Always clean the surface before installing a membrane switch. If alignment is difficult, we recommend that you remove a small corner of the backing, align the membrane switch, stick the corner down, bend back the membrane switch and remove the rest of the liner. NEVER bend a membrane switch in an LED or dome area. After the membrane switch is correctly located, rub it down with firm pressure. The adhesives we use are called pressure sensitive adhesives because they need pressure to insure a strong bond. The adhesive will continue to cure for many days. It will have reached 90 percent of its ultimate bond within 72 hours under most conditions. No testing of the adhesive should be done within 72 hours of installation.
Subpanels
In some applications it is desirable to have Holland Nameplate supply the membrane switch mounted to a rigid subpanel. The most commonly used material for such subpanels is aluminum. These subpanels can be supplied with a variety of hardware installed.
It is important to keep in mind that the subpanel must have different mechanical dimensions to allow for assembly tolerances. The subpanel should be .020" smaller than the membrane switch in both height and width. All cutouts and holes should be
.030" larger. Cutouts behind windows should be .060" larger than the window. These general guidelines are intended to help insure that the subpanel is not visible after assembly.
Backlighting
We offer several backlighting solutions for viewing legends in no light and low light applications. The most common backlighting methods used are fiber optics, electroluminescent panels, and LEDs. Fiber optics and electroluminescent panels offer the advantage of uniform light over a large area.
Drawings and Specifications
Our ability to manufacture a switch which meets our customer’s expectations is dependent on how well we understand our customer’s requirements. The customer should be sure to supply us with as much detail about his design requirements as possible. Appendix “B” is a checklist of issues that should be addressed in communicating a customer’s complete requirements. It is helpful for the customer to supply a copy of this checklist with notes on topics not covered elsewhere in this documentation. Additionally, there Is no substitute for a detailed engineering drawing
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