Technical data of membrane keyboards:
| |
Flat membrane keybords |
Membrane keyboards
with metal domes
or with embossed keys |
| Guaranteed life expectancy(U<30V, I<25mA) |
3 x 107cycles |
5 x 106cycles |
| Path resistance |
<1 Ω/cm |
| Path width |
<1,25 mm |
| Contact key resistance* |
<50, 100, 200,500, 1000Ω |
| Insulation resistance |
>10MΩ |
| Operation voltage |
max 30V |
| Operation current |
max 25mA |
| Ambient humidity |
max 95% |
| Operation temperature |
-40°C- +70°C |
| External dimensions |
max 350 x 700mm |
| Recommended line width |
> 0,2mm |
| Distance between the centre of keys |
>10mm |
>12mm |
| Colour (without restraint) |
RAL, PANTONE |
| Number of fonts |
- 1000 |
| Graphic design |
as requested |
Colours tolerance
Screen printing / Digital printing |
dE < 3 / dE < 6 |
| 3D keys |
as requested |
| Embossed keys |
as requested |
| EL lamp |
130V 400Hz 5000 hours of work |
| LEDs |
specified colours |
| Distance between connectors** |
0,1", 1mm or other |
* depending on keyboard design and customer's requirements
** Connectors are not provided for paths whose raster differs from that given above
Chemical substances that membrane keyboards are resistant to:
| chemical substances |
foodstuff and others |
| acetone |
coffee |
| methyl ethyl ketone |
tea |
| toluene |
mustard |
| dichloromethane |
ketchup |
| isopropyl alcohol |
tomato juice |
| cyclohexanone |
citrus fruit juice |
| ethyl acetate |
grape juice |
| xylene |
vinegar |
| sodium hydroxide [40%] |
milk and milk products |
| hydrochloric acid |
detergents |
| petrol |
blood |
| potassium chloride |
|
| butyl cellosolve |
|
