Observator OMC-160-3 User Manual
OMC-160-3
OMC-160-3 Anemometer
Manual
Version 3.2 - November 2017
Author: Observator Instruments
OMC-160-3 Manual Page 2
Revisions:
2.04 (November 2013) previous versions OMC-160-2
3.0 (May 2017) OMC-160-3 introduction
3.1 (August 2017) OMC-160-3 reviewed manual
3.2 (November 2017) Update specifictions
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Index
1 Introduction ........................................................................................................................................... 5
2 Safety .................................................................................................................................................... 6
3 Description ............................................................................................................................................ 7
3.1 General description ..................................................................................................................... 7
3.2 Main parts ................................................................................................................................... 7
3.3 Moving parts ............................................................................................................................... 7
3.4 Theory of Operation .................................................................................................................... 7
3.5 Conditions of use. ....................................................................................................................... 7
3.6 Field use examples ..................................................................................................................... 8
4 Installation ............................................................................................................................................. 8
4.1 Unpacking ................................................................................................................................... 8
4.2 Location of the sensor ................................................................................................................ 8
4.3 Site preparation .......................................................................................................................... 9
4.4 Mounting / mechanical installation .............................................................................................. 9
4.5 Assembly of cup and vane .......................................................................................................... 9
4.6 Electrical installation ................................................................................................................. 11
4.6.1 Connections .......................................................................................................................... 11
4.6.2 Alignment LED’s ................................................................................................................... 12
4.6.3 Status LED’s ......................................................................................................................... 12
5 Commissioning ................................................................................................................................... 13
5.1 Commissioning procedure ........................................................................................................ 13
5.1.1 Alignment of the wind vane .................................................................................................. 13
6 Maintenance ....................................................................................................................................... 15
6.1 Maintenance schedule (preventive maintenance) .................................................................... 15
6.2 Removing the OMC-160 anemometer from its location ........................................................... 15
6.3 Recalibration ............................................................................................................................. 15
6.4 Opening and closing the anemometer ...................................................................................... 16
6.5 Replacement of ball bearings and sensor PCB’s ..................................................................... 16
7 Data protocol ....................................................................................................................................... 19
7.1 General ..................................................................................................................................... 19
7.2 Baudrate ................................................................................................................................... 19
7.3 Messages.................................................................................................................................. 19
8 Specifications ...................................................................................................................................... 20
8.1 Specifications ............................................................................................................................ 20
9 Support, service and warranty ............................................................................................................ 21
10 Handling, transportation and storage .............................................................................................. 22
10.1 Handling .................................................................................................................................... 22
10.2 Long term storage ..................................................................................................................... 22
10.3 Reshipping the instrument ........................................................................................................ 22
11 Advanced configuration ................................................................................................................... 23
12 Dimensional Drawing ...................................................................................................................... 24
13 EU Declaration of Conformity .......................................................................................................... 25
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1 Introduction
The Observator OMC-160-3 is the 3rd generation of this popular anemometer.
The sensor is often mounted in harsh conditions of the marine and offshore environment and it has
proven to be robust and reliable over the years. The OMC-160-3 continues the robust build quality
improved with the latest technology, which will make it even more reliable and easier to commission.
This manual is intended for the engineer doing the installation and commissioning and can also be used
as reference for the operator.
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2 Safety
For correct functioning the Observator OMC-160 Anemometer
must be installed and commissioned according installation &
commissioning instructions by a qualified engineer.
The Observator OMC-160 Anemometer has moving parts, which
can rotate fast during strong winds.
Keep clear of the cup and vane during strong winds!
The Observator OMC-160 Anemometer is usually installed at
height.
Technicians maintaining the system need to be qualified to work
at those heights whenever applicable!
Remember: instruments are tools.
They do NOT replace your own observations!
After end of life dispose this product according local regulations
or return to manufacturer.
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3 Description
3.1 General description
The Observator OMC-160-3 is a combined wind speed and direction meter using high accurate noncontact sensors. It uses a rotary cup with 3 cups for speed and a stainless steel balanced vane for
direction measurement. It has a NMEA output signal and be combined with all Observator display and
MeteoLlink systems.
3.2 Main parts
The OMC-160 anemometer consists of a sensor body and a mounting bracket. Note that the mounting
bracket, though it was sometimes referred to as OMC-167, is an integral part of the OMC-160
anemometer. The mounting bracket has a mast clamp for mechanical connection and a junction box for
electrical connection. This clamp is designed for mounting on a vertical pipe end.
3.3 Moving parts
The only moving parts are the cup unit and the vane unit. The vane unit is mounted on top of the sensor
body, and the cup unit is mounted at the bottom of the sensor body. Both the cup unit and the vane unit
are wind driven. The wind speed sensor is a rotary cup type unit manufactured in stainless steel and
polycarbonate. The three cups are cone shaped for optimum response to varying winds. The vane unit is
made in stainless steel.
3.4 Theory of Operation
The OMC-160 is a cup and vane anemometer. Cup and vane anemometers are the most common
instrumentation for measurement of wind speed and direction. Cup and vane anemometers are the
primary sensors for wind measurement used by the leading meteorological services all over the world.
Therefore the readings of the OMC-160 anemometer are inter-comparable with the readings of other cup
and vane anemometers without any conversions.
For a more comprehensive discussion on the measurement principle please refer to Chapter 5 of the
WMO CIMO guide1
3.5 Conditions of use.
The OMC-160 anemometer is built to provide reliable measurement results under all weather conditions.
Rain, snow, or other kinds of precipitation do not affect the readings. Further, the OMC-160 anemometer
is insensitive to noise, extreme temperatures, solar radiation, etc.
1
Guide to Meteorological Instruments and Methods of Observation, WMO No. 8, 7th Edition, World Meteorological
Organisation, Geneva, Switzerland, ISBN 92-63-16008-2
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3.6 Field use examples
4 Installation
4.1 Unpacking
The scope of supply of the OMC-160 anemometer consists of a Styrofoam and cardboard box
containing:
sensor body with integral mounting arm
cup unit
vane unit
U-bolts
mounting materials
this manual (on CD)
Note that additional materials that were simultaneously ordered for the same order might be packed in
the OMC-160 box.
4.2 Location of the sensor
Ensure that the OMC-160 anemometer will be mounted on a location where the wind that is free from
turbulence e.g. caused by obstacles nearby. Plan the OMC-160 anemometer in a free area as far as
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