College

We appreciate your visit to What test gas should be used to check the span during calibration of a combustible gas or hydrocarbon gas detector Select the ONE best answer. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

What test gas should be used to check the span during calibration of a combustible gas or hydrocarbon gas detector? Select the ONE best answer.

A. A known concentration of butane in nitrogen.

B. A known concentration of butane in oxygen.

C. A known concentration of butane in air.

D. Fresh air.

Answer :

To properly calibrate a combustible gas or hydrocarbon gas detector, selecting the appropriate test gas is crucial. The purpose of calibration is to ensure that the detector accurately measures the presence of combustible gases.

Gas detectors are typically calibrated using a known concentration of a specific gas mixed with an appropriate balance gas. For combustible or hydrocarbon gas detectors, the balance gas commonly used is air because it best mimics the environment in which these detectors usually operate.

Therefore, the best test gas for checking the span during calibration of a combustible gas or hydrocarbon gas detector is a known concentration of butane in air.

Here's why this choice is appropriate:

  1. Environment Simulation: Using air as a balance gas simulates the actual environmental conditions where the gas detector is used, ensuring accurate calibration.

  2. Detector Specifications: Most gas detectors are designed to calculate gas concentrations based on the presence of air, as it allows for accurate and consistent calibration.

  3. Safety and Accuracy: Butane is a typical hydrocarbon used in calibration due to its similar properties to many other hydrocarbons, providing an accurate benchmark for span checking.

Thus, among the provided options, the test gas that should be used is a known concentration of butane in air.

Thanks for taking the time to read What test gas should be used to check the span during calibration of a combustible gas or hydrocarbon gas detector Select the ONE best answer. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada