Date post: | 09-Aug-2015 |
Category: |
Environment |
Upload: | scarlettech |
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Made heat stress management easyHeat Stress Monitor
TWL 1 s
Scarlet Tech
Designing portable instruments
Founded in 2011, Taipei, Taiwan
scarlet.com.tw
Connecting to international academy
Fusing medical knowledge and technology taste
Coordinate local manufactures to implement the design
TWL 1 sMeasure Environment
Calculate Heat Index&
Measure Environment
Web bulb temperature (Tw)
Air temperature (Ta)
Globe temperature (Tg)
Wind speed (WS)
Sample parameters
TEMP FELTTEMP
WBGT TWL
Calculate Heat IndexGive scientific-based index
Mandatory
© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712
4 Sensors
GLOBE RH%
TEMP WIND
Globe TemperatureSmall 3” black ball, for portable
Range 0...80℃Accuracy ±1.0℃ (15...40℃)
Built-in correction factor for standard 6”
Reach 90% equilibrium in 7 min
Relative HumidityCapacitive sensor, small and responsive
Range 5...95%rh
Accuracy ±3% @ (10...90 %rh) 25℃
Capacitive sensor 140pF±40pF
Responsive. Took 12 sec from 10% to 80%
Air TemperatureSmall size, industrial spec
Range 0...60℃Accuracy ±0.6℃
NTC type thermistor
Beneath globe. Prevent from radiation heat
Wind SpeedWind cup. No worries about wind direction
Range 0.5...10 m/s
Accuracy ±(2% reading + 0.2) m/s
Wind tunnel lab calibrated
Optical method (IR) to read out RPM
indoor
4 Calculations
WETBULB WBGT
WBGToutdoor
TWL
indoorWBGT
WBGToutdoor
WBGT
The US Army proposed WBGT in 1957
Comply with ISO 7243, ACGIH TLV, ISO 7730
WBGT indoor = 0.7 x Tw + 0.3 x Tg
Wet Bulb Globe Temperature
WBGT outdoor = 0.7 x Tw + 0.2 x Tg + 0.1 Ta
everything in one deviceBest solution
four sensors
wet bulb measure RH: 5-95% accuracy 0.1%
calculator
globe 0-80℃, accuracy 0.1℃
Wind 0.5-10 m/s, accuracy 0.1 m/s
Dry bulb 0-50℃, accuracy 0.1℃
© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712
tableZone Risk Level Cycle (min)
TWL ≥ 140 Low Continuous*
115 ≤ TWL < 140 Medium Continuous*
TWL < 115 High 20 work - 40 rest
dashboardBest solution
© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712
3-color LCD backlight R/Y/G indicates risk levelRisk icons is readable alternative in sunlightOn screen timer is helpful for safety manager to schedule work-rest cycle based on TWL value
innovative display
data loggerBest solution
© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712
logger TWLIT
For research purposeFor build up database of forecastConfigurable sample rate: 10 min to 4 hr/dataStandard mini USB connector
PC software to download data and setup device Download data in zero click. SimpleConfigure device nameConfigure sampling rateExport CSV for Excel analysis
210
255
300
12.06 12:36 13:06 13:36
TWL RH (normalized)
sensor protectionBest solution
© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712
protect rh sensor
Polypropylene (PP) film allows vapor going through but blocks fine dust and dirt. So vapor and moisture reach sensor but particles don’t. This design is to extend the life of sensor in harsh environment.
Protect anemometer bearing
A silicone pad clamped on top of the plate of wind miller plate. This prevents the bearing inside of the structure from dust and other particles.Compare to competitors, this effectively extends the sensor life.
calibration & partsServices
© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712
humidity wind cup
>> Calibration Should calibrate every 6 months. Local agent or clients can do it.
>> PartsPp filter is suggested to be replaced every 2 to 4 weeks in heavy usage. By order.
Dry/globe bulb
>> Calibration Calibration drift of thermistors are negligible. No need to calibrate.
>> PartsBlack ball along with thermistor is replaceable. By order.
>> Calibration Local calibration is not feasible due to wind tunnel costs.
>> Quick checkHold device and walk 5 meters in 10 sec and make sure the cups keep rotating.
>> PartsWind cup and bearing is replaceable. By order.
Free PC Software
Portability is Considered
EN 61326-1:2006(IEC/EN61000-4-2 (2009)/
-3 (2006 + A2:2010)) Electrical Equipment for
Measurement, Control and Laboratory Use
Certification
Middle East includes Abu Dhabi, Dubai, Oman, Iran, KSA. Australia and New Zealand
Region Industry
Construction, oil and gas, open-cut mining, aluminum ,glass, forest management, cement, transportation, government
Our Customers
Brand
Our Customers
Customer VisitingWe visited 100+ companies in 18 months
ConstructionReach 50 °C in summer.
Risk assessment is mandatory and essential
Abu Dhabi Municipality
Safety in the heat conference. Scarlet was invited and had a
booth
Plastic PlantIntroduction and training
Dubai, UAEWorld Expo 2020
Introduction and training
Road ConstructionIntroduction and training
Mall Beside F1 Track
Cement Plant
Metal Manufacture
Cable FactoryReach 60 °C @ 2 meter. Heat risk assessment is
mandatory
ImprovementValidation
Increase ventilation in the site