How do you use a WBGT meter?
How do you use a WBGT meter?
The meter measures WBGT index with (IN) or without (OUT) direct sun exposure. Hold down the MODE/▲ for more than 1 second to alternate between settings. The IN or OUT icon will appear in the display. The HT30 has a user settable heat stress alarm.
How do you calibrate a WBGT?
Plug the sensor probe into the 75 % calibration salt bottle. Press the power button for 2 seconds to start until blinking “7X. X % ” displays on the screen.” Meter will finish calibrating in about 60 minutes (1 hour) or when the value stops blinking.
How do you figure out the heat index?
Heat Index (definition) To find the Heat Index temperature, look at the Heat Index chart below. As an example, if the air temperature is 96°F and the relative humidity is 65%, the heat index (how hot it feels) is 121°F.
What does a sling psychrometer read?
A sling psychrometer can be used to find relative humidity, which is expressed as a percentage. It is computed by multiplying the amount of moisture in the air at a given temperature, dividing by the maxi- mum amount of moisture the air could contain at that same temperature, and then multiplying the quotient by 100.
How accurate is wet bulb temperature?
Taking into account the many other potential sources of error, the effective accuracy of the wet- and dry-bulb devices installed in most environmental chambers is no better than 3 to 6 %rh. The error tends to be the largest at low humidity and low temperatures where readings are usually too high.
Who is at risk for heat stroke?
Those at greatest risk for heat-related illness include infants and children up to four years of age, people 65 years of age and older, people who are overweight, and people who are ill or on certain medications.
What is black globe temperature?
Dimiceli has derived a linear expression to estimate the black globe temperature to within about 0.666 °C, thus estimating the WBGT Index to within about 0.333 °C or . 733 °F.
What’s the highest heat index ever recorded?
The highest heat index ever recorded in the world was 178* in Saudi Arabia on July 8, 2003. The air temperature was 108* and the dewpoint was 95*. The highest air temperature recorded in Iowa was 118* on July 20, 1934, in Keokuk.
How do you read a heat index chart?
Starts here2:59How To Use A Heat Index Chart – YouTubeYouTube
What is whirling psychrometer?
whirling psychrometer (sling psychrometer) A psychrometer with a handle, which allows rapid rotation of mounted wet-bulb thermometers and dry-bulb thermometers to ensure air flow around the bulbs. A Dictionary of Earth Sciences.
