Sierra 860, 840, 830 instruction manual Flow Meters and Flow Controllers with Electromagnetic Valves

Models: 840 830 860

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Chapter 5 Troubleshooting

Series 830/840/860 Instruction Manual

 

 

Flow Meters and Flow Controllers with Electromagnetic Valves

Problem

Possible Cause

Solution

No output

Clogged sensor

Clean or replace sensor

 

PCB defective

Repair or replace PCB

 

Inlet filter screen clogged

Clean or replace screen

Unit will not zero

Gas leak

Find and correct leaks

 

Application requires high pressure and

Re-zero transducer

 

non-horizontal mounting

 

 

PCB defective

Repair or replace PCB

Controller does not

Low or no gas pressure

Set correct gas pressure

respond to set point

Faulty cable or connector

Correct or replace

 

 

Set point is below 2% of full scale

Increase set point or disable auto

 

 

shut off circuit

Flow does not match set point

No gas pressure

Set correct gas pressure

 

Inlet filter screen clogged

Clean or replace

 

Out of adjustment

Adjust R22 balance on 840 models,

 

 

consult factory for others

Reads full scale with no flow

Defective sensor

Return to factory for replacement

or with valve shut

Gas leak

Find and correct leaks

 

Out of calibration

Dirty or clogged sensor

Clean or replace sensor

 

Change in composition of gas

See K-factory tables

 

Gas leak

Find and correct leaks

 

PCB defective

Repair or replace PCB

 

LFE dirty

Clean LFE

 

Inlet filter screen clogged

Clean or replace screen

 

Incorrect inlet conditions (high flow and

Re-plumb transducer correctly

 

NPT models)

 

5-2

IM-83/84/86-H

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Sierra 860, 840, 830 instruction manual Flow Meters and Flow Controllers with Electromagnetic Valves

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.