Contents

Revision and Copyright Information
Warranty and Assistance
Table of Contents
HydroSense Soil Water Measurement System (CD620, CS620)
- 1. General Description
  - 1.1 Introduction
  - 1.2 HydroSense Modes
- 2. Specifications
- 3. Unpacking and Setup
- 4. Water Content Measurement Mode
  - 4.1 Introduction
  - 4.2 Display Information
  - 4.3 Description of Water Content Measurement Mode
  - 4.4 Selecting Probe Rod Length
  - 4.5 Measuring Volumetric Water Content
  - 4.6 Measurements in Special Materials
- 5. Water Deficit Mode
  - 5.1 Description of Water Deficit Mode
  - 5.2 Display Information
  - 5.3 CalibrationSetting the Lower and Upper Reference Levels
  - 5.4 A Water Deficit Mode Example
- 6. Proper Measurement Technique and Method Limitations
  - 6.1 Probe Rod Insertion
  - 6.2 Soil Factors Which Can Affect the MeasurementClay, Soil Electrical Conductivity, Organic Matter and Rocks
  - 6.3 Rod Length and Insertion Angle
  - 6.4 Interpreting Measurement Results
- 7. Description of HydroSense Measurement Method
- 8. Maintenance
  - 8.1 Replacing Battery
  - 8.2 Rod Installation/Replacement
Appendix A. Definition of Water Content Terms
- A.1 Definition of Water Content Terms
Appendix B. How Many Soil Water Content Measurements Are Enough
- B.1 Introduction to Spatial Variability
- B.2 An Example
- B.3 Some Background on Confidence Intervals
- B.4 Determining the Minimum Number of Samples
Campbell Scientific Contact Information

Campbell Scientific HydroSense CD620 Instruction Manual

Campbell Scientific HydroSense CD620 System manual cover

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Campbell Scientific HydroSense CD620 System Specification

The Campbell Scientific HydroSense CD620 System is an advanced soil moisture measurement solution designed to provide accurate and rapid assessments of soil water content. This system integrates cutting-edge technology with user-friendly features, making it ideal for applications in agriculture, horticulture, and environmental research. At its core, the CD620 utilizes Time Domain Reflectometry (TDR) to measure soil moisture, offering precise data by analyzing the transmission and reflection of electromagnetic waves in soil. The device is equipped with a robust and ergonomic handheld display, ensuring ease of use and efficient data collection in the field.

The HydroSense CD620 System includes a pair of stainless steel rods that serve as waveguides, available in various lengths to accommodate different soil types and depths. The system's portable design allows for quick deployment and mobility across diverse terrains, while its intuitive interface facilitates straightforward operation even for users with minimal technical expertise. Data obtained from the CD620 can be stored and transferred via USB or wireless connectivity options, streamlining integration with other data management systems.

Engineered to withstand challenging environmental conditions, the HydroSense CD620 is housed in a durable, weather-resistant casing, ensuring reliability and longevity in field use. It operates efficiently within a wide temperature range, accommodating diverse climates and geographic locations. The system's high-resolution measurements and rapid response times enable users to make informed decisions about irrigation management, crop health, and soil conservation efforts. Overall, the Campbell Scientific HydroSense CD620 System represents a blend of precision, durability, and ease of use, making it an essential tool for professionals seeking accurate soil moisture measurements.

Campbell Scientific HydroSense CD620 System F.A.Q.

How do I set up the HydroSense CD620 for the first time?

To set up the HydroSense CD620, begin by installing the batteries in the display unit. Connect the probe to the display unit, power on the device, and calibrate it according to the soil type you are working with. Refer to the user manual for detailed calibration steps.

What should I do if the HydroSense CD620 is not turning on?

First, ensure that the batteries are correctly installed and fully charged. Check the battery contacts for any corrosion or dirt. If the problem persists, try replacing the batteries or contact Campbell Scientific support for further assistance.

How can I interpret the soil moisture readings from the HydroSense CD620?

The HydroSense CD620 provides soil moisture content as volumetric water content (VWC). To interpret the readings, compare them against the known field capacity and wilting point of your soil type. This will help you determine irrigation needs.

Is it possible to use the HydroSense CD620 in saline soils?

The HydroSense CD620 can be used in saline soils, but the readings may be affected by the soil's electrical conductivity. It is recommended to perform a site-specific calibration to improve accuracy in saline conditions.

How often should I calibrate my HydroSense CD620 system?

Calibration frequency depends on the accuracy requirements and environmental conditions. Generally, recalibration is recommended if there is a significant change in soil type or if the device has been exposed to extreme environmental conditions.

What maintenance is required for the HydroSense CD620?

Regular maintenance includes cleaning the probe after each use, checking for physical damage, and ensuring the batteries are charged. Periodically verify the calibration and store the device in a dry, cool place when not in use.

Can I use the HydroSense CD620 for continuous monitoring?

The HydroSense CD620 is designed for spot measurements rather than continuous monitoring. For continuous data logging, consider integrating it with a compatible data logger or explore other Campbell Scientific solutions designed for continuous monitoring.

What should I do if the readings seem inaccurate?

If readings appear inaccurate, check the probe for dirt or damage, ensure it is inserted fully into the soil, and verify the calibration settings. If the issue persists, recalibrate or contact support for further troubleshooting.

How do I change the measurement units on the HydroSense CD620?

To change the measurement units, access the settings menu on the display unit. Navigate to the units section and select the desired measurement unit (e.g., inches or centimeters). Refer to the user manual for detailed instructions.

What are the best practices for storing the HydroSense CD620?

Store the HydroSense CD620 in a dry, cool environment. Remove the batteries if the device will not be used for an extended period to prevent battery leakage. Clean the probe and ensure all parts are dry before storage.