7.3 Calibrating the accelerometer
ENSURE the laser is switched off throughout this
procedure.
The ArraySight sender units are calibrated in the factory using
precision calibration jigs. If this process is attempted without a level
surface and a true 90° angle, then calibration information could
be incorrect. Only attempt this process if you have the appropriate
facilities to ensure accuracy.
Calibration is performed using gravity as a reference.
Note: If you are interrupted during any of the following steps,
or the display shows anything other than indicated, you will
need to start the procedure again. Errors can occur if the unit
'times out' or if a button is inadvertently pressed twice.
The calibration procedure can be canceled at any time by
pressing the left-hand «CANCEL» button.
1. Place the sender on a known level surface with a block or side
fence positioned at exactly 90°, so the unit can be registered
accurately both vertically and horizontally.
2. Connect the sender unit to the meter unit and power it up.
3. Select "«MENU»
Þ
«Sender settings»
Þ
«Calibrate»".
You’ll then need to follow a six step procedure:
1. First, the meter screen will prompt you to place the sender in
the
z+ position.
z+ is the sender unit’s "normal" orientation, sat flat on the
table top.
Select «START»…
2. When «z+ acknowledged » is displayed, place the unit in the
z– position, i.e. upside down on the table top, so the base of
the unit is facing upwards.
Select «NEXT»…
3. When «z– acknowledged» is displayed, you are next
prompted to place the unit in the
x+ position.
In the
x+ position, the unit points upwards, with the laser
aperture at the top. This requires holding the unit with the base
against a vertical surface.
Select «NEXT»…
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