Instruction manual

CSAT3 THREE DIMENSIONAL SONIC ANEMOMETER
2
DIGITAL RS-232:
Baud rate: 9600
Data type: 2-byte integer
SDM AND RS-232 DIGITAL
RANGE AND RESOLUTION:
Full scale wind: ±65.535 m s
-1
autoranging
between four ranges; least significant bit
is 0.25 to 2 mm s
-1
.
Speed of sound: 300 to 366 m s
-1
(-50° to
+60°C); least significant bit is 1 mm s
-1
(0.002°C).
ANALOG:
Number of outputs: 4
Voltage range: ±5 V
Resolution: 2.4 mV
ANALOG RANGE AND RESOLUTION:
Full scale wind: User selectable for u
x
and
u
y
; ±32.768 m s
-1
(low range), least
significant bit is 15 mm s
-1
or ±65.536 m
s
-1
(high range), least significant bit is
30 mm s
-1
; u
z
is ±8.192 m s
-1
, least
significant bit is 4 mm s
-1
.
Speed of sound: 300 to 366 m s
-1
(-50° to
+60°C); least significant bit is 16 mm s
-1
(0.026°C).
PHYSICAL DESCRIPTION
MEASUREMENT PATH LENGTH: 10.0 cm
vertical; 5.8 cm horizontal
TRANSDUCER PATH ANGLE FROM
HORIZONTAL: 60 degrees
TRANSDUCER: 0.64 cm (0.25 in) diameter
TRANSDUCER MOUNTING ARMS: 0.84 cm
(.33 in) diameter
SUPPORT ARMS: 1.59 cm (0.63 in) diameter
DIMENSIONS:
Anemometer Head:
47.3 cm (l) x 42.4 cm (h)
(18.6 in x 16.7 in)
Electronics Box: 26 cm x 16 cm x 9 cm
(10.2 in x 6.3 in x 3.5 in)
Carrying Case:
71.1 cm x 58.4 cm x 33 cm
(28 in x 23 in 13 in)
WEIGHT:
Anemometer Head: 1.7 kg (3.7 lb)
Electronics Box: 2.8 kg (6.1 lb)
Shipping: 16.8 kg (37 lb)
OPERATING TEMPERATURE RANGE
-30° to +50°C
POWER REQUIREMENTS
VOLTAGE SUPPLY: 10 to 16 VDC
CURRENT:
200 mA @ 60 Hz measurement rate
100 mA @ 20 Hz measurement rate
3. INITIAL SETUP
3.1 FACTORY SETTINGS
• Analog Outputs - Off
• Execution Parameter - 10 Hz (see Section 8
and B.1)
• Trigger Source - Internal Clock (see Section
8, 9, and B.1)
• SDM Address - 3 (see Section 3.2, 6.1, and
10.1)
• Unprompted Output - Off
The above settings can be changed with a PC,
running the Windows CSAT3 monitor software, and
the RS-232 cable.
3.2 SDM ADDRESS
Each CSAT3 on the SDM bus must have a
unique address. A hex thumb switch within the
electronics box is used to change the SDM
address. Remove the lid and orient the
electronics box with the connectors pointing
down. The hex thumb switch is now located in
the lower right hand side of the electronics box
(see Table 3-1 for SDM addresses).
CAUTION: SDM address F (hex) is a
special address used during a Group
Trigger. Do not set the hex thumb switch to
SDM address F on the CSAT3’s CPU
board.