One of our customers required a portable ISO 2631 filter set for portable use on
board ships. We supplied special filters fitted to CardMaster 21.2 units in a
21.5 DC powered chassis. Each unit contains 3 channels of filtering, for
tri-axial measurements of acceleration, with integration in the filters to give
the velocity and acceleration components required. The rugged construction of
the cards and rack have so far proved suitable for the harsh marine environment
where these systems are used .
