TM 5-6675-328-14
Control or Indicator
Function
ON/OFF Switch
Turns on fan motor and, when turned fully right,
provides thermometer illumination.
Psychrometric Chart
Utilizes wet and dry bulb temperatures to
determine relative humidity.
Slide Rule
Used to determine relative humidity.
After
taking thermometer readings, aline wet and dry
bulb readings.
10-4.3 Altimeter/Barometer.
Control or Indicator
Function
Indicating Needle
Indicates barometric pressure or altitude.
Carrying Case and Strap
Holds instrument.
Inner Scale
Graduated in inches of mercury for reading
barometric pressure.
Outer Scale
Graduated in feet for determining altitude.
Adjustable Outer Rim
Used to adjust altitude scale.
10-5