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User Manual for AML Oceanographic’s Micro SV & P Sensor 

 

4 

1 

INTRODUCTION 

 

This manual describes the AML Oceanographic Micro SVP Sensor.  If additional items 
such  as  sensors  or  software  are  used  in  conjunction  with  the  Micro  SVP  Sensor  the 
manuals  for  these  items  should  also  be  consulted.    Examples  of  additional  manuals 
commonly supplied are: 
 
 

SmartTalk software manual 

 

Transmissometer sensor manual 

 

Dissolved oxygen sensor manual 

 

 

This  manual  covers  the  standard  specifications,  operation,  use,  communication, 
troubleshooting,  and  maintenance  of  the  Micro  SVP  Sensor.    In  addition,  appendices  at 
the  back  of  the  manual  detail  any  unique  configurations  for  the  instrument.    Unique 
configurations include such things as calibration coefficients, additional sensors, custom 
communication formats and custom wiring configurations.  Also included in Appendix G 
is a quick reference guide that describes the basic operating procedures on one sheet for 
ease of use in the field. 
 

1.1 

THE INSTRUMENT 

 

 

 
 
 

The standard Micro SVP Sensor is a two parameter, self contained, intelligent sensor.  The 
basic configuration includes the following: 
 

Sound velocity sensor and electronics 
Pressure sensor and electronics 
Communications electronics 
Data logger electronics 
Waterproof pressure case 
Connector cable 

 

 

Figure 1.1:

 The Micro SVP Sensor 

Содержание Micro SVP

Страница 1: ...User Manual for AML Oceanographic s Micro SV P Sensor Micro SV P Sensor ______________ User s Manual Version 1 1 Oct 2004...

Страница 2: ...e 12 5 1 1 3 Raw Output Mode 13 5 1 2 Command Summary 13 5 1 3 Advanced Commands 16 5 1 3 1 Display Commands 16 5 1 3 2 Set Commands 16 5 1 3 3 Set Scan Options 19 5 1 3 4 Analog Board Commands 20 5 1...

Страница 3: ...e Micro SVP 34 7 2 2 Recommended Battery Rating for the Micro SVP 34 7 2 3 Battery Dimensions 34 7 2 4 Voltage Capacity 34 7 2 5 Current Capacity 34 7 2 6 Maximum Current Sourcing Capabilities 35 8 CA...

Страница 4: ...Sensor In addition appendices at the back of the manual detail any unique configurations for the instrument Unique configurations include such things as calibration coefficients additional sensors cu...

Страница 5: ...ommunicate with the sensors and communications interface board The communications interface board is normally an RS 232C board Optional communication boards include RS 485 and TTL Through the communic...

Страница 6: ...to 38400 8 data bits no parity 1 stop bit Data type ASCII text Optional RS 485 autobaud communications Baud rate 2400 to 38400 baud 8 data no parity 1 stop bit Data type Addressable binary network fo...

Страница 7: ...to 60 C 40 to 140 F Connectors Bulkhead connector IMPULSEtm MCBH 8FS with 24 AWG Dummy plug IMPULSEtm MCDC 8 MP Shorting plug IMPULSEtm MCDC 8 MP S pins 6 and 7 are shorted molded red Com cable conne...

Страница 8: ...ity and pressure sensors incorporate thermal compensation The output voltage must be converted to a digital signal raw output and then the calibration coefficients must be applied to calculate the out...

Страница 9: ...device An AML supplied data cable will link the two Refer to the wiring diagram in Appendix C At one end of the cable is a DB25 or DB9 female connector that plugs into the computer s serial port and...

Страница 10: ...er on to the instrument Power for the Micro SVP sensor is turned off if the there is no shorting plug or data power cable plugged in to the battery pack Figure 4 3 2 Micro instrument with battery pack...

Страница 11: ...rument is connected set the communications format to 8 bits no parity 1 stop bit and select a baud rate between 2400 and 38400 baud Apply power to the instrument and press the enter key The standard M...

Страница 12: ...ternal computer The instrument automatically determines the baud rate and configures itself to match The instrument then responds with the header information The header identifies the sensor type firm...

Страница 13: ...ommands are in the form of standard English words Commands can be entered in upper or lower case letters followed by an ENTER The minimum letters of the command that the instrument will recognize are...

Страница 14: ...This sets the sample rate at the maximum of 25 scans per second Command SET INCREMENT INC This command sets the pressure increment that the Micro SVP uses when logging data Units are in dBars Note dB...

Страница 15: ...e Example DIS S sample rate is 1 seconds Command DIS INC This will display the current pressure increment setting Command DUMP This command dumps the instrument s logged data from memory The data will...

Страница 16: ...eout is disabled Startup delay is 0 Header is displayed Start up in prompt mode Characters reception is enabled Command DIS MEMORY D M This command will display the current memory status Example dis m...

Страница 17: ...Micro SVP will try to determine the baud rate when the enter key is pressed before it defaults to the baud rate set by the value of b If a 0 the Micro SVP will not auto baud and will default to the b...

Страница 18: ...age return key and power up the unit then from the prompt issue the SET RXON command Command SET RXON Enable reception of characters at the next power up Command SET TIMEOUT nn SE T nn Where nn is tim...

Страница 19: ...set scan delay 200 sets the scan delay to 4 seconds In the above example the Micro SVP would power up the sensor boards wait 4 seconds then take a scan of data Micro SVP power up timing diagram Comma...

Страница 20: ...ALOG 1 SE A 1 This command will enable the displaying of analog channel 1 when the analog board has been enabled with the SET ANALOGON command Analog channel 2 data will not be displayed or logged Com...

Страница 21: ...he Micro SVP to output data at power up with a baud rate of 9600 set detect 05 disable the auto baud and default to 9600 baud at power up set startup noheader do not display a header at power up set s...

Страница 22: ...he prompt mode 5 1 3 6 Accessing the Calibration Coefficients Refer to Section 8 and Appendices A and B for more information The instruments calibration coefficients are stored in the Micro SVP s memo...

Страница 23: ...ode Press the ctrl key and the c key at the same time 5 1 3 7 Editing the Calibration Coefficients The instruments calibration coefficients are stored in the Micro SVP s memory Accessing the coefficie...

Страница 24: ...alk mode with the Pressure and Temperature board Entering talk mode Pressure and Temperature Micro Sensor V1 30 SN 0001 PT set pa 1 234567E 00 set the a coefficient dis c display the calibration coeff...

Страница 25: ...de with the analog board Entering talk mode Analog Micro Sensor V1 30 SN 0003 A set 1a 1 set the a coefficient of channel 1 set 2a 2 set the a coefficient of channel 2 dis c display the calibration co...

Страница 26: ...Micro SVP Sensor will not log data into its memory unless the instrument s SV sensor detects that it is in water and the shorting plug is inserted into the battery pack 5 1 4 Using Integrated System...

Страница 27: ...bit and the desired baud rate Power the instrument and then press enter The instrument will respond with an identification header and then a prompt Commands can then be sent to the instrument as desir...

Страница 28: ...use errors in the data To avoid bubbles on the transducer face tilt the sensor slightly when immersing the unit in the water 6 1 2 Pressure Sensor Precautions Though the pressure sensor can survive pr...

Страница 29: ...d velocity sensor are AC coupled to the water to reduce low frequency electrical noise in the environment High frequency electrical noise can sometimes cause errors in the data 6 2 2 Acoustic Interfer...

Страница 30: ...C Electrical Wiring Diagram The serial port chosen is incorrect Most IBM computers have only one serial port therefore the user should choose the COM1 setting However if a COM2 port exists the user m...

Страница 31: ...nsor readings are noisy Solutions There are nearby electromagnetic noise sources Move the instrument to a new location or move the noise source Refer to section 6 2 If only one sensor reading is noisy...

Страница 32: ...ange of the sensor may have been exceeded The pressure sensor may require re calibration or replacement Contact the factory for support The pressure sensor is faulty Examine the stainless steel diaphr...

Страница 33: ...please refer to Appendix C Figure 7 2 Battery compartment Note The end cap contains o rings Take care to avoid scratching or getting dirt on the o ring surfaces Wipe dry the battery pack if it is wet...

Страница 34: ...when considering a replacement lithium battery for the Micro SVP 7 2 3 Battery Dimensions Due to the space constraints of the Micro SVP battery assembly close attention to the battery size must be ob...

Страница 35: ...lithium battery defines how much current the battery can source before its voltage will drop significantly Batteries with a low rating of Maximum recommended continuous currents below 800ma may produc...

Страница 36: ...e fitting algorithm to produce calibration coefficients Each set of coefficients are permanently stored in the instrument s memory Calibration coefficients are not interchangeable Each set is unique t...

Страница 37: ...ed personnel This warranty is the only warranty given by AML Oceanographic No warranties implied by law including but not limited to the implied warranties of merchantability and fitness for a particu...

Страница 38: ...User Manual for AML Oceanographic s Micro SV P Sensor APPENDIX A Drawings...

Страница 39: ...User Manual for AML Oceanographic s Micro SV P Sensor 39...

Страница 40: ...AL Connect the Micro SVP Sensor to the data cable Connect the data cable to the serial port of the computer If the Micro SVP Sensor is externally powered connect the data cable power leads to a 12 vol...

Страница 41: ...raphic Once the prompt appears the Micro SVP Sensor is ready to accept instructions Refer to the RS 232 Command Summary section 5 1 2 Caution Some versions of Hyperterminal have a bug which does not a...

Страница 42: ...User Manual for AML Oceanographic s Micro SV P Sensor 42...

Страница 43: ...the correct port and apply the following settings 8 bits no parity 1 stop bit Select the desired baud rate Select the desired sampling rate and logging rate Select the connect command Smart talk will...

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