Gill Instruments Ltd
7. USING THE ANEMOMETER WITH A PC RUNNING YOUR
SOFTWARE
7.1 Digital Serial Output Format
Data is sent in either binary or ASCII format as follows:
7.1.1 Binary Result Message Format
0xBA 0xBA StaA StaD Wc1H Wc1L Wc2H Wc2L Wc3H Wc3L CH CL TH TL A1H A1L ... AnH
AnL cc
where:
0xBA 0xBA
-
Start of result message identifier. 2 bytes, hex value BA.
StaA
- Status
Address
StaD
- Status
Data
Wc 1
- Wind
component
1
Wc 2
- Wind
component
2
Wc 3
- Wind
component
3
C
- Speed
of
sound
T
- Absolute
temperature
A1
- Analogue
input
1
An
- Analogue
input
n
Cc
-
checksum of all bytes. The checksum is an exclusive OR of all
bytes excluding the 2 start bytes.
These fields are defined as follows:
Wind Component Fields
UVW format Wc1 U axis velocity in 0.01ms-1 units (Two's complement signed)
Wc2 V axis velocity in 0.01ms-1 units (Two's complement signed)
Wc3 W axis velocity in 0.01ms-1 units (Two's complement signed)
Polar format Wc1 U V plane velocity direction in ° relative to N.
Wc2 U V plane velocity magnitude in 0.01ms-1 units.
Wc3 W axis velocity in 0.01ms-1 units (Two's complement signed)
Axis Speeds Wc1 Ultrasonic axis 1 velocity in 0.01ms-1 units (Two's complement
signed)
Wc2 Ultrasonic axis 2 velocity in 0.01ms-1 units (Two's complement
signed)
Wc3 Ultrasonic axis 3 velocity in 0.01ms-1 units (Two's complement
signed)
Speed of Sound Field
Speed Of Sound
Speed of sound in 0.01ms-1 units (Unsigned)
HS-50 Research Anemometer
Page 23
Issue 02
Doc. No. 1199-PS-0032
November 2004
Summary of Contents for HS-50
Page 2: ......
