CiDRA AIRtrac, Installation, Operation & Support Manual

Page: 20 / 52

21798-01-EN Rev 02 Page 18
4.2.2 System Operating Temperature
* Sensor and Battery
-4°F to +140°F (-20°C to +60°C)
Receiver Module
-4°F to +140°F (-20°C to +60°C)
Display In-Cab
-4°F to +140°F (-20°C to +60°C)
Battery Charging 32°F to +113°F (0°C to +45°C)
* Concrete temperature between 32°F to +122°F (0°C to +50°C)
The sensor, receiver, and display are suitable for operation in 0 to
95% non-condensing humidity environments.
Sensor Installation
The following steps detail installation of the AIRtrac Mobile System.
4.3.1 Sensor Location and Orientation
The AIRtrac Mobile sensor is installed in place of the existing drum
access hatch. For accurate air and temperature readings it is
important that the sensor is installed in the proper orientation relative
to the drum rotation direction. The sensor assembly has an orientation
label that points in the direction of rotation when the drum is rotating in
the charging direction (Figure 6).
Figure 6: Label Indicating Proper Sensor Orientation
4.3.2 Remove Existing Hatch / AIRtrac Sensor
Remove the existing mixer drum access hatch. Clean and inspect
sealing surface and nut plate per drum
manufacturer’s recommended
practices. It is very important that the nut plate is in good condition
and therefore should be replaced if excessive wear or any defects are
found, or if there is any concern that its mechanical integrity is
compromised.
If an AIRtrac sensor is already installed, use caution when removing,
as it is heavy (56 lbs / 25 kg) and can cause serious injury if
mishandled or dropped. Two (2) people are required for removal.
Loosen all retaining bolts and leave several in place while prying the
hatch free. Remove all bolts, except the bottom retaining bolt to help
support the weight before the hatch is lifted off the drum. See Figure 8
for example of retaining bolt.