Vaisala WAC151 Cross Arm - WAC151

WAC151 User Guide
Document code
M210349EN
Revision
C
Language
English
Product
WAC151
Document type
User guide
The WAC151 cross arm assembly supports the installation of:
  • Vaisala Anemometer WAA151 and Vaisala Wind Vane WAV151
  • Vaisala Heated Anemometer WAA252 and Vaisala Heated Wind Vane WAV252
The cross arm assembly consists of a junction box and an anodized aluminum tube with a mounting clamp for installation on the top of a pole mast.
1
Mounting flange for Vaisala anemometer
2
Junction box
3
Mounting flange for Vaisala wind vane

A watertight junction box includes a screw terminal block for power and signal cables. The junction box houses a thermostat switch for controlling WAA151 and WAV151 shaft heating. The thermostat switches on in temperatures below +4 °C (39.2 °F).

WAA252 and WAV252 do not use the cross arm thermostat switch. They have the temperature control integrated in the sensor electronics.

The junction box has 4 cable glands. Typically, 3 cable glands are in use; 2 for sensor cables and 1 for the signal cable. The fourth gland is reserved, for example, for the cable supplying heating power to heated sensors.