watchman-multigas-mo..
Contents
1. Response Time 90 of final reading in 30 seconds normal temperature range SULFUR DIOXIDE APPROPRIATE MODELS ONLY Range 20 ppm SO2 Resolution 1 ppm SO2 Reproducibility 2 ppm SO or 1096 of reading whichever is greater Response Time 90 of final reading in 30 seconds normal temperature range TEMPERATURE RANGE Normal 0 to 40 C Extended 18 to 40 C 4 1 Section 4 Performance Specifications Relative Responses to Combustible Gases The following relative responses to selected combustible gases are typical of an instrument calibrated using Pentane Isobutyl Acetate Isopropyl Alcohol Methane Methanol Methyl Isobutyl ketone Methylcyclohexane to get the true LEL 4 These conversion factors should be used only if the combustible gas is known 5 These conversion factors are typical for a Watchman Multigas Monitor Individual units may vary by 25 from these values Methyl Ethyl Ketone 4 2 MULTIPLY MULTIPLY COMBUSTIBLE GAS LEL COMBUSTIBLE GAS LEL READING BY READING BY Acetone 1 1 Methyl Tertiary Butyl Ether 1 0 Acetylene 0 7 Acrylonitrile 0 8 Mineral Spirits 1 1 Benzene 14 iso Octane 1 1 Butane 10 n Pentane 1 0 1 3 Butadiene 0 9 Propane OS n Butanol 1 8 Propylene 0 8 22. A WARNING Do not activate the fresh air setup unless you are certain you are in fresh uncontaminated air otherwise inaccurate readings may occur These inaccurate readings may falsely indicate that a hazardous atmosphere is safe and injury or death could occur If you have any doubts as to the quality of the surrounding air do not use the fresh air setup feature 2 17 Chapter 2 Using the Watchman Multigas Monitor When the FIGURE 2 19 display appears The Watchman Monitor is ready for its Fresh Air Set Up To Proceed With Fresh Air Setup IO rm T8 ee TOR 1 Press the RESET YES button a NES 2 the display reads FRESH AIR SET UP PLEASE WAIT Figure 2 19 Fresh Air Set up COMB 02 FRESH AIR SETUP NO YES a If the instrument detects too great a zero error during the FAS the display reads FRESH AIR SET UP ERROR CANCELED e Alarm sounds e Lights flash 1 Push the RESET button to silence the alarm and return to the Exposure display page 2 To continue with a Fresh Air Setup make certain the Watchman Multigas Monitor is in fresh air move to another location if necessary Allow the Watchman Monitor to warm up for a few minutes to allow the sensors to stabilize 3 Turn the Watchman Monitor OFF and then back ON again 4 If the Watchman Monitor cancels the Fresh air Setup request again calibration adjustments may be required Report to the person responsible for Watc
3. Carbon Disulfide 2 2 styrene 13 Cyclohexane 14 Tetrahydrofuran 0 9 2 2 Dimethylbutane 12 TOMOS 11 2 3 Dimethylpentane 1 2 Vinyl Acetate Dre Ethane 0 7 VM amp P Naptha 1 6 Ethyl Acetate 1 2 Gong ke Response Notes Ethyl Alcohol 0 8 1 The compounds may reduce the Ethylene 0 7 aral of the IR Ib E 2 sensor by poisoning or inhibiting the Formaldehyde 0 5 catalytic action Gasoline unleaded 1 3 2 These compounds may reduce the sensitivity of the combustible gas Heptane 1 1 sensor by polymerizing on the catalytic surface Hydrogen 0 6 3 For an instrument calibrated on n Hexane 1 3 Pentane multiply the displayed LEL Isobutane 0 9 value by the conversion factor above 1 5 1 1 0 5 0 6 1 1 1 1 1 1 Section 4 Performance Specifications Interference Gases Cross Sensitivity SAMPLE RESPONSE SAMPLE RESPONSE Carbon Monoxide Sensors Nitric Oxide Sensors 1000 ppm Toluene Air 10 ppm Hydrogen Sulfide 0 5896 Benzene Air 60 ppm Carbon Monoxide 1 696 Acetone Air 10 ppm Chlorine ne 100 ppm Isobutylene Air 10 ppm Hydrogen Cyanide 0 896 Hydrogen Air 1000 10 ppm Nitrogen Dioxide 0 7596 Pentane Air 1 O O O O O N 10 ppm Sulfur Dioxide 3 9 CO2 N2 1 These responses are typical over the 7 5 ppm Chlorine Air 0 entire 10 C to 40 C t
4. 8 Oxygen Measurements eee 2 8 Table of Contents Figure 2 8 Oxygen Alarm Flag aa 2 8 A WARNING 2 2 9 Toxic Gas Measurement eese 2 9 4a WARNING 2 a 2 9 Figure 2 9 Peak Readings cece eee eee eee 2 9 OPLIONS ra wa ty haha EAR ER LR E Na dane 2 10 Optional Displays 2 2 10 Peaksreadings CHE CREE MAG he Se odes 2 10 Figure 2 10 Reset Peak Readings 2 10 Figure 2 11 STEL Alarm Flag 0 00 cece eee ee 2 10 Short Term Exposure Limit STEL a 2 11 4a WARNING 2 2 11 Figure 2 12 Reset TWA Page 0 2 11 Time Weighted Average TWA 0 00 a 2 12 4a WARNING 2 2 12 D ta Tagging lt a bla bm HRS pee ee 2 13 Figure 2 13 Data Tag Recording Select Page 2 13 Figure 2 14 Data Tag Confirmation Page 2 13 Figure 2 15 Data Tag Entry Page 2 13 Figure 2 16 Sample Data Tag Entry 2 14 Figure 2 17 Data Tag Acceptance Page 2 14 Optional Sampling Equipment 000 eee eee 2 15 Figure 2718 Tumi PE Naan IRURE SE a 2 15 Using Sampling Equipment essere 2 16 4a WARNING sssssss RI nn 2 16 AS CAUTION e nagbuga che lup SEED LE 2 17 Removing Sampling Equipment eee 2 17 Fresh Air Set Up Option c cece eee 2 17 4a WARNING ssssssss RII 2 17 To Proceed With Fresh A
5. LEL or nenge 0 to 5 CHa Resolution 1 LEL or 0 1 CH4 Reproducibility 3 LEL to 50 LEL reading 5 LEL to full scale or 0 296 CH4 to 2 5 Methane 0 396 CH4 to full scale Response Time 90 of final reading in 12 seconds normal temperature range Range 0 to 25 O2 Resolution 0 196 O2 Reproducibility 0 3 Oa for 2 to 25 O2 OXYGEN 90 of e normal temperature Response Time final A reading 3 minutes extended temperature range Range 0 to 1000 ppm CO CARBON Resolution 1 ppm CO MONOXIDE 2 ppm CO or APPROPRIATE MODELS ONLY Reproducibility 10 of reading whichever is greater Response Time 90 of final reading in 25 seconds normal temperature range HYDROGEN SULFIDE APPROPRIATE MODELS ONLY Range Resolution 50 ppm H2S 1 ppm H2S Reproducibility 2 ppm HeS or 1096 of reading whichever is greater Response Time 90 of final reading in 20 seconds normal temperature range NITROGEN DIOXIDE APPROPRIATE MODELS ONLY Range 20 ppm NO2 Resolution 1 ppm NO2 2 ppm NO or Reproducibility 1096 of reading whichever is greater Response Time 9096 of final reading in 35 seconds normal temperature range NITRIC OXIDE APPROPRIATE MODELS ONLY Range 100 ppm NO Resolution 1 ppm NO 2 ppm NO or Reproducibility 10 of reading whichever is greater
6. Sensors These models draw a small amount of power at all times even when turned OFF in order to maintain a voltage on toxic gas sensors and keep them ready for immediate use e When the Watchman Monitor is stored for less than 20 days recharge the rechargeable battery pack 3 1 Chapter 3 General Maintenance e To store these models for more than 20 days attach the unit to a battery charger and charge with the proper MSA charger A WARNING After storage always recheck instrument calibration before use During storage sensors may drift or become inoperative and may not provide warnings of danger to the health and lives of users Shipment 3 2 1 Disconnect the battery pack before shipment When the Watchman Monitor is returned for repairs be sure to include the normally used battery pack with the instrument 2 Packthe Watchman Monitor in its original shipping container with suitable padding If the original container is unavailable ask your MSA representative for a replacement An equivalent container may be substituted if necessary In either case seal the instrument in a plastic bag to protect it from moisture Protect the Watchman Monitor from the rigors of handling with sufficient padding Damage due to improper packaging or damage in shipment is not covered by the instrument s warranty Chapter 4 Performance Specifications Section 4 Performance Specifications COMBUSTIBLE GAS 0 to 100
7. either the high or low Oxygen Alarm Setpoint e Alarm sounds e Alarm light flashes e Concentration of gas flashes in the display FIGURE 2 8 A WARNING When the OXYGEN alarm sounds you may be in a life threatening situation You must follow your company s work and safety procedures If you do not follow those procedures you could be seriously injured or killed Toxic Gas Measurement The Watchman Monitor detects certain toxic gases in the atmosphere Your instrument may have one two or three toxic sensors Each of these sensors has a setpoint which causes an alarm if the gas level goes above that setpoint When this happens e The Alarm sounds The Alarm lights flash and e The concentration of gas flashes in the display A WARNING Whenthe TOXIC GASalarm sounds you may beina life threatening situation COMB 02 NNNN PEAK NNNN NNNN NNNN NNNN ppm TOX ppm TOX ppm TOX Figure 2 9 Peak Readings 2 9 Chapter 2 Using the Watchman Multigas Monitor You must follow your company s work and safety procedures If you do not follow those procedures you could be seriously injured or killed B RESET PEAKS xo es ppm TOX ppm TOX ppm TOX Figure 2 10 Reset Peak Headings Options Optional Displays NOTE The following display pages appear only if enabled by internal switches see the Watchman Monitor Technical Manual Chapter 1 for instructions Press the PAGE bu
8. the Exposure display to the Battery Condition page press the PAGE button The FIGURE 2 5 display appears e v v is the voltage from the battery e cccc is one of three battery conditions that can be displayed on the Battery display page e OK enough voltage to function properly e LOW BATT appears in the Exposure Display Page Horn sounds Press the RESET button to silence it After initial LOW warning the horn sounds approximately every five minutes 2 4 Chapter 2 Using the Watchman Multigas Monitor The battery will operate the Watchman Monitor for approximately 30 more minutes provided the RESET button is pressed after each warning The instrument will continue to operate until the power is turned OFF or the battery condition is at BATTERY SHUTDOWN level e BATTERY SHUTDOWN the battery is no longer able to operate the instrument and BATTERY SHUTDOWN appears in place of the Exposure Display Page Horn sounds continuously and cannot be reset Alarm lights flash No other pages can be viewed After approximately five minutes the instrument shuts down automatically A WARNING When the Battery Shutdown condition sounds stop using the instrument It cannot alert you of potential hazards because it does not have enough power to operate properly You must 1 Leave the area immediately 2 Turn OFF the instrument if it is ON 3 Report to the person responsible for maintenance Replace or rec
9. to restart It cannot restart until the sampling line is opened When the line is open the pump restarts automatically 2 16 Chapter 2 Using the Watchman Multigas Monitor Instruments with Pumps and Electronic Flow Indicators With the pump running block the sample line inlet or probe inlet e The blocked flow flag on the display must illuminate and an audible alarm must sound If there are questions regarding this information please contact MSA Customer Service at 1800 MSA 2222 b Press the RESET button to reset the alarm A CAUTION Never let the end of the sampling line touch or go under any liquid surface If liquid is sucked into the instrument readings will be inaccurate and the instrument could be damaged We recommend the use of an MSA sample line water trap P N 497199 containing a special membrane filter permeable to gas but impermeable to water to prevent such an occurrence This line trap is installed between the sample line and the instrument by screwing onto the inlet of the instrument than screwing on the sample line and probe Removing Sampling Equipment 1 Turn OFF the Watchman Monitor 2 Unscrew the connector ring on the sampling line and remove the sampling line Fresh Air Set Up Option for automatic zero adjustment of the Watchman Monitor sensors NOTE The Fresh Air setup has limits If a dangerous level of gas is present the Watchman Monitor ignores the FAS command and goes into alarm
10. MSA Watchman Multigas Monitor Instruction Manual WARNING THIS MANUAL MUST BE CAREFULLY READ BY ALL INDIVIDUALS WHO HAVE OR WILL HAVE THE RESPONSIBILITY FOR USING OR SERVICING THE PRODUCT Like any piece of complex equipment the unit will perform as designed only if it is used and serviced in accordance with the manufacturer s instructions OTHERWISE IT COULD FAIL TO PERFORM AS DESIGNED AND PERSONS WHO RELY ON THIS PRODUCT FOR THEIR SAFETY COULD SUSTAIN SEVERE PERSONAL INJURY OR DEATH The warranties made by Mine Safety Appliances Company with respect to the product are voided if the product is not used and serviced in accordance with the instructions in this manual Please protect yourself and others by following them We encourage our customers to write or call regarding this equipment prior to use or for any additional information relative to use or repairs CAUTION For safety reasons this equipment must be operated by qualified personnel only Read and understand the instruction manual completely before operating In the U S to contact your nearest stocking location dial toll free 1 800 MSA 2222 To contact MSA International dial 1 412 967 3000 or 1 800 MSA 7777 This manual pertains to units with Serial Number prefix A MINE SAFETY APPLIANCES COMPANY 2004 All Rights Reserved Manufactured by MSA INSTRUMENT DIVISION P O Box 427 Pittsburgh Pennsylvania 15230 L Rev 2 815329 Table of Contents
11. SET button A WARNING When the TWA alarm sounds you may be exposed to a concentration of gas that is hazardous to your life and health 2 12 Chapter 2 Using the Watchman Multigas Monitor COMB O2 NEXT LOG IS X SKIP RECD ppm TOX ppm TOX ppm TOX See Figure 2 13 Data Tag Recording Select Page You must follow your company s work and safety procedures If you do not follow those procedures you could be seriously injured or killed COMB O2 Tag Data NO YES pem TOX ppm TOX ppm TOX Cote Figure 2 14 Data Tag Confirmation Page Data Tagging Watchman units with software version 3 3 and higher have Data Tagging capability The Data Tagging text number can help you identify a location or event in the datalog This data can then be retrieved via the Data Docking Module and MSALINK Software version 2 1 or higher P N 804679 If Data Tagging is active on your Watchman unit it f COMB O2 LN M MS Tag OK Change ppm TOX ppm TOX ppm TOX euros Figure 2 15 Data Tag Entry Page 2 13 Chapter 2 Using the Watchman Multigas Monitor can be accessed by pressing the PAGE button until the FIGURE 2 13 display appears The Log number nnn is for your reference only and does not appear in the data log Pressing the button directly under SKIP PAGE Button will advance the display to the next page Waiting approximately 12 seconds without pressi
12. Table of Contents Chapter 1 Safety and General Limitations 1 1 Certifications eh 1 1 Electromagnetic Interference llle 1 1 AX CAUTION 5i neue des ed dpt ewe Re Gee 1 2 General Limitations lesen 1 2 AC WARNING air su utet etie nh 1 2 A GAUTIONS Usa dus kalala riui Leser Dn nur 14 Chapter 2 Using the Watchman Multigas Monitor 2 1 Figure 2 1a Watchman Monitor Right Side View 2 1 Preparations iier td aaah nan ALENG KALA ELM T A ad 2 2 Turning ON the Watchman Multigas Monitor 2 2 Figure 2 1b Watchman Monitor Left Side View 2 2 Figure 2 2 Measure Power ON 0 0 aaa 2 2 Using the Watchman Multigas Monitor aa 2 3 Figure 2 3 Measure Please Wait aa 2 3 Exposure Display nana zii XAR aback ERR Re RA 2 4 Battery Condition een 2 4 Figure 2 4 Exposure Page eee eee eee 2 4 Figure 2 5 Battery Condition aaa 2 4 A WARNING 2 II 2 5 Figure 2 6 Time Display a 2 5 Time Display i scio SUL Ahm TE LERRA UL 2 6 Calibration Check m Ih 2 6 AVGAUTION 5 pure PESE MIS TUBIS 2 6 Measuring Gas Concentrations llle essel 2 7 Combustible Gases COMB 2 2 2 7 Figure 2 7 Combustible Gas Alarm Flag 2 7 A WARNING 2 II nn 2 8 A CAUTIONJAH i si ends aa Nakalaban Geeks Ben ERE 2 8 AX CAUTION 2 225005 Ives DEFUI 2
13. When sampling over liquids the end of the sampling line must not touch the surface of the liquid Otherwise liquids may enter the instrument causing internal damage In addition sample gas may be blocked from entering the line and a false reading may occur Obstruction of the sensor holes in the instrument flowblock could cause erroneous readings The inlet filter should screen out most obstructions but during service the small holes in the face of the flowblock should be checked These holes must be kept open at all times and may be carefully cleaned with a pin or similar small pointed object Do not use MSA Lead Inhibitor Filters with this instrument Loss of sensitivity may result Battery packs must be recharged in a non hazardous location free of combustible gases and vapors Acalibration check must be included as part of a routine inspection of this instrument to ensure it is operating properly and readings are accurate See the Watchman Multigas Monitor Technical Manual for calibration procedure details and calibration kit part numbers Use only genuine MSA replacement parts when performing any maintenance procedures described in this manual Substitution Chapter 1 Safety and General Limitations of components may seriously impair instrument performance alter intrinsic safety characteristics or void agency approvals Repair or alteration of the Watchman Monitor beyond the procedures described in this manual could cause
14. date of manufacture including those for Electromagnetic Interference Electromagnetic Interference This equipment has been type tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense This equipment was tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment OFF and ON the user is encourag
15. e time before valid samples and readings can be obtained Using Sampling Equipment If using a Watchman Multigas Monitor with a sampling pump or aspirator bulb assembly perform a blocked flow test before each day s use When performing the test the appropriate indication must occur when blocking the flow If the indication does not occur check the instrument flow system for leaks Once the leak condition is corrected perform the blocked flow test again to verify proper operation before using the instrument Refer to the applicable section in this instruction manual for additional information 1 Turn OFF the Watchman Monitor 2 Attach the sampling hose probes and line traps to the instrument gas inlet port 3 Turn ON the instrument and verify proper operation a Plug the free end of the sampling line or probe e The pump motor shuts down and an alarm sounds e The readings on the display may change A WARNING Perform a blocked flow test before each day s use Failure to perform a blocked flow test can result in the user being unaware of the presence of gas Do not use the instrument unless the blocked flow indications occur when performing the blocked flow test Lack of a blocked flow indication is a sign that a leak exists and the sample may not be drawn to the sensors which could cause a false reading Failure to follow the above can result in serious personal injury or death Periodically the pump will try
16. ed to try to correct the interference by one or more of the following measures e Reorient or relocate the receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help 1 1 Chapter 1 Safety and General Limitations This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the CRTC A CAUTION Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment General Limitations A WARNING The Watchman Monitor detects gases and vapors in air only It cannot measure combustible or toxic gases in reducing atmospheres furnace stacks environments with inert gas backgrounds Do not use the Watchman Monitor to measure combustible or toxic gases when the amount of oxygen is deficient enriched The Watchman Monitor measures combustible gases and vapors It cannot measure the presence of combustible airborne mists such as lubricating oils airborne dusts such as grain or coal dust The Watchman Monitor contains sensors which detect specific toxic gases The instrument must be used to detect only those specific gases Other tox
17. emperature range 50 ppm HCI Air 0 Nitrogen Dioxide Sensors 10 ppm HON Air 0 bag 10 ppm Hydrogen Sulfide 12 50 ppm NO Air 12 7 100 ppm Carbon 5 ppm NO air 0 Monoxide 9 10 ppm SO Air 2 5 ppm Chlorine 4 These responses are typical over the 50 ppm Hydrogen Chloride 1 entire 1000 to 40 C temperature range pp a f 10 ppm Hydrogen Cyanide 2 Hydrogen Sulfide Sensors 10 ppm Sulfur Dioxide 0 These responses are typical over the 1000 ppm Toluene Air 0 entire A076 to 409C temperature range 0 58 Benzene Air 0 m 1 6 Acetone Air 0 Sulfur Dioxide Sensors 100 ppm Isobutylene Air 0 10 ppm Hydrogen Sulfide 23 0 8 Hydrogen Air 4 100 ppm Carbon 0 0 75 Pentane Air 0 Monoxide 3 9 CO2 N2 0 5 ppm Chlorine 0 1 4996 Ethanol Air 2 10 ppm Hydrogen Cyanide 2 7 5 ppm Chlorine Air 0 50 ppm Nitrogen Dioxide 7 i These responses are typical over the 30 ppm CNA 9 entire 1000 to 40 C temperature range TO pp RU i d o NOTES These conversion factors are 50 ppm NO Air 1 typical for a Watchman Multigas Monitor Individual units may vary by 5 ppm NOy Air 0 25 from these values 10 ppm SO Air 1 These responses are typical over the entire 10 C to 40 C temperature range
18. hanged to meet specific conditions DATA DOCKING PORT DATA DOCKER LOCATING RIBS BUZZER PORT Ng BATTERY Bag CHARGE JACK BATTERY RETAINING SCREWS RIGHT SIDE PANEL RETAINING SCREWS 4 EACH Do Figure 2 1a Watchman Monitor Right Side View 2 1 Chapter 2 Using the Watchman Multigas Monitor DISPLAY REMOTE ALARM JACK RN PUSHBUTTON KEYS EC pa ALARM LIGHTS Dai HANDLE MOUNT GAS OUTLET GAS INLET LEFT SIDE PANEL RETAINING SCHEWS 4 EACH Figure 2 1b Watchman Monitor Left Side View Preparation COMB 02 MEASURE POWER ON ppm TOX ppm TOX ppm TOX m Figure 2 2 Measure Power ON Turning ON the Watchman Multigas Monitor 1 Charge instrument battery pack with Omega M Charger 2 Push the ON OFF button e The FIGURE 2 2 display flashes e The display backlight flashes e The alarm lights flash e The alarm sounds and stops 2 2 Chapter 2 Using the Watchman Multigas Monitor COMB 02 MEASURE PLEASE WAIT ppm TOX ppm TOX ppm TOX Figure 2 3 Measure Please Wait e The FIGURE 2 3 display appears If the Fresh Air Setup FAS feature is enabled the combustible and toxic sensors can be zeroed and the oxygen sensor can be spanned to 20 896 FAS must only be used in fresh air See Fresh Air Setup Option later in this Chapter for additiona
19. harge the battery pack If you do not follow this procedure you could be injured or killed COMB 02 15 00 1 SEPT 92 ppm TOX ppm TOX ppm TOX Figure 2 6 Time Display 2 5 Chapter 2 Using the Watchman Multigas Monitor Time Display Press the PAGE button In the third standard display page the time and date are displayed The time is displayed in a 24 hour format For example Sept 1 1992 3 p m would read as shown in FIGURE 2 6 If the time and date displayed are incorrect refer to the Watchman Technical Manual Chapter 1 Setup to reset the time and date Calibration Check A CAUTION The following calibration check must be performed before each day s use This calibration check is very simple and should only take one to five minutes depending on the number and type of gases your Watchman Monitor is equipped to sense Turn the Watchman Monitor ON in clean fresh air and verify that the readings indicate no gas present If necessary perform the procedure given in Fresh Air Setup Option later in this Chapter 1 Attach the Calibration Adapter Tubing to the instrument inlet port 2 Attach the regulator supplied with the Calibration Kit e g MSA P N 477150 to the cylinder 3 Connect the tubing supplied with the Calibration Kit to the regulator 4 Open the valve on the regulator and connect the other end of the tubing to the inlet fitting The flow rate of the regulator is 1 50 li
20. he RESET Button and down arrows LL appear above the PAGE Button e Pressing these buttons allows you to step through the characters Holding the button will cause the characters to rapidly scroll e Pressing the button under NEXT On Off enters the character and steps to the next character the character position which blinks can be changed You can remain on this display as long as necessary When the last character is entered the FIGURE 2 17 display appears If the button under OK PAGE button is pressed or if no button is pressed the text numbers are automatically entered into the datalog If the button under Change RESET is pressed the text numbers can be stepped through and changed again When the information you entered is written to the data log the FIGURE 2 18 display appears The text numbers will be entered chronologically in the datalog with the date and time stamp of when it was recorded You may press the PAGE button to move to the Exposure display Optional Sampling Equipment Sampling lines and related equipment permit samples of gas to be taken from remote or inaccessible locations 2 15 Chapter 2 Using the Watchman Multigas Monitor Sampling lines are 5 to 50 feet long and are made of a synthetic rubber specifically compounded to resist absorption of combustible and toxic vapors Gases are drawn through the lines to the Watchman Monitor by a pump Using the shortest possible line reduces th
21. hman Monitor maintenance Do not use the instrument for protection b When the Fresh Air Setup is completed e Instrument enters the Exposure display page and displays gas readings e Instrument is ready for use To Bypass The Fresh Air Set Up Press the PAGE NO button or wait five seconds e Display enters Exposure page e Display begins to show gas readings e The instrument is ready for use 2 18 Chapter 2 Using the Watchman Multigas Monitor If the sensors drift off of zero a few minutes after being turned ON allow the Watchman Monitor to warm up for 15 minutes then try the Fresh Air Setup again COMB 02 TO TURN OFF HOLD POWER FOR 5 SEC ppm TOX ppm TOX ppm TOX d Turning OFF the Watchman Monitor Push the ON OFF button and hold it for five seconds A countdown appears as shown in FIGURE 2 20 Battery Pack Removal Figure 2 20 Power Down 1 Tum the power OFF by pressing and holding the ON OFF button for five seconds e POWER OFF appears on the display 2 Remove the instrument handle by releasing the two knurled thumbscrews on the left and right sides 3 Remove the four screws securing the right side panel remove right side panel and flip top lid 4 Remove the battery pack retaining screw from below the charging jack cut out on the right side panel 5 Slide the battery pack out of the c case CKI 6 Disconnect the battery pack power cable 7 Re
22. ic hazards may be present the Watchman Monitor is not intended to detect these other hazards Certain materials such as silicone silicates lead containing compounds such as leaded gasoline tend to desensitize the combustible gas sensor thereby giving erroneously low readings Calibration checks must be made frequently if such materials are suspected to be present in the tested atmosphere If you do not recalibrate the instrument may give false readings and endanger life and health Chapter 1 Safety and General Limitations For best accuracy calibrate the instrument with any sample lines probes water filters in place and at the pressure and temperature of intended use Readings will be inaccurate if the Watchman Monitor is used to take samples that are at low atmospheric pressure below calibration pressure high atmospheric pressure above calibration pressure Combustible gases will burn or explode only when the fuel air mixture is within certain proportions The minimum concentration of a particular combustible gas in air which can be ignited is defined as the Lower Explosive Limit LEL In some references the term Lower Flammability Limit LFL is used Combustible gas readings with an OVER alarm in the display indicate an amount of gas which may be above the Lower Explosive Limit LEL or above 596 methane by volume Such readings are beyond the accurate range of the sensor See Chapter 4 for limits
23. ir Setup 0 aaa 2 18 To Bypass The Fresh Air Set Up aaa a 2 18 Figure 2 19 Fresh Air Set up l aaa 2 18 Turning OFF the Watchman Monitor a 2 19 Battery Pack Removal elles 2 19 Recharging Nickel Cadmium Ni Cd Battery Packs 2 19 Figure 2 20 Power Down aa 2 19 TOC 2 Table of Contents Figure 2 21 Ni Cd Charger 120V Version Shown 2 19 Chapter 3 General Maintenance s 3 1 A WARNING seil Rer Rl em red aaa 3 1 Cleaning and Routine Care eese 3 1 SIOLage as ep PUER ERES AA 3 1 Storage for Models with Nitric Oxide NO Sensors 3 1 A WARNING sssssss Rn 3 2 Shipment AL RET ELA BADA KP RG LGA PEEL Ah Cs 3 2 Chapter 4 Performance Specifications 4 1 Relative Responses to Combustible Gases 0 aa 4 2 Interference Gases Cross Sensitivity lille 4 3 Carbon Monoxide Sensors a 4 3 Hydrogen Sulfide Sensors eee eee eee 4 3 Nitric Oxide Sensors 1 0 0 cc eee 4 3 Nitrogen Dioxide Sensors ssseees esses 4 3 Sulfur Dioxide Sensors lise 4 3 TOC 3 Chapter 1 Safety and General Limitations Chapter 1 Safety and General Limitations Certifications Tests completed by MSA verify that the Watchman Multigas Monitor meets applicable industry and government standards as of
24. l information Using the Watchman Multigas Monitor The Watchman Monitor has three standard and three optional display pages You can move sequentially from one to the next by pressing the PAGE button You can return to the standard Exposure display page by waiting for 15 seconds or by pressing the ON OFF button from another page The three standard display pages are e Exposure display normal e Battery condition e Time and date The three optional display pages are e Peak readings e Short Term Exposure Limit STEL e Time Weighted Average TWA e Data Tagging If any of these optional display pages is enabled refer to Watchman Technical Manual TABLE 1 1 it will appear on your instrument in the order shown above NOTE The Watchman Monitor measures concentrations of gases no matter what display page is shown When an alarm condition is reached the alarm sounds automatically The measurements made by the 2 8 Chapter 2 Using the Watchman Multigas Monitor COMB 02 NNN XLEL NN N NNNN NNNN NNNN ppm TOX ppm TOX ppm TOX Figure 2 4 Exposure Page Watchman Monitor do NOT depend on a specific display page being shown Exposure Display COMB 02 BATTERY cccccce vv VOLTS ppm TOX ppm TOX ppm TOX Figure 2 5 Battery Condition In this normal display page numbers appear near the gas labels on the instrument s display panel FIGURE 2 4 Battery Condition To change from
25. n of gas that is dangerous to your life and health You must follow your company s work and safety procedures If you do not follow these procedures you could be seriously injured or killed Press the PAGE button to move to 2 11 Chapter 2 Using the Watchman Multigas Monitor Time Weighted Average TWA TWA is the average exposure to toxic gas since the TWA reading was reset As with the STEL the TWA alarm limits may be set by the user refer to the Technical Manual Chapter 1 The TWA reading may be reset using the following procedure e Turn the Watchman Monitor OFF for eight or more hours or e Press the PAGE button until the TWA screen appears e Press the RESET button the FIGURE 2 12 message appears Press the RESET YES button When the amount of gas detected by the Watchman Monitor is greater than the eight hour TWA limit e Alarm sounds e Alarm lights flash e On the Exposure display page the screen displays the TWA alarm flag The TWA alarm is calculated over an eight hour exposure Calculation examples are as follows e 1 hour exposure of 50 PPM 1 hour x 50 PPM 7 hours x O PPMjp5 ppm 8 hours e 4 hour exposure of 50 PPM 4 hour exposure of 100 PPM 4 hours x 50 PPM 4 hours x 100 PRM ppm 8 hours e 12 hour exposure of 100 PPM 12 hours x 100 PPM 459 PPM 8 hours NOTE The accumulated reading is always divided by eight hours To reset the alarm e Inthe TWA display press the RE
26. ng a button or pressing the ON OFF Button returns you to the Measure page COMB O2 TANK 123 Tag WI NEXT na ppm TOX ppm TOX ppm TOX euo e Figure 2 16 Sample Data Tag Entry Pressing the button directly under RECD RESET button allows you to record a line entry in the datalog The FIGURE 2 14 display now appears If the button under NO PAGE button is pressed or if no button is pressed for five seconds the previously entered Data Tag text numbers will be recorded in the datalog If the button under YES RESET button is pressed the FIGURE 2 15 display appears Pressing the button under OK PAGE button will record the previously entered Data Tag text numbers in the datalog If no button is pressed for five seconds the previously entered Data Tag text numbers will be recorded in the datalog COMB O2 TANK 123 Tag OK Change ppm TOX ppm TOX ppm TOX Se Figure 2 17 Data Tag Acceptance Page 2 14 Chapter 2 Using the Watchman Multigas Monitor Pressing the button under Change RESET button will allow you to change and record the text numbers up to 10 alpha numeric COMB 02 Now recording data log XX ppm TOX ppm TOX ppm TOX o Figure 2 18 characters Valid characters are numbers 0 to 9 capital letters A to Z the character the character and a period A typical entry may look like FIGURE 2 16 Up arrows TT appear above t
27. place the side panel and handle Recharging Nickel Cadmium Ni Cd Battery Packs The Watchman Ni Cd rechargeable battery packs are charged by using the Omega battery charging system only FIGURE 2 21 Look for the Omega symbol Q on the charger and the word Omega on the instrument or battery pack to make sure they are compatible Use of any other charger may damage or improperly charge the batteries Figure 2 21 Ni Cd Charger 120V Version Shown 2 19 Chapter 2 Using the Watchman Multigas Monitor The battery pack will be fully recharged after 16 hours The Watchman unit should be turned OFF or the battery pack should be removed from the Watchman unit during charging Be certain that the charger is properly connected by checking to see that the charger s LED is lit No matter how long the Watchman unit was run one hour or a full shift the battery pack can be left on charge indefinitely without causing damage providing that the battery pack is recharged at room temperature The Omega charger will recharge but not over charge the battery pack The Watchman Ni Cd battery pack will operate the instrument for at least 10 hours for the life of the batteries at any acceptable operating temperature Newer batteries at room temperature will operate the instrument for up to 15 hours or longer The battery pack may be charged when installed in or removed from the Watchman Monitor If battery pack is connected to
28. set with the RESET button The LockAlarm circuit locks the combustible gas reading and alarm if the gas reading exceeds 100 LEL or 5 methane e OVER appears on the display The alarm can be reset by moving to a safe fresh air environment and turning OFF the instrument 2 7 Chapter 2 Using the Watchman Multigas Monitor A WARNING When the OVER alarm condition is reached you are in a life threatening situation there is enough gas in the atmosphere for an explosion to occur You must 1 Leave the area immediately 2 Turn OFF the instrument and do not turn it ON again until the instrument is in fresh air If you do not follow this procedure you could be seriously injured or killed A CAUTION 1 Any Rapid up scale reading followed by a declining or erratic reading may indicate a gas concentration beyond upper scale limit which may be hazardous A CAUTION 2 High off scale readings indicated by OVER may indicate an explosive concentration Only the combustible gas detection portion of this instrument has been assessed for performance Oxygen Measurements The Watchman Monitor detects the amount of oxygen in the atmosphere There are two conditions which trigger the alarm e Too little oxygen deficient e Too much oxygen enriched COMB 02 NNN 4LEL 22 3 NNNN NNNN NNNN ppm TOX ppm TOX ppm TOX Figure 2 8 Oxygen Alarm Flag Chapter 2 Using the Watchman Multigas Monitor At
29. ters per minute lpm Note the readings on the Watchman display they should be within the limits stated on the calibration cylinder or limits determined by your company If necessary change cylinders to introduce other calibration gases If the readings are not within these limits the Watchman Monitor requires recalibration Return the instrument to your maintenance facility or refer to the Watchman Technical Manual Chapter 2 Calibration for detailed calibration instructions This calibration procedure applies to calibration gases available in cylinders For those calibration gases only available in ampoules refer to the Watchman Technical Manual Chapter 2 Calibration 2 6 Chapter 2 Using the Watchman Multigas Monitor Measuring Gas Concentrations Combustible Gases COMB COMB Oz 55 XLEL NN N NNNN NNNN NNNN ppm TOX ppm TOX ppm TOX Figure 2 7 Combustible Gas Alarm Flag The Watchman Monitor detects combustible gases in the atmosphere The Alarms sound when concentrations reach e Alarm setpoint or e 100 LEL Lower Explosive Limit or e 5 CH4 Methane by volume When the combustible gas indication reaches the Alarm Setpoint e Alarm sounds e Alarm lights flash FIGURE 2 7 e Press the RESET button to silence the alarm e Gas concentration flashes in the display When the combustible gas indication reaches 100 LEL or 5 CH4 of the combustible gas e Alarm sounds e This alarm cannot be re
30. the Watchman Monitor 1 Turn OFF the instrument 2 Insert the charger plug through the hole in the lower right side of the instrument into the jack on the battery pack 3 Plug the charger into a matching receptacle The red light on the charger lights if the charger is properly connected 2 20 Chapter 3 General Maintenance Chapter 3 General Maintenance As with all electronic equipment the Watchman Monitor will operate only if it is maintained properly A WARNING Repair or alteration of the Watchman Monitor beyond the scope of these instructions by anyone other than a person authorized by MSA may void all warranties and approvals Such repairs may also endanger persons who rely on this equipment for their safety or health When needed use only genuine MSA replacement parts Cleaning and Routine Care The keypad overlay of the Watchman Monitor should be cleaned periodically with a soft cloth dampened with water In addition the inlet filter should be checked on a regular basis for accumulation of dust or foreign contaminants Replace the filter if it is clogged Storage Store your Watchman Monitor in a safe dry place when it is not in use Be sure that the storage area temperature is between 23 and 104 F 5 and 40 C e When the Watchman Monitor is stored for more than one month rechargeable battery packs should be periodically charged to prevent battery damage Storage for Models with Nitric Oxide NO
31. the instrument to fail to perform properly FAILURE TO COMPLY WITH THE PRECEDING WARNINGS CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH A CAUTIONS When sampling with accessory sampling lines the shortest possible length should be used to minimize the time needed to obtain a valid reading Acid gases such as carbon dioxide will shorten the service life of the oxygen sensor Do not push on the center of the oxygen or the toxic gas sensor Be especially careful when installing or replacing a sensor Damage to the sensor may result This instrument is designed for use only with the battery chargers listed in this manual Use of other battery chargers may result in damage to the battery pack and instrument Dispose of used batteries in accordance with local health and safety regulations Chapter 2 Using the Watchman Multigas Monitor Chapter 2 Using the Watchman Multigas Monitor It is your responsibility to know how to use the Watchman Multigas Monitor FIGURES 2 1a and 2 1b When used properly the Watchman Monitor will alert you to the presence of combustible gases and vapors and to atmospheres that are rich or deficient in oxygen It will also alert you to the presence of specific toxic gases if it is equipped with sensors for those gases These conditions are simultaneously displayed clearly on the face of the instrument Alarm levels are set at the factory and meet most commonly accepted standards Setpoints can be c
32. tton to move to Peak readings This shows the highest levels of gas that the Watchman Monitor recorded since it was turned ON or since the peak readings were reset FIGURE 2 9 To reset the Peak Readings 1 When on the Peak display page press the RESET button The instrument will require you to verify that the peak readings should be reset FIGURE 2 10 COMB 02 NNN XLEL NN N STEL NNNN NNN ppm TOX ppm TOX ppm TOX Figure 2 11 STEL Alarm Flag 2 10 Chapter 2 Using the Watchman Multigas Monitor 2 Press the RESET YES button a second time to reset peak readings or press the PAGE NO button or wait 15 seconds to cancel After viewing or resetting the peaks press the PAGE button again to move to Short Term Exposure Limit STEL This display page shows the average exposure over a 15 minute period The Watchman Monitor is supplied with standard STEL settings for toxic gases These may be reset refer to Watchman Technical Manual Chapter 1 Setup When the amount of gas detected by the Watchman Monitor is greater than the STEL limit e On the Exposure display page the FIGURE 2 11 screen appears e Alarm sounds e Alarm lights flash To reset the alarm e Inthe STEL display press the RESET button COMB 02 RESET TWA no es ppm TOX ppm TOX ppm TOX Figure 2 12 Reset TWA Page A WARNING When the STEL alarm sounds you may be exposed to a concentratio
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