User manual

MetPak Doc No 1575-PS-0001 Issue 02 CN 4240 March 2006
9.6 Analogue settings
The following commands are only valid for the MetPak Options 4 and 6
Item Options Command
Voltage or Current
output
0 - 5 Volt
4 – 20 mA
T1
T2
Analogue
range
0 – 30 metres per second
0 – 50 metres per second
0 – 60 metres per second
Analogue output disabled
S3
S5
S6
S9
Analogue
Wraparound
Wrap around 0 – 539°
Normal 0 - 359°
C1
C2
Where:
Analogue range = Customer selected range
Analogue wraparound = Chart recorder facility
Voltage or current output = Output type
Polar mode direction calculation
The system will not calculate a wind direction when the measured velocity falls below 0.05m/s. When configured for
fixed field mode the direction output will hold the last setting until a new direction can be calculated. If the unit is in
CSV mode, the output will switch between 0 and 5V (or 4 to 20mA) at the output rate selected.
Magnitude scaling
The magnitude output can be scaled such that the full scale output represents either 30, 50 or 60ms
-1
.
Error conditions
If a valid wind measurement cannot be calculated (for example all paths blocked), the outputs 1 and 2 will switch
between 0 and 5V ( or 4 to 20mA) at the output rate selected.
Disabled outputs
If the analogue outputs are not required, they can be disabled (Command S9).
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