Campbell 61302V Instruction Manual
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Campbell 61302V Instruction Manual

Barometric pressure sensor
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61302V
Barometric Pressure Sensor
September 2009
Copyright © 2009
Campbell Scientific (Canada)Corp.

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Summary of Contents for Campbell 61302V

  • Page 1 61302V Barometric Pressure Sensor September 2009 Copyright © 2009 Campbell Scientific (Canada)Corp.
  • Page 2 WARRANTY AND ASSISTANCE This equipment is warranted by CAMPBELL SCIENTIFIC (CANADA) CORP. (“CSC”) to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. ***** Batteries are not warranted.

  • Page 3: Table Of Contents

    61302V Barometric Pressure Sensor Table of Contents 1. INTRODUCTION ................2 2. SPECIFICATIONS................2 3. INSTALLATION ................3 3.1. Mounting................... 3 3.2. Wiring..................3 3.2.1. Serial Output Wiring .............. 4 3.2.2. Analog Output Wiring ............4 4. SENSOR OPERATION ..............4 4.1.

  • Page 4: Introduction

    Low power consumption and wide temperature range make the 61302V ideal for remote applications using battery or solar power. An accuracy of ±0.3 hPa rms is maintained over the entire specified operating pressure and temperature range. Full scale voltage output (2.5V or 5V) may be set to span any portion of the...

  • Page 5: Installation

    Campbell Scientifics’ white fibreglass enclosures. If the 61302V is to being installed in an enclosure a QDP HYDRO VENT should used. Otherwise the included poly tube can be used to vent the sensor to the outdoors via the enclosure port.

  • Page 6: Serial Output Wiring

    Shield Single ended wiring is the only available analog measurement. SENSOR OPERATION The 61302V Barometric Pressure sensor offers a variety of serial and analog configurations, which are discussed in the following sections. Communication/Output connections are made with the 5-position terminal plug included with the sensor. Changes to the sensor configuration require changes to jumper and/or software settings.

  • Page 7: Serial Output

    61302V Barometric Pressure Sensor If changed from the standard configuration to an analog output, please note that the software Vout Scale parameter must be set to agree with the hardware Voltage Output Scale jumper (P3) in order to achieve calibrated output.

  • Page 8: Analog Output

    61302V Barometric Pressure Sensor Analog Output 4.2. If the 61302V is to be used in a voltage output mode it is recommended that the output range of the sensor be remapped by changing the output range in the sensor software. This is important in maintaining the highest level of measurement accuracy.

  • Page 9: Software Commands

    61302V Barometric Pressure Sensor the TRIG to +PWR or left floating, as the datalogger program will control the sensor power. Software Commands 4.3. Software commands sent via serial communication may be used to set operational parameters. The sensor must be configured for serial communication and connected to a PC or other compatible device using a program like HyperTerminal.

  • Page 10: Programming

    PROGRAMMING The 61302V draws upwards of 7mA of power when activated. Depending on your power supply it may be beneficial to conserve power. This can be achieved by powering the sensors on and off.

  • Page 11: Serial Output Program Example

    P = 1013.25 [ 1 – ( 1 – Elevation/44307.69231 ) ^5.253283 ] Serial Output Program Example 5.1. The program example illustrates the polling of a 61302V in its default configuration using a CR1000 datalogger. Communications will occur on serial port COM1. The sensor is powered for one minute before the top of each hour, at which time the sensor is polled for a measurement.
  • Page 12 'Configure ComPort 1 for use with the 61302V SerialOpen (Com1,9600,0,0,1000) Scan (5,Sec,0,0) ' Switch 61302V Sensor On 1 minute before the top of the hour If TimeIntoInterval (59,60,Min) Then SW12 (1) ' Poll 61302V Sensor at the top of the hour...

  • Page 13: Voltage Output Program Example

    EndTable 'Main Program BeginProg Scan (5,Sec,0,0) ' Switch 61302V Sensor On 1 minute before the top of the hour If TimeIntoInterval (59,60,Min) Then SW12 (1) ' Poll 61302V Sensor at the top of the hour If TimeIntoInterval (0,60,Min) Then '*** Measure Analog 61302V *** VoltSe (BP_61302V_Analog,1,mV5000,1,1,0,_60Hz,0.12,500)
  • Page 14 61302V Barometric Pressure Sensor ' Switch 61302V Sensor Off after polling SW12 (0) ' Correct Barometric Pressure value for elevation above sea level (elevation must be in meters) Elevation_Correction = 1013.25 * (1 - (1 - Elevation/44307.69231)^5.253283) BP_61302V_Analog = BP_61302V_Analog + Elevation_Correction...

  • Page 15: Typical Wiring Connections

    61302V Barometric Pressure Sensor  ...

  • Page 16: Software Configuration For Voltage Output

    • All commands must be completed with hitting the ENTER key. 1. Connect the 61302V to the PC. Please note in order to make the connection to the PC you will require either an interface board (i.e. DB9M-TERM), or a 9-pin cable with connections for Tx, Rx, and Ground.
  • Page 17 61302V Barometric Pressure Sensor 4. Use CMD140 to set the upper measurement limit to 1050. Use CMD 142 to set the lower measurement limit to 950. These changes must be saved to flash memory, which is done by entering CMD420.
  • Page 18 61302V Barometric Pressure Sensor 6. Restart the measurement process with CMD300 2. 7. Once the configuration is complete you can power the sensor down and replace all jumpers required for your specific application.  ...

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