Dual Gas Path Calibration Cap for Stable Sensor Bump Testing
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Solution Overview
Problem
The challenge of maintaining accurate sensor calibrations and bump tests in field conditions is complicated by environmental contaminants, requiring additional gas bottles that increase costs, time, and safety risks, while existing solutions lack a stable and trustworthy baseline.
Innovation Solution
An apparatus with a housing and dual gas paths, including a filter and valves, allows for efficient sensor calibration and bump testing using a single gas standard bottle, with optional humidity compensation, ensuring accurate gas concentration and reducing equipment needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a second clean gas bottle is carried to provide a stable baseline for calibration, then measurement precision is improved, but device complexity and safety risks increase
Solution Approach 1:
The gas bottle is divided into two separate gas paths: a first gas path containing a filter for providing clean baseline gas, and a second gas path for providing calibration gas. This segmentation allows one gas bottle to fulfill the function of two bottles, eliminating the need to carry multiple bottles while maintaining calibration accuracy.
Solution Approach 2:
A filter is introduced as an intermediary component in the first gas path to clean the gas from the single gas bottle, transforming it into a reliable baseline source. This intermediary enables the single gas bottle to provide both clean baseline gas and calibration gas through different paths.
2Reliability
If a second clean gas bottle is carried to provide a stable baseline, then reliability is improved, but loss of time and labor cost increase
Solution Approach 1:
The gas delivery system is segmented into two independent gas paths within a single bottle, allowing simultaneous access to clean baseline gas and calibration gas. This eliminates the time required to switch between multiple bottles while maintaining baseline stability.
Solution Approach 2:
The single gas bottle is designed to serve multiple functions: providing clean baseline gas through the first gas path with filter, and providing calibration gas through the second gas path. This multi-functionality reduces the number of operations needed while ensuring reliable baseline conditions.
3Measurement precision
If a second clean gas bottle is carried, then measurement precision is improved, but safety risks worsen
Solution Approach 1:
The internal segmentation of the single gas bottle into filtered and unfiltered gas paths eliminates the need to carry multiple bottles, reducing the physical burden and safety hazards associated with handling multiple gas cylinders in the field.
Solution Approach 2:
The filter acts as a safety intermediary by providing clean gas internally without requiring external clean gas bottles. This eliminates the need for technicians to handle and transport multiple heavy gas bottles, particularly on high towers, reducing fall risks and handling hazards.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus maintains calibration accuracy and reduces the need for extra gas bottles, minimizing costs and safety concerns while providing a stable baseline for sensor testing.
Implementation Method 1
The first gas path has a filter which filters the gas passing therethrough
Data Source
AI summary
An apparatus performing sensor calibrations and bump tests includes a housing having first and second gas paths. The first gas path has a filter for filtering gas passing therethrough. A three-way valve may be provided between the inlet and the paths. A first valve may be provided between the inlet and the first path and a second valve may be provided between the inlet and the second path. Gas flows through the first path upon activation of the valve(s) to a first condition, and gas flows through the second path upon activation of the valve(s) to a second condition. A calibration cap is coupled to the outlet and to a sensor. A gas standard bottle is coupled to the inlet. A method of using same is also disclosed.