Observator OMC-160-3, Manual

Page: 15 / 25

OMC-160-3
Manual Page 15
6 Maintenance
6.1 Maintenance schedule (preventive maintenance)
Initial maintenance interval is two year under normal circumstances. Maintenance is best planned in the
season when outside work is most comfortable.
For critical applications (where wind data is of major importance) under severe conditions, an initial
maintenance interval of 12 to even 6 months might be considered.
The maintenance interval can be adjusted depending on the maintenance experience.
Periodic maintenance comprises inspection on the following points:

check ball bearings; replace if necessary

check cabling and cable support

check mounting; retighten if necessary

clean the sensor if necessary
Refer to paragraph 6.5 for more information about the mechanical aspects. If the ball bearings require
replacement, the OMC-160 anemometer must be removed from its location.
6.2 Removing the OMC-160 anemometer from its location
1) Disconnect the power supply tot the sensor (display / data collection unit or PSU).
2) Remove the vane unit and the cup unit.
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 or disassembly.
The shafts of the OMC-160 anemometer and the inner side of the cup unit and vane unit are conical.
After removal of the capped nut and washer, it might require a careful tap to loosen the cup unit or vane
unit from its shaft.
3) Disconnect the cable in the junction box.
4) Loose the U-bolts and remove the OMC-160 body from its location.
6.3 Recalibration
If the OMC-160 anemometer is included in a calibration program, the recommended calibration interval is
2 years. If required, you can adjust this interval.
Calibration of wind speed sensor is only possible in a wind tunnel. Observator Instruments B.V. provides
calibration services. For address details see chapter 9. Always include the cup unit and the vane unit
when the OMC-160 anemometer is shipped for recalibration.