TM 5-3610-285-14
(5)
Convert WET and DRY bulb thermometer readings to relative humidity as follows:
Air Temperature (DRY Bulb):
68 F
WET Bulb:
62 F
Depression = DRY Bulb (t) WET Bulb (tl) = 68F 62F = 6F
Depression = 6 F
Use left column to find air temperature of 68 F.
Use top column to find depression of 6 F.
The intersection of both columns gives the percent of relative humidity, in this case 71%
10-17
