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Bringing the Benefits of Real-Time Data Collection to the World

Sutron Corporation, 22400 Davis Drive, Sterling, Virginia 20164-4444

Table of Contents

Introduction....................................................................................................................... 3

Quick Start ....................................................................................................................... 4

Cabling ............................................................................................................................. 5

Sutron-Supplied Cable.............................................................................................................. 5

Terminal Strip .......................................................................................................................... 5

SDI-12 Wiring .......................................................................................................................... 6

RS-232 Wiring ......................................................................................................................... 6

Analog Wiring .......................................................................................................................... 7

Setup and Operation ........................................................................................................ 8

Introduction .............................................................................................................................. 8

Nomenclature ........................................................................................................................... 8

Setting the Address ................................................................................................................... 8

Using Switches to Set the Address ............................................................................. 9

Using a command to Set the Address ......................................................................... 9

Verifying the Address and Operation ....................................................................................... 10

Commands (Overview) ............................................................................................................. 11

Making a Measurement ............................................................................................................ 12

Selecting a measurement command class ................................................................... 12

Always supported ......................................................................................... 12

Multiple long measurement time sensors ..................................................... 12

Improved data integrity checking ................................................................. 12

Making a non-concurrent Measurement (M command) ............................................. 12

Making a Concurrent Measurement (C command) .................................................... 14

Making a non-concurrent Measurement with CRC-16 (MC command)..................... 15

Making a Concurrent Measurement with CRC-16 (CC command) ............................ 16

Other Measurements .................................................................................................. 18

Changing the Units ..................................................................................................... 18

Setting User Units ...................................................................................................... 19

Setting Station Elevation ............................................................................................ 19

Analog Output Range ................................................................................................. 20

Converting Voltage to Pressure .................................................................................. 21

Configuring the Operating Mode and Averaging Time ............................................................ 22

Setting the Operating Mode ....................................................................................... 22

Setting the Averaging Time........................................................................................ 22

Resetting the unit to Factory Default Configuration ................................................................. 23

Command Reference ....................................................................................................... 24

Accubar Basic SDI-12 Commands ........................................................................................... 24

Accubar Extended Commands ................................................................................................. 33

Additional commands for Analog output units (-2) .................................................................. 36

Installation ........................................................................................................................ 37

Calibration ........................................................................................................................ 38

Factory Calibration ................................................................................................................... 38

Metrology Lab Calibration ....................................................................................................... 38

Troubleshooting and Maintenance ................................................................................... 40

Содержание ACCUBAR 5600-0120-1

Страница 1: ...sutronwin tw page 1 GS 25F604D SBSA ISO 9001 2008 Certified 703 406 2801 Fax Sutron is an authorized IridiumValue Added Reseller VAR 3 22 2011 SUTRON ACCUBAR BAROMETRIC PRESSURE MULTIPLE INTERFACE SEN...

Страница 2: ...oved data integrity checking 12 Making a non concurrent Measurement M command 12 Making a Concurrent Measurement C command 14 Making a non concurrent Measurement with CRC 16 MC command 15 Making a Con...

Страница 3: ...easure Break detect time 40 Test Analog output 41 Maintenance 41 9 Specifications for 5600 0120 Barometric ACCUBAR 42 Appendix A Introduction to Pressure Measurement 44 Appendix B Sutron Customer Serv...

Страница 4: ...range of applications low power consumption 1 standby power is 0 2mA average power when taking measurements every 15 minutes via SDI 12 is less than 0 25 mA high accuracy 0 5 mB hPa full temperature...

Страница 5: ...e ACCUBAR with the 8200 follow these simple steps Connect the sensor to your Sutron 8200 Data Logger SDI 12 port on the front panel of the 8200 using the factory supplied cable Use the 8200 SYSTEM SET...

Страница 6: ...6 Red Black 1 DTR 7 Green Orange 4 Analog Out 8 Purple Green 6 Analog Out 9 White Violet 8 Analog output is only available on 2 versions of the ACCUBAR Terminal Strip The ACCUBAR has a terminal strip...

Страница 7: ...connections to PC Description J5 Terminal IBM AT Connection DB 9F cable IBM PC or any DTE Connection DB 25 F cable Ground 1 5 7 Receive Data 2 3 2 Transmit Data 3 2 3 Battery 4 Supply Voltage Supply...

Страница 8: ...k inside the ACCUBAR Description J5 terminal Connection Battery 4 Connect to Battery or data recorder supplied voltage Ground 5 Connect to Battery or data recorder ground Analog out 8 Connect to Analo...

Страница 9: ...Follow the instructions in Section 3 in order to make these connections Nomenclature All commands have three components the device address the command body and the command termination The device addre...

Страница 10: ...5 to 8 are set ON Using a command to Set the Address In order to set the address by SDI 12 command or RS 232 command the DIP switch address must be set to 0 Switches 1 2 3 4 OFF This is the factory se...

Страница 11: ...lid i e there is a typing mistake in the command or the two copies of the new address do not match As an example the following command would set the ACCUBAR address to 5 0XAD5A5 Subsequently the addre...

Страница 12: ...igits including a decimal point The commands are in ASCII and all the replies use printable ASCII characters followed by CR LF The ACCUBAR replies to all SDI commands it supports If the ACCUBAR receiv...

Страница 13: ...Version V1 9 and before only support the M commands Selecting a measurement command class Always supported The first requirement is that the data recorder support the command All SDI 12 data recorders...

Страница 14: ...h v and u have the format of a polarity or sign followed by up to seven digits including a decimal point One example of a response would be 0 1013 25 0 The u indicates the units of the measurement Whe...

Страница 15: ...and yourself In reply the sensor will respond with attt02 Acknowledging it is address a and indicating that after ttt seconds are allowed for the measurement 2 values can be collected When the measure...

Страница 16: ...me up with the final value Making a non concurrent Measurement with CRC 16 MC command The command to tell the ACCUBAR to make a non concurrent measurement with a CRC 16 check on the data is aMC where...

Страница 17: ...u will be returned 10 units are mB station elevation offset 11 units are Hg station elevation offset 12 units are kPa station elevation offset 13 units are mmHg station elevation offset 14 units are A...

Страница 18: ...u indicates the units of the measurement When u is 0 the value has units of mB hPa When u is 1 the units are inches of mercury Hg When u is 9 the units depend on a user entered slope and offset u can...

Страница 19: ...temperature and the units The units will be 0 for Celsius and 1 for Farenheit aM3 aC3 aMC3 aCC3 measure user scale user offset elevation offset Use this if you want to view the user entered values tha...

Страница 20: ...s are selected the software will use the equation output mB scale offset where scale and offset are values you can enter into the system The XUU command is used to enter the user scale and offset The...

Страница 21: ...subsequent aD0 command will display this offset in units of mB The offset can also be displayed using the M3 command The returned value will be in the current units of pressure Analog Output Range Th...

Страница 22: ...n the following command would adjust the range 0XAR 800 1100 If the user wanted the ACCUBAR to output V1 volts at pressure P1 and V2 volts at pressure P2 then the following formulas would be used to d...

Страница 23: ...s to about 1 mA while for digital units it drops to about 0 2 mA Due to the increased power consumption the background conversions should not be enabled unless they are needed If only the analog outpu...

Страница 24: ...ent mode Depending on when the XT command is issued with respect to the background measurement there is the possibility that the first reading after issuing the XT command will be incorrect Resetting...

Страница 25: ...hen all units respond Ab Set SDI 12 address Version 1 9 and higher aAb b new SDI 12 address Example 5A9 set address 5 to address 9 the address was previously set to 5 b indicating that the new address...

Страница 26: ...ature and u is the units 0 Celsius and 1 Fahrenheit Use the XUT command to set the units C3 Request User Scale User Offset and Field Calibration Offset Version 2 0 and higher aC3 aD0 a00003 000 is the...

Страница 27: ...n be collected apt where p is the pressure in mB and t is the temperature in degrees Celsius CC Request Default Concurrent Pressure Measurement with CRC 16 Version 2 0 and higher aCC aD0 attt02 ttt is...

Страница 28: ...me in seconds until the measurement is ready and 2 is the number of values that can be collected asoC where s is the scale calibration o is the offset calibration mB and C is the CRC CC6 Request Concu...

Страница 29: ...he pressure is 1013 25 mB Note If the ACCUBAR only returns the address and no data values that indicates that there is no data available A measurement command has not been issued OR the command was ab...

Страница 30: ...measurement is ready and 2 is the number of values that can be collected a service request atu where t is the temperature and u is the units 0 Celsius and 1 Fahrenheit Use the XUT command to set the u...

Страница 31: ...Temperature Measurement Version 2 0 and higher aM7 aD0 attt2 ttt is the time in seconds until the measurement is ready and 2 is the number of values that can be collected a service request apt where p...

Страница 32: ...d C is the 3 character CRC Use the XUT command to set the units MC3 Request User Scale User Offset and Field Calibration Offset with CRC 16 Version 2 0 and higher aMC3 aD0 a0003 000 is the time in sec...

Страница 33: ...s and the XUP command to set the pressure units MC7 Request factory calibration Pressure and Temperature Measurement with CRC 16 Version 2 0 and higher aMC7 aD0 attt02 ttt is the time in seconds until...

Страница 34: ...ued to the new address after the XAD command will return the new address XE Set Elevation offset aXExu where x is the pressure offset u indicates the units of the offset 0 mB hPa 1 Hg 2 kPa 3 mmHg 4 A...

Страница 35: ...on Offset aXSdu where d is the desired reading for the sensor and in the units indicated by u The ACCUBAR will make repeated measurements and adjust the elevation offset to insure the reading matches...

Страница 36: ...mber of digits right of the decimal point Note Version 2 0 and higher Current settings can be queried by issuing the aXUP Command followed by the aD0 Command XUT Set temperature units aXUTn n 0 for Ce...

Страница 37: ...log Output to a fixed voltage aXAOv where v is the required output in VDC All input values are standard SDI 12 values with polarity sign a0011 indicating that the command will take one 1 second to com...

Страница 38: ...or and cable gland pointing downward This will prevent any moisture from following the cable or tubing down to the ACCUBAR sensor The ACCUBAR mounts to a panel or surface through two holes that are ac...

Страница 39: ...Metrology Lab Calibration The ACCUBAR does have the provision for a calibration to be performed by a Metrology Lab The calibration coefficients that can be entered by a metrology lab are a scale and a...

Страница 40: ...tion pressure as returned by the M1 command calibration offset is entered by the XC command calibration scale is entered by the XC command field offset is entered by the XE or XS commands units scale...

Страница 41: ...to be 1200 E 7 1 Command issued to a wild card address or Remove all other sensors from the recorder and try again Erroneous data Wrong units selected use the M command and look at the units field Ver...

Страница 42: ...ted by v to 0 and then repeats the process n times The output signal when observed with an oscilloscope will be a saw tooth wave form when the analog output is working properly The valid range for v i...

Страница 43: ...rature range Resolution 0 01mB Averaging Time 0 to 240 seconds user selectable Supply Voltage 8 to 28VDC reverse polarity protected Power Consumption RS 232 active 18mA typ SDI 12 active 7mA typ Quies...

Страница 44: ...Bringing the Benefits of Real Time Data Collection to the World Sutron Corporation 22400 Davis Drive Sterling Virginia 20164 4444 43...

Страница 45: ...to Pressure Measurement TYPES OF PRESSURE MEASUREMENTS ABSOLUTE PSIA Pressure is measured with respect to an absolute vacuum DIFFERENTIAL PSID Pressure is measured with respect to a second pressure p...

Страница 46: ...1 0856 2291 1050 1050 31 006 15 229 787 56 1 0363 989 1013 3 1013 3 29 921 14 696 760 00 1 0000 0 1000 1000 29 530 14 504 750 06 0 9869 364 950 950 28 053 13 779 712 56 0 9376 1773 900 900 26 577 13...

Страница 47: ...o and full scale is many times insufficient and ensures that the maximum error is achieved A best fit straight line decreases the maximum error by ensuring that the errors fall evenly on both sides Ex...

Страница 48: ...on repeatability errors ACCURACY Accuracy is a measure of how closely the sensor s output matches the true value of the parameter being sensed PRECISION Precision is a measure of the repeatability of...

Страница 49: ...we cannot quickly answer a question on an interface we will work with you until we find a solution Sometimes a problem is application related Although we pride ourselves on handling 95 of application...

Страница 50: ...ustomer shall prepay transportation charges to the factory Sutron shall pay transportation for the return of the repaired equipment to the customer when the validity of the damage claim has been estab...

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