TWL-1S user manual
Contents
1. 2013 01 scarlet tech TM Table of Content E NWALFOUUCTION aasaisntdanninuseninutesnivenieemniaaniveienenaiannnasen imate E E S 1 Zs O 1 Be Geile Started ss 2 3 1 Meter SUDAR 2 3 2 ES A tude aasterea ne Und roost E LE N L A A aa 2 A O 2 2 1 CROW AAA 2 42 MOAS esse ee 2 AS WEL ls Dee RIEMEN DD 2 Ae BGG MIS BM as nee Ne N ai 2 45 ee 3 ADs O 3 2 2 SPAREN aan OA OS O IDAS A A OA nina 3 4 8 Battery E A A 3 5 DAL O ea 3 6 ROCA ON O A A A A A SOS 4 7 Bolypropylene Alter EOS 4 8 Example for a Construction Ste ass 4 DO PROUD SHOOUINE AE A EE E E E E ent 5 10 PEC CON das 6 CN Se ne ne ann 6 12 DSC 6 13 Acronym idas 6 TWL 1S is an environmental meter and should only be used as a reference Good judgment and care are required when making any decisions about safety and health Your TWL 1S Heat Stress Detector is designed to provide accurate measurement provided that you follow the instruction described in this manual Any improper uses might cause measurement error or damage to the device Prior to any measurement e Make sure your TWL 1S is in good condition and within factory calibration e Allow TWL 1S to acclimatize to the environment for 10 min if any significant changes in temperature and humidity occur e g when moving TWL 1S from indoors to outdoors Globe Bulb Temperature Humidity Wind Speed Power Backlight Mode Timer TWL Paging Y me m2. Sent back to repair Leave the meter in regular air temp for 30 min Leave the meter in regular air temp for 30 min Refer temp and RH error code to fix Sent back to repair Leave the meter in regular air temp for 30 min Leave the meter in regular air temp for 30 min Refer temp and RH error code to fix Leave the meter in regular air temp for 30 min Leave the meter in regular air temp for 30 min Refer temp and RH error code to fix 10 Specification Parameters Range Resolution Accuracy Globe Bulb 0 80 C 0 1 C Indoor 1 0 15 40 C 1 5 C others Temperature Outdoor 1 5 15 40 C 2 0 C others Air Temperature 0 50 C 0 1 C 0 6 C Humidity 5 95 0 1 3 25 C 10 90 RH 5 others Wind Speed 0 5 10 m s 0 1 m s 2 of reading 0 2 m s 11 Certification The TWL 1S Heat Stress Detector is certified by CE mark following the EN 61326 1 2006 Electrical Equipment for Measurement Control and Laboratory Use for its temperature and humidity sensors from SGS a globally renowned company for inspection verification testing and certification TWL 1S Heat Stress Detector has also received a third party certification SGS 12 Disclaimer This manual was written by Scarlet Tech Co Ltd for the use of TWL 1S Heat Stress Detector The product and its documentation including this manual are provided as is and without warranty of any kind either expressed or implied including but not
3. limited to the implied warranties of merchantability fitness for a particular purpose or non infringement In no event shall Scarlet Tech s total liability to you for all damages losses and cause of action exceed the amount paid for the product and its documentation 13 Acronym AD EHS RI CoP 11 0 Abu Dhabi Environment Health and Safety Regulatory Instrument Code of Practice 11 0 Safety in the Heat HAAD Health Authority Abu Dhabi EHS Health Safety and Environment EHSMS Environment Health and Safety Management System LCD Liquid Crystal Display TWL Thermal Work Limit Designed by Scarlet Tech Co Ltd www scarlet com tw scarlet tech Scarlet Tech is a trademark used by Scarlet Tech Co Ltd in Taiwan and other countries This manual and the product described in it are copyrighted with all rights reserved Copyright 2012 by Scarlet Tech Co Ltd
4. mente as 9000 1000 a Y a E o a B gt a F Quick guide 0 80 C w resolution 0 1 C 0 50 C w resolution 0 1 C 5 95 w resolution 0 1 0 5 10 m s w resolution 0 1 m s Long press to turn power on off Turn on colorful backlight 115 lt TWL lt 140 red Toggle among 7 modes Long press to turn the timer on off min 5 EN Calculate TWL TWL lt 115 Emit radio signal to pagers TWL value is based on 120 sec average values of dry bulb globe bulb humidity and wind speed Display Anatomy Mode Banner Toggle among 7 modes by Mode key Mode correspondent units TWL wno Hum weer SU NN A W m L LI Timer Banner Count down 2 min during TWL calculation Count down based on risk level Change countdown timer by Timer key amp High Mea Low NES UNES UNES Work Zone Indicator TWL dependent risk level Colorful signal for risk by Backlight key gt Battery Indicator Change batteries when the sign is empty U 1 Introduction Heat illness can be vital However with proper precautions it can be avoided Thermal Work Limit TWL is a heat index calculated from environmental parameters including dry bulb temperature wet bulb temperature globe bulb temperature and wind speed and accommodates for clothing factors as well as human physiological status to estimate a safe maximum continuous suitable metabolic rate It is des
5. proper orientation e The pager beeps once when it is ready 4 Instruction For explanatory purpose all icons are presented in Display Anatomy page iv However during daily operation only part of these icons is displayed 4 1 Power Long press Power key to turn on or off the device e When left without any operation for 15 min the device turns off automatically 4 2 Mode e Press Mode key to toggle among 7 modes e It shows real time value for 6 modes Dry Bulb Wet Bulb Globe Bulb Wind Speed Humidity WBGT e TWL value is not real time Calculation is only triggered by pressing TWL key tw 4 3 TWL e Before any calculation the TWL mode shows w m e Press TWL key TWL to calculate a TWL value e It takes 2 min to compute a TWL value because 2 min average is more representative than a snapshot e When calculating a TWL value the screen shows average wind speed from the 1 second to current moment e When calculating TWL icon blinks and a countdown timer shows the time remains e When the calculation is done a TWL value and correspondent risk icon shows alone with the suggested work time as indicated in Table 1 4 4 Backlight Press Backlight key 2 to turn on the colorful backlight of the LCD Quick Guide page iii The color corresponds with the TWL range and risk Table 1 e Before any TWL value is calculated pressing Backlight key only flashes twice 4 5 Timer e Short
6. agree to enter the data logging mode e When the screen shows rEC the device is collecting and recording data Idle means no data are recorded e Long press Timer key amp to quit data logging mode Step3 Download data e Connect to the computer to download the data via the PC side software you installed in the Configuration session Important lt Be sure to download the data before entering next data logging mode otherwise the data will be overwritten lt gt Do not leave the meter uncharged for too long otherwise the data might be lost 6 Recalibration Calibration drift happens over time Regular recalibration is necessary to ensure the accuracy of the measurement Humidity sensors can be recalibrated using the RH calibration kit which includes saturated salt solutions and two sealed containers We suggest that you have the humidity sensor calibrated every 6 months Please contact the sales representatives for RH calibration kit instruction and services Temperature sensors dry air and globe bulb typically do not require recalibration because the calibration drift is negligible during the product lifetime Wind speed is calibrated against an intermediary standard calibrated under MEASNET cup anemometer calibration procedure before it leaves the factory However we recommend that you have the anemometer checked every 6 month Please contact the sales representatives for wind speed test and bearing replacemen
7. can turn on the TWL 1S again and press TWL key TWL to calculate a new TWL value 9 Trouble Shooting First ensure the batteries are properly inserted If any error code shows on the LCD please check Table 2 for solutions Table 2 Error codes and solutions Error code Defect DRY Dry Bulb Temperature E02 Measured air temp is lower than specified range E03 Measured air temp is higher than specified range E31 Circuit AD defect GLB Globe Bulb Temperature E02 Measured temp is lower than specified range E03 Measured temp is higher than specified range E31 Circuit AD defect HUM Humidity E04 Temp error causes this defect ELT Humidity calibration error E33 Humidity circuit error WET Wet Bulb Temperature E02 WET is lower than specified range E03 WET is higher than specified range E04 Caused by DRY or HUM error WND Wind Speed E31 Hardware defect WBGT E02 WBGT is lower than specified range E03 WBGT is higher than specified range E04 Caused by DRY GLB HUM error TWL E02 TWL is lower than specified range E03 TWL is higher than specified range E04 Caused by DRY GLB HUM WND error Solution Leave the meter in regular air temp for 30 min Leave the meter in regular air temp for 30 min Sent back to repair Leave the meter in regular air temp for 30 min Leave the meter in regular air temp for 30 min Sent back to repair Refer temp error code to fix Re calibration correctly
8. igned primarily for self paced workers who are well hydrated and acclimatized in the working condition Table 1 Thermal Work Limit TWL zones and management intervention TWL W m Backlight Work Time Risk Level TWL gt 140 Green min Low Risk 115 lt TWL lt 140 Yellow min Medium Risk TWL lt 115 Red 20 min High Risk safe for all continuous self paced work TWL 1S Heat Stress Detector offers a compactly designed hardware with deliberate software and user friendly interface e TWL dependent backlight informs users the risk level e Work timer reminds users the work rest schedule and actively notifies the remote pager when it counts down to zero 2 Package e TWL 1S Heat Stress Detector x1 e Certificate of Conformity x1 e User manual x1 e Data logger USB cable x1 e Tripod x1 AAA battery x4 e Pager x1 e AA battery x1 3 Getting Started 3 1 Meter Setup e Insert 4 AAA batteries into the battery holder with proper orientation Long press Power key to turn on TWL 1S Heat Stress Detector e Place the meter on a tripod preferably 1 m above the ground for proper placement lt gt Expose the meter to the environment for 10 min for equilibrium for any significant changes in temperature and humidity e g indoor to outdoor and vice versa e Press Mode key to toggle among 7 modes e Press TWL key TWL to calculate a TWL value 3 2 Pager Setup e Insert 1 AA battery into the battery holder with
9. pressing Timer key y sets the timer Long pressing Timer key y starts ends the timer e This key only works in High Risk Red zone as green and yellow zones do not have work time limits 4 6 Paging e Press Paging key A to call the remote pagers e Paging signal covers 200 meters on average but the range may vary with topology 4 7 Pager e When triggered by TWL 1S the pager beeps and vibrates e Press the side button right figure dashed circle to stop e Both red zone and the expiration of work timer trigger the pager 3 times with 1min interval 4 8 Battery e Alkaline batteries can sustain more than 120 hours when operated continuously e Dry batteries and rechargeable batteries are also applicable but with shorter lifetime e Download data when the battery bar is empty 07 otherwise some data might be lost OSOS Dr m EIA y 5 Data Logging Step1 Configuration e Download software TWLIT from Scarlet website www scarlet com tw and install the software on a PC laptop e Turn on TWL 1S detector and connect TWL 1S to the PC laptop by a USB cable e Launch the software and set sampling rate minimum 10 min e Disconnect the meter from the computer and TWL 1s is ready for data logging Step2 Data logging e Long press Mode key to turn on data logging mode and the meter displays SUTE e Press Mode key if you agree to enter the data logging mode e Press Timer key amp if you do NOT
10. t 7 Polypropylene Filter A polypropylene PP fiber is applied to protect the temperature and humidity sensors from dust while allowing water vapor moist humid air to pass through It is suggested to replace the PP filter every 2 6 months depending on the usage condition Please contact the sales representatives if you wish to change the filter 8 Example for a Construction Site At a construction site environmental characteristics are significantly different at different locations For example direct sunlight and strong wind might occur at a rooftop while ventilation is limited at a basement It is suggested to deploy TWL 1S Heat Stress Detectors at different spots to reflect actual situation Once the TWL 1S Heat Stress Detector is turned on and set up per the instruction mentioned in Section the meter is ready for measuring the environmental parameters and computing a TWL value Users can operate TWL 1S with the function keys described in Section 4 Based on the calculated TWL value the TWL 1S Heat Stress Detector automatically sets up the work timer as suggested in Table 1 If the TWL value is in the Red Zone TWL 1S will automatically send a warning signal to notify a supervisor through a pager 3 times with 1 min interval The supervisor can set and start the work timer When the timer counts down to zero the pager beeps and vibrates notifying the supervisor to announce an intermission Once the intermission is due the supervisor
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