Gill Instruments Ltd
Sonic Temperature
Sonic temperature in 0.01K (Unsigned) or 0.01°C (Two's
complement
signed)
Absolute Temperature Field
Absolute Temperature in 0.01K (Unsigned) or 0.01°C (Two's complement signed)
Analogue Input Fields
Analogue input value in twos complement:
0000 0.0000V
1FFF +4.9994V
E000 -5.0000V
Checksum Field
Exclusive OR of all bytes excluding the two start bytes.
7.1.2 ASCII Result Message Format
<STX>StaA, StaD,Wc1,Wc2,Wc3,C,T,A1,...,An,<ETX>cc<TERM>
where:
<STX>
-
Start of string character (ASCII value 2)
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.
<ETX>
-
End of string character (ASCII value 3)
cc
-
checksum of all characters between <STX> and <ETX>
<TERM>
-
<CR> or <CR><LF>, user selectable
These fields are defined as follows:
Wind Component Fields
UVW format Wc1 U axis velocity in 0.01ms-1 units (±UU.UU)
Wc2 V axis velocity in 0.01ms-1 units (±VV.VV)
Wc3 W axis velocity in 0.01ms-1 units (±WW.WW)
Polar format Wc1 U V plane velocity direction in ° relative to N (DDD)
Wc2 U V plane velocity magnitude in 0.01ms-1 units (MM.MM)
Wc3 W axis velocity in 0.01ms-1 units.(±WW.WW)
Axis Speeds Wc1 Ultrasonic axis 1 velocity in 0.01ms-1 units (±A1A1.A1A1)
Wc2 Ultrasonic axis 2 velocity in 0.01ms-1 units (±A2A2.A2A2)
HS-50 Research Anemometer
Page 24
Issue 02
Doc. No. 1199-PS-0032
November 2004
Summary of Contents for HS-50
Page 2: ......
