Appendix B Optional Touchscreen

B.1 Specifications

Electrical

 

Operating Voltage:

3.3 to 5 VDC typical

Sheet Resistance:

350 ± 22% W/square

Linearity:

+/- 1.5% full scale linearity error in either

 

direction.

Insulation Resistance:

> 20 ΜΩ @ 25 VDC.

Optical

Total light Transmission: 75% typical (> 74% @ 550 nm test)

Environmental

 

Operating Temperature Range:

-20°C to +50°C, 2 weeks at 50°C/90%

 

RH

Storage Temperature High:

+70°C, 240 hours at ambient humidity

Storage Temperature Low:

-40°C, continuous at ambient humidity

Accelerated Aging:

100 hours continuous exposure at

 

60°C/95% RH

Thermal Shock:

25 cycles (one cycle is 30 min. dwell

 

alternating from -40°C

 

to +85°C with less than 10 min. trans

 

fer time).

Mechanical

 

Activation Method:

Gloved or ungloved finger

 

Delrin or plastic stylus (no metal) with

 

1mm radius full hemispherical tip

Activation Force:

< 25 g average with non-metal stylus

 

< 50 g average with 5/8” diameter sili

 

cone finger

FPM-3220 User’s Manual

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