Observator OMC-160-3, Руководство пользователя

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OMC-160-3
Manual Page 9
practicable. For guidance on the best location refer to the WMO CIMO Guide
2
. The location must be
accessible for yearly maintenance.
4.3 Site preparation
The OMC-160 anemometer bracket can be mounted on a vertical pipe end with an external diameter
between 35-60 mm. The pipe end should stop within 30 mm above the mounting clamp. In the vertical
plane there will be about 75 mm free space between the end of the pipe and the cup unit.
Make sure that the mast is properly fixed to withstand rugged wind forces. For calculation purposes: the
wind-capturing surface of the OMC-160 anemometer is approx. 700 cm
2 (0.07 m 2 ). The pipe end must
be free of vibration.
The following tools are required for mechanical installation of the OMC-160 anemometer:

wrench 10 mm for M6 capped nuts

wrench 16 mm for M10 nuts on U-bolts

compass and/or binocular telescope
4.4 Mounting / mechanical installation
First connect the mounting clamp to the mast / pipe end. The top of the mounting clamp must be
mounted less than 30 mm under the end of the pipe to prevent the pipe end blocking the wind flow to the
cup unit.
Securely tighten the nuts on the U-bolts, preventing the nuts vibrate loose.
4.5 Assembly of cup and vane
The wind-sensors are shipped with the wind vane and cups disconnected from their appropriate units. On
the common unit, the upper spindle is for the wind direction sensor, and the lower spindle for the wind
speed sensor. To prevent damaging the wind vane and cups, properly mount the sensor/bracket
combination on the mast before fitting the wind vane and cup-unit whenever possible.
The shafts of the OMC-160 anemometer and the inside of the cup unit and vane unit are conical. This
enables fastening of the capped nut without the shaft turning along.
The cup unit and the vane blade are made of light materials for optimum response to the wind. Both are
balanced to provide accurate measurement and to prevent vibration. Take care not to damage the cup
unit or the vane blade while mounting.
Place the vane unit and mounting materials on the upper shaft in the following sequence:
1) Vane unit
2) Plain washer
3) Capped nut
Place the cup unit and mounting materials on the lower shaft in the following sequence:
1) Cup unit
2) Spring washer
3) Capped nut
2
Guide to Meteorological Instruments and Methods of Observation, WMO No. 8, 6th Edition, World Meteorological
Organisation, Geneva, Switzerland, ISBN 978-92-63-10008-5