i
Organization of this manual
This manual describes the features, operation and other aspects of the Tri-axial
Groundborne Vibration Meter VM-56. If the unit is used together with other equip-
ment to con gure a measurement system, consult the documentation of all other
components as well. Pages iii and following contain important information about
safety. Be sure to read and observe these in full.
This manual contains the following sections.
Outline
Gives basic information on the con guration and features of the unit, and
contains a block diagram.
Controls and features
Brie y identi es and explains all parts of the unit.
Preparations
Describes power supply and pre-use checks, installation, connections, key
settings, and other steps.
Reading the Display
Explains symbols and other information shown on the display of the unit.
Measurement
Describes the steps for measurement.
Comparator
Explain the operation of the comparator.
Store operation
Explains how to store measurement data.
Card capacity and store time
Lists the data store time corresponding to the SD memory card capacity, etc.