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2.8 Level 4 Siting

In many sites it might be difficult to find an open area that complies with the requirements for

Level 1 (siting requirements for all three sensors are met) or Level 2 (siting requirements for

precipitation and temperature are met). In such cases, it is suggested that the station is located in

an open area that is the closest possible match to a Level 2 clearing (see Section 0) and that the

site conditions are carefully documented and monitored annually. In particular, watch for the

following:

• Make sure the Temperature/RH sensor is as far as possible from surrounding vegetation

to minimize microclimatic conditions that could affect the readings.

• Ensure that the precipitation gauge has a clear view of the sky and is as far as possible

from surrounding obstacles to avoid water ‘bouncing in’ from other sources, thus

contaminating the readings.

• Locate the radiation sensor following the guidelines for Level 2 (within 100 m of the

climate station). If this is not feasible, install the radiation sensors as high as possible in

the current climate base and document carefully the site conditions.

• Always document carefully the site conditions and monitor conditions annually.

2.9 Ordering The Equipment

Once an adequate siting strategy has been reached, the appropriate equipment can be ordered.

A standardized list of equipment is shown in Appendix A.1. Allow ample time (minimum of 4

weeks) for the equipment to arrive at customs in the destination country and an additional 4

weeks for clearing the equipment through customs and arriving at their destination.

3 Assembly of the Climate Station

This section describes the whole process of setting up the climate station from the moment the

equipment is received to a full test run of the climate station with all its sensors. The process is

outlined in general with the main steps; for details refer to the instruction manuals accompanying

the base tower, data logger and sensors.

3.1 Testing all the instrumentation upon receipt

Equipment/supplies needed:

• Data logger (CR1000)

• PC200W software (included with data logger)

• Blank memory card

• Battery (UB121000)

• Two Temperature/RH sensors (HMP45C-L)

• Two Solar Radiation sensors (LI200X-L)

• Precipitation sensor (TB4MM-L)

• Computer

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Campbell CM10K Spezifikationen Seite 17