Contents

Revision and copyright information
Table of contents
1. Introduction
2. Precautions
3. Initial inspection
4. QuickStart
5. Specifications
- 5.1 Air temperature measurement
- 5.2 Relative humidity measurements
- 5.3 Barometric pressure measurements
- 5.4 Wind speed measurements
- 5.5 Wind direction measurements
- 5.6 Precipitation input
- 5.7 Precipitation measurements
- 5.8 Compass
6. Installation
- 6.1 Wiring
  - 6.1.1 RS-485 wiring
  - 6.1.2 SDI-12 wiring
  - 6.1.3 RS-232 wiring
- 6.2 Programming
  - 6.2.1 Modbus programming
  - 6.2.2 SDI-12 programming
  - 6.2.3 RS-232 programming
- 6.3 Siting considerations for wind measurements
- 6.4 Mounting
7. Operation
- 7.1 Modbus measurements
- 7.2 SDI-12 measurements
- 7.3 RS-232 default settings
- 7.4 Status codes
Appendix A. Importing Short Cut code into CRBasic Editor
Appendix B. SDI-12 sensor support
- B.1 SDI-12 command basics
  - B.1.1 Acknowledge active command (a!)
  - B.1.2 Send identification command (al!)
  - B.1.3 Start verification command (aV!)
  - B.1.4 Address query command (?!)
  - B.1.5 Change address command (aAb!)
  - B.1.6 Start measurement commands (aM!)
  - B.1.7 Start measurement commands with cyclic redundancy check (aMC! and aCC!)
  - B.1.8 Stopping a measurement command
  - B.1.9 Send data command (aD0! aD9!)
- B.2 SDI-12 transparent mode
  - B.2.1 Changing an SDI-12 address
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Campbell Scientific MetSENS200 Instruction Manual

Campbell Scientific MetSENS200 Sensor manual cover

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Campbell Scientific MetSENS200 Sensor Specification

The Campbell Scientific MetSENS200 Sensor is a compact, integrated meteorological sensor designed for accurate and reliable environmental monitoring. This sensor combines a suite of essential atmospheric measurement capabilities into a single, robust unit, making it ideal for both stationary and mobile applications. It is capable of measuring wind speed and direction, air temperature, relative humidity, barometric pressure, and solar radiation. The sensor employs a durable ultrasonic transducer for wind measurements, ensuring precise and maintenance-free operation. Temperature and humidity are assessed using a combined capacitive sensor element, while barometric pressure is gauged with a piezo-resistive sensor.

The MetSENS200 is designed to withstand harsh environmental conditions, featuring a corrosion-resistant housing and an operating temperature range of -40°C to 60°C. Its compact design allows for easy installation across various platforms, including meteorological stations, marine environments, and mobile units. Communication with data loggers or data acquisition systems is facilitated through RS-232 and RS-485 interfaces, supporting both SDI-12 and MODBUS protocols for flexible integration.

The sensor operates with a low power requirement, making it suitable for remote and solar-powered installations. It has a fast response time to changes in environmental conditions, ensuring real-time data transmission for immediate analysis. Data quality is enhanced by in-built signal processing, offering high accuracy and stability. This sensor is particularly beneficial in applications requiring a comprehensive overview of meteorological parameters without the complexity of managing multiple instruments. Overall, the MetSENS200 offers a robust solution for precise environmental monitoring across diverse applications.

Campbell Scientific MetSENS200 Sensor F.A.Q.

How do I install the MetSENS200 sensor?

To install the MetSENS200 sensor, mount it on a stable mast using the provided U-bolt and bracket. Ensure it is level and securely fastened. Connect the sensor cable to a compatible data logger, and configure the logger for appropriate measurements.

What is the correct way to calibrate the MetSENS200 sensor?

The MetSENS200 sensor is factory-calibrated. For field calibration, use a certified reference instrument to compare measurements and adjust the calibration coefficients in the data logger if necessary.

How can I troubleshoot communication issues with the MetSENS200 sensor?

Check cable connections for damage or loose fittings. Verify that the data logger is configured correctly. Use diagnostic software to test communication and ensure the sensor's power supply is stable.

What maintenance does the MetSENS200 sensor require?

Regularly clean the sensor housing and radiation shield to prevent debris accumulation. Inspect and replace desiccant packs as needed to avoid moisture ingress. Perform annual checks on sensor accuracy using a reference instrument.

How do I update the firmware on the MetSENS200 sensor?

Download the latest firmware from Campbell Scientific's website. Connect the sensor to a computer using the appropriate interface, and use the provided software to upload and install the firmware update.

What should I do if the MetSENS200 sensor shows inaccurate temperature readings?

Check for physical obstructions or debris on the sensor. Verify calibration against a known reference. Ensure proper ventilation around the sensor and check for heat sources that could affect readings.

Can the MetSENS200 sensor be used in extreme weather conditions?

Yes, the MetSENS200 is designed for harsh environments. Ensure it is properly mounted and shielded from excessive ice or snow build-up. Regular maintenance checks will help ensure reliability in extreme conditions.

How do I interpret the wind speed and direction data from the MetSENS200 sensor?

Wind speed is usually given in meters per second or kilometers per hour, and direction is in degrees from true north. Use data logger software to convert and analyze the data for trends and patterns.

What power supply is recommended for the MetSENS200 sensor?

The MetSENS200 typically requires a 12V DC power supply. Ensure the power source is stable and capable of providing sufficient current as specified in the sensor's manual.

How can I integrate the MetSENS200 sensor with other meteorological equipment?

The MetSENS200 can be integrated using standard communication protocols such as SDI-12 or RS-232. Ensure data logger compatibility and configure the logger to synchronize data from multiple sensors.