Gill Instruments Ltd
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WindObserver 65
Page 43
Issue 4
Doc. No. 1390-PS-0039
June 2016
7.12.
Analogue outputs and options
Analogue outputs are available as an option on the WindObserver 65.
See Section 6.5 for connection details, and Section 8.5 for configuring the
analogue outputs.
Output modes
There are three analogue output channels which can be configured as either voltage (0 to
5v, or
2.5v)
,
or current outputs (4 to 20mA). They are available simultaneously with the
digital outputs.
Channel outputs
The signals on the Channel outputs 1 and 2 are dependent on the Output format chosen.
The signal on Channel 3 can be configured for either Status or Temperature.
Output format
Channel 1
Channel 2
Channel 3
UV (M1, M3, or M7 (Binary))
U
V
Status
or Temperature
Polar
(
M2
, M4, or M8 (Binary))
Magnitude
Direction
NMEA (M5)
Magnitude
Direction
Binary Tunnel (M6)
U Speed
U direction
Tunnel (M12)
U Speed
U Direction
Tunnel (M13)
U Speed
U Direction
Polar (M14, M15)
Magnitude
Direction
Status
Status
If channel 3 is configured for Status, the output will be 0v (or 4mA) if the unit is in an OK
condition. In a fault condition, error code 01, 02, or 04, the output will be +5v (or 0mA).
See Section 10.5 for the list of Error Codes.
Temperature
If channel 3 is configured for Temperature, it reports the temperature if it is between –40
and +70
C, scaled from +0.7V to +5V (6.25mA to 20mA). Temperatures outside this
range are reported as errors by setting the output to 0V (4mA).
Tunnel mode
In Tunnel mode, Channel 1 represents the Wind Speed along the U Axis, Channel 2 gives
the direction of the wind along the U axis, where a –U vector (=wind from the ‘N’
direction) is represented by 0v (or 4mA), and a +U vector (=wind from the ‘S’ direction)
by 5v (or 20mA).
Scaling
All analogue outputs are in m/s irrespective of the digital units of measurement setting and
can be scaled to have a full-scale deflection of
10 to
70 units using the Z command.
In Polar mode the
sign should be ignored. Only the + sign is effective.
In all cases zero Wind Speed is represented by 0V or 4mA.
Averaging
Analogue Outputs are not averaged when using the G command.
Analogue Outputs are averaged in Modes M14 and M15 (but no Gust Output).