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The error reported in case of misalignment is reported in the following graph:
The abscissas reports the rotation angle around its vertical axis compared to the flow direction
(yawing), in ordinates the % error on the differential pressure Pv measurement. As you can see a
difference of over 10° entails an error on the differential pressure Pv measurement of less than
0.5%.
D
P
IMENSIONS OF
ITOT TUBES
T1-...
Diameter d
3
(mm)
Tip
length t
33
(mm)
Length L
300
(mm)
Order Code
T1-300
(*)
(*) TC = Pitot tubes with K thermocouple
F
LOW RATE MEASUREMENT
The flow rate measurement requires knowledge of the duct or vent area orthogonal to the flow: the
menu items indicated by "SECT m2" and "SECT INC2" define the section area m
To set the area value, select the "SECT m2" menu item, and using the arrows, set the desired value
2
in m
. Confirm the selection by pressing the ENTER key.
HD2114P/HD2134P
+0.6
+0.4
+0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
15°
10°
T2-...
T3-...
5
55
88
400
500
600
800
T3-500
T2-400
T3-800
T2-600
T3-800TC
5°
0
5°
ANGLE
T4-...
8
10
135
500
800
1000
T4-500
T4-800
T4-800TC
T4-1000
T4-1000TC
- 16 -
10°
15°
t
d
2
or inch
2
.
V2.3
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