Contents

Revision and Copyright Information
Limited Warranty
Assistance
Safety
Table of Contents
1. Introduction
2. Precautions
3. Initial Inspection
4. Overview
5. Specifications
- 5.1 Physical Description
- 5.2 Measurement Parameters
- 5.3 Electromagnetic Compatibility
6. Installation
7. Operation
- 7.1 Probe Offset for Water Content Measurement
- 7.2 Probe Constant for Electrical Conductivity Measurement
  - 7.2.1 Electrical Conductivity Error from Attenuation
- 7.3 Water Content Measurement Error from Cable
- 7.4 Water Content Measurement Error from Soil Electrical Conductivity
8. References
Campbell Scientific Companies

Campbell Scientific TDR CS605 Instruction Manual

Campbell Scientific TDR CS605 Sensor manual cover

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Campbell Scientific TDR CS605 Sensor Specification

The Campbell Scientific TDR CS605 Sensor is a highly specialized instrument designed for accurate measurement of soil moisture content. It operates using Time Domain Reflectometry (TDR), a technique that measures the travel time of an electromagnetic pulse through the soil. This sensor is specifically engineered to offer reliable, real-time data crucial for agricultural research, environmental monitoring, and hydrological studies.

The CS605 sensor is constructed using robust materials, ensuring durability and long-term performance in diverse field conditions. It consists of a stainless-steel probe with three rods, each 30 cm in length, which are inserted directly into the soil. The sensor's design minimizes soil disturbance and provides a representative measurement of the surrounding soil moisture.

Functionally, the CS605 is compatible with Campbell Scientific dataloggers, enabling seamless integration into existing data collection systems. The sensor operates within a range of -40 to 60 degrees Celsius, making it suitable for various climates. Its measurement range spans from 0 to 100% volumetric water content, with an accuracy of ±2% for typical mineral soils and ±3% for less typical soils, ensuring high precision in moisture content readings.

The sensor requires a TDR100 or TDR200 reflectometer from Campbell Scientific to operate, which processes the TDR signals and calculates the apparent dielectric permittivity of the soil. This dielectric constant is then used to determine the soil moisture content. The CS605's non-destructive measurement approach allows for repeated use in the same location without altering soil properties.

Overall, the Campbell Scientific TDR CS605 Sensor is an essential tool for researchers and professionals seeking precise soil moisture data, facilitating informed decision-making in irrigation management and environmental assessments.

Campbell Scientific TDR CS605 Sensor F.A.Q.

How do I install the Campbell Scientific TDR CS605 Sensor?

To install the CS605 sensor, connect the probes to the TDR100 using the provided coaxial cable. Ensure the installation site is free of debris and properly prepare the soil to achieve good contact between the probes and the soil. Insert the probes vertically into the soil to the desired depth.

What are the typical maintenance procedures for the CS605 sensor?

Regularly inspect the sensor and cables for physical damage. Clean the probes gently with water and a soft brush to remove soil or mineral deposits. Check and recalibrate the sensor as needed to ensure accurate readings.

How can I troubleshoot inaccurate readings from the CS605 sensor?

Ensure that the sensor is properly installed and that the connectors are secure. Check for soil compaction or air gaps around the probes. Verify the sensor calibration and inspect for any cable damage.

What is the recommended depth range for the CS605 sensor installation?

The CS605 sensor can be installed at various depths depending on the measurement requirements. However, it is commonly installed at depths ranging from 0 to 90 cm to capture soil moisture profiles effectively.

Can the CS605 sensor be used in saline soils?

Yes, the CS605 sensor is designed to work in various soil types, including saline soils. However, in highly saline conditions, regular maintenance and calibration checks are recommended to ensure accurate measurements.

How do I connect the CS605 sensor to a data logger?

Connect the sensor to a compatible Campbell Scientific data logger using the coaxial cable. Configure the data logger with the appropriate settings for the CS605, including measurement interval and calibration parameters.

What should I do if the CS605 sensor does not power on?

Check the power supply and ensure that the connections are secure. Verify that the data logger or power source is functioning properly. If the issue persists, inspect the cables for damage and consult the manufacturer's support.

How can I prevent damage to the CS605 sensor during installation?

Use caution when inserting the probes into the soil to avoid bending or breaking them. Ensure the soil is prepared and free of rocks or other obstructions. Use proper tools and techniques to ensure even pressure during installation.

What is the impact of temperature on the CS605 sensor readings?

Temperature can affect the dielectric constant of the soil, which in turn affects the sensor readings. The CS605 includes temperature compensation algorithms, but extreme temperatures may still require additional calibration checks.

How can I extend the lifespan of the CS605 sensor?

Regular maintenance, proper storage during off-seasons, and protecting the sensor from physical damage and extreme weather conditions can help extend its lifespan. Ensure that the installation and removal procedures are followed carefully.