Vaisala LT31 - Page 68

User's Guide ______________________________________________________________________
68 __________________________________________________________________ M210667EN-C
1. Select the location and perform site survey:
- Check that the installation area is in accordance with the ICAO
recommendations.
- Check the ground level at the recommended safety distance of
120 m from the runway. It should have approximately runway
surface level.
- Select the final foundation positions.
- Determine the transmitter and receiver positions.
2. Prepare cabling plan:
- Grounding cabling layout and cable type.
- Power supply cabling layout and cable type.
- Intercommunication signal cabling between transmitter and
receiver. Layout and cable type.
- Consider communication needs, generate modem/signal cabling
layout and cable type.
3. Order the construction materials and cables.
4. Do the digging for the cables and foundation.
5. Cast the concrete foundations.
6. Prepare the cables:
- Connect the AC and signal cables of the site to a separate
junction box and have them ready for direct connection to the
optional TERMBOX or the instruments.
7. Set the foundation screws.
8. Install the receiver mast:
- Mount the receiver mast and align it vertically.
- Assemble the weather protection hood.
- Align the support unit horizontally.
- Mount the optional LM21.
9. Install the transmitter mast:
- Mount the receiver mast and align it vertically.
- Assemble the weather protection hood.
- Align the support unit horizontally.
- Mount the optional LT31OBS.
10. Finalize the transmitter installation:
- Install the transmitter measurement unit.
- Mount the PWD Forward Scatter Sensor.
- Connect the optional LT31OBS.
- Make intercommunication connections to the receiver.