3M WIBGET WB-300 Portable Heat Stress Monitor User Manual
Contents
1. The year of manufacture is determined by the third character in the instrument s serial number was manufactured in 2001 B in 2002 C in 2003 D in 2004 and so forth 8 Appendix B Heat Exposures Tables Appendix B Appendix B Heat Exposures Tables ACGIH Screening Criteria for Heat Stress Exposure WBGT values in C NOTE according to the ACGIH s guidelines the temperature values represent a work and rest process which is explained in the standards Please refer to the ACGIH TLV s and BEls for specific details Work and recovery Light Moderate Heavy Very Heavy TLV 25 to 50 32 0 30 0 29 0 28 0 Work and recovery Light Moderate Heavy Very Heavy Action Limit Values not specified by ACGIH have been estimated for continuity Cited from American Conference of Governmental Industrial Hygienists Threshold Limit Values and Biological Exposure Indices for 2008 Reprinted with permission from ACGIH 9 PHEL Curves tes Hours Minu IV Ime in PHEL Curves Total Exposure T A 2 2 e 9 10 Product Information Product Information WIBGET WB 300 Heat Stress Monitor kit includes 9V alkaline battery replacement wicks water bottle verification module storage case and user manual 3M ID 70 07160781 9 Accessories 053 923 Verification module 70 0715 8124 6 056 068 2 oz water bottle 70 0715 8371 3 warranty 3M WI2. scusate dut dde bap ee uode qu Mus RN UEM MEME ge PUE 9 sc T dc crc 9 Charge Time NIMA Battery Pack coin ceps titer dn rosae atre pmi ergab 9 Safety Approvals and Special Conditions sss 9 Appendix B Heat Exposures Tables seen 10 eect eset EAA RO dle nee UNDER NOR 10 PHEL Curves Total Exposure Time in Hours 11 Prodac i MMO RMN 12 NE ANNAA A EE NATI eee eee ee ee 12 uci PY 12 Contaci Service neo PNE TE 12 12 Figures Figure Wet bulb and Maintenant ac br Esa magos d d 4 Figure 2 Keypad keys identified nennen 9 aues cq qom cence iecuasveaadcecuetatanceadesac asleep ua bis aa aE Rae NARESE a 6 Figure 4 Data measurement screen examples sse 7 Figure 5 NIMA Battery PEOR pecs 9 1 Up and Running Up amp Running Up and Running 1 Ensure the wet bulb s wick is clean Then fill the reservoir with distilled water 2 Place the WB 300 in the work area in a safe location approximately 3 5 feet off the ground 3 Turn the instrument On by pressing I O Enter key Ifthe battery voltage displayed during the power on sequence is less than or e
3. 0253 02 W 70 St Paul MN 55144 1000 3M WIBGET W Occupational Health amp Environmental Safety Division 3M Center Building 0235 02 W 70 St Paul MN 55144 1000 3M com detection Technical Service 1 800 243 4630 Customer Service 1 800 328 1667 3M com OccSafety B 300 Please recycle Printed in U S A 3M and WIBGET are trademarks of 3M Used under license in Canada 2011 3M Company All rights reserved 34 8706 7556 7
4. thermometer gives an indication of the radiant heat exposure on an individual due to either direct light or hot objects in the environment This is accomplished by placing a temperature sensor inside a blackened copper sphere and measuring the temperature rise The WBGT index is based on the response of a 6 inch diameter globe The WB 300 uses a 2 inch diameter globe for a faster response time The temperature of the 2 inch globe is correlated to match that of a 6 inch globe As an option a sensor array with a 6 inch diameter globe is available As an option a sensor array with a 6 inch diameter globe is available Dry Bulb Thermometer The dry bulb thermometer measures the ambient air temperature This measurement is used in the outdoor WBGT calculation when a high solar radiant heat load may be present The series of white plates surrounding the sensor shield it from radiant heat ji A Globe thermometer B Natural wet bulb thermometer C Dry bulb thermometer Figure 3 Sensors identified 4 Measurements Measurements Measurements The WB 300 portable heat stress monitor computes the Wet Bulb Globe Temperature WBGT The WBGT is an accepted measurement for determining the heat stress level imposed on an individual in a given environment The WB 300 measures three parameters Ambient or dry bulb temperature DB Natural wet bulb temperature WB Globe temperature C Wet Bulb Globe Temperature The WBGT is a weig
5. up position is for the 9 volt battery The down position allows for either the AC adapter or the rechargeable batteries The AC adapter will trickle charge the rechargeable batteries if they are in place or it will simply allow for line power operation of the unit 9 V Alkaline Battery Replacement The 9 volt battery should be replaced or the NiMH battery pack should be recharged when the voltage drops below 6 4 volts The battery voltage is displayed when the instrument is turned on While turned on the battery voltage can be displayed at any time by pressing the up or down arrow keys to move through the display until the battery voltage screen appears If while operating the battery voltage drops below 6 4 volts the display will automatically switch to the display showing the battery voltage along with a low battery message After a low battery occurs the unit will continue to operate for approximately 8 hours When the battery voltage falls to 6 2 volts or below the unit will automatically turn off NiMH Battery Pack The NiMH rechargeable battery pack is charged in the instrument using 120VAC to 9VDC adapter A discharged battery pack requires a charge of 16 hours Leaving the AC adapter plugged in for extended lengths of time or when operating the instrument will not harm the rechargeable batteries NiMH Battery Pack o install slide into case and plug in connector as shown Figure 5 NiMH Battery Pack 7 Appendix A Specifica
6. 3M Occupational Health and Environmental Safety Division 3M WIBGET Heat Stress Monitor WB 300 WIBGET WB 300 User Manual a Y WB 300 WIBGET i Dangers warnings and cautions 3M WIBGET Heat Stress Monitor WB 300 User Manual angers warnings and cautions Danger A Failure to observe the following procedures may result in serious personal injury This instrument is not intrinsically safe do not use in hazardous locations Warning Failure to observe the following procedures could damage the instrument Read the manual before operation Do not store in temperatures exceeding 100 C 212 F Do not immerse in liquids Condensation may damage your instrument Substitution of components may impair the accuracy of the instrument Repair should be completed by authorized service personnel only Caution General Replacement of 9 V alkaline battery only in a non hazardous locations A If recharging with a NiHM Battery pack recharge only in a non hazardous environment non condensing environment is required for proper measurements Do not charge battery outside the range of 0 C to 40 C 32 F to 104 Battery run time may be reduced when operating at lower than 0 C 32 F temperatures Intended Use The WIBGET WB 300 is intended to measure environmental temperatures for heat stress analysis Consult your company s safety professional for local standards or ca
7. BGET WB 300 LIMITED WARRANTY 3M warrants the WIBGET WB 300 will be free from defective materials and workmanship for one year from date of purchase indicated on the sales receipt provided it is maintained and used in accordance with 3M instructions and or recommendations If any component becomes defective during the warranty period it will be replaced or repaired free of charge This warranty does not apply to units that have been altered or had repair attempted or that have been subjected to abuse accidental or otherwise The above warranty is in lieu of all other express warranties obligations or liabilities THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE ARE LIMITED TO one year FROM THE PURCHASE DATE 3M shall not be liable for any other warranty express or implied arising out of or related to the appropriate use of environmental temperature measurement data for heat stress related issues Manufacturer or its agent s liability shall be limited to replacement or repair as set forth above Buyer s sole and exclusive remedies are return of the goods and repayment of the price or repair and replacement of defective goods or parts Contact Service information In United States contact Website 3M com Detection Technical Assistance 1 800 243 4630 For other 3M products 1 800 3M HELPS Or 1 651 737 6501 2011 3M Company 3M Occupational Health and Environmental Safety Division 3M Center Building
8. hted average of the three temperature sensors using the following formulas WBGT indoor 0 7 WB 0 36 denoted as WBGTI on the display WBGT outdoor 0 7WB 0 2G 0 1DB denoted as WBGTo on the display NOTE The resulting WBGTi WBGTo can be compared to indices of work rest regimens or stay times based upon the work loads Please see Appendix B for published heat exposure tables Displayed Data When powered on the previously viewed measurement screen will be displayed To view data screens press the or kevs Data Screens The following four screens are viewable by pressing the Q o keys on the WB 300 GLOBE Du d F Wet Dry Measurement screen Globe Measurement screen WEBGTi oo 6 F WBGTo WBGTi WBGTo Measurement screen Battery screen Figure 4 Data measurement screen examples 5 Setup Setup Setup While powered on press the setup key to change the temperature units F C or the language settings English Spanish French Italian or German if desired Placing the WB 300 on site for monitoring testing The WB 300 should be placed at a height of 3 5 feet 1 1m for standing individuals or 2 feet 6m for seated individuals Tripod mounting is recommended to get the unit away from anything that might block radiant heat or airflow A 1 4 x20 threaded bushing on the bottom of the instrument allows mounting to a standard photographic tripod Do not stand close to the unit dur
9. ing sampling Make sure that the wet bulb reservoir is filled with distilled water and that the cotton wick is clean and fully wetted After adding water or placing the unit in a new environment allow ten minutes for the globe and wet bulb readings to stabilize A series of dashes appear in the display if one of the following occur The temperature is outside of its allowable range A temperature sensor has failed Operational Check A verification module 3M ID 70071581246 may be used to check the operation of the WB 300 Remove the top sensor bar and plug the verification module into the top of the unit With the WB 300 set to read in degrees Celsius verify that the displayed readings match those printed on the module within 0 5 C If the readings are not within the 0 5 C tolerance then have the unit serviced and calibrated 6 Power Options Power Options Power Options There are 3 options for powering the WB 300 a 9 volt alkaline battery a NiMH Nickel Metal Hydride rechargeable 6 cell battery pack and an AC adapter A door on the back of the instru ment allows the user access to the 9 volt battery The rechargeable battery pack is located inside of the unit If the rechargeable battery pack ever needs to be replaced it can be accessed by removing the screws from the bottom panel of the unit The 2 position switch located in the battery compartment must be set by the user if the power supply method is changed The
10. ll 3M at 1 800 243 4630 ii Table of Contents Table of Contents HD eivai 9 Check wick and fill natural wet meae metiri een 3 Keypad ON RIEN ERIT innse E eniinn Eaki SENN EENE EKNER AE EEN SEERNE AEREE RESER 4 STE OES EAEAP E E E EE E E 5 Natural Wet Bulb Thermometer sssrinin 5 Globe Thermometer sse nnn nnn nnne tnnt tinis 5 DEE Te aE EE E NATEN I I NAA HERI IRURE ERA ERR 9 T 6 Wet Bulb Globe Teiriperalul 8 ocior rte RE rere PER DR eU 6 Blo B rz rz o MEE I 6 S cU o enn ER TR NN RS E rcm 7 Placing the WB 300 on site for monitoring testing ssssnnnnee 7 Oe ely heii lc A ee ee oe eee eT en ne eae eee ae 8 Power Options MR NOE 8 9 V Alkaline Battery Replacement ccsscsesssesssssssssssssessssecsserssssesssessrsesasscsesesaserensneess 8 NIMED aey 8 Appendix A SPECI CAM ONS 9 Miles cU TS Mgr TO 9 WAC AQ OS usur pa taancanuneueatsainentactesembnratine IE EAEE EEE EEA 9 plc 9 vu e H W O 9 ron t E T 9 TSO NIS 9 lect MTM C 9 Operating Temperature etc ek accov ki ik ruta n ludi 9
11. own while a count down 3 2 1 occurs in the lower left hand corner of the display Enter setup changes While in Setup screen press to enter or select setup changes The o key allows changing the setup parameters Two parameters are available Celsius or Fahrenheit and language selection Setup Press setup to access the parameters Use the arrow keys to switch between the two parameters Press the enter key to change the parameters Press setup again to exit The o key changes which items appear on the display Scrolls up Down Arrow The key changes which items appear on the display Scrolls down Figure 2 Keypad keys identified 3 Sensors Sensors Sensors Natural Wet Bulb Thermometer The natural wet bulb thermometer gives an indication of the effects of humidity on an individual Relative humidity and air flow are taken into account by measuring the amount of evaporative cooling taking place at a thermometer covered with a moistened wick The WB 300 uses a cotton wick immersed into a reservoir containing distilled water Ordinary tap water should not be used as the contaminants that are left behind after evaporation will shorten the life of the wick and cause high readings If the wick is discolored it should be replaced To replace the wick slide the old wick off the top of the sensor Place a new wick over the sensor making sure that the bottom of the wick is down in the reservoir Globe Thermometer The globe
12. qual to 6 4 volts replace or recharge the batteries 4 Using the Arrow keys select the desired measurement parameter screen 5 Allow 10 minutes for the sensors to stabilize to the environment before taking readings Check wick and fill natural wet bulb The WB 300 uses a cotton wick immersed into a reservoir containing distilled water Ordinary tap water should not be used as the contaminants that are left behind after evaporation will shorten the life of the wick and cause high readings If the wick is discolored it should be replaced To replace the wick slide the old wick off the top of the sensor Place a new wick over the sensor making sure that the bottom of the wick is down in the reservoir Filling wet bulb reservoir Remove reservoir cover and fill with distilled or de ionized water 2 Replace reservoir cover ze qmm lt Reservoir cover Reservoir Figure 1 Wet bulb and maintenance 2 Keypad Operation Keypad Keypad Operation The unit operates using a membrane keypad with 4 keys The key responds when the key is released while all other keys respond when the key is pressed Explanation Enter Setup The e key is used to turn on and off the instrument and to enter setup changes Turning on Press and release the I O enter key to power on The Instrument name WIBGET revision number and battery information appears during start up Turning off Hold the I O key d
13. tions Specifications Appendix A Specifications Measurements Globe dry bulb wet bulb WBGTi WBGT indoor and WBGTo WBGT outdoor Temperatures given in Celsius or Fahrenheit Languages English French Spanish Italian German Housing Designed water resistant to a light rain or mist If rain is frequent best practice would be to remote the sensor bar and keep the instrument sheltered Note when top sensor bar is removed an optional cable can be attached to measure remotely Size Height 9 2in 23 5cm Width 7 2in 18 3mm Depth 3 0in 7 5mm Dimensions include mounted sensor assembly Weight 2 6 105 1 2 kg with mounted sensor assembly Sensor Types Temperature 1000 ohm platinum RTD Accuracy Temperature 0 5 C between 0 C to 100 C 0 9 F between 32 F to 212 F Operating Temperature Range Sensor Assembly to 100 C ld to 212 F Electronics 5 C to 60 C 23 F to 140 F Power Options 9V alkaline 7 2V NiMH rechargeable pack charged in the unit or AC adapter wall power cube AC adapter will power the unit or recharge the NiMH battery pack Battery Life 9V alkaline 140 hours Rechargeable Nickel Metal Hydride 300 hours Charge Time NiMH Battery Pack 16 hours charge in the unit Safety Approvals and Special Conditions mar Compliance with Essential Health and Safety Requirements has been assured by compliance with EN 50014 1997 and EN 50020 2002
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