Contents

Revision and Copyright Information
Warranty and Assistance
Table of Contents
USE OF THE AVW1 AND AVW4 WITH GEOKON MODEL 4500 VIBRATING WIRE PIEZOMETERS AND PRESSURE TRANSDUCERS
- 1. GENERAL INFORMATION
  - 1.1 SENSOR SELECTION
  - 1.2 SENSOR CARE AND INSTALLATION
SECTION 2. TEMPERATURE MEASUREMENT
- 2.1 GENERAL
- 2.2 ACCURACY AND RESOLUTION
  - 2.3 PROGRAMMING AND SENSOR HOOK-UP
SECTION 3. VIBRATING WIRE MEASUREMENT
- 3.1 GENERAL
- 3.2 MULTIPLIER & OFFSET
- 3.3 SWEPT FREQUENCY, START AND END
- 3.4 RESOLUTION VS. "# OF CYCLES"
- 3.5 TEMPERATURE CORRECTION
- 3.6 DELAY BETWEEN MEASUREMENTS
SECTION 4. THE AVW1
- 4.1 GENERAL
- 4.2 SENSOR HOOK UP
- 4.3 WELL MONITORING EXAMPLE
SECTION 5. THE AVW4
- 5.1 GENERAL
- 5.2 SENSOR HOOK UP
- 5.3 DATALOGGER PROGRAMMING
APPENDIX A. PRESSURE CONVERSION CHART
APPENDIX B. SCHEMATICS AND STUFFING CHARTS FORAVW1 AND AVW4
APPENDIX C. THEORY AND ADDITIONAL DETAILS
- C.1 SWEPT FREQUENCY THEORY
- C.2 ADDITIONAL THEORY ON MULTIPLIER AND OFFSET
Campbell Scientific Contact Information

Campbell Scientific AVW4 Instruction Manual

Campbell Scientific AVW4 Signal Amplifier manual cover

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Campbell Scientific AVW4 Signal Amplifier Specification

The Campbell Scientific AVW4 Signal Amplifier is a sophisticated device engineered to enhance the capabilities of vibrating wire sensors, offering superior signal amplification and filtering for precise data collection. This four-channel amplifier is designed to work seamlessly with dataloggers, extending the range and reliability of vibrating wire measurements in various environmental monitoring and geotechnical applications. The AVW4 is adept at amplifying weak signals from vibrating wire sensors, ensuring a clear and accurate data transmission over long cable lengths.

The device operates across a wide frequency range, accommodating a diverse array of sensor types and configurations. It features high-input impedance to minimize signal loading, preserving the fidelity of the sensor's output. Advanced filtering techniques are employed to reduce ambient noise and interference, which enhances the accuracy and reliability of the data collected. The AVW4 is compatible with a variety of Campbell Scientific dataloggers, facilitating easy integration into existing monitoring systems.

This signal amplifier is housed in a rugged, weather-resistant enclosure, making it suitable for deployment in harsh field conditions. The AVW4 operates effectively within a broad temperature range, ensuring consistent performance in both hot and cold environments. Power efficiency is optimized to support long-term, unattended operation, with low power consumption that is ideal for remote installations. The robust design and precision engineering of the AVW4 make it an indispensable tool for professionals requiring reliable and accurate data from vibrating wire sensors in challenging conditions.

Campbell Scientific AVW4 Signal Amplifier F.A.Q.

What is the primary function of the Campbell Scientific AVW4 Signal Amplifier?

The Campbell Scientific AVW4 Signal Amplifier is used to amplify and filter vibrating wire signals, allowing them to be more accurately measured by data loggers.

How can I connect the AVW4 Signal Amplifier to a data logger?

To connect the AVW4 to a data logger, use the specified cables to link the output terminals of the AVW4 to the input channels of the data logger, ensuring correct polarity and secure connections.

What are the common troubleshooting steps if the AVW4 is not amplifying signals correctly?

Check the power supply, verify all cable connections, ensure the vibrating wire sensors are functioning, and inspect the AVW4 for any physical damage. Additionally, confirm that the data logger is properly configured.

How can I perform maintenance on the AVW4 Signal Amplifier?

Regularly inspect the AVW4 for physical damage, clean connectors with appropriate contact cleaners, and periodically test its functionality with known inputs to ensure accuracy.

Can the AVW4 Signal Amplifier be used in outdoor environments?

Yes, the AVW4 is designed to operate in harsh environments, but it should be housed in a suitable enclosure to protect it from direct exposure to weather elements.

How do I calibrate the AVW4 Signal Amplifier?

Calibration of the AVW4 should be performed using a known vibrating wire standard. Follow the calibration procedures outlined in the user manual to adjust the gain settings as required.

What power supply is required for the AVW4 Signal Amplifier?

The AVW4 typically requires a 12 V DC power supply. Ensure that the power source is stable and meets the specified voltage and current ratings for optimal operation.

Is it possible to use the AVW4 with multiple vibrating wire sensors simultaneously?

Yes, the AVW4 can be connected to multiple vibrating wire sensors, as it has multiple input channels. Ensure that each sensor is properly configured and connected.

What are the signs that indicate the AVW4 might be malfunctioning?

Signs of malfunction include inconsistent signal outputs, no response from connected sensors, and visible physical damage to the amplifier or its connectors.

How can I ensure accurate measurements with the AVW4 Signal Amplifier?

Ensure all connections are secure, the amplifier is correctly calibrated, and the data logger is configured with the right settings. Regularly check the system for any signs of wear or damage.