Campbell MetSENS Series User manual

Revision: 05/2023
Copyright © 2019 – 2023
Campbell Scientific, Inc.

Table of contents
1. Introduction 1
2. Precautions 1
3. Initial inspection 1
4. QuickStart 2
5. Specifications 5
5.1 Air temperature measurement 8
5.2 Relative humidity measurements 8
5.3 Barometric pressure measurements 8
5.4 Wind speed measurements 9
5.5 Wind direction measurements 9
5.6 Precipitation input 9
5.7 Precipitation measurements 9
5.8 Compass 9
6. Installation 10
6.1 Wiring 10
6.1.1 RS-485 wiring 10
6.1.2 SDI-12 wiring 10
6.1.3 RS-232 wiring 11
6.2 Programming 11
6.2.1 Modbus programming 12
6.2.2 SDI-12 programming 13
6.2.3 RS-232 programming 13
6.3 Siting considerations for wind measurements 14
6.4 Mounting 14
7. Operation 15
7.1 Modbus measurements 15
7.2 SDI-12 measurements 18
7.3 RS-232 default settings 20
7.4 Sensor status code 23
Table of Contents - i

Appendix A. Importing Short Cut code into CRBasic Editor 24
Appendix B. SDI-12 sensor support 25
B.1 SDI-12 command basics 25
B.1.1 Acknowledge active command (a!) 26
B.1.2 Send identification command (al!) 26
B.1.3 Start verification command (aV!) 27
B.1.4 Address query command (?!) 27
B.1.5 Change address command (aAb!) 27
B.1.6 Start measurement commands (aM!) 28
B.1.7 Start measurement commands with cyclic redundancy check (aMC! and aCC!) 28
B.1.8 Stopping a measurement command 29
B.1.9 Send data command (aD0! … aD9!) 29
B.2 SDI-12 transparent mode 29
B.2.1 Changing an SDI-12 address 30
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
lREAD AND UNDERSTAND the Safety section at the back of this manual.
lCare 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.
lOpening the unit or breaking the security seal will void the warranty and the calibration.
lThe sensor is a precision instrument. Please handle it with care.
lWhen 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 RS-
485, or RS-232. The cable length can be 5m (17ft), 15m (50ft), 46m (150ft), or user specified.
Replacement cables are as follows:
lMETSENSCBL1 SDI-12 Replacement Cable
lMETSENSCBL2 RS-485 Replacement Cable
lMETSENSCBL3 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, and PC400.
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, or PC400 to make sure it is making reasonable
measurements.
MetSENS-Series Compact Weather Sensors 4

5. Specifications
Sampling rate: 1 Hz
Digital communication modes: Serial RS-232, RS-485, SDI-12, NMEA, Modbus, ASCII
Default configuration
RS-485: 19200 baud rate, 8 data bits, even parity, one stop bit;
default Modbus address is 41
SDI-12: Default SDI-12 address is 0
RS-232: 9600 baud rate, 8 data bits, even parity, one stop bit
IP rating: 66
Operating temperature range: –40 to 70 °C
Operating voltage: 5 to 30 VDC
Typical current drain @ 12 VDC: 25 mA continuous high mode,
0.7 mA eco-power mode (1 hour polled)
Compliance: CE and RoHS compliant.
Where applicable, all individual parameters meet or
exceed specifications of IEC 61724-1 (2017, 2021).
Compliance documents available at:
www.campbellsci.com/metsens200
www.campbellsci.com/metsens300
www.campbellsci.com/metsens500
www.campbellsci.com/metsens550
www.campbellsci.com/metsens600
MetSENS-Series Compact Weather Sensors 5

Table 5-1: Measurements, weight, and dimensions
Model Measurements Weight Dimensions
MetSENS200
Wind speed
Wind direction
Compass
0.5 kg (1.1 lb)
MetSENS300
Air temperature
Relative humidity
Barometric pressure
0.5 kg (1.1 lb)
155mm
7.5mm
Ø38.5mm
Ø44.5mm
142mm
MetSENS-Series Compact Weather Sensors 6

Table 5-1: Measurements, weight, and dimensions
Model Measurements Weight Dimensions
MetSENS500
Air temperature
Relative humidity
Barometric pressure
Wind speed
Wind direction
Compass
0.7 kg (1.5 lb)
222mm
38.5mm
44.5mm
7.5mm
142mm
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)
222mm
38.5mm
44.5mm
7.5mm
142mm
MetSENS-Series Compact Weather Sensors 7