Historical Data (Prior 24 Hours) - Extech Instruments WTH600 User Manual

View Dew point (Indoor)
Press the [INDEX] button repeatedly until DEWPOINT appears.
Note: The dew point is the temperature below which the water vapor in air, at a constant
barometric pressure, condenses into liquid water at the same rate at which it evaporates. 'Dew' is
the term used to describe the condensed water that forms on a solid surface. The dew point
temperature is calculated from the indoor temperature/humidity measured at the Main Unit.

12. HISTORICAL DATA (PRIOR 24 HOURS)

The main unit automatically records and displays data from the previous 24 hours on the hour. To
check all of the historical data from the past 24 hours, press the [HISTORY] button. E.g. Current
time 7:25 am, March 28
Press [HISTORY] repeatedly to view prior readings at 7:00am, 6:00am, 5:00am, ..., 5:00am (Mar 27),
6:00am (Mar 27), 7:00am (Mar 27)
The LCD will display the prior indoor and outdoor temperature & humidity, air pressure, wind chill,
wind speed, rainfall along with the time and date.
13. MAXIMUM / MINIMUM MEMORY
Press the [MAX/MIN] button to view the maximum/minimum records in the following sequence:
• Outdoor MAX temperature, Outdoor MIN temperature
• Outdoor MAX humidity, Outdoor MIN humidity
• Indoor MAX temperature, Indoor MIN temperature
• Indoor MAX humidity, Indoor MIN humidity
• Outdoor MAX wind chill, Outdoor MAX wind chill
• Outdoor MAX heat index, Outdoor MIN heat index
• Indoor MAX dew point, Indoor MIN dew point
• MAX pressure, MIN pressure
• MAX average gust
• MAX gust
• Max rainfall
Press and hold [MAX/MIN] for 2 seconds to reset the MAX/MIN records. Note: The display shows
date/time stamp along with all maximum or minimum readings.
14. HI / LO WEATHER ALERT
The WTH60 can alert you to specific weather conditions. When the alert function is active, the
amber LED flashes when certain conditions exist; see table below.
Area
Indoor Temperature
Indoor Humidity
Outdoor Temperature
Outdoor Humidity
Rainfall
Wind speed
15
Types of Alerts Available
HI and LO alert
HI and LO alert
HI and LO alert
HI and LO alert
HI alert (rainfall since midnight)
HI alert
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