Gill Instruments Ltd
Intrinsically Safe WindObserver Anemometer
Page 38
Issue 10
Doc. No. 1360-PS-0001
May 2015
G Command Averaging.
Using the G Command in association with modes other than M14, M15 and polled
modes.
The Averaging Period can be set from zero to 3600 secs. (1 hour). The default setting is
zero
.
When averaging is enabled, data is output at a rate determined by the averaging
period. The data is an average of valid data collected during the averaging period.
If G is set to zero then averaging settings will be disabled.
For instance if the unit is set for G0025 then every 25 seconds there will be a single result
output that provides the average of the wind direction and magnitude data over the last 25
seconds.
A,219,000.78,M,0
0, 0D
A,202,000.79,M,0
0, 06
A,207,001.22,M,0
0, 0C
A,220,000.48,M,0
0, 04
Low Wind Speed Condition (Less than 0.05m/s)
If wind speed is below 0.05m/s then the direction parameter in ASCII modes will remain
blank in CSV mode and in fixed field mode the direction parameter will freeze at the last
valid direction reading. All other parameters will update at the output rate.
Checksum
The checksum is the EXCLUSIVE OR of the 8 data bits of each character between and
excluding <STX> and <ETX>. The HEX value of the most significant and least
significant four bits of the result are converted to 2 ASCII characters for transmission.
1)
If the anemometer detects a checksum error in the non-volatile memory, the following
ASCII string is output in place of the normal output:
**NO CONFIGURATION DATA**<CR><LF>.
2)
In fixed field mode an error will result in value +99.999 for UV and Magnitude and
999 for direction being reported.
45
Offset
If required, the U axis can be 45
to the transducer axis.
Vertical Output Padding
Inserts a dummy W vector to simulate a 3 axis output reading.
