DPM TT 570 D Betriebshandbuch - Seite 13
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Pressure:
Pa
Pa
1
mbar
0.010
mmH
O
0.102
2
inH
O
0.004
2
‐3
mmHg 7.501 x 10
‐4
inHg 2.953 x 10
‐4
PSI 1.451 x 10
Volume:
3
m
/sec
3
m
/sec
1
3
m
/hr
3600
l/sec
999.97
cfm
2118.88
Velocity:
m/sec
m/sec
1
ft/min
196.85
Air Velocity Calculations using S.I Scales:
For non‐standard air conditions:
V = Velocity in m/sec
PT = Pitot Tube Factor (for Ellipsoidal type 1.000)
B = Barometric pressure in mbar
T
= Absolute temperature in °K (= t in °C + 273 where t = airstream temperature)
Pv = Velocity pressure in Pa
Air Velocity Calculations using Imperial Scales:
For non‐standard air conditions: V = 4006 x PT 30 x T x Pv
V = Velocity in ft/min
PT = Pitot Tube Factor (for Ellipsoidal type 1.000)
B = Barometric pressure in inHg
T = Absolute temperature in °R (= t in °F + 460 where t = airstream temperature)
Pv = Velocity pressure in wg
CONVERSION TABLES
mbar
mmH
O
2
100.0
9.806
1
0.098
10.20
1
0.402
0.039
0.750
0.074
0.029
2.895 x 10
0.014
1.423 x 10
3
m
/hr
l/sec
0.0002
0.001
1
3.6
0.2777
1
0.5885
2.1189
ft/min
0.005
1
V = 1.291 x PT 1 013.25 x T x Pv
inH
O
mmHg
2
249.1
133.3
2.491
1.333
25.40
13.60
1
0.535
1.868
1
‐3
0.074
0.039
‐3
0.036
0.019
cfm
0.0004
1.699
0.4719
1
B
293
B
528
TT Series LR Manual
Page 11
inHg
PSI
3385
6892
33.85
68.92
345.42
702.8
13.51
27.67
25.64
51.70
1
2.305
0.4338
1