Fieldpiece ATA1 User Manual

Relative Humidity (%RH)
Relative humidity is often found to help evaluate
air comfort or to find the target superheat of an air
conditioning system. There are a few ways to find
%RH. You can use an accessory head like the
ARH4 to measure %RH, wet bulb, dew point or dry
bulb directly. You could also use an actual sling psy-
chrometer, or use the ATA1 thermocouple and an
ATWB1 wet bulb thermocouple with the chart to the
left.
50 52 54 56 58 60 62 64 66 68 70 72 74 76
55 71 82 94
60 49 58 68 78 89 100
65 32 40 49 57 66 75 85 95
70 20 27 34 41 48 56 64 73 81 91 100
75 11 17 22 28 35 41 48 55 63 70 78 87 96
80 4 9 14 19 24 30 36 42 48 54 61 68 76 84
85 3 7 12 16 21 26 31 36 42 48 54 60 67
90 2 6 10 14 18 23 27 32 37 42 48 53
95 2 5 9 12 16 20 2428333742
100 2 5 8 11 15 1822252934
105 2 4 7 10 1316202327
110 2 4 7 9 12 15 18 21
115 2 4 6 9 11 14 16
Relative Humidity (%RH)
Dry Bulb Temperature (°F)
Wet Bulb Temperature °F
Relative Humidity (%RH)
Relative humidity is often found to help evaluate
air comfort or to find the target superheat of an air
conditioning system. There are a few ways to find
%RH. You can use an accessory head like the
ARH4 to measure %RH, wet bulb, dew point or dry
bulb directly. You could also use an actual sling psy-
chrometer, or use the ATA1 thermocouple and an
ATWB1 wet bulb thermocouple with the chart to the
left.
50 52 54 56 58 60 62 64 66 68 70 72 74 76
55 71 82 94
60 49 58 68 78 89 100
65 32 40 49 57 66 75 85 95
70 20 27 34 41 48 56 64 73 81 91 100
75 11 17 22 28 35 41 48 55 63 70 78 87 96
80 4 9 14 19 24 30 36 42 48 54 61 68 76 84
85 3 7 12 16 21 26 31 36 42 48 54 60 67
90 2 6 10 14 18 23 27 32 37 42 48 53
95 2 5 9 12 16 20 2428333742
100 2 5 8 11 15 1822252934
105 2 4 7 10 1316202327
110 2 4 7 9 12 15 18 21
115 2 4 6 9 11 14 16
Relative Humidity (%RH)
Dry Bulb Temperature (°F)
Wet Bulb Temperature °F

Fieldpiece ATA1 Specifications

General

Brand	Fieldpiece
Model	ATA1
Category	Measuring Instruments
Language	English