Instruction/ maintenance manual of the product Membrane Holland
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Membrane Switch Design Guide.
2 Introduction Membrane switch technology has become a reliable front panel solution where environmental concerns or frequent cleaning are an issue. The sealed nature of the technology coupled with its reliability and ability to offer tremendous aesthetic fle xibility make it the solution of choice for many industries.
3 specify type styles, colors, and sizes of all copy. Artwork should be provided to us fo r all logos or special symbols. We use the latest version of Autocad with Autoscript to generate our drawings and artwork. It is helpful for customers to supply us with an Autocad DWG file, or as an alternate, a DXF or IGES file.
4 Ultraviolet Hardcoats The most durable hardcoats are those that are cured by exposure to ultraviolet light. These coatings are called UV hard-coats. Hardcoats can be selectively added to many of the materials to produce parts with a velvet textured background, and gloss or anti-glare windows.
5 switch. Standard tolerances should be +/- .015". Tolerances of +/- .010 " can be held on critical dimensions such as the perimeter or cutouts. Hole center to hole center tolerances of +/- .005" can be held. Tolerances on very large parts will be greater.
6 considered when specifying shielding requirements. Tail Exit Point Flexible membrane switches are connected by means of a flexible tail that is cut from the circuit material. We have a great deal of flexibility in selecting the exit point. The tail cannot exit under or within .
7 Creasing of Flex Circuits In many applications the tail of a membrane switch needs to be bent at or near the exit point. Extreme caution should be exer cised when bending flex circuits.
8 sense to consider polyester domes if the total dome usa ge per order is expected to exceed 2500. A drawback of polyester domes is that they tend to relax and lose their tactile feel at elevated temperatures and are not recommended for applications that will experience temperatures above 55 ˚ C (131 ˚ F).
9 -45 ˚ C to + 75 ˚ C (See notes on polyester domes) Life Cycle Testing Holland Nameplate performs life cycle testing to insure tha t our customers have a realistic expectation as to the typical number of cycles a particular design ca n endure.
10 that will have insertable legends. An oversized pocket is put behind this clear area so that the legend card can be inserted and seen through the window. The entire overlay has the same texture, which helps hide the fact that legends are being viewed through a window.
11 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 rem ove the rest of the liner.
12 of the membrane switch. A sample of a simple drawing of a membrane switch is included in Appendix “C”. Appendix “D” is a glossary. Holland Nameplate Overlay Material Guide Appendix A Product ID Manufacturer Base Film Hardcoat Fini sh Embossable UL Rating Texturable Thickness Melinex 561 ICI Polyester No Gloss Yes No Rating Yes .
13 Holland Nameplate Membrane Switch Checklist Appendix B The following items need to be comm unicated to Holland Nameplate before an order can be processed.
14 ___ Customer Specified Shielding ___ None required ___ Printed silver grid ___ Printed carbon ___ Aluminum foil ___ Other ___________ _____ Overlay Material ___ Velvet textured polycarbonate (8B3 5.
15 Embossing ___ Key rims ___ Plateau ___ LED windows Hydroforming ___ Key rims ___ Plateau ___ LED windows Insertable legends ___ Not required ___ Specified Support panel ___ LED windows ___ Not requ.
16 Color matching ___ Custom (samples supplied) ___ Pantone Matching S ystem ___ Federal Standar d No. 595a ___ Copy size, style, and location specified Switch Sealing Requirements ___ Standard splash.
17 Membrane Sample Appendix C.
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22 Glossary Appendix D Actuation Forc e- The maximum force measured pr ior to or including the point at which keypad contact closure is achieved. Alodine- A chemical conversion process that oxidizes alum inum to form a non-porous aluminum oxide. Referred to as “poor-man’s anodizing” because it is less costly and not as durable as anodizing.
23 Over lay- Top layer of a membran e switch (the graphic interface between devic e and user) generally made of polyester or polyc arbonate. Pad Emboss- A raised area on an overlay, which defines an entire graphic. (i.e., a full keypad of L.E.D. wind ow.
An important point after buying a device Holland Membrane (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Holland Membrane yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Holland Membrane - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Holland Membrane you will learn all the available features of the product, as well as information on its operation. The information that you get Holland Membrane will certainly help you make a decision on the purchase.
If you already are a holder of Holland Membrane, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Holland Membrane.
However, one of the most important roles played by the user manual is to help in solving problems with Holland Membrane. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Holland Membrane along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
