitor has not been charged for 5 7 days the battery voltage will be low Therefore it is a good practice to always charge the monitor before using it It is also recommended t...

Page 8: ...0028 500 0029 500 0037 ou 500 0039 Cet instrument n a pas été essayé dans une atmosphère de gaz air explosive ayant une concentration d oxygène plus élevée que 21 La substitution de composants peut compromettre la sécurité intrinsique Ne charger les batteries que dans l emplacements désignés non dangereux STATIC HAZARD Clean only with a damp cloth DANGER RISQUE D ORIGINE ELECTROSTATIQUE Nettoyer u...

Page 9: ... 50 of full scale concentration Accuracy must be within 0 20 of actual Accuracy may be corrected by calibration procedure ATTENTION Avant chaque utilisation journaliere verifier la sensibilité avec une concentration connue de methane equivalente a 20 50 de la pleine échelle La précision doit être comprise entre 0 20 de la valeur vraie et peut être corrigée par une procédure diétalonnage CAUTION An...

Page 10: ...e first time For maximum safety the accuracy of the Q RAE should be checked by exposing the sensor s to known concentration calibration gas before each day s use AVERTISSEMENT La calibration de toute instruments de RAE Systems doivent être testé en exposant l instrument a une concentration de gaz connue par une procédure diétalonnage avant de mettre en service l instrument pour la première fois Po...

Page 11: ...th catalytic bead sensors 2 Oxygen hydrogen sulfide and carbon monoxide are monitored with electrochemical sensors Other features include Lightweight and Compact 16 oz 454 g hand held size Dependable and Accurate 10 hours monitoring with micro controller User Friendly Menu driven intuitive end use operation Programmable Alarm Thresholds Audio buzzer flashing display alarm Q RAE consists of A multi...

Page 12: ... electrochemical sensors for toxic gases and oxygen catalytic sensors for combustible gases Battery Rechargeable 4 8V 1100 mAh Li ion or 4 8V 1700 mAh Ni Cd battery pack with built in charger 8 hour charge time or a 4 AA alkaline battery adapter Operating Time Up to 10 hours continuous operation Display 2 line 16 digit LCD with LED back light automatically in dim light Keypad 1 operation and 2 pro...

Page 13: ... High alarm Calibration Two point field calibration for fresh air and standard reference gas Sampling Pump Internal integrated with 250 cc min flow rate high setting Protection Password protected calibration settings alarm limits and data Intrinsic Safety UL cUL Class 1 Division I Group A B C D US Canada EEx ia IIC T4 Europe Class T3c with Li ion 500 0037 battery pack EM Immunity No effect when ex...

Page 14: ... Low and High alarm Datalog Interval Programmable 1 3600 sec External Alarm Optional plug in pen size vibration alarm or earphone Communication Upload data to PC and Download monitor setup from PC through RS 232 link to serial port on PC Temperature 20o to 45oC 4o to 113o F Humidity 0 to 95 relative humidity non condensing ...

Page 15: ...als whenever the exposure exceeds preset limits or oxygen is depleted Prior to factory shipment the Q RAE is preset with default alarm limits and the sensors are pre calibrated with standard calibration gas However the user should calibrate the instrument before the first use After the monitor is fully charged and calibrated it is ready for immediate operation ...

Page 16: ...r parts of the Q RAE Multi gas Monitor 3 keys for the user to interact with the monitor 1 operation key and 2 programming keys for normal operation or programming of the monitor LCD display with backlight to show real time and calculated measurements Gas entry port Buzzer Charge contact Serial port Wrist strap Key LCD display LED alarm ...

Page 17: ... 3 Buzzer and red LED for alarm signal whenever the exposures exceed preset limits Wrist strap Charge contact for plugging directly to the charging station Gas entry port Serial communication port for PC interface ...

Page 18: ...e front panel of the monitor The functions of the 3 keys during normal operation are summarized in Table 2 1 on the next page Figure 2 2 Key pad and display of the Q RAE Multi gas Monitor Light sensor 0 1 0 0 0 0 20 9 MODE ON Y N OXY H2S LEL CO LED alarm charge status Mode Key Y Key N Key ...

Page 19: ...k light Answer as No Y Alarm test and alarm acknowledgment turn off latched alarm turn on pump or LEL sensor Answer as Yes Pressing and holding MODE for 5 seconds turns off the power to the monitor Monitor will beep once per second during power down sequence Press MODE momentarily to choose different display modes see Section 2 4 for details ...

Page 20: ...ombustible gases 15 minute Short Term Exposure Level STEL values of H2S and CO in ppm and 8 hour Time Weighted Average TWA Battery voltage and shut off voltage in volts Real time clock run time and temperature Datalogging mode or Start Stop Datalog menu to enable disable datalogging if manual datalogging mode is selected LEL gas names if the LEL sensor is installed Print Reading menu to print the ...

Page 21: ...the alarm limits have been reset to default values for the new sensor If a sensor reaches its expected end of life a Warranty Expired message will be displayed Next the monitor displays the preset alarm limits for each sensor battery voltage shut off voltage user mode alarm mode datalog mode available data storage memory in hours datalog mode and datalog interval in seconds After several more seco...

Page 22: ...e current real time data including TWA STEL Peak and elapsed time are erased However the datalog data is preserved in non volatile memory Even if the battery is disconnected the datalog data will not be lost During the power off period the real time clock will continue to operate until the battery is completely drained usually in 5 7 days without any charging If the battery is completely drained o...

Page 23: ...owing the version number indicates that the monitor is configured as a Datalogging monitor Without the letter D it is a Non datalogging monitor Users can upgrade a Non datalogging monitor to a Datalogging monitor Call the factory for information on how to order the upgrade kit and follow the instructions described in Section 5 7 to enable or disable the datalogging feature for the monitor ...

Page 24: ...splay mode the Q RAE Multi gas Monitor is able to display all the information in the text mode In addition the following information is also available by pressing the MODE key peak minimum STEL TWA run time in hours and minutes temperature in C datalog mode or enable disable datalogging operation in manual datalog mode LEL gas names printing and communication with a PC options The user cannot get ...

Page 25: ...on in parts per million ppm for toxic gases of volume for oxygen and of LEL for combustible gases The reading is updated once per second and is shown in the LCD display 0 0 0 20 9 2 The sensor names are displayed as LEL for the combustible gas sensor O2 for the oxygen sensor H2S for the hydrogen sulfide sensor CO for the carbon monoxide sensor CO H2S LEL OXY ...

Page 26: ...is the lowest reading of each gas concentration since the monitor was turned on The reading is updated at one second intervals and is shown in the LCD display with a Min message 0 0 0 Min 19 9 5 The STEL reading is the last 15 minute average reading of the gas concentration The reading is updated once per minute and is shown in the LCD display with STEL message For the first 15 minutes will be dis...

Page 27: ...an never decrease unless cleared 0 0 TWA 7 The battery voltage reading is the current battery voltage in volts The reading is updated once per second and is shown in the LCD display The shut down voltage is also shown Note A fully charged battery pack should show 4 8 volts or higher When the battery voltage falls below 4 4 volts a flashing Bat will appear as a warning message This means there are ...

Page 28: ...sage is displayed turns on the datalogging Likewise pressing the Y key while Stop Datalog message is displayed turns off the datalogging 10 The monitor will display the selected LEL gas name if the combustible sensor is installed When the selected LEL gas is different than the calibration gas a programmed correction factor for that specific gas is multiplied by the readings and the corrected gas c...

Page 29: ...e gas concentration Press Y to proceed and the monitor enters the communication standby mode The LCD then displays Ready Connect the monitor to the serial port of a PC The monitor is then ready to receive any command from PC see Section 5 for details on communications between Q RAE and PC Note When the monitor is in communication standby mode it stops monitoring the gas concentration and stops dat...

Page 30: ...Wrong password back to instantaneous display Correct password Enter Programming menu N Toggle back light Y Test alarm stop alarm MODE Display Battery voltage MODE Print Reading if printer option is enabled MODE Communicate with PC Y Monitor will pause OK Y Ready N Return to Instantaneous display Sensor names alternately MODE or N Return to Instantaneous Display Sensor Names alternately ...

Page 31: ...rogramming menu N Toggle back light Y Test alarm stop alarm MODE Display Peak values MODE Display Min values MODE Display STEL values MODE Display TWA values MODE Display Battery voltage MODE Print Reading if printer option is enabled MODE Communicate with PC Y Monitor will pause OK Y Ready N Return to Instantaneous display MODE or N Return to Instantaneous display Sensor names alternately ...

Page 32: ...ry voltage falls below a pre set voltage level 4 4 V LEL sensor off pump stall or when the datalog memory is full When the low battery alarm occurs there will be approximately 20 30 minutes of operating time remaining When the battery voltage falls below 4 2 V the monitor will be turned off automatically Alarm Signal Disabled It is extremely important to note that during the following conditions t...

Page 33: ...l Summary The various alarm signals are summarized here Condition Alarm Signal Gas exceeds High Alarm limit 3 beeps flashes per second plus sensor name on LCD Gas exceeds Low Alarm limit 2 beeps flashes per second plus sensor name on LCD Gas exceeds STEL 1 beep flash per second plus sensor name on LCD Gas exceeds TWA 1 beep flash per second plus sensor name on LCD Negative Drift or Over Range 3 be...

Page 34: ... key momentarily The buzzer will beep once and the LED and back light will flash once to indicate that these alarm signals are functioning correctly WARNING The alarm signals are disabled during PC communication calibration or datalog review operation To reduce the risk of exposure to hazardous atmospheres perform PC communication calibration or datalog review only in area known to be non hazardou...

Page 35: ...programmed time out period to save power In automatic mode the ambient light is sensed and the backlight will be turned on automatically if the ambient light is below a threshold level The back light will be turned off automatically when the ambient light exceeds the threshold level See Chapter 4 or 5 for details on how to set the back light mode and time out period from the monitor or a PC See Ch...

Page 36: ...h default alarm limits as listed below refer to Chapter 4 or Chapter 5 for programming procedures if new calibration or alarm limits is required Table 2 2 Factory Calibration and Preset Alarm Limits Gas ppm Cal Gas Balance Unit TWA STEL Low High LEL 50 Air LEL N A N A 10 20 O2 Air VOL N A N A 19 5 23 5 CO 50 Air ppm 35 100 35 200 H2S 25 N2 ppm 10 15 10 20 ...

Page 37: ...p speed The pump turns on automatically when the monitor is turned on and remains on during normal operation If liquid or other objects are sucked into the water trap filter in the inlet port and cause the pump to stall the monitor detects the obstruction and shuts down the pump immediately The alarm is activated and a flashing error message Pump is also displayed Remove the obstruction and press ...

Page 38: ...that they can be down loaded at a later time to a PC Datalog Options There are four ways to initiate the datalog operation automatic start and stop datalogging automatically when the monitor is turned on and off manual start and stop datalogging by pressing a key manually There is a timer available to setup the maximum datalogging time periodic start and stop datalogging daily based on preset time...

Page 39: ...d Information such as start time datalogging period alarm limits etc will be recorded in the event header followed by the measurement data If more than 900 measurement intervals are recorded in one event a new event will be created automatically Datalogging pause Under the following conditions the datalogging will be paused automatically 1 When entering programming mode datalogging will stop Upon ...

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Page 41: ... trap filter and remote sampling probe Dilution fitting Calibration adapter WARNING To reduce the risk of ignition of hazardous atmospheres recharge battery only in areas known to be non hazardous Remove and replace batteries only in areas known to be non hazardous Ne charger les batteries que dans l emplacements désignés non dangereux ...

Page 42: ... next page is required Press Y to start a full discharge and N to start the charging function The display will show Charging Battery x x V If a key is not pressed within ten seconds the charging will begin automatically Charging Battery 5 6V 3 The LED should be red in color when charging If the battery is fully charged the LED will change from red to green The red color indicates that the battery ...

Page 43: ...charging circuitry and algorithm It may be left connected to the charger indefinitely without damaging the battery The battery of the Q RAE monitor is drained slowly even when the monitor is turned off If the monitor has not been charged for 5 7 days the battery voltage may be low The NiCd battery is designed to last for 10 hours of normal operation no alarm no back light condition for a new batte...

Page 44: ...ed in emergency situations when there is no time to charge the NiCd battery Figure 3 1 Alkaline Battery Adapter To install the adapter remove the cover of the monitor Unplug the NiCd battery pack from the battery connector and plug the alkaline battery adapter into the battery connector The internal charging circuit will automatically detect the alkaline battery adapter and prevent charging of the...

Page 45: ...anifold which would cause extensive damage to the monitor It will also prevent any dust from entering the monitor and will prolong the operating life of the sensors and the pump To install the water trap filter simply slide the Tygon tubing onto the barbed inlet port on the monitor A male Luer connector fits to the female Luer of the filter To remove the filter disconnect the Luer connector ...

Page 46: ...pling probe or the Tygon tubing to the female Luer connector on the water trap filter The remote sampling probe or the Tygon tubing is ready for operation Warning Tygon tubing is recommended only for volatile compounds like methane propane CO H2S and O2 For LEL measurements of higher hydrocarbons it is recommended to use Teflon tubing For example one meter of Tygon tubing can completely absorb Jet...

Page 47: ...stible sensor can still be used under oxygen deficient conditions The other use of the dilution fitting is to measure H2S or CO when the concentration exceeds the upper limit of the sensor range To use the dilution fitting simply insert the fitting between the water trap filter and the remote sampling probe or extension tubing Make sure to set the dilution ratio in the programming mode see Section...

Page 48: ... inch piece of Teflon tubing also with a male Luer connector For calibration simply connect the Luer adapter to the water trap filter on the Q RAE monitor and the open Tygon or Teflon tubing to the metal adapter from the calibration gas regulator The Teflon adapter can also be used as a sampling probe during normal operation and is preferred for LEL measurements of less volatile compounds ...

Page 49: ...de intuitive end user operation The display shows the menu options and the key pad is used for menu selection and data entry Note The real time monitoring of the gas concentration continues while in the programming mode However during the calibration or review datalog procedures the real time monitoring will pause until the procedures are completed In addition entering programming mode will pause ...

Page 50: ...gh a PC see Section 5 0 for details on setting up the user mode The programming mode allows users to change the setup in the monitor calibrate the monitor and enter user information etc The programming functions are organized in a three tier menu structure Table 4 1 shows the first tier of the programming menu Each menu item includes several sub menus to perform additional programming functions Ap...

Page 51: ...s in the Level 2 However it does not allow a user to save any changes to the alarm limits real time clock correction factor user and site information etc A user can still perform calibration with Level 0 security The security level must be set using a PC see Chapter 5 for details on setting up the security level Once inside the programming mode LCD the first menu will be displayed To move through ...

Page 52: ...gramming mode as summarized below Table 4 2 Key Function in Programming Menu MODE Exit menu when press momentarily or exit data entry mode when pressed and held for 1 second Y Increase numerical value for data entry or confirm yes for a question N Decrease numerical value for data entry or deny no for a question ...

Page 53: ...security level is 1 or the monitor is in text mode after holding down the two keys for three seconds the display shows Enter Password 0000 with the left most digit flashing The user should enter a password starting from this flashing digit Note 1 Prior to factory shipment the Q RAE monitor was installed with 0000 as the default password Note 2 For added security 0000 is always displayed instead of...

Page 54: ...sword is correct the monitor enters the programming menu The first menu item Calibrate Monitor is displayed 8 If the password is incorrect the display shows Wrong Password and returns to the regular display of instantaneous gas readings 9 If the User mode is set to display mode a message Display Only Cannot enter is shown ...

Page 55: ...his is a two point calibration process using fresh air and the standard reference gas First fresh air containing 20 9 oxygen and no detectable toxic or combustible gases is used to set the zero point for the LEL CO and H2S sensors and the span for the O2 sensor Then a standard reference gas containng a known concentration of a given gas is used to set the second point of reference also known as sp...

Page 56: ...e latter method it is important that the gas flow is greater than the pump draw by at least 20 The Q RAE can also be calibrated directly from a cylinder using a fixed flow regulator with a flow rate between 0 5 and 1 0 liters per minute although this method is less accurate than the other 3 methods by a few percent The calibration adapter links up the inlet port of the Q RAE Monitor to the gas sam...

Page 57: ...r is the first menu item in Table 4 1 Press Y to perform calibration The first sub menu shows Fresh Air Calibration 2 If the fresh air bottle is available twist the Luer calibration adapter onto the inlet port of the Q RAE Monitor and connect the other end of the tube to the fresh gas bottle If the fresh air bottle is not available simply leave the monitor in an area free of any detectable vapor o...

Page 58: ... Y key to accept the multiple sensor selection and start the calibration or press the N key to modify the sensor selection and go to Step 7 CO H2S LEL OK OXY 2 Turn on the valve of the sampling bag to start the flow of the span gas Display shows Apply Mixed Gas and will wait for the calibration gas to reach the sensor When the calibration gas has reached the sensor the display will show calibratio...

Page 59: ...l appear Press the N or MODE key to abort the calibration and move directly to the next sub menu item Press the Y key to continue the next sensor calibration In either case the calibration datum for the current sensor is not changed 6 From Step 1 if the N key is pressed the display shows all the sensor names that are selected for multiple sensor calibration with the cursor blinking at the first se...

Page 60: ...eed to be calibrated during multiple sensor calibration are selected Press and hold the MODE key for 1 second to save the new sensor selection 8 The display shows Save To confirm the new selection press the Y key to accept the change and continue on with Step 2 Press the N key or the MODE key to discard the change and to continue on with Step 2 ...

Page 61: ...splay should show Single Sensor Calibration Press Y key The display shows all the installed sensors in the monitor with the cursor blinking at the first sensor location Press Y to select the highlighted sensor and start the calibration or press MODE momentarily to move to the next sensor location CO H2S LEL pick OXY 2 The monitor shows Apply XXX Gas and waits for the calibration gas to reach the s...

Page 62: ... gas calibration procedure for one sensor The display shows the single gas calibration sub menu for a user to select another sensor or move to the next calibration sub menu 4 Turn off the flow of gas Disconnect the calibration adapter from the Q RAE Monitor 5 Repeat Step 1 to Step 4 to calibrate the next sensor 6 Press MODE any time during Step 2 to reduce waiting time If the sensor failed the cal...

Page 63: ...g 19 5 to calibrate the oxygen sensor A question 0 oxygen will be asked Enter Y if pure nitrogen gas is used to calibrate the oxygen sensor Otherwise press N to calibrate oxygen sensor to another span oxygen value During either single or multiple sensor calibration the oxygen sensor will be calibrated to the span value defined in Section 4 4 4 Note After a 0 oxygen calibration the user must perfor...

Page 64: ...y for 1 second to accept the previously stored span gas value and move to the next calibration sub menu 3 Starting from the left most digit of the span gas value use Y or N key to change the digit value and press MODE key momentarily to advance to next digit the cursor will move to the next digit to the right Repeat this process until all span gas values are entered Press and hold the MODE for 1 s...

Page 65: ...led will appear 3 If the user does not want to change the LEL span gas press Y to accept the current selection and exit this sub menu 4 If the user wants to select a different LEL span gas press N key Then use the Y and N keys to scroll up or down through the list of gas names until the desired gas appears in the display and press MODE to select the new gas name 5 The display shows Save To confirm...

Page 66: ... 1 The sub menu item in Table 4 4 allows the user to change the high alarm limit low alarm limit STEL alarm limit or average alarm limit The average alarm limit can be Running Average or TWA Time Weight Average depending on the menu selection on Change Averaging Method see Section 4 7 8 Press N to cycle through the sub menu Press Y key to enter a sub menu and the display shows HIGH LOW STEL TWA or...

Page 67: ...ts right Repeat this process until all the new Alarm limits are entered Press and hold the MODE key for 1 second to exit data entry mode If there is any change to the existing value the display shows Save Press the Y key to accept the new value and move to the next sub menu Press the N key to discard the changes To preserve the previously stored alarm limit press and hold the MODE key for 1 second...

Page 68: ...up from the programming mode Users can also program additional datalog options in PC and downloaded them to the monitor see Section 5 0 for details on how to program additional datalogging options Table 4 5 shows the sub menus for datalog options Table 4 5 Datalog Sub Menu Reset Peak and Minimum Clear All Data Change Datalog Period Select Data Type View Datalog Enable Disable Datalog ...

Page 69: ...able 4 5 2 Press the Y key to clear the peak and minimum data memory Display shows Are You Sure to reconfirm whether to reset peak and minimum data 3 Press the Y key again will reset peak and minimum data 4 Press the N or MODE key to exit without resetting the data and move to next datalog sub menu Note STEL and TWA or AVG value will not be affected when peak and minimum values are reset ...

Page 70: ...ime values which are stored in the other location 1 Clear All Data is the next sub menu item in Table 4 5 2 Press the Y key to clear the data memory Display shows Are You Sure to re confirm the clearing of memory 3 Press the Y key again will erase all the data memory 4 Press the N or MODE key to exit without clearing the data memory and move to the next datalog sub menu ...

Page 71: ...he MODE key momentarily to advance to the next digit The flashing digit will move to the next digit to the right Repeat this process until all 4 digits of the new period are entered Press and hold the MODE key for 1 second to exit data entry mode If there is any change to the existing value the display will show Save Press the Y key to accept the new value and exit the datalog sub menu Press the N...

Page 72: ...urrently displayed data type Press N key to change to the other data type Data Type Peak Press MODE key to exit this sub menu and move on to the next sub menu 4 If there is any change to the existing selection press the Y key and the display will show Save Then press the Y key again to accept or the N key to discard the change and move to the next sub menu Note It is necessary to select Average da...

Page 73: ...review data of the first event The display shows the stored data of each sensor and the time stamp 1 0 2 8 20 20 5 3 Press the Y or N key to move forward or backward and view other data in this event When reaching the end or the beginning of the event the message Start of data or End of data appears Press MODE to exit the current event 4 Press N at Step 2 to see next event If there are no more eve...

Page 74: ...rked with an next to the sensor name The cursor is blinking at the first sensor location Press Y to enable the datalogging for the sensor and N to disable the datalogging CO H2S LEL pick OXY 3 Press the MODE key momentarily to move from one sensor location to the next one Repeat Step 2 until all the sensors that need to be datalogged are selected Press and hold MODE for 1 second to save the new se...

Page 75: ... enter user information for the Q RAE monitor Table 4 6 shows the sub menus for changing the monitor Table 4 6 Monitor Setup Sub Menu Change Site ID Change User ID Change Alarm Mode Change User Mode Change Real Time Clock Change Backlight Mode Change Password Change Pump Speed Change Averaging Method ...

Page 76: ... left most digit flashing 3 Press the Y or N key to cycle through all 26 letters and 10 numerals Press MODE key momentarily to advance to the next digit The flashing digit will move to the next digit to the right Repeat this process until all 8 digits of the new site ID are entered 4 Press and hold the MODE key for 1 second to exit the data entry mode and move to the next monitor setup sub menu 5 ...

Page 77: ... shows the current alarm mode selection Alarm Mode Latched 3 Press the Y key to accept the currently displayed alarm mode Press N key to change to the other alarm mode Alarm Mode Auto Reset Press MODE key to exit this sub menu and move to the next monitor setup sub menu 4 If there is any change to the existing selection pressing the y key the display will show Save Then press the Y key to accept o...

Page 78: ...Press MODE key to exit this sub menu and move to the next monitor setup sub menu 4 If there is any change to the existing selection pressing the y key the display will show Disable Program Are you Sure Then press the Y key to accept or the N key to discard and move to the next sub menu NOTE If the user mode is changed to display or text mode the user can no longer enter the programming menu Theref...

Page 79: ...left most digit of the date flashing 3 To modify this value use the Y or N key to change the digit value and press the MODE key momentarily to advance to the next digit The flashing digit will move on to next digit to its right Repeat this process until the new date and time values are entered Press and hold the MODE key for 1 second to exit data entry mode If there is any change to the existing v...

Page 80: ...cklight Mode 2 Press Y key the display shows the current back light mode Backlight Mode manual turn on 3 Press the Y key to accept the currently displayed backlight mode Press N key to change to the other backlight mode Backlight Mode manual turn on Press MODE key to exit this sub menu and move to the first monitor setup sub menu 4 If there is any change to the existing selection pressing the Y ke...

Page 81: ...ght Repeat this process until all 4 digits of the new password are entered 4 Press and hold the MODE key for 1 second to exit the data entry mode and move to the next monitor setup sub menu 5 If there is any change to the existing password the display shows Save Press the Y key to accept the new password Press the N key to discard the changes and move to the next sub menu 6 The monitor next asks f...

Page 82: ...rating conditions are slow to change Low may also be used to prolong pump motor life LEL sensor life and battery run time 1 Change Pump Motor Speed is the eighth sub menu item in Table 4 6 2 Press the Y key the display shows the current pump speed selection Pump Speed Low 3 Press the Y key to accept the currently displayed pump speed and move to the next monitor setup sub menu Press N key to chang...

Page 83: ...w on the LCD display wherever the average is indicated 1 Change Averaging Method is the ninth sub menu item in Table 4 6 2 Press the Y key the display shows the current average selection Average Type TWA 3 Press the Y key to accept the currently displayed type Press N key to change to the other selection Average Type Running Average and Y to select 4 If there is any change to the existing selectio...

Page 84: ... Ratio Before these sub menus are described the term Correction Factor needs to be explained Correction Factor The LEL sensors used in Q RAE respond to a broad range of gases that have different sensitivities The correction factor for a specific gas is defined as Sensitivity to a calibration gas Correction Factor ________________________ Sensitivity to a specific gas Correction factors are often u...

Page 85: ...e list to be the calibration gas and another gas to be the measurement gas For example the user can choose methane as the calibration gas for the LEL sensor and select pentane as the measurement gas The Q RAE monitor will calculate the correction factor between these two gases and convert the measured value of the LEL sensor into equivalent concentration of the pentane gas ...

Page 86: ...ate a custom factor for a specific gas or mixture of gases 1 Change LEL Gas Selection is the first sub menu item in Table 4 7 2 Press Y key If an LEL sensor is installed and enabled the display shows LEL Gas Methane Otherwise the message No LEL installed will be displayed and skip to Step 8 3 If the user does not want to change the LEL measurement gas press Y key to accept the current gas and skip...

Page 87: ...y and go to Step 8 To modify this factor press N key first Then starting from the left most digit use the Y or N key to change the digit value and press the MODE key momentarily to advance to the next digit The flashing digit will move on to next digit to its right Repeat this process until all 4 digits of the new factor are entered Press and hold the MODE key for 1 second to exit data entry mode ...

Page 88: ...ext to the sensor name The cursor will blink at the first sensor location Press Y key to enable the sensor and N key to disable the sensor A previously disabled sensor will show instead of the sensor name CO H2S LEL pick OXY 3 Press MODE key momentarily to move from one sensor location to the next one Repeat Step 2 until all the sensors that need to be enabled are selected Press and hold MODE key ...

Page 89: ...t dilution ratio Dilution Ratio xx with the left most digit flashing 3 Press the Y or N key to increase or decrease the value of the digit Press MODE momentarily to advance to the next digit The flashing digit will move to the next digit to the right Repeat this process until both digits of the new dilution ratio are entered 4 Press and hold the MODE key for 1 second to exit the data entry mode an...

Page 90: ...4 1 press the MODE key once Display shows an instantaneous reading of normal operation mode 2 To exit programming mode from 2nd tier sub menu level see Table 4 2 4 6 press the MODE key twice 3 To return to programming mode press and hold down both the MODE and N keys for 3 seconds as described in Section 4 4 ...

Page 91: ...ter PC under Windows 95 Windows 98 Windows NT 4 0 Windows ME and later environments It allows the user to configure the Q RAE through a user friendly interface and send the configuration information from the PC to the Q RAE monitor Collected data can also be extracted from the Q RAE to the PC in order to perform data analysis report generation or record keeping Installation and operation of this s...

Page 92: ...n click the Run from the start menu to display the Run dialog box If the setup diskette is in disk drive A type A Setup exe in the Open field as shown in Figure 5 1 Figure 5 1 Run Dialog Box Press the Enter key on the keyboard or click the OK button on the menu to start the setup process If the user choose the default settings in every steps of the process the ProRAE Suite software package will be...

Page 93: ...nu click the Programs menu item to display the Programs submenu then click the ProRAE Suite menu item to display the ProRAE Suite submenu There are two sub menu items under the ProRAE Suite submenu ProRAE Suite and Readme as shown in Figure 5 2 Click the ProRAE Suite sub menu item to start the ProRAE Suite software Figure 5 2 Start Menu ...

Page 94: ...he Q RAE monitor is ready for communication with PC During the communication session the PC will directly control the Q RAE monitor through the serial link There is no need for users to press any key on the Q RAE monitor during the communication session If no data transfer has occurred within one minute the Q RAE monitor will return to instantaneous reading display Note Do not connect to the paral...

Page 95: ...E Suite software Figure 5 3 ProRAE Suite Main Window The functions of ProRAE Suite software can be divided into three categories 1 Configuration data category This category includes editing the configuration data file sending the configuration data to the Q RAE monitor and receiving the configuration data from the Q RAE monitor etc 2 Logged data category This category includes receiving the logged...

Page 96: ...e frequently used functions are represented in this tool bar in the form of a small icon For example the Receive data function in the Communication sub menu is represented as a small arrow with the letters RECV When the mouse cursor a small arrow is positioned near each icon in the tool bar a short text will also appear at the bottom of the Window to describe the function of this icon This tool ba...

Page 97: ...g to the PC s serial port setup Figure 5 4 Setup Port Dialog Note In most PC s there are two serial ports Make sure that the serial port selected in the Setup Port dialog box matches the actual serial port connected to the Q RAE monitor The default serial port for ProRAE Suite is COM1 If the incorrect serial port is selected an error message of error occur during serial port initialization will ap...

Page 98: ...uration Data The ProRAE Suite software allows the user to edit the configuration data send the configuration data to the Q RAE and receive the configuration data from the Q RAE monitor The following subsections describe the details of each operation ...

Page 99: ...n of the monitor From the main menu of the ProRAE Suite software select the Receive Configuration menu item from the Communication dropdown menu and then click the OK if the unit is connected to the communication port and ready To load a saved configuration file From the main menu select Open from the File dropdown menu a dialog box appears Select the Files of type to Config Files cfg as shown in ...

Page 100: ... For example Default_Q RAE_V216 cfg means this file is for Q RAE monitor and its version is V2 16 Choose a configuration file by highlighting the file name and press the Enter key or click the OK button on the dialog box Once the configuration file is open the configuration data are displayed in the newly opened client window as shown in Figure 5 6 Figure 5 6 Displayed Configuration Data To edit t...

Page 101: ...al Gas Parameters Gas Selection and Others To change a specific configuration setting click the corresponding tab page header to bring that tab page to the front then change the configuration setting on that tab page When finished editing the configuration settings click the OK button to close the Edit Configuration File dialog box The new values of the configuration settings will be reflected in ...

Page 102: ...ed changes to monitor settings that can be changed by using the programming menu of the Q RAE monitor when the instrument is in the programming mode Level 0 allows a user to enter the programming menu without password checking but does not allow changes to alarm limits real time clock correction factor or user and site information etc The user can still perform calibrations If Level 1 is selected ...

Page 103: ...on but cannot enter the programming menu In the Program mode the user can enter the programming mode to calibrate the monitor or change various setups in the monitor Warm up Time This option allows the user to choose the warm up time of the instrument in seconds Comfort Beep This option allows the user to specify a time interval that the buzzer will beep once to remind the user that the monitor is...

Page 104: ...ws the PC clock to be downloaded to the Q RAE monitor so that the user does not need to manually set the clock in the Q RAE monitor Pump Speed This option allows the user to choose the high pump speed or low pump speed for the Q RAE monitor Measure The user can choose to record the average or peak Max reading of all the sensors during each datalog period Datalog Interval The datalog interval is th...

Page 105: ...ation The maximum run time determines an automatic end to the datalog or it can be stopped manually If Periodic start stop or daily mode is chosen the user must specify the start and stop hour and minute The interval between start and stop is the period of time the monitor will datalog at data logging period rate With Scheduled start stop all the entry boxes for year month day hour and minute for ...

Page 106: ...ill start datalogging When the stop date time is reached the datalogging will stop automatically With periodic start stop mode the hours and minutes are used for the data log period to be run each day Figure 5 8 shows the Gas Parameters tab page which allows the user to change the gas parameters of the configuration data The following is the description of each field in the Gas Parameters tab page...

Page 107: ... TWA low alarm and high alarm levels ppm can be specified for the H2S sensor CO Alarm Levels ppm This is the place where the user can specify the STEL alarm level ppm TWA alarm level ppm low alarm level ppm and high alarm level ppm for the CO sensor Alarm mode If Auto reset is chosen the alarm will stop as soon as the alarm condition goes away The alarm will remain on if the Latched option is chos...

Page 108: ...s mode to ensure that the monitor is in a fresh air environment when turned on Calibration span The user can specify the calibration gas span for LEL OXY H2S and CO sensors here Figure 5 9 Gas Selection Settings Tab Page Figure 5 9 shows the Gas Selection tab page There are three sets of gases for correction factors that the user can choose for the LEL sensor The following is the ...

Page 109: ...om gas name up to 16 characters long and a custom correction factor If the measurement and calibration gases are different the monitor automatically calculates a correction factor and applies it to the readings to give a proper LEL value for the measurement gas In the Others tab the user can put in a power on customized name The name will be displayed when the unit is powered on The user can also ...

Page 110: ...aking sure that the instrument is connected to the PC click the OK button to start the data transfer After the configuration information is sent successfully a message box will appear to indicate that the sending configuration process is completed Click the OK button to close the message box If the communication is not successful an error message indicating that there is no response from the instr...

Page 111: ...configuration information for future use user can click File Save or File Save As menu item to save the opened configuration data to a file Once the configuration file is saved on disk it can be opened at a later time for further modification or can be sent to the Q RAE monitor ...

Page 112: ...to warn the user that this operation will erase all the current configuration settings in the monitor If the user does not want this to happen click the Cancel button otherwise click the OK button to start the data transfer After the information is sent successfully a message box will appear to indicate that the sending configuration process is completed Click the OK button to close the message bo...

Page 113: ...COMPUTER INTERFACE 5 23 LCD contrast threshold etc Try not to use this function if possible ...

Page 114: ...The ProRAE Suite software allows the user to retrieve the logged data from the Q RAE monitor and display the data in many different formats The user can also export the displayed text to a tab delimited text file so that Microsoft Excel can read it directly ...

Page 115: ...emind the user to connect the instrument to the PC through the serial port After making sure the instrument is connected to the PC click the OK button to start the data transfer After the data transfer is finished a new client window is opened with the newly received logged data displayed In order to save the logged data for future use the user can click File Save or File Save As menu item to save...

Page 116: ...which lists all the display format of each event and the right pane displays the information according to the display format and the event the user selected on the left pane To select any display format of any event the user can simply click the format item on the left pane To view the next event or the previous event the user can click the Next Event double right arrow or the Previous Event doubl...

Page 117: ...e if that pane is not big enough To view the data points of a specific event the user can click the item representing that event under the item Data Text Mode For example click the item Event 1 on the left pane the right pane displays the data points of event 1 as shown in Figure 5 10 ...

Page 118: ... STEL TWA or AVG value of any event click the event number item under the tree item STEL TWA AVG in the left pane the right pane displays the STEL TWA and AVG value of each data points of that event as shown in Figure 5 11 Figure 5 11 STEL TWA AVG of the Logged Data ...

Page 119: ...formation of any event such as peak data value and minimum data value click the event number item under the tree item Summary in the left pane the right pane displays the summary information of that event as shown in Figure 5 12 Figure 5 12 Summary Information of the Logged Data ...

Page 120: ...e The user can choose the type of sensor data in the Graph Type tab page of the Graph Settings dialog box To display the Graph Settings dialog box click any place in the right pane so that pane has the focus then click Option Graph Settings menu item to display the Graph Settings dialog box Figure 5 14 shows the Graph Type tab page of the Graph Settings dialog box This is the place where the user ...

Page 121: ...ngs dialog box click any place in the right pane so that pane has the focus then click Option Graph Settings menu item to display the Graph Settings dialog box To bring the Graph Range tab page the user can simply click the page header of the Graph Range tab page Figure 5 15 shows the Graph Range tab page of the Graph Settings dialog box This is the place where the user can choose the graph range ...

Page 122: ... can specify the top value and the bottom value in the Data Value Range Y axis group box If the user select the Default radio button in the Y Axis Data Value Range group box the ProRAE Suite software will scale the range of Y axis by itself to cover the maximum data value on y axis To choose the range of X axis the user first click the User Defined radio button in the X Axis Data Time Range ...

Page 123: ... the Start Time X axis group box and the end time fields in the End Time X axis group box If the user select the Default radio button in the X Axis Data Time Range group box the ProRAE Suite will scale the range of X axis by itself to cover the every data points on x axis ...

Page 124: ...ext displayed in the right pane to a tab delimited text file click Option Export Text menu item a Save As dialog box is displayed Specify the file name in the File name field then click the OK button to close the Save As dialog box A new file is created that can be read by Microsoft Excel directly Appendix C shows a detailed step by step instruction on how to export data as text file and use Micro...

Page 125: ...indows bitmap or metafile file first click any place in the right pane to make sure that the graph pane has the focus then click Option Export Graph menu item to display a Save As dialog box Select the export graph file type bmp or wmf in the Save as type field then specify the export file name in the File name field Click OK button to close the Save As dialog box The newly created graph file cont...

Page 126: ... or graphic data report First click any place in the right pane to set the focus on that pane then select Print function from the File sub menu or click the Print toolbar button a printer to print the graphic or text data A printer setup dialog box will appear before the printing starts so that the paper size orientation printer type etc can be configured correctly ...

Page 127: ... Figure 5 16 Figure 5 16 Main Window of ProRAE Suite Click Option Enable Datalog menu item a message box will appear to remind the user to connect the instrument to the PC through the serial port After making sure that the Q RAE monitor is connected to the PC click the OK button to start After the ProRAE Suite software made successful contact to the instrument connected to the PC a dialog box is d...

Page 128: ...the three digit authorization code in the Authorization Code field then click the OK button to close the dialog box After the datalog option is changed a message box will appear on the screen to let the user know that the datalog option is successfully changed Note Each Q RAE with datalogging function should be shipped with a 3 digit authorization code If the code is missing call the factory s Cus...

Page 129: ...the serial port After making sure that the instrument is connected to the PC click the OK button After the ProRAE Suite software made successful contact to the instrument connected to the PC an Open file dialog box is displayed as shown on Figure 5 18 Select the firmware file a07 which is going to be loaded into the instrument click the OK button to start the loading process After the firmware loa...

Page 130: ......

Page 131: ...is used to measure combustible gases An electrochemical sensor is used to measure oxygen concentration Figure 6 1 Block Diagram of Q RAE Monitor A diaphragm pump draws the air sample into the sensor manifold and then distributes it to all sensors A single chip microcomputer is used to control the operation of the alarm buzzer LED pump and light sensor Micro processor LCD Display Keypad Serial Port...

Page 132: ...o display the readings The user interacts with the monitor through three keys on the front panel keypad A rechargeable Ni Cd or Li ion battery pack or a four AA alkaline battery pack powers the monitor NOTE The printed circuit board of the monitor is connected to the battery pack even if the power is turned off Therefore it is very important to disconnect the battery pack before servicing or repla...

Page 133: ...NTENANCE As shown in Figure 7 1 the major maintenance items of Q RAE are Battery pack Sensor modules Sampling pump Figure 7 1 Main Components of Q RAE Monitor Cover Battery Pack Monitor Case Water Trap Case Screw Gas Plate ...

Page 134: ...tended life Li ion battery for at least 18 hours The charging time is less than 10 hours for a fully discharged battery The built in charging circuit is controlled by two step constant voltage constant current charging to prevent over charging The monitor recognizes a Li ion vs NiCd battery pack and allows the user to perform a deep discharge only on NiCd batteries but not on Li ion batteries WARN...

Page 135: ...tional for charging 5 Replace a fully charged spare battery pack in the Q RAE 6 Ensure the battery plug is securely connected to the Q RAE 7 Close the Q RAE cover and tighten the screws Replacing Alkaline Battery Adapter 1 Insert four fresh AA size alkaline batteries into the alkaline battery adapter Make sure that the polarity of the battery is correct 2 Follow the same procedure as described abo...

Page 136: ... that the user should replace the sensor when the current date exceeds the expiration date of a sensor However the sensor can be used beyond the expiration date as long as the sensitivity is adequate for the purposes of the measurements Contact the service department to determine the viablitiy of sensors that are past expiration Sensor Replacement Procedure The hydrogen sulfide carbon monoxide oxy...

Page 137: ...fer to Figure 7 2 carefully unscrew four No 2 screws that hold down the gas piping plate to the analog PCB and sensors Remove the gas piping plate 4 Refer to Figure 7 2 identify the location of a specific sensor and remove the sensor by gently pulling upward ...

Page 138: ...nd the sensor pins are aligned with the socket before pushing down the sensor 6 Replace the gas piping plate and tighten the four screws to hold down the sensors Re connect the battery pack Replace the monitor cover 7 Turn on the power of the Q RAE The microprocessor will automatically recognize the sensors installed and configure the monitor accordingly ...

Page 139: ...e monitor cover disconnect the battery pack carefully unscrew four No 2 screws that hold down the gas piping plate to the analog PCB and sensors Remove the gas piping plate 3 Carefully loosen the connector Unscrew the two screws that hold the pump assembly to the gas plate Disconnect the Tygon tubing that connects the pump to the gas inlet port 4 Install a new pump assembly Connect the Tygon tubin...

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Page 141: ...the troubleshooting table in Section 8 2 the user can usually narrow the problem down to one or two areas and correct the problem without having to return the monitor for repair WARNING The diagnostic mode allows the user to set several low level parameters that are very critical to the operation of the monitor Extra care should be taken when setting these low level parameters If the user are not ...

Page 142: ...er the required delay release both keys the monitor will now go through the normal start up display sequence and display a Diagnostic mode message At the end of the special mode start up the display will show four numbers with a message Raw These numbers are raw sensor readings without calibration Other critical parameters of the monitor are available as shown in Table 8 1 They can be reached by p...

Page 143: ... power on off MODE Show clock battery voltage and temperature MODE Show LEL OXY sensor expiration date MODE Show H2S CO sensor expiration date MODE Adjust pump stall threshold MODE Adjust back light on off threshold MODE Show serial number and toggle pump speed MODE Begin battery deep discharge MODE Show battery duration time MODE Communicate with PC ...

Page 144: ...ective When a specific gas is applied to the monitor the corresponding sensor should respond and the raw reading should increase or decrease If the reading of the corresponding sensor does not change when the specific gas is applied then the sensor may be defective 365 373 530 RAW 1879 2 Sensor Name The carbon monoxide hydrogen sulfide oxygen and LEL sensors have a non volatile memory that contain...

Page 145: ... OFF This display shows the present condition of the LEL sensor power and raw reading The top display shows the instantaneous reading of raw counts from the LEL sensor The bottom line shows if the LEL sensor is powered By pressing N key the power can be turned off The Y key turns powers to the LEL on 6 Show Clock Battery and Temperature This display shows the real time clock battery voltage in raw...

Page 146: ...first row Pump xxx zzz The current pump stall value is displayed on the second row Stall yyy The typical maximum pump current without any blockage should be between 20 35 when the speed is set to be low and the water trap filter is installed The typical stall value should be higher than the un blocked pump current by at least 5 8 counts b The user can block the gas inlet for about ten seconds and ...

Page 147: ...erial Number and Pump Toggle This display shows the unit s serial number If a pump is installed and pump speed control circuit available the display Pump Low High may be toggled by pressing the N key Note that changes made here are only for testing the pump condition and are not saved in the nonvolatile memory see Section 4 7 to update the pump speed setting 11 Display Battery Duration Time This d...

Page 148: ...e battery Microcomputer hang up Solutions Charge or replace battery Disconnect then connect battery to reset computer No LED or LCD back light Reasons Defective LED or LCD back light Solutions Call authorized service center Lost password Solutions Call authorized service center Buzzer inoperative Reasons Bad buzzer or wire connection Solutions Call authorized service center ...

Page 149: ...sor module Dirty water trap filter Excessive moisture and water condensation Solutions Re calibrate with the gas Clean sensor module Replace water trap filter Blow dry the sensor module Reading abnormally low Reasons Incorrect calibration Low sensitivity to the specific gas Solutions Calibrate the monitor Replace sensor ...

Page 150: ...Wait for reading to stabilized Reading jumping around randomly Reasons Incorrect gas calibration Low sensitivity to cal gas Solutions Calibrate the sensor Use different cal gas Cannot turn off monitor or corrupted characters in LCD display Reasons Microprocessor hang up Solutions Disconnect and re connect battery to reset computer Call authorized service center Calibration error message Reasons No...

Page 151: ...g AC adapter or AC adapter does not fully plug in Solutions Check battery and adapter Detach and plug in the adapter again Full scale measurement in humid environment Reasons Dirty or wet sensor Solutions Clean sensor in ultrasonic bath and dry thoroughly Replace water trap filter Excessive pump noise or no inlet air vacuum Reasons Leaky inlet path Defective pump Solutions Check inlet connection R...

Page 152: ...APPENDIX A A 1 ...

Page 153: ...k to instantaneous display Correct password Enter Programming menu N Toggle back light Y Test alarm stop alarm MODE Display Battery voltage MODE Print Reading if printer option is enabled MODE Communicate with PC Y Monitor will pause OK Y Ready N Return to Instantaneous display Sensor names alternately MODE or N Return to Instantaneous display Sensor names alternately ...

Page 154: ...rogramming menu N Toggle back light Y Test alarm stop alarm MODE Display Peak values MODE Display Min values MODE Display STEL values MODE Display TWA values MODE Display Battery voltage MODE Print Reading if printer option is enabled MODE Communicate with PC Y Monitor will pause OK Y Ready N Return to Instantaneous display MODE or N Return to Instantaneous display Sensor names alternately ...

Page 155: ...y STEL values MODE Display TWA values MODE Display Battery voltage MODE Display Clock Run time Internal temperature MODE For datalog function unit only Configured for Manual datalog Yes Start Stop Datalog Y Start or Stop Datalog M go to Display LEL gas name No Display Datalog mode MODE Display LEL gas name MODE Print Reading if printer option is enabled MODE Communicate with PC Y Monitor will paus...

Page 156: ...ange STEL alarm limit Change Average alarm limit View or Change Datalog Reset Peak and Minimum Clear All Data Change Datalog Period Select Data Type View Datalog Enable Disable Datalog Change Monitor Setup Change Site ID Change User ID Change Alarm Mode Change User Mode Change Real Time Clock Change Backlight Mode Change Password Change Pump Speed Change Averaging Method Change Sensor Configuratio...

Page 157: ...ctors Table B 1 Correction Factors for LEL Sensor Compound LEL CF Acetaldehyde 1 8 Acetic acid 3 4 Acetone 2 6 Ammonia 0 79 Benzene 2 1 Butadiene 2 5 Butane n 2 0 Carbon disulfide 4 Carbon monoxide 1 2 Cyclohexane 2 5 Dichloromethane 1 0 Ethanol 1 7 Ethene 1 5 Ethyl acetate 2 2 Ethyl benzene 2 8 Ethyl ether 2 3 Gasoline 2 1 Heptane n 2 4 Hexane n 2 3 Hydrogen 1 2 Hydrogen sulfide 2 3 Isobutane 1 8...

Page 158: ...le B 1 are measured relative to methane gas All measurements are at 5 relative humidity and 25oC typically at 20 80 LEL The factors may change at higher concentrations or different temperature and humidity conditions The factors are to be multiplied by the reading to obtain the actual LEL of the gas after calibration to methane If the correction factor of a gas is 1 0 then the sensitivity to the g...

Page 159: ...sion 7 0 for further data manipulation or graphing To convert the data file into Excel and to facilitate easier data manipulation the following procedure may be followed 1 Export the event data to a tab delimited text file as described in section 5 6 6 Export the displayed data to a text file Assume we have just exported the event data to a file called TextEvent txt in C To convert that file to a ...

Page 160: ...where the file TextEvent txt resides and select the Files of type as Text Files Click to select the file TextEvent txt as shown in Figure C 2 Figure C 2 Open Dialog Box 3 Click the OK button a Text Import Wizard dialog box is open as shown in Figure C 3 Figure C 3 Text Import Wizard Dialog Box ...

Page 161: ...save the loaded event data to a MS Excel file Ensure that in the Save As dialog box the Save as type is Microsoft Excel Workbook Graphing Q RAE Data in Excel 1 Open the Excel data file that contains the data to be graphed by selecting File and then Open Highlight the columns that contain the data points Make sure that the header information is not highlighted 2 Go to the Insert menu and under Char...

Page 162: ...e Next button to continue 4 The next step will show the different chart types For this example the Line chart has been selected Press the Next button to continue 5 Step 3 of the ChartWizard give additional choices for the line chart including data markers and gridlines In this example number 4 has been selected so there will be markers and gridlines ...

Page 163: ... that comprises the chart Press the Next button to continue 7 The final step is where the chart title and axis titles may be added After these are added press the Finish 8 A sample of a finished chart is below For additional information and other modifications that can be made to the Excel chart please refer to the Excel instruction manual ...

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Page 165: ...at a Glance p TN 117 ToxiRAE Combustible Gas Monitor PGM 37 at a Glance p TN 118 Use of RAE PIDs for Soil Headspace Measurements p TN 119 Calculation of STEL TWA Min Max and Average Values for ToxiRAE PID p TN 120 Measuring Correction Factors for Volatile Compounds with MiniRAE 7 and ToxiRAE PIDs p TN 121 CO Sensor Cross Sensitivity and Removal with Charcoal Filter p TN 122 MiniRAE Compliance with...

Page 166: ...UV Lamps in a PID Monitor p TN 147 UltraRAE Butadiene Specific Monitor p TN 148 Measurement of Phosphine PH3 by PID In the Food Storage industry p TN 149 PGM 30 UV Lamp Care p TN 150 Understanding the ppbRAE p TN 151 Electrochemical Sensor Replacement and Maintenance p TN 152 Effects of Operating Conditions on Oxygen Sensors p TN 153 TC Sensor Applications and Correction Factors p TN 154 SampleRAE...

Page 167: ...s p AP 212 PIDs for Indoor Air Quality p AP 213 ModuRAE PID Configuration and Applications p AP 214 Environmental Applications for PIDs p AP 215 Gas Detection in the Marine Industry p AP 216 Weapons of Mass Destruction p AP 217 Confined Spaces in the Construction Industry p AP 218 Lengthening the Interval Between Calibration Checks p AP 219 Using PIDs for 10 of LEL Decisions p AP 220 Using PIDs in...

Page 168: ...inting For hard copies Photocopy this page and fax to Attn Literature Department 1 408 752 0724 FAX Please send me the following information Name Company Mailing Address City State Zip Country Telephone Fax Technical Notes just list TN Application Notes just list AP Comments Thank you RAE Systems Sales Marketing Department ...

Page 169: ...website www raesystems com We will return fax the RMA Number and instructions on how to ship We must obtain the following information in full Name Company Shipping Address City State Zip Telephone Fax Serial number Model Reason for return Note When returning an instrument for repair please send only the monitor that needs to be worked on without any additional accessories Only send accessories wit...

Page 170: ...EL 408 752 0723 FAX 408 752 0724 Toll Free Numbers Instrument Sales 877 RAE CUSTomer 723 2878 Technical Service 888 RAE 4800 723 4800 Tube Sales 888 RAE TUBE 723 8823 E mail Instrument Sales raesales raesystems com Technical Service tech raesystems com World Wide Web site www raesystems com ...

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