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Summary of Contents for Extech Instruments HT200
- Page 1 USER MANUAL Heat Stress WBGT Meter Model HT200 Additional User Manual Translations available at www.extech.com 800.561.8187 information@itm.com www. .com...
- Page 2 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 ...
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Page 3: Meter Description
EXTECH INSTRUMENTS Meter Description Up Arrow/MAX‐MIN button MODE/SET button Power ON‐OFF button UNIT/DATA HOLD button LCD Display Temperature & Humidity sensor Black Globe sensor Backlight/MEM button SEL/Alarm button Down arrow/REC button AC Adaptor power jack Note: Battery compartment on back HT200‐en‐GB_V1.4 11/16 800.561.8187 information@itm.com www. .com... - Page 4 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) 10. Dew point temperature mode 11. Primary display area 12. Temperature units 13. Relative humidity mode 14. Secondary display area 15. Stored reading ‘R’ alert & Memory Recall ‘M’ icon 16. Time symbol (unused in HT200) 17. Date symbol (unused in HT200) 18. Data Record mode symbol 19. Set Mode symbol 20. Indoor symbol (WBGT) 21. Outdoor symbol (WBGT) 22. Low battery symbol 23. Auto power off symbol HT200‐en‐GB_V1.4 11/16 800.561.8187 information@itm.com www.
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Page 5: Operation
EXTECH INSTRUMENTS Operation Powering the meter Press the Power 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 button for at least 2 seconds to disable or enable auto power‐off. The clock 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: 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) ... - Page 6 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. HT200‐en‐GB_V1.4 11/16 800.561.8187 information@itm.com www. .com...
- Page 7 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) 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. HT200‐en‐GB_V1.4 11/16 800.561.8187 information@itm.com www. .com...
- Page 8 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 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 button to select the desired temperature units. Press the button again to save the setting. RELATIVE HUMIDITY % OFFSET 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. HT200‐en‐GB_V1.4 11/16 800.561.8187 information@itm.com www. .com...
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Page 9: Battery Replacement
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 V (8~14 V Max) / 500mW. DC Socket: Pin positive, Ground casing negative. External diameter 5.5mm internal diameter 2.1mm HT200‐en‐GB_V1.4 11/16 800.561.8187 information@itm.com www. .com... -
Page 10: Specifications
Accuracy @15~40 C °C 0~50.0 0.1 ±0.8 °F 32.0~122.0 0.1 ±1.5 Black globe temperature (TG) Unit Range Resolution Accuracy @15~40 C °C 0~80.0 0.1 ±0.6 °F 32.0~176.0 0.1 ±1.1 Relative Humidity (%RH) Measurement Range 1%~99% ±3.0%RH (20~80%) Accuracy ±5.0%RH (<20% or >80%) Resolution 0.1% HT200‐en‐GB_V1.4 11/16 800.561.8187 information@itm.com www. .com... - Page 11 Wet bulb temperature (WET) Unit Range Resolution °C ‐21.6~50.0 0.1 °F ‐6.9~122.0 0.1 The value is calculated from the RH and air temperature Meter Dimensions300 x 70 x 50mm (11.81 x 2.76 x 1.97in.) [L x 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 (7.76oz.) without batteries Operating Altitude 2000m (6562ft) max. Sampling Rate One per second (1 Hz) Operating Temperature & Humidity 0°C to +50°C (32°F to 122°F), <95%RH. (Non‐condensing) Storage Temperature & Humidity ‐10°C to +50°C (14°F to 122°F), <70% RH. (Non‐condensing) Power supply 9V battery or AC Adaptor 100~240V DC 9V/ 0.5A (9mm) Battery life 200 hours Accessories 9V battery, Carrying Case, and AC100~240V to DC 9V/0.5A (9mm) Adaptor HT200‐en‐GB_V1.4 11/16 800.561.8187 information@itm.com www. .com...
- Page 12 Screening Criteria for Heat Stress Exposure (WGBT values in °C); for reference purposes only. Example of Activities within Metabolic Rate Categories* 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 Heavy 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 © 2015‐2016 FLIR Systems, Inc. All rights reserved including the right of reproduction in whole or in part in any form ISO‐9001 Certified www.extech.com HT200‐en‐GB_V1.4 11/16 800.561.8187 information@itm.com www. .com...
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Heat Stress meter HT200 should have OL display on the screen what should we do for this problem