On the surface, leak testing may appear simple and straightforward. In reality, however, the determination of the leak testing system that is ideally suited for an application can be deceivingly complex. The following are three must-ask questions that should be answered before making a decision on a leak tester.
What is an automatic production leak tester?
Automatic production leak testers are those types of testers that perform the leak test cycle without operator attention or interpretation.
Today’s sophistication in leak testing no longer allows a simple leak test. Typical testing normally requires:
A complete automatic cycle performs the leak test from start to finish, displays quantitative results and the accept or reject status. Accept or reject limits are programmable by the user.
The most common types of leak tester are:
Fully automatic production leak testers typically perform leak cycles of less than 0.9 to 30 seconds. These testers communicate with programmable logic controllers (PLC). These testers:
What should I look for in a leak tester supplier?
Be sure that the leak tester supplier selected is experienced and can offer the leak testing technique that fits your application and requirements—not just the technique that he offers.
In other words, be sure that the supplier is not offering just one technique and must sell it as "the best way." The leak tester supplier should offer and support the following techniques:
The pressure decay and vacuum decay testing are the most popular because of ruggedness and simplicity.
With these techniques available, a supplier can honestly evaluate requirements and recommend the best technique for a specific application.
Remember, when a purchase is made from a qualified and trusted supplier, a measure of security and guaranteed performance can be expected.
Look for quality registrations such as ISO 9001, CSA (Canadian standards) and CE MARK (European requirement). These registrations will ensure additional quality, documentation and solid software.
Correct tooling and design is most important to the success of a leak test project. A supplier should be well experienced in this area.
What specifications should be provided to the supplier?
If testing parameters are available, provide them to the supplier in a format as follows:
If the test parameters are not available, explain the test application or any problems to the supplier. He should have years of application experience and be able to help set the parameters and recommend a system that is right for the application at hand.
For a new product, a number of variables should be considered when setting the leak test specifications. Answers to the following questions will be helpful:
Damage to people or surroundings
Possible fire or explosion
Cost to the user
Unsightly or displeasing environment
Next month Training Trends will explore major considerations when purchasing a leak tester.
For more information, contact Uson L.P. (Houston) at (281) 671-2000.