Cascade TEK TVO-2 - Maximum Obtainable Vacuum; Pressure Units Conversion Chart

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OPERATION
MAXIMUM OBTAINABLE VACUUM
The maximum obtainable vacuum is determined by the altitude of the oven workspace or laboratory
environment. The atmosphere is less dense at higher altitudes than at sea level. While a vacuum
pump will evacuate the same percentage of atmosphere from the oven chamber, less overall
pressure is expelled because of the reduced density.
Altitude
(Feet)
Altitude
(Meters)
Atmospheric
Pressure
Maximum
Vacuum Level
Attainable
Sea Level Sea Level 14.70 psi -29.9 inHg
1000ft 305m 14.16 psi -28.9 inHg
2000ft 610m 13.66 psi -27.8 inHg
3000ft 914m 13.16 psi -26.8 inHg
4000ft 1219m 12.68 psi -25.8 inHg
5000ft 1524m 12.22 psi -24.9 inHg
6000ft 1829m 11.77 psi -24.0 inHg
7000ft 2134m 11.33 psi -23.1 inHg
8000ft 2438m 10.91 psi -22.2 inHg
9000ft 2743m 10.50 psi -21.4 inHg
10,000ft 3048m 10.10 psi -20.6 inHg
*In gauge pressure
PRESSURE UNITS CONVERSION CHART
InHg kPa Kgf/cm
2
bar psi mmHG mmH
2
O
1 inHg
1 3.3863 0.0345 0.3386 0.4911 25.400 345.32
1 kPa
0.2953 1 0.0102 0.01 0.1450 7.5006 101.97
1 Kgf/cm
2
28.9590 98.0665 1 0.9806 14.2233 735.55 10000.27
1 bar
29.5300 100 1.0197 1 14.5037 750.06 10197.44
1 psi
2.0360 6.8947 0.0703 0.0689 1 51.7150 703.09
1 mmHG
0.0394 1.3332 0.0014 0.0013 0.0193 1 13.5954
1 mmH
2
O
0.0028 0.0098 0.0001 0.0001 0.0014 0.0029 1