Valeport miniSVS Operating Manual Download Page 6 | Manualshive

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miniSVS

Page 6

© 2017 Valeport Ltd

2.2.1. Dimensions

Dependent on type supplied. See diagram below

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Summary of Contents for miniSVS

Page 1: ...d in any material form either wholly or in part and the contents of this document and any method or technique available therefrom must not be disclosed to any other person whatsoever without the prior...

Page 2: ...s 5 2 2 Physical Characteristics 7 3 Communications 7 3 1 Sampling Modes 7 3 2 Data Formats 11 3 3 Wiring Information 18 4 Operations 18 4 1 Power Up 18 4 2 Stop Command 18 4 3 Command Echoes 18 4 4 P...

Page 3: ...g a ceramic transducer a signal reflector and spacer rods to control the path length The two are connected by a single coaxial cable A titanium housing may be fitted which provides waterproof protecti...

Page 4: ...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 Sel...

Page 5: ...uracy that can be achieved It has been found that a signal stability of 2mm sec can be achieved with a sensor path length of 25mm overall 50mm path for reflected signal falling to 1 7mm sec for a 100m...

Page 6: ...miniSVS Page 6 2017 Valeport Ltd 2 2 1 Dimensions Dependent on type supplied See diagram below...

Page 7: ...s at 8 Hz M16 enter Unit free runs at 16Hz M32 enter Unit free runs at 32Hz M60 enter Unit free runs at 60Hz 3 2 Data Formats Data output is dependent on the parameters fitted to the miniSVS and the o...

Page 8: ...per second to 2 decimal places SV only space 1234 56 cr lf where 1234 56 is the speed of sound in m s P SV space pressure space 1234 56 cr lf where 1234 56 is the speed of sound in m s T SV space tem...

Page 9: ...ode TTT TTTT CC CCCCC PPPPP PPPP SSSS SSSS VVVVV VVV cr lf This format mimics the Seabird CTD output format where TTT TTTT is temperature value CC CCCCC is conductivity value PPPPP PPPP is the pressur...

Page 10: ...ace tt ttt space cr lf Where pppp p denotes pressure depth ssss ss denotes speed of sound tt ttt denotes temperature In this format the miniSVS will substitute zeroes for parameters it cannot measure...

Page 11: ...nections Internal Co axial connector to sensor J3 5 way FCI power and comms J1 NB J2 J4 are for Valeport calibration and setup purposes not for use by customer External Standard is SubConn type MCBH6F...

Page 12: ...en V Red Plug Red linked to Green inside D type 5 Orange Link to Pin 1 for RS485 N C for RS232 6 Link to pin 1 in sensor Blue Power GND Black Plug Black linked to Brown inside D type Alternatively sys...

Page 13: ...r 1 Green RS232 Rx in to sensor RS485A 2 Yellow Power RS232 Ground 3 Blue 9 28V DC input 4 Red RS232 Tx out of sensor RS485B 5 N C 6 N C NB RS232 and Power grounds must be linked Impulse 6 pin female...

Page 14: ...ector optional fit only Systems are supplied with a free end lead for splicing Impulse MHDG 5 BCR Function Free End Pin Wire Colour Wire 1 Green RS232 Ground Screen 2 2 White Black RS232 TX out of sen...

Page 15: ...4mm Banana Plugs Pin Pin Pin Wire colour 1 V Red Plug Red 2 V Black Plug Black 3 4 5 6 RS232 RX In to SVS 3 7 RS232 TX Out of SVS 2 8 RS232 GND 5 Link to 1 6 8 9 139 IPS Extension Cable 10m Valeport...

Page 16: ...ted Internal RS485 configuration or as an optional setting externally to the instrument 3 3 6 1 Internal RS485 Pins 2 and 5 are linked inside the instrument Systems are supplied with a short 50cm lead...

Page 17: ...mm Banana Plugs Pin Wire Colour Pin Pin Wire Colour 2 WHITE V Join BLACK WHITE wires in the hood Black 4mm plug BLACK 3 RED V Join RED RED wires in the hood Red 4mm plug RED 4 GREEN RS232 Rx into sens...

Page 18: ...command 4 3 Command Echoes Each command character is immediately echoed back Enter is echoed back as cr lf 4 4 Pressure Format Commands 083 0 Turns pressure sensor off and unit reverts to SV only oper...

Page 19: ...to raw format time of flight in 100ths of nanoseconds 031 cal Sets data output to calibrated format sound velocity in mm sec Unit always starts in cal mode from power on 001 nn Sets RS485 address 01...

Page 20: ...e inherent errors that are accepted as being at best 0 25m s we use a different formula to calibrate the sensor Del Grosso also published a formula for speed of sound in pure water with Mader 1972 whi...

Page 21: ...returning sound pulse within the expected time frame a time frame that equates to 1375 1900m s in terms of sound velocity The most common occurrence of a zero value is when the sensor is in air but it...

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