Pressure

Barometric Pressure Sensors combine high accuracy and low power over a wide range of pressures and temperatures.
Model 61302V provides a calibrated 0-5 VDC analog output. Analog current consumption is less than 3 mA. A special “sleep” mode further reduces current to about 1 µA. RS232 serial output is also available in the standard sensor. Model 61302L features a standard 4-20 mA analog output. Two serial options, RS-232 and RS-485, are included with this model. The compact size of the barometer allows easy placement in most standard instrument enclosures. A plug-in connector simplifies wiring. For outdoor use, an optional Weatherproof Enclosure offers a convenient mounting location while the Pressure Port helps minimize dynamic pressure errors due to wind.
INTRODUCTION
MODEL 61302L Barometric Pressure Sensor is a versatile electronic barometer featuring high accuracy, low power, wide operating temperature range, and calibrated 4-20 mA output, and RS-232/485 serial data I/O. The 4-20 mA output and RS-485 serial I/O make the 61302L ideal for commercial and industrial applications that commonly use these signals. Full scale current output may be set to span any portion of the 500 to 1100 hPa operating range. Serial output options include continuous or polled ASCII text output or NMEA marine output. The sensor is supplied with the following standard configuration:
INSTALLATION
The sensor operates over a temperature range of -40°C to +60°C and must remain dry. Electrical connections are made with the 5-position terminal plug included with the sensor. Jumper settings may be used to select operating options. Access jumpers by loosening two screws in the sensor enclosure and removing the cover. See Appendix A for wiring details and jumper settings.
OPERATION
Operation begins approximately 1 second after power is applied. Output will appear after a delay determined by the number of samples averaged and the output rate. With default values (1.8 Hz output and 10 samples averaged), output begins after an initial 5 second delay then remains continuous at the 1.8 Hz rate. Parameters for output rate and number of samples averaged may be changed using software commands.
MAINTENANCE
he MODEL 61302L barometer requires no regular maintenance. Periodic calibration certification, if required, is available from the factory.
WARRANTY
This product is warranted to be free of defects in materials and construction for a period of 12 months from date of initial purchase. Liability is limited to repair or replacement of defective item. A copy of the warranty policy may be obtained from R. M. Young Company.
CE COMPLIANCE
This product complies with European CE requirements for the EMC Directive. Please note that shielded cable must be used.
Ordering Information MODEL
BAROMETRIC PRESSURE SENSOR – 0-5 VDC 61302V
BAROMETRIC PRESSURE SENSOR – 4-20 mA 61302L
WeatherProof Enclosure 61360
Pressure Port with Offset Bracke 61002
SPECIFICATIONS
Pressure Range:
500 to 1100 hPa
Operating Temperature:
-40 to +60°C
Digital Accuracy*
0.2 hPa (25°C)
0.3 hPa (-40 to +60°C)
Analog Accuracy**
0.05% of analog pressure range
Analog Temperature Dependence
0.0017% of analog pressure range/ °C (25°C reference)
Long Term Stability:
0.2% FS per year
Update Rate:
1.8 Hz max
Serial Output:
Full duplex RS-232
9600 baud
Polled or continuous
ASCII text, NMEA
Half duplex RS-485 (61302L only)
Analog Output:
0 to 5000 mV, 0 to 2500 mV (61302V)
4 to 20 mA (61302L)
Resolution:
Serial 0.01 hPa
Analog 0.025% of analog scale
Power:
7 to 30 VDC
61302V – Vout, 2.8 mA
  – Sleep mode, 1.4 μA
  – RS-232, 7 mA
61302L – 4-20 mA, 25 mA max
  – RS-232 or RS-485, 7 mA
Dimensions:
90 mm (3.6 in) x 60 mm (2.4 in) x 20 mm (0.8 in)
Weight:
44 g (1.5 oz)
*
Defined as ±1 standard deviation from NIST traceable pressure reference. Includes non-linearity, hysteresis, repeatability, and calibration uncertainty.

**
Defined as ±1 standard deviation from ideal analog output. Total analog output accuracy is the root sum square of digital accuracy, analog accuracy, and analog temperature dependence.