Psion Teklogix Vehicle-Mount Computer 8590 User Manual

A

PPENDIX

M

ECHANICAL

 D

YNAMIC

 L

OADING

D.1  Introduction

The mechanical environmental conditions of the 8580/8590 can vary greatly in 
terms of vibrations, collisions and shocks. The matter is made more difficult by the 
fact that the random values for acceleration and their frequencies for a given 
location are often unknown.
It is therefore useful to divide the values into three operation classes 5M3, 5M2 and 
5M1 on the basis of standards, previous measurements and experience. The 
following standards offer a practical means of reference:

•

DIN EN 60721-3-5: 1998 classification of environmental conditions, part 3, 
section 5: Use on and in ground vehicles.

•

Military standard MIL-STD 810F: 2000.

(5)M3 Mobile Use

Operational environments with high energy vibrations and high energy shocks as 
well as rough handling/transport compliant with:

•

Operation class 5M3 according to DIN EN 60721-3-5 or equivalent.

•

Category US Highway Truck according to MIL-STD 810F.

•

Examples: Vehicles without shock absorption: Fork lifts, unbalanced 
machines: Combustion engine of a construction machine. 

(5)M2 Restricted Mobile Application

Operational environments with low energy vibrations and high energy shocks as 
well as careful handling/transport compliant with: 

•

Operation class 5M2 according to DIN EN 60721-3-5 or equivalent.

•

Category US Highway Truck according to MIL-STD 810F.

•

Examples: Vehicles with shock absorption: Driver's cab in a tractor, stand-
ing machines: Machine tools.