Vacuum Testing
Vacuum Testing - Related Videos
06:20
Proper Operation of Vacuum Based Equipment
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2023
Source: Robert M. Rioux, Ajay Sathe & Zhifeng Chen, Pennsylvania State University, University Park, PA Vacuum is required for a number of laboratory procedures. This is most routinely achieved in the laboratory by the use of vacuum pumps. In addition to working at low pressures, vacuum pumps can also be used to enable rapid changing of the atmospheres in a reactor or flask by evacuation and backfilling.
09:26
How to Build a Vacuum Spring-transport Package for Spinning Rotor Gauges
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Cited by 1 •
2016
Here we describe how to build a robust spring-transport mechanism for a spinning rotor gauge. This device securely immobilizes the rotor and keeps it under vacuum during transportation. We also describe packaging that minimizes the risk of damage during transport. Tests show our design works for typical shocks during transport.
07:49
Development of an Experimental Setup for the Measurement of the Coefficient of Restitution under Vacuum Conditions
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Cited by 11 •
2016
The coefficient of restitution is a parameter that describes the loss of kinetic energy during collision. Here, a free-fall setup under vacuum conditions is developed to be able to determine the coefficient of restitution parameter for particles in micrometer range with high impact velocities.
03:03
Inoculating a Bacterial Pathogen into Arabidopsis Leaves via Vacuum Infiltration
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2026
Source: Rufián, J. S., et.al. Single-Cell Analysis of the Expression of Pseudomonas syringae Genes within the Plant Tissue. J. Vis. Exp. (2022)This video demonstrates a vacuum infiltration method to introduce a bacterial pathogen into Arabidopsis plant leaves. The approach uses a prepared bacterial suspension and vacuum pulses to enable uniform entry through stomata, resulting in controlled leaf infection.
07:47
Anxiety Testing
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2023
Anxiety is a commonly observed behavioral disorder that stems from fear. It is described as increased restlessness, or unpleasant feelings of fear over anticipated events. Experimenters often use rodent models to better understand anxiety disorders in humans. They use different paradigms, like exposing rodents to bright spaces or loud sounds, which are known to induce fear. These tests combined with other interventions such as surgery or drug-administration may assist researchers in pinpointing...
FAQs
Pumps reduce the amount of gas in the system, while gauges quantify the resulting pressure over the ranges relevant to the experiment or device. Their roles are complementary: pumping establishes the intended condition, and measurement shows whether that condition has been reached and maintained. This combination helps distinguish insufficient evacuation from other performance problems.
Pressure-change testing evaluates unwanted gas entry by monitoring how the system pressure changes after evacuation. Tracer-gas methods instead identify gas entering through a leak by detecting a selected tracer. The two approaches provide different evidence about leak tightness, allowing testing to be matched to the system and the information needed before operation.
Materials or surfaces inside an evacuated system can release residual gases, a process that can interfere with the intended pressure condition. Contamination can likewise compromise the environment required by sensitive equipment or physical measurements. Detecting these problems helps explain why a system fails to achieve reliable performance even when its main enclosure appears leak tight.
Pressure behavior can indicate whether evacuation and gas control are adequate for the intended application. An unexpected pressure change may point to unwanted gas entry, while persistent difficulty reaching the required condition can reveal outgassing or inadequate pumping. Interpreting these outcomes helps locate the source of unreliable operation before measurements or device use begins.
A typical workflow evacuates the system with pumps, measures pressure using gauges suited to the relevant range, and evaluates leak tightness through pressure monitoring or tracer-gas detection. The results are then compared with the intended operating condition. This sequence checks both the achieved pressure and the causes of any failure to maintain it.
Researchers and engineers apply Vacuum Testing to vacuum chambers, electron-beam instruments, semiconductor equipment, and space-simulation systems before operation. In these settings, controlling residual gases supports dependable experiments and device performance. Testing can expose leaks, contamination, outgassing, or inadequate pumping, helping confirm that the equipment meets its specified pressure conditions.