Campbell Scientific OBS500 Clear Instruction Manual

Campbell Scientific OBS500 ClearSensor Sensor manual cover
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Campbell Scientific OBS500 ClearSensor Sensor Specification

The Campbell Scientific OBS500 ClearSensor is an advanced turbidity and suspended solids sensor designed for accurate measurement in challenging water environments. It employs dual backscatter and sidescatter technologies, combined with a patented ClearSensor anti-fouling wiper mechanism, which ensures reliable data collection by preventing biofouling and sediment buildup on the sensor's optical surfaces. The device is housed in a robust, corrosion-resistant body suitable for long-term deployment in fresh and saltwater applications.

The OBS500 operates within a wide detection range, providing precise measurements from 0 to 4,000 NTU (Nephelometric Turbidity Units) and 0 to 100 g/L of suspended sediment concentration. It incorporates a high-powered infrared LED light source, functioning at a wavelength of 850 nm, which minimizes interference from ambient light and color in the water. The sensor's output includes both analog and digital signals, offering compatibility with Campbell Scientific dataloggers and other data acquisition systems.

Designed for ease of integration, the OBS500 supports RS-232 and SDI-12 communication protocols, facilitating seamless connectivity to a range of monitoring and control systems. The sensor's efficient power consumption is optimized for remote and solar-powered applications, with a voltage requirement of 10 to 15 VDC and a quiescent current draw of less than 1 mA.

The OBS500's operational temperature range spans from -5°C to 50°C, ensuring reliable performance in various climatic conditions. Its compact design, featuring dimensions of 42 mm in diameter and 175 mm in length, allows for convenient installation in diverse aquatic settings. Overall, the Campbell Scientific OBS500 ClearSensor combines innovative optical technology with durable construction, delivering precise and dependable turbidity and suspended solids measurements for environmental monitoring and research applications.

Campbell Scientific OBS500 ClearSensor Sensor F.A.Q.

What is the optimal installation location for the OBS500 ClearSensor Sensor?

The OBS500 should be installed in a location where it can accurately measure turbidity without interference from nearby structures or debris. Ideally, place it in a stable flow area where sediment can naturally settle.

How do I perform a calibration check on the OBS500 sensor?

A calibration check can be performed by immersing the sensor in a solution with a known turbidity value and verifying that the sensor readings match the expected values. Regular calibration checks ensure measurement accuracy.

What maintenance procedures are recommended for the OBS500 sensor?

Regular maintenance includes cleaning the sensor with fresh water to remove biofouling, inspecting the optical windows for damage, and checking cable connections for signs of wear.

How can I troubleshoot erratic readings from the OBS500 sensor?

Erratic readings can be caused by air bubbles, fouling, or electrical issues. Inspect the sensor for biofouling, ensure it is submerged correctly, and check all connections and power supplies for stability.

What are the power requirements for the OBS500 ClearSensor Sensor?

The OBS500 typically requires a 12 VDC power supply. Ensure the power source is stable and capable of providing sufficient current to support continuous sensor operation.

Can the OBS500 sensor be used in saltwater environments?

Yes, the OBS500 is designed to be used in both freshwater and saltwater environments. However, regular maintenance is crucial in saltwater to prevent corrosion and biofouling.

How do I clean the optical windows of the OBS500 sensor?

Use a soft cloth or sponge with mild detergent and water to clean the optical windows. Avoid abrasive materials that can scratch the surface. Rinse thoroughly with fresh water after cleaning.

What data output formats are available with the OBS500 sensor?

The OBS500 supports multiple data output formats, including SDI-12 and RS-232, allowing for integration with various data logging and telemetry systems.

How can I integrate the OBS500 sensor with a data logger?

To integrate the OBS500 with a data logger, connect the sensor using the appropriate communication protocol, such as SDI-12 or RS-232, and configure the data logger to read the sensor output.

What should I do if the OBS500 sensor does not power on?

Check the power supply and connections to ensure they are secure and providing the correct voltage. Inspect the sensor cable for any signs of damage, and verify that the power source is functioning properly.