Using Sensors; Sensor Attachment; Sensor Placement - HP 5528A User Manual

Model 5528A
Distance Measurements
3.
Release the switch handle; this will allow it to lock
OIl
Ihe new selling.
When you are entering data via the Measurement Display unit 's keyboard, remember to enter
values appropriate for the measurement units you have selected; also, you can ', mik "English" and
"Met ric" units (inches and degrees Celsius, for ekample).
If
you change the selling of the rear-panel ENGLISH/ METR IC switch, all previously-entered values
will automatically
be
converted to equivalent values in the newly-selected system.
To provide your laser Measurement System with information it needs to know about the
environmental and material conditions at the time of measurement, use the appropriate procedure
below, depending on whether or not you have one or more sensors connected to the
Measurement Display unit .
Using Sensors
Sensor Attachment
The Air Sensor and Material Sensor(s) should already
be
att3chcd. See Section 5 for in structions.
CA UTION
To prevent possible d amage to the Measure me nt Display unit,
be sure you turn
the
line power
o f( before conneelins or
discon-
necting any Cillblc at U
s
,en
panel.
NOTE
Be sure to " lock" the connections, so they won 't accidentally
come u r,donc.
Sensor Placement
In order to accurately correct for the effects of environmental and machine temper,lture on the
laser reading, you must locate the sensors where they can accurately monitor the conditions
influencing the laser. The 10751 Air Sensor (which monitors the atmospheric conditions) should
always be mounted as closely as possible to the actual M(ASUREMENT PATH , so it can monitor the
conditions the laser beam is experiencing. When monitoring material temperature to account for
material ekpansion, the 10757 Material Temperature Sensor should be placed on the part of the
machine closest to its displacement measurement system.
As an example for sensor placement , let 's consider making a measurement on a mill, shown in
Figure 6-11 . In this case, il is easy to determine where the sensors should be. The 10751 Air Sensor
shou ld be placed nCkt to the beam in the measurement path. The 10757 Material Temperature
Sensor should be placed as cl ose as possible to the
ma c hine'~
displacement measurement syslern.
For Ihis rnachine, it is the table top.
N OTE
The Air Sensor should be mounted with its arrow pointing up, to
maximize accuracy, as shown in
Figure
6-12.
It
should also be
located in an area with good air flow.