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Workers exposed to hot working environments can be susceptible to heat stress, when the core body temperature rises to dangerous or hazardous
levels. This can result in physiological symptoms like heat cramps, nausea,
palpitations, stroke and possibly death. An overall estimation of the heat stress levels on a body can be measured using the Wet Bulb Globe temperature (WBGT) Index. This combines the results from three temperature sensors into a single calculated value that may be compared with reference values depending upon the specific work regime.
Kit Includes:
Microtherm monitor with 3 sensor temperature probe
Pack of 5 spare wicks for wet themometer sensor
Plastic bottle for distilled water storage
Download cable to pc
Heat stress pc software for viewing measurements
4 x AA size rechargable NiCad batteries
Worldwide power supply and charger unit for battery pack
Operator manual
Features:
Large LCD screen
Real time display of changing levels
Data-logging as standard
Low water level alarm
Audible & visual warning of level excedances
RH% and dew point calculation
Windows PC software for setup and download of results from memory
Automatic calculation of work/rest regimes with included PC software
Tripod mounting for extended surveys
Meets the requirements of ISO 7243
Applications:
Power stations
Foundries
Steel works
Bakeries
Glass manufacturing
Routine monitoring
Medical surveillance testing
Spec Summary:
Measurement
Sensing technique:
Ta, Dry bulb, air:
Tg, Globe:
Tnw, Natural wet:
Resolution:
Platinum resistance
temperature detectors (PRTD)
100 elements 0.1% using 4 wire cable up to 30 ft (10m)
Measuring range: 50 140 °F (10 60 °C), accuracy ± 2.0 °F (1.0
°C)
Measuring range: 68 248 °F (20 120 °C), accuracy ± 2.0 °F (1.0
°C)
Measuring range: 41 104 °F (5 40 °C), accuracy ± 1.0 °F (0.5
°C)
0.1% for temperature and relative humidity
Power
supply
Battery pack:
Battery life:
External supply:
4 x AA MN1500 cells,
Alkaline or rechargeable NiCad
20 hours NiCad cells, 85 hours Alkaline cells
100 240 VAC Universal transformer with intelligent internal NiCad fast
charger circuitry
Physical
Display:
Keypad:
Weight:
Dimensions:
128 x 64 pixel LCD graphics
screen with backlight
7 key tactile membrane
26.5 oz (750 gm) instrument only
10.0" x 3.7" x 2.0" (245 x 95 50 mm)
Displayed
and stored
values
Wet Bulb Globe Temperature
Indoors & Outdoors
Wet Bulb Globe Temperature Indoors & Outdoors TWA
Ta, dry bulb, air
Tg, globe
Tnw, natural wet
Dew point
Relative humidity %
Additional
stored values
WBGT Indoor & Outdoor
maximum, minimum and average values
WBGT Indoor & Outdoor TWA maximum, minimum values
Ta, dry bulb, air maximum, minimum
and average values
Tg, globe maximum, minimum values
Tnw, natural wet maximum, minimum and average values
Data
logger
Internal memory:
Logging interval:
Recording method:
Analog output:
512kb memory providing up to
49,100 data records
30, 60 sec, 1, 2, 3, 4, 5, 6, 10, 15, 20, 30, 60 minutes
Record and stop when memory full or overwrite oldest results
0 2.5 V DC FSD, 500Ω output impedance
PC
Software
Operating system:
MS Windows 95/98, NT, 2000
compatible 32 bit package
RS232 serial port, 8 Mb RAM, FDD & HDD, VGA graphics card
Casella Microtherm Heat Stress Monitor Kit
