Extech HT200 Heat Stress WBGT Meter - User`s Manual
Contents
1. 7 HT200 en GB_V1 3 1 15 EXTECH INSTRUMENTS CLEAR STORED READINGS gaga 1 Step to the Clear Stored Reading screen example shown above using the button The number at the bottom of the display indicates the number of readings stored 50 maximum Press the button and the display will begin flashing Use the up or down arrow button to select YES or NO Select YES to erase all stored readings Press NO to retain the readings in memory Press the button to perform the selected action YES or NO AIR TEMPERATURE OFFSET BABE 4 Step to the Air Temperature Offset screen using the button example screen shown above Press the button to begin editing the display will begin flashing Use the up and down arrow buttons to set the offset value from 9 9 to 9 9 Press the way button to select the desired temperature units Press the button again to save the setting RELATIVE HUMIDITY OFFSET ARAB LO i i Step to the RH Offset screen using the button example screen shown above Press the button to begin editing the display will begin flashing Use the up and down arrow buttons to set the offset value from 9 9 to 9 9 Press the button again to save the setting 8 HT200 en GB_V1 3 1 15 EXTECH INSTRUMENTS BLACK GLOBE TEMPERATURE OFFSET ABBE 1 Step to the Black Globe Temperature Offset screen using the button example screen shown above Press the button to begin editing the display2. EXTECH USER GUIDE INSTRUMENTS Heat Stress WBGT Meter Model HT200 EXTECH INSTRUMENTS Introduction Thank you for selecting the Extech Instruments Model HT200 Heat Stress WBGT Meter The HT200 accurately determines the Heat Stress by factoring a combination of parameters Humidity Temperature and Direct Solar Radiation These factors affect how high body temperatures rise as well as the ability to cool down This device is shipped fully tested and calibrated and with proper use will provide years of reliable service Please visit our website www extech com to check for the latest version of this User Guide Product Updates Product Registration and Customer Support Features Fast responding capacitance sensor Accurate measurements for Wet bulb globe temperature WBGT Black globe temperature TG Humidity RH Air temperature TA Wet bulb WET and Dew point DEW Maximum minimum and data hold Recording Low battery indication LCD display with LED backlighting Manual data recording up to 50 reading sets View data records Selectable temperature units C or F Brass black ball 50mm 2 diameter VVBGT high and low audible and visual alarm functions Auto Power OFF with disable function Safety A WARNING Avoid electromagnetic interference EMI to avoid erratic meter readings PPP BB WARN
3. for Heat Stress Exposure WGBT values in C for reference purposes only Acclimatized Not acclimatized Work 100 75 50 25 100 75 50 25 Rest 0 25 50 75 0 25 50 75 EEES Heav Example of Activities within Metabolic Rate Categories Examples Activities Sitting quietly Resting Sitting with moderate arm movements Sitting with moderate arm and leg movements Standing with light work at machine or bench while using mostly arms Light Using a table saw Standing with light or moderate work at a machine or bench and some walking about Scrubbing in a standing position Moderate Walking about with moderate lifting or pushing Walking level at 3 7 mph 6Km hr while carrying 6 6 lbs 3 Kg weight Carpenter sawing by hand Shoveling dry sand eav K Heavy assembly work on a non continuous basis Intermittent heavy lifting with pushing pulling pick and shovel work Very heavy Shoveling wet sand According to the American Conference of Governmental Industrial Hygienists ACGIH 2005 Copyright 2015 FLIR Systems Inc All rights reserved including the right of reproduction in whole or in part in any form www extech com 12 HT200 en GB_V1 3 1 15
4. will begin flashing Use the up and down arrow buttons to set the offset value from 9 9 to 9 9 4 Press the Wa button to select the desired temperature units 5 Press the button again to save the setting Battery Replacement When the battery icon E appears on the LCD the 9V battery must be replaced Turn off the power and unplug all cables Remove the battery from the rear battery compartment and replace it with a new 9V battery Please observe correct battery polarity and do not switch the unit ON until the battery door is closed and secured When the meter is not in use please remove the battery Never dispose of used batteries or rechargeable batteries in household waste MI As consumers users are legally required to take used batteries to appropriate N collection sites the retail store where the batteries were purchased or wherever a Patteries are sold Disposal Do not dispose of this instrument in household waste The user is obligated to take end of life devices to a designated collection point for the disposal of electrical and electronic equipment AC Adaptor Power The AC power adaptor jack is located on the bottom of the meter See specifications below External AC to DC adapter Voltage 9 Vpc 8714 V Max 500mW Socket Pin positive Ground casing negative External diameter 5 5mm internal diameter 2 1mm a We 9 HT200 en GB_V1 3 1 15 EXTECH INSTRUMENTS Specifications Wet bulb globe temper
5. ING The measurements will be inaccurate if the black ball is touched during a test WARNING If the black ball is damage or deformed in shape inaccurate measurement values will result CAUTION Please place the meter in a warm temperature and low humidity environment for 24 hours after the meter has been used in an overly humid environment CAUTION Please have the meter calibrated yearly for the best results WARNING Do not store this device in direct sunlight or in overly hot and or damp areas 2 HT200 en GB_V1 3 1 15 EXTECH INSTRUMENTS Meter Description 1 Up Arrow MAX MIN button 2 MODE SET button 3 Power ON OFF button 4 UNIT DATA HOLD button 5 LCD Display 6 Temperature 8 Humidity sensor 7 Black Globe sensor 8 Backlight MEM button 9 SEL Alarm button 10 Down arrow REC button 11 AC Adaptor power jack Note Battery compartment on back W8GT a IN LI al f O MAC REC h m Li E 4 11 3 HT200 en GB_V1 3 1 15 EXTECH INSTRUMENTS LCD Display Description Alarm W Po Ra En P Le v s MAX MI f anna EDI N Ll LI LI am Alarm symbol DATA HOLD symbol WBGT Mode Max reading symbol Air temperature mode Black globe temperature mode MIN minimum reading symbol Wet bulb temperature mode USB symbol unused in HT200 O eh dE ee ee pa o Devv point temperature mode pa 3 Primary display area pa N Tempe
6. The alarm function is disabled when the HOLD SET or VIEW DATA RECORDSD function is enabled Display Backlight Press the Backlight Mem button to turn on the LCD backlight The LCD backlight will automatically turn off after 15 seconds Selecting Temperature C F units of measure Press the Unit DH button to select the desired temperature unit of measure Mode Selection Press the Mode Set button to change the mode The available modes are WBGT TA RH TG WET DEW and back to WBGT see definitions below o Wet bulb globe temperature WBGT o Air temperature TA o Humidity RH o Black globe temperature TG monitors the effects of direct solar radiation o Wet bulb temperature WET o Dew point temperature DEW In the WBGT mode press the Sel Alarm button to toggle IN indoor without direct sun exposure and OUT outdoor with direct sun exposure modes Note The mode function is unavailable in the HOLD function and SET function modes 5 HT200 en GB_V1 3 1 15 EXTECH INSTRUMENTS Data Hold Press and hold the Unit DH button for 2 seconds to enable the Data Hold function The HOLD display icon will appear the displayed reading will be frozen until the button is pressed and held again Note The HOLD function is unavailable when the SET function is enabled Manual Data Recording Press the REC button to manually record store the current reading The REC and R symbol will briefly appear on the LCD while the reading is
7. ature WBGT Accuracy Unit Range Resolution o 15 40 C meee C 0 59 0 0 1 1 0 8 Outdoor Without 32 0 138 0 sunlight Indoor 8 Outdoor vvithout sunlight VVBGT 0 7xWET 0 3xTG Outdoor with sunlight WBGT 0 7xWET 0 2xTG 0 1xTA Air Temperature TA Black ewe temperature TG Relative Humidity RH Measurement Range 1 99 3 0 RH 20780 Accuracy 5 0 RH lt 20 or gt 80 10 HT200 en GB_V1 3 1 15 EXTECH INSTRUMENTS Dew point temperature DEW F The value is calculated from the RH and Air temperature Wet bulb temperature WET F The value is calculated from the RH and air temperature Meter Dimensions300 x 70 x 50mm 11 81 x 2 76 x 1 97in Lx W x H LCD 52 mm W x 36mm L 2 05 in W x 1 42 in L Ball Dimensions 50mm diameter 19mm height 2 diameter and 0 75 height Weight 220g 7 760z without batteries Operating Altitude 2000m 6562ft max Sampling Rate One per second 1 Hz Operating Temperature amp Humidity 0 C to 50 C 32 F to 122 F lt 95 RH Non condensing Storage Temperature amp Humidity 10 C to 50 C 14 F to 122 F lt 70 RH Non condensing Power supply 9V battery or AC Adaptor 100Y240V DC 9V 0 5A 9mm Battery life 200 hours Accessories 9V battery Carrying Case and AC100 240V to DC 9V 0 5A 9mm Adaptor 11 HT200 en GB_V1 3 1 15 EXTECH INSTRUMENTS Thermal Hazard Prevention Standards Screening Criteria
8. e customized The available parameters are explained individually below To scroll through the parameters use the button Press the button to start editing a particular parameter as explained below WBGT HIGH ALARM THRESHOLD HI Alarm WBGT HBAR S m p oe LS Step to the WBGT High Alarm Threshold screen using the button At the High Alarm Threshold screen press the button to begin editing the display will begin flashing Press the wa button to select the desired temperature units Use the up and down arrow buttons to set the WBGT High Alarm Threshold value Use the button to select the digit to edit Press the button again to save the setting The meter will now aurally and visually alarm when the High Alarm Threshold has been exceeded To arm disarm the alarm function refer to the ALARM ON OFF section WBGT LOW ALARM THRESHOLD LO Alarm WBGT 8888 3 4 5 6 Step to the WBGT Low Alarm Threshold screen using the button At the Low Alarm Threshold screen press the button to begin editing the display will begin flashing Press the button to select the desired temperature units Use the up and down arrow buttons to set the WBGT Low Alarm Threshold value Use the button to select the digit to edit Press the button again to save the setting The meter will now aurally and visually alarm when the Low Alarm Threshold is reached To arm disarm the alarm function refer to the ALARM ON OFF section
9. rature units pa be Relative humidity mode pa gt Secondary display area pa ds Stored reading R alert amp Memory Recall M icon pa dd Time symbol unused in HT200 pa Date symbol unused in HT200 pa 99 Data Record mode symbol pa 9 Set Mode symbol Indoor symbol WBGT Outdoor symbol WBGT N N N N P Low battery symbol N Ww Auto power off symbol 4 HT200 en GB_V1 3 1 15 EXTECH INSTRUMENTS Operation Powering the meter Press the Power CO button to power the meter ON or OFF To show all of the display symbols at once with the meter OFF press and hold the Power button The firmware version will display for one second after the button is released Auto Power Off The HT200 automatically powers off after approximately 15 minutes of inactivity Enable Disable Auto Power Off With power ON press and hold the Power CO button for at least 2 seconds to disable or enable auto power off The clock O symbol appears on the LCD screen when the Auto Power OFF feature is enabled The symbol disappears when the Auto Power OFF feature is disabled Note The auto power off will be disabled if the SET function or the alarm is enabled Alarm ON OFF Press and hold the SEL Alarm button for at least 2 seconds to turn the alarm function ON armed or OFF disarmed When armed the ALARM display icon will appear When disarmed the ALARM display icon disappears Note
10. stored Note The Record Reading function is unavailable in the HOLD SET and VIEW DATA RECORDS modes View Data Records Press and hold the Backlight Mem button to turn access or exit the View Data Records mode When the View Data Records mode is accessed the record number is shown on the bottom of the display the associated reading is shown at the center or the LCD and the M memory and REC icons will be visible Use the arrow buttons to scroll through the stored readings Press the Mode Set button to change the measurement type i e WBGT TA RH for the currently selected record Press the Unit DH button to switch the temperature unit Press and hold the Backlight Mem button to exit the viewing data records mode Note The View Data Records mode is unavailable when the HOLD or SET function is enabled Maximum Minimum MAX MIN Reading Recording Press and hold the Max Min button to enter the MAX MIN recording mode The LCD will show the MAX icon along with the maximum temperature measurement Use the Max Min button to toggle between Maximum MAX and Minimum MIN readings Press and hold the Max Min button for more than 2 seconds to exit the maximum minimum mode Note The MAX MIN mode is unavailable when the HOLD SET or VIEW DATA RECORDS function is enabled 6 HT200 en GB_V1 3 1 15 EXTECH INSTRUMENTS Setting Mode Press and hold the button to access the Setting mode where a series of parameters can b
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