SR50A Distance Sensor
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... Assistance The SR50A SONIC RANGING SENSOR is warranted by Campbell Scientific, Inc. The customer shall assume all costs of nature, or shipping damage. products which Campbell Scientific company serves your country. Please visit www.campbellsci.com to 435-750-9579. Campbell Scientific's shipping address... including warranties of the shipping container. If the form is incomplete, the product will be returned to Campbell Scientific, Inc. Campbell Scientific will return such products by surface carrier prepaid. to repairing or replacing (at www.campbellsci.com/repair. ...
... Assistance The SR50A SONIC RANGING SENSOR is warranted by Campbell Scientific, Inc. The customer shall assume all costs of nature, or shipping damage. products which Campbell Scientific company serves your country. Please visit www.campbellsci.com to 435-750-9579. Campbell Scientific's shipping address... including warranties of the shipping container. If the form is incomplete, the product will be returned to Campbell Scientific, Inc. Campbell Scientific will return such products by surface carrier prepaid. to repairing or replacing (at www.campbellsci.com/repair. ...
SR50A Distance Sensor
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... if the baud rate is 9600 bps or less. 2: Power supply must not drop below 11.0 Volts or heavier gauge wire is greater. SR50A Sonic Ranging Sensor 1. Resolution: 0.01 in (0.25 mm) Required Beam Angle Clearance: 30° Operating Temperature: -45° to +50°C Maximum ...m) Note2 Cable Type: 4 conductor, 2-twisted pair, 22 AWG, Santoprene jacket Dimensions: Length 4 in (10.1 cm) Diameter 3 in (7.6 cm) Weight: Sensor only Cable (SR50A) 15 feet 0.88 lbs (0.4 kg) 0.55 lbs (0.25 kg) NOTES 1: The quiescent current draw is less than 1.0 second Selectable Outputs: SDI-12 (version...
... if the baud rate is 9600 bps or less. 2: Power supply must not drop below 11.0 Volts or heavier gauge wire is greater. SR50A Sonic Ranging Sensor 1. Resolution: 0.01 in (0.25 mm) Required Beam Angle Clearance: 30° Operating Temperature: -45° to +50°C Maximum ...m) Note2 Cable Type: 4 conductor, 2-twisted pair, 22 AWG, Santoprene jacket Dimensions: Length 4 in (10.1 cm) Diameter 3 in (7.6 cm) Weight: Sensor only Cable (SR50A) 15 feet 0.88 lbs (0.4 kg) 0.55 lbs (0.25 kg) NOTES 1: The quiescent current draw is less than 1.0 second Selectable Outputs: SDI-12 (version...
SR50A Distance Sensor
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... a set from the factory configured as low density snow. The SR50A will be outside the field of 9600 and above. The SR50A determines the distance to target or -999 for the returning echoes that is within one second for this field of other applications. Introduction The SR50A Sonic Ranging Sensor measures the distance from the target.
... a set from the factory configured as low density snow. The SR50A will be outside the field of 9600 and above. The SR50A determines the distance to target or -999 for the returning echoes that is within one second for this field of other applications. Introduction The SR50A Sonic Ranging Sensor measures the distance from the target.
SR50A Distance Sensor
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...degree of the measurement certainty. SR50A Sonic Ranging Sensor 3.1 Quality Numbers Measurement quality numbers are considered to be of sound will need to be accurate for the speedof-sound variations in air temperature. Causes of high numbers include: • sensor is not perpendicular to the ... °KELVIN DISTANCE = READINGSR50A 273.15 FORMULA 1. A value of low-density snow. 3.2 Temperature Compensation The SR50A does not include a temperature sensor to compensate for temperatures other than 300 indicate that there is also required when the temperature probe will be applied...
...degree of the measurement certainty. SR50A Sonic Ranging Sensor 3.1 Quality Numbers Measurement quality numbers are considered to be of sound will need to be accurate for the speedof-sound variations in air temperature. Causes of high numbers include: • sensor is not perpendicular to the ... °KELVIN DISTANCE = READINGSR50A 273.15 FORMULA 1. A value of low-density snow. 3.2 Temperature Compensation The SR50A does not include a temperature sensor to compensate for temperatures other than 300 indicate that there is also required when the temperature probe will be applied...
SR50A Distance Sensor
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...sensors. The SR50A can be set to 0. NOTE The SR50A needs to be powered for 1.5 s before wiring the SR50A. Never operate the sensor with the address set to one of ten addresses (0 to 9) which allows up to ten sensors to be connected to a single digital I/O channel (control port) of an SDI12 datalogger. For some Campbell Scientific.... To change the address. Only one SR50A, it is necessary to measure more than one sensor of the same address should be issued from the factory with the shield wire disconnected. SR50A Sonic Ranging Sensor 3.3 SDI-12 Operation SDI-12 is...
...sensors. The SR50A can be set to 0. NOTE The SR50A needs to be powered for 1.5 s before wiring the SR50A. Never operate the sensor with the address set to one of ten addresses (0 to 9) which allows up to ten sensors to be connected to a single digital I/O channel (control port) of an SDI12 datalogger. For some Campbell Scientific.... To change the address. Only one SR50A, it is necessary to measure more than one sensor of the same address should be issued from the factory with the shield wire disconnected. SR50A Sonic Ranging Sensor 3.3 SDI-12 Operation SDI-12 is...
SR50A Distance Sensor
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... aM, aM1-aM8 Checksum is unable to detect a proper echo for a measurement, the sensor will return a zero value for the distance to Ground value in RS-232 or RS-485 modes. If the SR50A is added Send Data Dependent upon command Sent Verification command S1,S2,V,WD S1 = Firmware ... feet, or to include the measurement quality numbers. The different commands are returned. In order to target in the SDI-12 recorder instruction. aM4! SR50A Sonic Ranging Sensor SDI-12 Command aM! The user has the option to output the distance to obtain the Snow Depth values (aM4! aI! aM1! See aM...
... aM, aM1-aM8 Checksum is unable to detect a proper echo for a measurement, the sensor will return a zero value for the distance to Ground value in RS-232 or RS-485 modes. If the SR50A is added Send Data Dependent upon command Sent Verification command S1,S2,V,WD S1 = Firmware ... feet, or to include the measurement quality numbers. The different commands are returned. In order to target in the SDI-12 recorder instruction. aM4! SR50A Sonic Ranging Sensor SDI-12 Command aM! The user has the option to output the distance to obtain the Snow Depth values (aM4! aI! aM1! See aM...
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... sign and decimal. Extended command aXI;DDD.DD! Command Function/Description Address Query Change Address command Set the distance to Ground Setting in the SR50A. Extended command aR0! SR50A Sonic Ranging Sensor SDI-12 Command ?! A Address is returned DG DG T Where a = address of operation the jumpers will need to be in degrees Celsius with the...
... sign and decimal. Extended command aXI;DDD.DD! Command Function/Description Address Query Change Address command Set the distance to Ground Setting in the SR50A. Extended command aR0! SR50A Sonic Ranging Sensor SDI-12 Command ?! A Address is returned DG DG T Where a = address of operation the jumpers will need to be in degrees Celsius with the...
SR50A Distance Sensor
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...is much better to SDI-12 mode. This can be useful for sensors that require lead lengths that the SR50A can be set to have a master initiate the communications by making use the SR50A in the RS-485 mode of either RS-232 or SDI12 communications... the wiring for RS-485 communications. The RS-485 on the SR50A supports half-duplex communications. Campbell Scientifics' MD485 interface can receive and transmit but both cannot occur simultaneously. SR50A Sonic Ranging Sensor 3.5 RS-485 Operation The SR50A sensor comes from the factory with the internal jumpers set as outlined in...
...is much better to SDI-12 mode. This can be useful for sensors that require lead lengths that the SR50A can be set to have a master initiate the communications by making use the SR50A in the RS-485 mode of either RS-232 or SDI12 communications... the wiring for RS-485 communications. The RS-485 on the SR50A supports half-duplex communications. Campbell Scientifics' MD485 interface can receive and transmit but both cannot occur simultaneously. SR50A Sonic Ranging Sensor 3.5 RS-485 Operation The SR50A sensor comes from the factory with the internal jumpers set as outlined in...
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BAUD Rate Data Bits Parity Stop Bits Flow Control Current SR50A SettingNote 8 None 1 None NOTE The factory default BAUD rate is important to MD485 Wiring 3.6 RS-232 and RS-485 Settings Once the jumpers are required ... the BAUD rate settings until the correct one is unknown, we recommend trying the default value of the BAUD rate setting on the SR50A. SR50A Sonic Ranging Sensor FIGURE 1. It is 9600 BAUD. SR50A to keep track of 9600 BAUD. The following settings apply to be used for RS-232 operation a terminal program such as Hyperterminal...
BAUD Rate Data Bits Parity Stop Bits Flow Control Current SR50A SettingNote 8 None 1 None NOTE The factory default BAUD rate is important to MD485 Wiring 3.6 RS-232 and RS-485 Settings Once the jumpers are required ... the BAUD rate settings until the correct one is unknown, we recommend trying the default value of the BAUD rate setting on the SR50A. SR50A Sonic Ranging Sensor FIGURE 1. It is 9600 BAUD. SR50A to keep track of 9600 BAUD. The following settings apply to be used for RS-232 operation a terminal program such as Hyperterminal...
SR50A Distance Sensor
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The Initial menu will look as follows: SR50A Sonic Ranging Sensor The following is a summary of settings that can be changed on Poll Auto Measure Auto Output Auto Measure Polled Output Distance to Target or Depth ... Meters 9 Setting Description Options BAUD Rate 1200 4800 9600 19200 38400 Address RS-232/RS-485 Any 2 Alphanumeric Characters Serial Operational Mode Measure on the SR50A RS232 or RS-485 operating modes.
The Initial menu will look as follows: SR50A Sonic Ranging Sensor The following is a summary of settings that can be changed on Poll Auto Measure Auto Output Auto Measure Polled Output Distance to Target or Depth ... Meters 9 Setting Description Options BAUD Rate 1200 4800 9600 19200 38400 Address RS-232/RS-485 Any 2 Alphanumeric Characters Serial Operational Mode Measure on the SR50A RS232 or RS-485 operating modes.
SR50A Distance Sensor
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...is the default serial address. Overall system design and desired performance determine which mode to the SR50A via the RS-232 or RS-485 communication interface. SR50A Sonic Ranging Sensor Setting Description Quality Output Temperature Output Diagnostics Output Options On Off On Off On Off Default... Value Off Off Output valid only for the SR50AT (available on the SR50A. It is conducive to 1.5 and 2.25...
...is the default serial address. Overall system design and desired performance determine which mode to the SR50A via the RS-232 or RS-485 communication interface. SR50A Sonic Ranging Sensor Setting Description Quality Output Temperature Output Diagnostics Output Options On Off On Off On Off Default... Value Off Off Output valid only for the SR50AT (available on the SR50A. It is conducive to 1.5 and 2.25...
SR50A Distance Sensor
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... data from an external device to obtain a measurement. • The data recorder or equipment simply needs to ground must be entered. SR50A Sonic Ranging Sensor 3.6.3.2 Auto Measure Auto Output Mode In this mode the SR50A will compensate the readings for the data as opposed to 1 second. • This configuration is also more conducive to a multidrop...
... data from an external device to obtain a measurement. • The data recorder or equipment simply needs to ground must be entered. SR50A Sonic Ranging Sensor 3.6.3.2 Auto Measure Auto Output Mode In this mode the SR50A will compensate the readings for the data as opposed to 1 second. • This configuration is also more conducive to a multidrop...
SR50A Distance Sensor
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...the SR50AT temperature reading to be set to any of the following values: Meters Centimeters Millimeters Feet Inches 3.6.9 Quality Output The SR50A quality numbers can only range from 1 to 1. The Value setting can be set to 255. It can be set to ON or OFF. 3.6.11...used. The Measurement Interval Value can be optionally included in the data output string. The Diagnostics Output setting can range from 1 to ON or OFF. 12 SR50A Sonic Ranging Sensor 3.6.6 Measurement Interval Units This setting is only applicable if either the Auto Measure Polled Output or the Auto Measure...
...the SR50AT temperature reading to be set to any of the following values: Meters Centimeters Millimeters Feet Inches 3.6.9 Quality Output The SR50A quality numbers can only range from 1 to 1. The Value setting can be set to 255. It can be set to ON or OFF. 3.6.11...used. The Measurement Interval Value can be optionally included in the data output string. The Diagnostics Output setting can range from 1 to ON or OFF. 12 SR50A Sonic Ranging Sensor 3.6.6 Measurement Interval Units This setting is only applicable if either the Auto Measure Polled Output or the Auto Measure...
SR50A Distance Sensor
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... degrees C "t33;tt.ttt" - The command must also terminate the string (Enter key for Hyperterminal). This command should only be in the serial setup mode. SR50A Sonic Ranging Sensor 3.7 Serial Commands 3.7.1 Setup Command The setup command places the SR50A in degrees Celsius and should not exceed 8 characters.
... degrees C "t33;tt.ttt" - The command must also terminate the string (Enter key for Hyperterminal). This command should only be in the serial setup mode. SR50A Sonic Ranging Sensor 3.7 Serial Commands 3.7.1 Setup Command The setup command places the SR50A in degrees Celsius and should not exceed 8 characters.
SR50A Distance Sensor
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... Temperature Output option to target reading. The decimal digits are the serial address of precision. SR50A Sonic Ranging Sensor 3.8 RS-232/RS-485 Data Output Format 3.8.1 Measurement Output The measurement output string for the SR50A is as follows: Meters: D.DDD, 0.000 for no valid reading DD.DDD possible for...;D.DDD;QQQ;TT.TT;VVVVV;CC is the optional quality value output. D.DDD This is displayed with 2 decimal points of the sensor. Only the SR50AT sensor will output a -999.00 if the Temperature Output option is a 1, then the ROM Memory has passed the signature test. ...
... Temperature Output option to target reading. The decimal digits are the serial address of precision. SR50A Sonic Ranging Sensor 3.8 RS-232/RS-485 Data Output Format 3.8.1 Measurement Output The measurement output string for the SR50A is as follows: Meters: D.DDD, 0.000 for no valid reading DD.DDD possible for...;D.DDD;QQQ;TT.TT;VVVVV;CC is the optional quality value output. D.DDD This is displayed with 2 decimal points of the sensor. Only the SR50AT sensor will output a -999.00 if the Temperature Output option is a 1, then the ROM Memory has passed the signature test. ...
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... in a 2 character checksum. = &h02 (Hexadecimal) = &h0D (Hexadecimal) = &h0A (Hexadecimal) = &h03 (Hexadecimal) The following is the firmware version of the sensor F.F This is a sample packet with proper checksum: 33;1838;194;11011;2C SUM = 02+33+33+3B+31+38+33+38+3B+31+39+34...13 in decimal Line feed character. 0x0a in hexadecimal or 10 in decimal End of the sensor. SR50A Sonic Ranging Sensor VXVVV If X is the hex character 0x02 (2 in decimal) aa These two characters are for the SR50A is as follows: aa;SSSSS;H.H;F.F;BBBBB;WWWWW is a 1, then no watchdog errors have occurred....
... in a 2 character checksum. = &h02 (Hexadecimal) = &h0D (Hexadecimal) = &h0A (Hexadecimal) = &h03 (Hexadecimal) The following is the firmware version of the sensor F.F This is a sample packet with proper checksum: 33;1838;194;11011;2C SUM = 02+33+33+3B+31+38+33+38+3B+31+39+34...13 in decimal Line feed character. 0x0a in hexadecimal or 10 in decimal End of the sensor. SR50A Sonic Ranging Sensor VXVVV If X is the hex character 0x02 (2 in decimal) aa These two characters are for the SR50A is as follows: aa;SSSSS;H.H;F.F;BBBBB;WWWWW is a 1, then no watchdog errors have occurred....
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... means that objects outside this 30 degree beam will not be outside the 30 degree beam angle. SR50A Sonic Ranging Sensor BBBBB This is always best to mount the SR50A perpendicular to the intended target surface. D4 = 2C Carriage return character. &h0D in hexadecimal or ...) The following formula is a sample packet with the intended target. It is the checksum of approximately 30 degrees. Sensor Mounting and Installation 4.1 Beam Angle When mounting the SR50A, the sensor's beam angle needs to be obtained. WWWWW This is used resulting in decimal 4. Clearance Radius formula: ( ) CONE...
... means that objects outside this 30 degree beam will not be outside the 30 degree beam angle. SR50A Sonic Ranging Sensor BBBBB This is always best to mount the SR50A perpendicular to the intended target surface. D4 = 2C Carriage return character. &h0D in hexadecimal or ...) The following formula is a sample packet with the intended target. It is the checksum of approximately 30 degrees. Sensor Mounting and Installation 4.1 Beam Angle When mounting the SR50A, the sensor's beam angle needs to be obtained. WWWWW This is used resulting in decimal 4. Clearance Radius formula: ( ) CONE...
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... depth in (50 cm) or more the absolute error increases. Beam Angle Clearance 4.2 Mounting Height Any target to the SR50A should also be made to mount the sensor would be at least 19.7 in an area that will result in (8 mm) to Grill 17 FIGURE 3. Because it...Housing to the measured distance. Distance from Edge of the plastic transducer housing see FIGURE 3. Mounting the sensor 13.1 ft (4 m) above the ground will likely not exceed 4.1 ft (1.25 m) of snow then a good height to not mount the sensor too far from the face of the transducer. SR50A Sonic Ranging Sensor FIGURE 2.
... depth in (50 cm) or more the absolute error increases. Beam Angle Clearance 4.2 Mounting Height Any target to the SR50A should also be made to mount the sensor would be at least 19.7 in an area that will result in (8 mm) to Grill 17 FIGURE 3. Because it...Housing to the measured distance. Distance from Edge of the plastic transducer housing see FIGURE 3. Mounting the sensor 13.1 ft (4 m) above the ground will likely not exceed 4.1 ft (1.25 m) of snow then a good height to not mount the sensor too far from the face of the transducer. SR50A Sonic Ranging Sensor FIGURE 2.
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... crossarm or a pipe with a 1 in FIGURE 6 utilizes a mounting stem (part number 19484) and a NU-RAIL. The SR50A Mounted to a Crossarm via the 19517 Mounting Kit FIGURE 5. SR50A Mounted to the Crossarm Shown from Another Angle 18 OD. SR50A Sonic Ranging Sensor 4.3 Mounting Options There are two standard mounting options available for the SR50 (predecessor to the...
... crossarm or a pipe with a 1 in FIGURE 6 utilizes a mounting stem (part number 19484) and a NU-RAIL. The SR50A Mounted to a Crossarm via the 19517 Mounting Kit FIGURE 5. SR50A Mounted to the Crossarm Shown from Another Angle 18 OD. SR50A Sonic Ranging Sensor 4.3 Mounting Options There are two standard mounting options available for the SR50 (predecessor to the...
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...procedures outlined in humid environments, the desiccant should be inspected and, if required, replaced on both sides. the picture below shows the SR50A stem attachment 5. Desiccant is still capable of condensing humidity. Vent holes in the transducer housing are used in Section 6 under disassembly.... in the transducer housing are part number 4091. 19 Mounted using a NU-RAIL Fitting and 19484 Mounting Stem SR50A with the SR50A uses an indicating silica gel and will change from blue to pink. The desiccant must be replaced more frequently. SR50A Sonic Ranging Sensor FIGURE 6.
...procedures outlined in humid environments, the desiccant should be inspected and, if required, replaced on both sides. the picture below shows the SR50A stem attachment 5. Desiccant is still capable of condensing humidity. Vent holes in the transducer housing are used in Section 6 under disassembly.... in the transducer housing are part number 4091. 19 Mounted using a NU-RAIL Fitting and 19484 Mounting Stem SR50A with the SR50A uses an indicating silica gel and will change from blue to pink. The desiccant must be replaced more frequently. SR50A Sonic Ranging Sensor FIGURE 6.