Psion Teklogix Vehicle-Mount Computer 8590 - Manual (Page 145)

8580/8590 Vehicle-Mount Computer User Manual 119
Chapter 8: Internal Devices
Automatic Switch-Off And Heating
Pencil Hardness Test ASTM D 3363.74
The resistive 8580/8590 touchscreens have a hardness > 4H.
Test scale (from softest to hardest): 6B, 5B, 4B, 3B, 2B, B, HB, F, H, 2H, 3H, 4H,
5H, 6H, 7H, 8H, 9H
Adhesion
Test scale: 0B=100% delamination, 5B=no delamination
8.6 Automatic Switch-Off And Heating
8580/8590 models with DC voltage can optionally be equipped with either an
automatic shutdown module or an automatic shutdown and heating module.
If the heating option is implemented, the 8580/8590 can be operated at temperatures
ranging from maximum -30 C to +50 C.
Modes Of Operation
If wired up accordingly, the 8580/8590 conveniently switches off together with the
vehicle's ignition. As disconnecting the power supply during operation can lead to
data loss, the operating system needs to be shut down normally using the
appropriate hardware and software installed on the system when the ignition is
switched off.
The 8580/8590 is connected to the vehicle with three supply cables. DC+ and DC-
are directly connected to the power supply of the vehicle, the connection is of course
run through fuses (refer to “DC Power Pack” on page 44). Therefore make sure that
the cables are connected directly to the battery and not to high-interference supply
lines (for example, motor supply) or to supply lines already used by other
consumers.
The supply voltage connected is then linked to the 8580/8590 ignition input via a
switch, for example, the key switch of the ignition (also with a fuse, see “Power
Supply Fuses” on page 115).
Mineral oil none none
40% sodium hydroxide none slight corrosion
111 trichlorethane none none
Turpentine none none
Vm & P Naphtha none none