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CEL180000 Microtherm Heat Stress monitor

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Microtherm Heat Stress monitor.Workers exposed to hot working environments can be susceptible to heat stress
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. The WBGT meter measures simultaneously from three PRTD sensors for wet bulb (tnw), dry bulb (ta) and globe (tg) temperatures. Sensors are manufactured to high accuracy standards: BS 1904 and DIN 43760. The sensors can be mounted directly onto the body of the instrument or they can be remotely positioned via a 30 ft cable. Both meter and sensor unit have a tripod socket for ease of use. WBGT values are calculated simultaneously according to the following formulae for indoors and outdoors. WBGT(in) = 0.7tnw + 0.3tg or WBGT(out) = 0.7tnw + 0.2tg + 0.1ta Processed data values include: WBGT(indoors), WBGT(outdoors), 1 hour (TWA) WBGT values, Relative humidity (%), Dewpoint temperature.

Logged values include date and time plus all measured and computed values. Data Logging intervals from 30 seconds to 1 hour. Results are stored in either ¡ÆF or ¡Æ.C.
 
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 dewpoint 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
  • Construction / Power stations / Foundries / Steel works / Bakeries / Glass manufacturing / Routine monitoring / Medical surveillance testing
 
SPECIFICATIONS
Measurement
Sensing technique Platinum resistance temperature detectors (PRTD)
100 elements 0.1% using 4 wire cable up to 30 ft (10m)
Ta, Dry bulb, air Measuring range: 50 - 140 ¡ÆF (10 - 60 ¡ÆC), accuracy ¡¾ 2.0 ¡ÆF (1.0 ¡ÆC)
Tg, Globe Measuring range: 68 - 248 ¡ÆF (20 - 120 ¡ÆC), accuracy ¡¾ 2.0 ¡ÆF (1.0 ¡ÆC)
Tnw, Natural wet Measuring range: 41 - 104 ¡ÆF (5 - 40 ¡ÆC), accuracy ¡¾ 1.0 ¡ÆF (0.5 ¡ÆC)
Resolution: 0.1% for temperature and relative humidity
Power supply
Battery pack 4 x AA MN1500 cells, Alkaline or rechargeable NiCad
Battery life 20 hours NiCad cells or 85 hours Alkaline cells
External supply 100 - 240 VAC Universal transformer with intelligent internal NiCad fast charger circuitry
Physical
Display 128 x 64 pixel LCD graphics screen with backlight
Keypad 7 key tactile membrane
Weight 26.5 oz (750 gm) instrument only
Dimensions 10.0 x 3.7 x 2.0 in (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; Dewpoint
Relative humidity %
Additional stored values
  WBGT Indoor & Outdoor max, min 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 512kb memory providing up to 49,100 data records
Logging interval 30, 60 sec, 1, 2, 3, 4, 5, 6, 10, 15, 20, 30, 60 minutes
Recording method Record and stop when memory full or overwrite oldest results
Analog output 0 - 2.5 V DC FSD, 500©ª 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


CAT NO. MODEL DEscRIPTION AVAIL PRICE 
CEL180000   180000A   Microtherm Heat Stress monitor with std access in customized case   Yes   5,400,000

 

CEL180042   180042A   Microtherm Heat Stress monitor with std access in customized case plus individual calibration certificate   Yes   5,778,000

 

CEL180043   180043A   30 ft (10m) extention cable   Yes   378,000