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Swema channel Test

Elma Instruments
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Even small leaks can quickly result in five to ten percent of the air in the ventilation ducts leaking out of the system. An air gap of ten percent means that the installation will use 33 percent more energy to maintain the same power as a installation without leaks. Therefore, it is a good business to measure whether the ventilation ducts are tight. On average, Danish companies can achieve a high power saving for ventilation by focusing on closer ventilation channels. Closer channels mean that a larger part of the heated air in the ventilation system can be used, thus reducing the heat loss, like energy consumption. In addition, noise from the ventilation system is reduced, which at the same time provides optimal and easier to ensure a comfortable indoor climate for the company's employees. Elma Instruments now offers Swema Channel Test for Density Control of Ventilation Channels in accordance with Danish / European Standard: DS / EN 12237 and DS / EN 1507. When connecting either Type-K temperature sensor or even better, the more precise heating wire probe (SWA31) to Swema3000md, the measurements along with the built-in barometer will take place under 100% density compensation. The equipment operates in such a manner that the external pressure sensor via differential pressure measures the supplied airflow through the measurement flange. The internal pressure sensor in the Swema3000md measures the applied overpressure in the channel to be pressurized. In Swema3000 enter the area of ​​the pressure tested duct (A = 2r * phi * l), density class (A, B, C or D) and the gauge k factor (read on the measurement flange). When the actual pressure test is started, run the Channel Test, controlled by Swema3000md via the inverter, first up to a 100 Pa overpressure in the channel. Once the measurement has stabilized, the specific leakage amount ((l / s) / m2) appears on the display. With a simple push of "arrow up" on Swema3000md, applied pressure in increments of 100 Pa is raised until the channel system is tested with a total of 400 Pa overpressure. The specific leakage amount is displayed for each print step in the display after the test, which of course can easily be stored in the instrument's memory and later transferred to, for example, PC, for further documentation. In addition to the specific amount of leakage shown in the display, a test test or test failed after the test is shown in relation to the entered classification. Hereby the possibility of error interpretation of the result is impossible. Swema Channel Tester can, with the supplied "large measuring pipe", pressure test plant with a channel wall area between 17 - 91 m2, pressure tested in relation to density class A (the most demanding class for the instrument). Under accessories you will find the "small gauge tube" used for pressure testing if the area of ​​the pressure-tested duct wall is between 3 - 25 m2 (density class A). The unit is built into a rugged carrying rack that makes it easier to transport, as the overall assembly weighs good 18kg. The equipment consists of a radial fan with frequency converter, various hoses, large measuring tube (17m2? Area? 91m2). In order to conduct a density test of a channel, in addition to the channel test, a Swema3000md measuring instrument and a SWA10 pressure transducer must be used.