miniSVS
Page 4
© 2017 Valeport Ltd
2. Sensors
2.1. Specifications
2.1.1. Power
·
Requires 8 – 29V DC input
·
miniSVS draws approximately 17mA at 12V DC
·
miniSVS with pressure draws approximately 24mA at 12V DC
·
miniSVS with temperature draws approximately 20mA at 12V DC
2.1.2. Data Output
Units are fitted with both RS232 and RS485 communications as standard. RS485 is
enabled by grounding a pin in the communications lead (refer to Section 4). Protocol is 8
data bits, 1 stop bit, no parity, no flow control.
Baud rate is factory set to 19200. User may choose between 2400, 4800, 9600, 19200,
38400, 57600 or 115200. (Note that fast data rates may not be possible with low baud
rates).
2.1.3. Signal Frequency
Single sound pulse of 2.5MHz frequency.
2.1.4. Update Rate
Selected by command – Single output or continuous output at one of the following rates:
1Hz, 2Hz, 4Hz, 8Hz ,16Hz, 32 Hz or 60Hz
The fastest rate possible is determined by the combination of sensors fitted:
SV only
SV + P
SV + T
Max Data Rate:
60Hz
32Hz
16Hz
2.1.5. Performance
Sensor
Resolution
Range
Overall Accuracy
25mm
0.001m/sec
1375 – 1900m/s
±0.020 m/s
50mm
0.001m/sec
1375 – 1900m/s
±0.019 m/s
100mm
0.001m/sec
1375 – 1900m/s
±0.017 m/s
Pressure
0.01% FS
0 to 100, 500, 1000 or
6000 dBar
±0.05%FS
(over -10°C to 40°C)
Temp.
0.001°C
-5 to +35°C
(others available)
±0.01°C
