Sierra 840, 860, 830 instruction manual Sensor Maintenance, Sensor Cleaning and Inspection

Models: 840 830 860

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Chapter 4 Maintenance

Series 830/840/860 Instruction Manual

 

 

Caution!

Do not remove the sen- sor cover, this could shift transducer calibration.

Sensor Maintenance

The sensor tube is straight and has a relatively large, 0.031 inch ID, which makes inspection and cleaning easy. Sensor mainte- nance consists of:

inspecting and cleaning the sensor flow path

checking the sensor for proper electrical function

Caution!

When using toxic or cor- rosive gases, purge the unit thoroughly with inert dry gas before discon- necting from the gas line.

Sensor Cleaning and Inspection

Cleaning is accomplished by simply rodding out the sensor with the Sensor Cleaning Stylette, part number “CK”, available from Sierra for this purpose. (A 0.020 inch to 0.028 inch diameter piano wire may also be used.) To access the sensor for inspection or cleaning:

1.Remove the unit from the system.

2.Remove the two socket head ac- cess port plugs with a 1/4 inch Allen wrench.

3.Visually inspect the sensing ports and sensor.

4.Use a hemostat or tweezers to push the cleaning wire into the downstream opening of the sensor tube. Do not force the clean- ing wire; move it back and forth–DO NOT TWIST OR ROTATE.

5.Flush the sensor tube with a non-residuous solvent. In cases where solids are deposited in sensor, units should be returned to factory for complete cleaning and re-calibration.

6.Blow dry all parts with dry nitrogen and re-assemble.

7.When the transducer is re-installed in the system, leak test the connection.

8.Check transducer calibration.

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IM-83/84/86-H

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Sierra 840, 860, 830 instruction manual Sensor Maintenance, Sensor Cleaning and Inspection

840, 830, 860 specifications

The Sierra 860, 830, and 840 are a series of rugged outdoor laptops designed for professionals who require reliable and powerful computing solutions in challenging environments. These laptops combine advanced technologies and robust construction to meet the demands of various fields, including engineering, military, field services, and outdoor research.

One of the standout features of the Sierra series is its rugged design. Constructed with military-grade materials, these laptops are highly resistant to shock, vibration, and extreme temperatures. They have undergone rigorous testing according to MIL-STD-810G standards, which ensures they can withstand harsh conditions whether in the field or during transport. Additionally, the IP65 rating guarantees protection against dust and water exposure, making them invaluable for professionals working in inclement weather or dusty environments.

The Sierra 860, 830, and 840 are powered by high-performance processors, delivering fast and efficient processing capabilities. Equipped with the latest Intel Core processors, including i5 and i7 options, these laptops can handle demanding applications and multitasking with ease. The robust memory options, ranging from 8GB to 32GB, ensure smooth performance for memory-intensive tasks.

Display quality is another critical aspect of these laptops. The Sierra series features high-resolution screens that offer bright, vivid colors and sharp details, making them ideal for tasks requiring precision, such as drafting and design work. The touch-enabled displays enhance user interaction, providing convenience in outdoor settings where traditional input methods may be challenging.

The Sierra laptops also include a comprehensive array of connectivity options, ensuring seamless integration with various devices. With multiple USB ports, HDMI output, and optional mobile broadband, users can easily connect to peripherals, transfer data, and maintain communication. The inclusion of enterprise-level security features, including biometric scanners and encrypted storage, ensures sensitive data remains protected.

Battery life is another crucial factor in fieldwork, and the Sierra series excels in this area. With long-lasting batteries, these laptops can operate for extended periods without needing a recharge, making them perfect for long outdoor excursions or remote job sites.

In summary, the Sierra 860, 830, and 840 combine ruggedness, high performance, and extensive connectivity options, making them exceptional computing solutions for professionals in various challenging environments. Their advanced technologies and robust constructions ensure they can tackle the demands of outdoor work while maintaining reliability and efficiency.