Cascade Sciences CVO-2, Руководство по установке и эксплуатации

Страница: 45 / 52

45 | P a g e
cascadesciences.com | Tel. 503 847-9047
OPERATION
M
AXIMUM
O
BTAINABLE
V
ACUUM
The maximum vacuum obtainable, as measured by the oven gauge , is in part a function of altitude
While a vacuum pump will evacuate the same percentage of atmosphere from the oven chamber at
higher altitudes, less
overall pressure is expelled because of the reduced density.
Put differently, at sea level there are 29.9 inches of mercury pressure that can be drawn out of the
oven chamber by a vacuum pump. At 5000ft (1524m), there are only 24.9 inches of atmospheric
pressure to be evacuated from the oven chamber.
Altitude (Feet) Altitude (Meters) Atmospheric Pressure
Max Vac
Obtainable
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
P
RESSURE
U
NITS
C
ONVERSION
C
HART
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