Psychrometric Charts
Systéme International (SI) Psychrometric Charts
|
ASHRAE
Desig.
|
Temperature Range
|
Humidity Ratio
massWV/massDA
|
Barometric Pressure
|
Elevation
|
|
Pascal
|
millimetre Hg
|
metre
|
|
SI-1
|
Normal:
0°C to 50°C
|
0 to 0.03
|
101,325
|
760.0
|
Sea Level
|
|
SI-2
|
Low:
-40°C to 10°C
|
0 to 0.05
|
101,325
|
760.0
|
Sea Level
|
|
SI-3
|
High:
10°C to 120°C
|
0 to 0.09
|
101,325
|
760.0
|
Sea Level
|
|
SI-4
|
Very High:
100°C to 200°C
|
0 to 0.09
|
101,325
|
760.0
|
Sea Level
|
|
SI-5
|
Normal:
0°C to 50°C
|
0 to 0.03
|
92,634
|
694.8
|
750
|
|
SI-6
|
Normal:
0°C to 50°C
|
0 to 0.03
|
84,556
|
634.2
|
1500
|
|
SI-7
|
Normal:
0°C to 50°C
|
0 to 0.03
|
77,058
|
578.0
|
2250
|
|
SI-8
|
Ultrahigh:
200°C to 320°C
|
0 to 1.0
|
101325
|
760.0
|
Sea Level
|
|
SI-9
|
Ultrahigh:
200°C to 320°C
|
0 to 1.0
|
92634
|
694.8
|
750
|
|
SI-10
|
Ultrahigh:
200°C to 320°C
|
0 to 1.0
|
84556
|
634.2
|
1500
|
|
SI-11
|
Ultrahigh:
200°C to 320°C
|
0 to 1.0
|
77058
|
578.0
|
2250
|
|
SI-12
|
Ultrahigh:
200°C to 320°C
|
0 to 1.0
|
200,000
|
1500.1
|
-6123
|
|
SI-13
|
Ultrahigh:
200°C to 320°C
|
0 to 1.0
|
500,000
|
3750.3
|
-15732
|
|
SI-14
|
Ultrahigh:
200°C to 320°C
|
0 to 1.0
|
1,000,000
|
7500.6
|
-24199
|
|
SI-15
|
Ultrahigh:
200°C to 320°C
|
0 to 1.0
|
2,000,000
|
15001.2
|
-33860
|
|
SI-16
|
Ultrahigh:
200°C to 320°C
|
0 to 1.0
|
5,000,000
|
37503.1
|
-48752
|
|
*SI-17
|
Full Range
0°C to 400°C
|
0 to 1.0
|
5529.3
|
41.47
|
20,000
|
|
*SI-18
|
Full Range
0°C to 400°C
|
0 to 1.0
|
101,325
|
760.0
|
Sea Level
|
|
*SI-19
|
Full Range
0°C to 400°C
|
0 to 1.0
|
2,000,000
|
15001.2
|
-33860
|
* Prepared by University of Missouri-Rolla (August 2000)
Inch-Pound (I-P) Psychrometric Charts
|
|
ASHRAE
Desig.
|
Temperature Range
|
Humidity Ratio
massWV/massDA
|
Barometric Pressure
|
Elevation
|
|
Pascal
|
inches Hg
|
feet
|
|
IP-1
|
Normal:
32°F to 120°F
|
0 to 0.03
|
101325
|
29.9213
|
Sea Level
|
|
IP-2
|
Low:
-40°F to 50°F
|
0 to 0.005
|
101325
|
29.9213
|
Sea Level
|
|
IP-3
|
High:
60°F to 250°F
|
0 to 0.09
|
101325
|
29.9213
|
Sea Level
|
|
IP-4
|
Normal:
32°F to 120°F
|
0 to 0.03
|
84307
|
24.8959
|
5000
|
|
IP-5
|
Normal:
32°F to 120°F
|
0 to 0.03
|
76712
|
22.6532
|
7500
|
|
IP-6
|
Ultrahigh:
400°F to 600°F
|
0 to 1.0
|
101325
|
29.9213
|
Sea Level
|
|
IP-7
|
Ultrahigh:
400°F to 600°F
|
0 to 1.0
|
92500
|
27.3152
|
2500
|
|
IP-8
|
Ultrahigh:
400°F to 600°F
|
0 to 1.0
|
84307
|
24.8959
|
5000
|
|
IP-9
|
Ultrahigh:
400°F to 600°F
|
0 to 1.0
|
76712
|
22.6532
|
7500
|
Note: These SI and I-P charts are based on the dry-air component of the moist-air mixture having a composition as described in the pertinent underlying research. (The relative molecular mass of dry air is 28.9645 kg/kmol except for charts SI-8 through SI-19, for which the molecular mass of dry air is 28.95849 kg/kmol.)