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Dust tests are mainly performed to test functioning of electronic components under extreme environmental conditions. Various standards specify e.g. the test duration and the composition of dust used. The dust is filled in the funnel below the test space. The formation of dust within the test space is effected by compressed air injection through four special nozzles. The dust is blown and swirled in upper test space by intensive air movement. Dust tests are mainly performed to test functioning of electronic components under extreme environmental conditions. Various standards specify e.g. the test duration and the composition of dust used. The standard SAE J 575 is performed with three to five kilograms unburnt Portland cement (according to ASTM C 150-77). Portland cement is especially characterized by its fine grain size. This dust is filled in the funnel below the test space. The formation of dust within the test space is effected by compressed air injection through four special nozzles. The dust is blown and swirled in upper test space by intensive air movement. The pulse time for this action is 2 to 15 seconds with a brake of 15 minutes between the single impulses.
  • According to state-of-the-art manufacture the test cabinets are of a modular design and are ready to be installed.
  • The whole system is designed to be used under extreme conditions and guarantees reliable functioning and a long service life.
  • Independent of design and condition of the test specimen a constant dust density is reached due to special high-capacity compressed air nozzles, which leads to reliable test results.

Special Advantages at a Glance

  • Easy operation
  • Modular design and ready to be installed
  • Switch cabinet in protection type IP 54
  • Easily-accessible system components guarantee shortest service and maintenance time
  • Low requirement of energy
  • Feet individually adjustable in height
  • Exterior finish
  • Amply dimensioned, user friendly loading door with special sealing
  • The unit mainly consists of the cubic test chamber with dust funnel fitted below the base.
  • The housing of the test chamber is made of sandwich panels. An acrylic glass door, equipped with a window wiper is fitted to the front of the test chamber. Optimum seal of the test chamber is ensured by special circumferential rubber seals. A shelf made of galvanized steel is located above the funnel on which the specimens are placed.
  • A replaceable exhaust air filter is mounted in the machine compartment of the test chamber.
  • Dust formation inside the test chamber is achieved by blowing in compressed air through special nozzles. The fine cement dust is blown into the upper test space by intensive air movement. The depositing fine dust particles are collected in the funnel and returned to the dust chamber. The dust is kept dry by a heating device fixed to the floor. The compressed air in the test chamber is passed to the outside through the replaceable exhaust air filter. A built-in pressure reducer with oil and water separator serves for fine adjustment of pressure in front of the nozzle. The solenoid valve installed in the compressed air supply pipe is actuated by the control system, i.e. it opens or closes according to the pre-set times of the test cycle.
  • The electrical section is installed in the switch cabinet fitted to the test chamber side wall. This switch cabinet will be connected to the power supply by means of a plug.
  • The switch cabinet is wired in accordance with the VDE regulations.

Control System

  • S!MPAC* is a self-monitoring, digital 32 bit measuring and control system and has been designed especially for the use in test chambers. Thanks to its computing efficiency S!MPAC* meets the requirements of process technology and facilitates the input due to the touch panel that has been especially developed by Weiss Technik.
  • The system is operated by means of the integrated color touch display. The display provides information on the current test time. Its function keys are available for direct switching on and off of testing. It has an alarm display and an acoustic alarm. The diagnosis system is activated on the touch screen display at the touch of a button.
  • Control is governed by the 32-bit I/0 system S!MPAC* with integrated soft PLC. A web server can place test and diagnosis and maintenance information on the intranet via Ethernet if desired.
  • However, since the USB interface is routed to the outside it still presents a certain danger potential, so that, theoretically, the computer system can be jeopardized by the installation and activation of malicious programs.
  • In order to avoid this risk potential we recommend the deactivation of the USB interface.
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