EAGLE 2 Gas Monitor Overview and Safety

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Questions and Answers

What component allows for comfortable holding of the EAGLE 2 instrument?

The bottom case

The sintered metal flame arrestor

The removable battery case

The sturdy, well balanced handle (correct)

Where are the sensors located in the EAGLE 2?

In the battery compartment

On the LCD display

Outside the top case

Inside the bottom case in the flow chamber (correct)

Which gas is NOT detected by the EAGLE 2 sensors?

Carbon monoxide (CO)

Methane (CH4) (correct)

Hydrogen sulfide (H2S)

Oxygen (O2)

What is the purpose of the sintered metal flame arrestor in the LEL sensor?

To allow gas to diffuse into the sensor Signup and view all the answers

What detection principle does the catalytic combustible gas sensor utilize?

Electrical resistance change Signup and view all the answers

How many screws hold the top case and bottom case together in the EAGLE 2?

Three screws Signup and view all the answers

What is the function of the thumbscrew on the EAGLE 2?

To secure the battery case Signup and view all the answers

What is the primary function of the EAGLE 2 gas monitor?

To detect the presence of various gases Signup and view all the answers

Which gases can the EAGLE 2 gas monitor detect simultaneously?

Combustible gas, oxygen, carbon monoxide, and hydrogen sulfide Signup and view all the answers

How many gas sensors are included in the standard configuration of the EAGLE 2?

Four sensors Signup and view all the answers

What is the recommended mode for typical confined space or area monitoring with the EAGLE 2?

Normal Mode Signup and view all the answers

In which environments should batteries be changed or charged for the EAGLE 2 gas monitor?

In nonhazardous areas only Signup and view all the answers

Which of the following is NOT one of the gases detected by the EAGLE 2 gas monitor?

Nitrogen dioxide Signup and view all the answers

Which feature of the EAGLE 2 gas monitor is emphasized for its use in tough environments?

Rugged design Signup and view all the answers

What happens to the power of the combustible sensor when an over scale concentration of combustible gas is detected?

It turns off temporarily to prevent damage. Signup and view all the answers

Which of the following can adversely affect the performance of a catalytic combustible sensor?

High concentrations of silicone vapors. Signup and view all the answers

What is the purpose of the integral H2S scrubber in the catalytic combustible sensor?

To protect from exposure to H2S during normal use. Signup and view all the answers

How can a user change the displayed detection units of the catalytic combustible channel on the EAGLE 2?

By using the RANGE ▼ SHIFT button. Signup and view all the answers

What concentration level does the combustible catalytic channel detect in ppm when set for methane?

50,000 ppm. Signup and view all the answers

What should be avoided to ensure that the combustible sensor remains effective?

Exposure to high levels of combustible gas. Signup and view all the answers

What effect can concentrations of combustible gas greater than 100% LEL have on the sensor calibration?

They can affect the zero level or calibration. Signup and view all the answers

When monitoring combustible gas, what indication may suggest a hazardous gas concentration above the LEL?

A rapid increase followed by erratic readings. Signup and view all the answers

Study Notes

Operation and Safety Warnings

Understand the manual before operating the EAGLE 2 gas monitor.
Substitution of components may impair the device's intrinsic safety.
Battery changes or charging must only occur in nonhazardous areas to prevent ignition risks.
Not tested for use in oxygen-enriched environments (above 21% concentration).
Refer to ISA-RP12.13, Part II-1987 or similar guides for combustible gas detection instrument usage.

EAGLE 2 Overview

The EAGLE 2 gas monitor features an advanced detection system with up to six sensors.
Capable of detecting combustible gas, oxygen (O2), carbon monoxide (CO), hydrogen sulfide (H2S), and other toxic gases simultaneously.
Designed for various applications, including sewage treatment, utility manholes, tunnels, hazardous waste sites, power stations, petrochemical refineries, mines, paper mills, drilling rigs, and firefighting.

Features of the EAGLE 2

Monitors one to six gases concurrently; the standard configuration includes four sensors for combustible gases, oxygen, CO, and H2S.
Offers three operating modes: Normal Mode for typical confined space monitoring, with a factory-default setting.
Rugged design with comfortable handle, LCD window, and removable battery case.
Gasketed interfaces enhance safety and functionality.
Raised feet design ensures stability during operation.

Sensor Functionality

EAGLE 2 utilizes up to six sensors located within the bottom case for gas monitoring.
Standard sensors include several types: PID sensors, ESM-01 toxic sensors, TC sensors, and infrared sensors for CO2, methane, and hydrocarbons.

Catalytic Combustible Gas Sensor

The catalytic combustible gas (LEL) sensor detects combustible gases in the %LEL range.
Operates by measuring changes in resistance due to gas reacting with oxygen on a catalyst.
Current changes are amplified, converted to concentration measurements, and displayed on the LCD.
Features a sintered metal flame arrestor for safe gas diffusion into the sensor.

Hazard Warnings and Sensor Care

Caution against exposing the catalytic sensor to high concentrations of combustible gases, which can damage the sensor and affect performance.
Rapid increases in gas readings may indicate dangerous gas concentration levels.
Specific gases can contaminate the sensor, degrading its ability to detect combustible gases effectively.

Detection Range and Settings

EAGLE 2 allows users to switch detection units of the catalytic combustible channel between %LEL, ppm, and %volume using the RANGE ▼ SHIFT button.
Detection range corresponds to 0-100% LEL for the configured gas—for example, methane’s (CH4) LEL is 5% volume or 50,000 ppm.

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Description

This quiz covers the operation, safety warnings, and features of the EAGLE 2 gas monitor. It emphasizes understanding the manual, appropriate usage environments, and the monitor's capability to detect multiple gases simultaneously. Ideal for professionals in hazardous work environments.