Cologne, Germany (August 20, 2018) +++ Inficon GmbH from Cologne, Germany, one of the world’s leading manufacturers of instruments and devices for leak testing (www.inficon.com), presents its newly developed LDS3000 AQ at this year’s Chillventa (Nuremberg, Germany, October 16 – 18, 2018, Hall 8/Booth 319). Inficon has designed the LDS3000 AQ for leak testing by the accumulation method. Helium or forming gas are used as detection gas. The new detector has a very low detection limit, measures continuously and detects leaks in the range of 10 -5 mbar·l/s in practical use. This is a particular advantage for testing for refrigerant and liquid leaks in heat pump components.
Cost-effective and reliable: Automated testing in the accumulation chamber
The accumulation method has been proven for years with Inficon’s T-Guard tester: The test object exposed to tracer gas under pressure is placed in a simple accumulation chamber, which must meet significantly less stringent sealing requirements than a vacuum chamber. Therefore, the accumulation method is much more cost-effective than vacuum testing. The tracer gas escapes from any leaks in the test piece and accumulates in the test chamber. The leak rate is calculated from the quantity of gas that accumulates within a defined time interval in the given volume of the test chamber. Particularly advantageous: Refrigerant and water circuits of a heat pump can thus be tested for tightness at the same time, which saves a lot of time. The accumulation chamber can reach a size of up to 1000 litres, depending on the volume of the test object.
Helium contaminated environments are no longer a problem
Precisely during the production of heat pumps, an increased concentration of helium occurs again and again in the production hall, which can negatively influence the sensitivity of measurements. The new LDS3000 AQ uses a mass spectrometer with integrated turbopump as a sensor and is therefore ideally suited for an environment contaminated with helium. The LDS3000 AQ can use both helium and forming gas (a non-flammable mixture of 95 percent nitrogen and 5 percent hydrogen) as tracer gases. Even with forming gas, the device still detects leaks down to the range of 10 -5 mbar·l/s.
Automation instead of manual sniffing
Through automated processes, the accumulation method ensures reliable results with very high repeatability at all times. The manual and thus erroneous sniffing is no longer necessary. Since the LDS3000 AQ also allows longer measurements of up to 15 minutes, larger components or parts with very low leak rates can also be tested.
The accumulation chamber should be designed for the respective test object to ensure optimum gas distribution by means of fans and to keep the dead volume of the chamber low. The LDS3000 AQ is not only suitable for leak testing of the heat exchanger unit, but also for quality testing of the heat storage tank of a heat pump. Here, too, the measuring device scores with speed: It automatically tests the various water circuits of a heat accumulator.
Fieldbus interface for Industry 4.0 integration
If necessary, the leak testing with the LDS3000 AQ should be preceded by a simultaneous burst and coarse test. If the test piece is leaky, a manual sniffer leak search must follow for localisation. Like the T-Guard, the LDS3000 AQ is also equipped with modern fieldbus interfaces. Inficon’s test devices are thus Industry 4.0 ready and can be networked for complete data exchange.
For more information contact INFICON GmbH Möller Horcher Public Relations GmbH
Volker Trieb Julia Schreiber, Cologne,Germany.
Phone: +49(0)221-56788-634 Phone: +49 (0)3731-2070-915
Email: [email protected] Email: [email protected]