Activity 5 - Using a Sling Psychrometer A sling psychrometer is an instrument that helps determine realtive humidity and dew point temperature. It is two thermometers, one with a "sock" on it that is wet. The other thermometer is considered to be "dry." After dipping the sock in some water, the psychrometer is then rotated by hand for 60 seconds. Temperatures are taken from the "wet" thermometer and the "dry" thermometer, compared (subtracted) to find the difference, then referenced on Table 3 and Table 4 (separate documents found on Canvas for the Lab). Refer to Table 3 and Table 4 (found separately on Canvas) to complete the following table. 16. Dry-bulb (Air) Temperature DRY-BULB TEMPERA- TURE (°C) -20 -18 -16 -14 -12 -10 HNUTNONTONHARTERED -4 -2 0 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 DRY-BULB TEMPERA- TURE (°C) 4 COOLHUDAZHDOTHEKE 6 8 10 12 14 16 18 20 22 24 26 28 Reading 1 Reading 2 Reading 3 30 32 34 36 38 40 1 28 40 48 55 11 61 23 66 33 71 41 73 48 77 79 58 81 63 83 67 85 70 86 72 2 87 74 88 76 -20 -18 -28 -16 -24 -14 -21-36 -18-28 -12 -10 -14 -22 -8 -12 -18 -29 -6 -10 -14 -22 -4 -2 0 89 79 88 78 67 90 80 71 91 81 72 54 43 11 91 82 74 92 92 84 76 92 93 86 78 93 86 93 86 79 93 86 94 87 ALISE 94 87 94 89 1 2 -33 -3 83 75 -1 3 83333~NGSTEN 85 77 14 25 27 0 13 20 6 37 45 1659 62 65 研 69124万飞刀8刀01122 01 20 28362 6147024689012乃456% 29 39 2283845PSTE∞o a ww ∞NENBR -7-22 -17 -29 13 -5-8-13-20 ANASTASSFANGSTE 3 4 -6 4 6 Dry-bulb Temp 20° C 32° C 8° C 9 4 11 42 1 -2 17 20 Table 3 - Relative Humidity (percentage) 22 24 PARENTNISKING585 26 28 32 13 11 15 14 4 6 9 16 -9-15 -24 18 73 68 20 22 5 24 1 27 30 29 11 20 31 27 34 33 36 35 35 39 43 48 50 54 -11-17 56 58 60 62 64 65 66 69 69 70 71 5 -4 -7 -11 -19 PRENTINO VANGNER 6 CHEERSEN 6 -1 -4 -7 -13 -21 14 22 10 17 24 28 41 33 45 37 40 44 46 49 Depression of Wet-bulb Temperature (Dry-bulb Temperature - Wet-bulb Temperature = Depression of the Wet Bulb) 28 33 38 48 51 53 55 57 59 61 62 63 64 66 67 1 -2 -5 -9 -14 7 51 53 55 56 58 59 4 -5 -9-14 7 Wet-bulb Temp Difference 18° C 25° C 6° C DAFTANTES 12 ZH9SZLTOSDANTZAN 8 9 10 11 12 13 0 6 13 19 25 4 10 2 16 8 29 21 33 14 26 19 30 23 36 40 33 27 42 36 30 45 39 34 47 42 36 49 44 51 46 52 48 54 50 60 55 51 61 57 52 48 -2 -5 -9-16 26 4 1 -2 -5-10-17 10 7 4 10 8 14 12 10 17 15 13 Table 4 - Dew Point Temperature (°C) 19 17 16 21 19 18 24 22 21 39 DRUNNSKREN226 24 23 41 43 44 28 27 25 30 29 28 46 32 31 30 11 1 -1 -6-10-17 4 2 -2 -5-10-19 8 6 9 STADTERESSE 14 11 Relative Humidity Values 0 1 16 14 7 1 6 17 11 15 20 28 23 31 26 34 29 32 34 40 36 19 17 21 20 12 24 22 21 25 28 27 36 38 42 38 44 -2 -5 -10 -19 5 3 -1 -5-10 Depression of Wet-bulb Temperature (Dry-bulb Temperature Wet-bulb Temperature = Depression of the Wet Bulb) 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Dew-Point Temperature Values 6 9 12 STORBANN 18 40 36 33 20 10 14 18 13 21 17 12 25 20 16 27 22 30 26 32 28 34 30 25 5 2 -1 -5 -10-18 A. The dry-bulb thermometer gives the current air temperature. 7 4 10 8 0 4 0 15 13 11 8 14 15 16 17 18 19 9 16 14 25 23 21 19 19 17 24 22 90415B25DD 89315 935R 6492692488 19 3 0 -4 -9 -18 13 17 15 0 5 12 8 Relative Humidity 14 11 18 14 28HHTR2 21 17 25 23 20 18 16 -3 -9-16 B. The wet-bulb thermometer is covered with a cloth wick that is dipped in water. 4 CLEANER 8 11 Roam temperature water -2 -8-15 2 -2 -7 -14 6 3 -1 10 7 4 13 11 14 8 12 13 10 16 19 48836 C. The thermometers are spun until the temperature of t wet-bulb thermometer stops perature of the declining. Then the thermome tars are read and the data is interpreted using Table 3 and Table 4 Dew-Pt Temp 20 21 22 4 7 16 13 10 5703 13 10 -5-12-29 0 -4-10 5 9 7 1 -3 -9 6 2 -2 |