The
HVManager can work with the two types of measured vibration data
listed below. Separate routines are used for each of these data
types.
•
Hand/Arm Data
•
Whole Body Data
The
records can be shown on a user selected graphics display of RMS
and Peak values and as a table of averaged values for the number
of measurements required for both Hand/Arm and Whole Body.
When
the database is opened, be it a previously existing one or one
that was just created, the Graphics Display will look as shown
in the following figure for a Hand/Arm or Whole Body measurements showing RMS
values of X; Y; Z; and Sum RMS (X/Y/Z)
and Peak values of X; Y; Z;
and Sum Peak (X/Y/Z):
When
the averaged values are displayed the tabular screen will look
as shown in the following figure:
Averaging: By averaging multiple records, it is possible to
obtain typical vibration values. For example, by having multiple
operators perform the same operation and averaging the records
for each, a more typical set of data can be obtained to
represent that tool for that specific operation.
In
the United Kingdom, on the other hand, the legislation specifies
that the database should provide an averaged record for both
high and low usage.
Note: that when selecting to view more records, the “Include”
check box to the right of each record is automatically checked.
Individual records can be unchecked by left clicking on the
already checked check box, which will remove their data from the
averaging process.
The
Aeq Average (X, Y and Z) values displayed in "Four Record
Display" on the above page now represent the average values for
the four records and the Database data at the bottom corresponds
to the four records. Also, since there are multiple records, a
Standard deviation value for the Aeq values is displayed. There
must be at least four records in the average in order for the
standard deviation to be displayed.
Units: There are six different units which can be used to
represent the Database data displayed at the bottom of the
display. To make a unit selection, left click on the down arrow
to the right of the Units field, which will open a drop down
menu listing the possible selections as shown in the following
figure:
| Daily Exposure
Assessment Tables (Vector Sum Acceleration) |
|
|
|
The results table below shows one Tool or
Process, however tables can support the results of more
than single tools or processes:
|
|
|