Campbell Scientific MetSENS User Manual
Revision: 01/2021
Copyright © 2019 – 2021
Campbell Scientific, Inc.
Table of contents
1. Introduction 1
2. Precautions 1
3. Initial inspection 1
4. QuickStart 2
5. Specifications 4
5.1 Air temperature measurement 7
5.2 Relative humidity measurements 7
5.3 Barometric pressure measurements 7
5.4 Wind speed measurements 8
5.5 Wind direction measurements 8
5.6 Precipitation input 8
5.7 Precipitation measurements 8
5.8 Compass 8
6. Installation 9
6.1 Wiring 9
6.1.1 RS-485 wiring 9
6.1.2 SDI-12 wiring 9
6.1.3 RS-232 wiring 10
6.2 Programming 10
6.2.1 RS-485 programming 11
6.2.1.1 Modbus measurements 12
6.2.2 SDI-12 programming 14
6.2.2.1 SDI-12 measurements 15
6.2.3 RS-232 programming 16
6.3 Siting considerations for wind measurements 16
6.4 Mounting 16
Appendix A. Importing Short Cut code into CRBasic Editor 18
Appendix B. SDI-12 sensor support 19
B.1 SDI-12 command basics 19
Table of Contents - i
B.1.1 Acknowledge active command (a!) 20
B.1.2 Send identification command (al!) 20
B.1.3 Start verification command (aV!) 21
B.1.4 Address query command (?!) 21
B.1.5 Change address command (aAb!) 21
B.1.6 Start measurement commands (aM!) 22
B.1.7 Start measurement commands with cyclic redundancy check (aMC! and aCC!) 22
B.1.8 Stopping a measurement command 23
B.1.9 Send data command (aD0! … aD9!) 23
B.2 SDI-12 transparent mode 23
B.2.1 Changing an SDI-12 address 24
Table of Contents - ii
1. Introduction
The MetSENS-series compact weather sensors monitor different combinations of common
meteorological parameters to international standards—all in a single, integrated instrument. A
variety of output options ensure plug and play operability in a wide variety of applications.
2. Precautions
l READ AND UNDERSTAND the Safety section at the back of this manual.
l Care should be taken when opening the shipping package to not damage or cut the cable
jacket. If damage to the cable is suspected, consult with a Campbell Scientific support and
implementation engineer.
l Opening the unit or breaking the security seal will void the warranty and the calibration.
l The sensor is a precision instrument. Please handle it with care.
l When installing the unit, handle with lint free gloves and degrease the unit to reduce the
build-up of deposits.
3. Initial inspection
Upon receipt of the MetSENS-series sensor, inspect the packaging and contents for damage. File
damage claims with the shipping company.
Each MetSENS-series sensor is shipped pre-configured, with a test report and cable.
Configuration and cable type depends on the communication mode chosen: SDI-12, Modbus RS485, or RS-232. The cable length can be 5m (17ft), 15m (50ft), 46m (150ft), or user specified.
Replacement cables are as follows:
l METSENSCBL1 SDI-12 Replacement Cable
l METSENSCBL2 RS-485 Replacement Cable
l METSENSCBL3 RS-232 Replacement Cable
MetSENS-Series Compact Weather Sensors 1
4. QuickStart
A video that describes data logger programming using Short Cut is available at:
www.campbellsci.com/videos/cr1000x-data logger-getting-started-program-part-3 . Short Cut
is an easy way to program your data logger to measure the sensor and assign data logger wiring
terminals. Short Cut is available as a download on www.campbellsci.com. It is included in
installations of LoggerNet, RTDAQ, PC400, and PC200W.
The following procedure also shows using Short Cut to program the sensor.
1. Open Short Cut and click Create New Program.
2. Double-click the data logger model.
3. In the Available Sensors and Devices box, type MetSENS or locate the sensor in the Sensors
> Meteorological > Basic Weather > MetSENS folder. Double-click the appropriate sensor
model and output. Type the correct SDI-12 Address (default is zero) or Modbus Address
(default is 41). If measuring barometric pressure, type the elevation of the site in the same
units as the Site elevation units. Default units are meters, which can be changed by clicking
on the Site elevation units box and selecting Feet.
MetSENS-Series Compact Weather Sensors 2
4. Click the Wiring tab to see how the sensor is to be wired to the data logger. Click OK after
wiring the sensor.
5. Repeat steps three and four for other sensors.
6. In Output Setup, type the scan rate, meaningful table names, and Data Output Storage
Interval.
MetSENS-Series Compact Weather Sensors 3
7. Select the measurement and its associated output option.
8. Click Finish and save the program. Send the program to the data logger if the data logger
is connected to the computer.
9. If the sensor is connected to the data logger, check the output of the sensor in the data
display in LoggerNet, RTDAQ, PC400, or PC200W to make sure it is making reasonable
measurements.
5. Specifications
Sampling rate:
Digital communication modes:
Default configuration
RS-485:
SDI-12:
RS-232:
IP rating:
Compliance:
1 Hz
Serial RS-232, RS-485, SDI-12, NMEA, Modbus, ASCII
19200 baud rate, 8 data bits, even parity, one stop bit;
default Modbus address is 41
Default SDI-12 address is 0
9600 baud rate, 8 data bits, even parity, one stop bit
66
CE, RoHS; compliance documents available at:
www.campbellsci.com/metsens200
www.campbellsci.com/metsens300
www.campbellsci.com/metsens500
MetSENS-Series Compact Weather Sensors 4
www.campbellsci.com/metsens550
155mm
7.5mm
Ø38.5mm
Ø44.5mm
142mm
www.campbellsci.com/metsens600
Operating temperature range:
Operating voltage:
Typical current drain @ 12 VDC:
–40 to 70 °C
5 to 30 VDC
25 mA continuous high mode,
0.7 mA eco-power mode (1 hour polled)
Table 5-1: Measurements, weight, and dimensions
Model Measurements Weight Dimensions
Wind speed
MetSENS200
Wind direction
0.5 kg (1.1 lb)
Compass
MetSENS300
Air temperature
Relative humidity
Barometric pressure
0.5 kg (1.1 lb)
MetSENS-Series Compact Weather Sensors 5
Table 5-1: Measurements, weight, and dimensions
222mm
38.5mm
44.5mm
7.5mm
142mm
222mm
38.5mm
44.5mm
7.5mm
142mm
Model Measurements Weight Dimensions
Air temperature
Relative humidity
Barometric pressure
MetSENS500
0.7 kg (1.5 lb)
Wind speed
Wind direction
Compass
MetSENS550
Air temperature
Relative humidity
Barometric pressure
Wind speed
Wind direction
Compass
Connector for the
TE525METS or other rain
gage
0.7 kg (1.5 lb)
MetSENS-Series Compact Weather Sensors 6
Table 5-1: Measurements, weight, and dimensions
7.5mm
Ø38.5mm
142mm
Ø44.5mm
261mm
40mm
Model Measurements Weight Dimensions
Air temperature
Relative humidity
Barometric pressure
MetSENS600
Wind speed
Wind direction
Compass
Precipitation (optical)
0.8 kg (1.8 lb)
5.1 Air temperature measurement
Measurement range:
Resolution:
Accuracy:
–40 to 70 °C
0.1 °C
±0.3 °C @ +20 °C
5.2 Relative humidity measurements
Measurement range:
Resolution:
Accuracy:
0 to 100%
0.1 %
± 2% @ 20 °C (10 to 90% RH)
5.3 Barometric pressure measurements
Measurement range:
Resolution:
Accuracy:
300 to 1100 hPa
0.1 hPa
±0.5 hPa @ 25 °C
MetSENS-Series Compact Weather Sensors 7
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