Standard vs. Actual Velocity
17
pressure is 14.24 psia. You take a measurement
and the display reads 1200 ft/min.
Act Vel
ft
.
.
460 + 55
14.24
=
+
=
1200
460 70
14 7
12037
.
.
/ min
Example No. 2
You need to measure the actual velocity in a
plenum. The air pressure is 99.4 kPa and the
temperature is 27°C. The display reading on the
V
ELOCI
C
HECK
is 2.30 m/s.
Act Vel
m s
.
.
273+ 27
99.4
=
+
=
2 30
273 211
1014
2 39
.
.
.
.
/
