Amprobe TMA-21HW User Manual page 9

8 MX/MN key : Push "MX/MN" key to circulate the reading of Maximum,
Minimum, Average and Current record mode. Push "MX/MN" key for 2
seconds to exit this mode.
9 SET key : Push "SET" key to enter setting mode.
• Air velocity unit setting mode.
• Flow setup mode.
• Real – Time setting mode.
• Select a time constant mode.
• Select auto data memory interval time mode.
• Auto power off time setting mode.
• Backlight time setting mode.
• Standard pressure setting mode.
• Calibration mode.
10 VEL %RH key: Push "VEL %RH" key to circulate the display of following reading:
Screen 1: Air Velocity display
Flow setup display
Air Flow display
Screen 2: %RH (Relative Humidity) display
Temperature display
WET (Wet bulb temperature) display
Screen 3: Air Velocity display
DEW (Dew point temperature) display
WCT (Wind chill temperature) display
Screen 4: %RH (Relative Humidity) display
HI (Heat index) display
HD (Humidex) display
Note:
Heat Index:
The Heat Index is determined using the dry bulb temperature and relative
humidity.
It is based upon charts available from the U.S. National Weather Service.
The Heat Index represents how an average person feels relative to climate
conditions. For a given temperature, the higher the humidity, the higher the
heat index will be.
The Heat Index is defined over a temperature range of 70°F to 120°F (21°C to
49°C) and a relative humidity range of 30% to 99%. Outside of this range, the
meter will show dashes in the display for the Heat Index.
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