- -
17
4.3
V
ANE WIND SPEED MEASUREMENT PROBES WITH
SICRAM
MODULE
The
AP472 S1
,
AP472 S2
and
AP472 S4
vane probes measure the incident wind speed and flow
rate.
The
AP472 S1, AP472 S4LT
and
AP472 S4HT
probes measure also the temperature using a
thermocouple of type K. On request, they can be fitted with a telescopic rod that eases
measurements in areas difficult to reach (for example vents). The probes' speed and temperature
measurement ranges are outlined in the table below:
Speed (m/s)
Temperature (°C)
Temperature
sensor
Diameter
(mm)
AP472 S1
0.6…25 -25…+80
Thermocouple
K
100
AP472 S2
0.25…20
-25…+80
(functioning temperature)
---- 60
AP472 S4L
0.6…20
-25…+80
(functioning temperature)
---- 16
AP472 S4LT
0.6…20 -30…+120
(*)
Thermocouple
K
16
AP472 S4H
10…50
-25…+80
(functioning temperature)
---- 16
AP472 S4HT
10…50 -30…+120
(*)
Thermocouple
K
16
(*) The temperature limit refers to the probe head, where the vane and temperature sensors are located, and not to the
handle, cable and telescopic rod that can be subjected to maximum temperatures of 80°C.
•
Greater diameters
are suitable for flow measurements in the presence of turbulence with
medium-low air speeds (i.e. at the exit of the ducts).
•
Lower diameters
are suitable in applications where the probe surface is much smaller than the
duct cross section within which the measurement is carried out, i.e. ventilation ducts.
4.3.1 Calibration
The AP472 S1, AP472 S2 and AP472 S4 probes are calibrated in the factory: no calibration is
required by the user.
4.3.2 Operation
1.
Where present, extend the telescopic rod to the necessary length paying attention to the cable so
that it can slide freely and without strain.
2.
Introduce the probe in the air flow being measured, maintaining the arrow at the top of the probe
parallel to the flow as indicated in the following figure.
