Casella CEL Multimet - Manual (Page 7)

An optional mast mount kit enables the sensor to be fitted to circular
masts up to 50 mm in diameter.
The wind direction sensor is factory set to point North when the
cross arm supporting the sensors is aligned on a north - south axis.
Rotate the sensor head cross arm until the red “N” mark on the
direction sensor (weather vane) is pointing directly north. Use a compass to
confirm that the sensor head cross bar is now running due north - south.
Once the cross arm is correctly aligned, clamp the extension tube securely in
place.
The sensor arm should be fitted to the pre-wired connector. Ensure
the connector is fully tightened to maintain prevent the ingress of water.
Sensors are supplied with a 25 m length of cable as standard
pre-wired to a 5-way plug. Wiring details are as follows:
Sensor Connector Plug Wiring Details
5-way “Binder 680 series” plug fitted to end of sensor
cable (View of plug solder buckets)
Function Pin
Number
Wire Colours
(Standard 25 m length)
Wire Colours
(Extended length)
Sensor Positive Supply 1 Brown White / Red
Sensor Ground 3 Black+Screen Black+Green+Screen
NMEA Digital Data Output 5 Blue Blue
Power Supply
The Multimet system is delivered with a 12 VDC power supply that accepts
mains input voltages between 90 and 260 VAC, and may be used throughout
the world. For cable lengths less than 200 m, the sensors are powered
directly from the display’s power supply. For extended distances, a power
supply located at the sensor position may be required. Details of any
non-standard system configurations will be provided in a supplement to this
handbook.
1.2.3 RS232 Socket
The RS232 serial communications socket is used to transfer recorded or real
time data to a connected P.C. The system is delivered with a 9-way to 9-way’
serial cable which is used to connect the Multimet RS232 socket to a free
serial port on the P.C.
RS232 Socket (9 way ‘D’ type male) pinout
Function Pin Number
Multimet RS232 Transmit Out 3
Multimet RS232 Receive in 2
Supply Ground 5
2
1
02073
5
4
3
Installation
Page 7 of 16
MULTIMET Wind Speed and Direction System
& OnlinePro Software - Users Handbook