Advantech FPM-3159 Series User Manual page 21

A.1 Introduction
The FPM-3159 Series' optional touchscreen uses an ad-
vanced 8-wire resistive technology. It provides more accurate
sensing capacity than other technologies. The touchscreen is
specially designed for tough industrial environments, and has
been approved to FCC Class A and Class B standards.
A.2 Touchscreen Specification
Electrical
• Contact bounce: < 10 ms
• Operating voltage: 5 V (typical)
• Contact current: 20 mA (max.)
• Circuit resistance: Open: > 30 mohms
• Sheet resistance variation: Within one screen: ± 5%
Durability
Test conditions: 4H hardness, 0.04" stylus pen, 350 gram
load
• Point activation:
Single point, position of stylus controlled to ± 0.0005"
Result: > 1 million activations
• Linear activation:
2" diagonal line, position of stylus controlled to ± 0.0005"
Result: > 250,000 cycles
• Chemical resistance: Hard coating is highly resistant to
most
solvents and chemicals
16 FPM-3159 User's Manual
Closed: < 2000 mohms
From screen to screen: ± 20%