DeFelsko PosiTector SPG Guía Rápida página 4

between the shim's "legs". The average of several measurements
should be within the combined tolerances of both the Gage and
the shim.
If not, see Returning for Service (pg. 9). Metric example:
gage tolerance is ±5
shim tolerance is ±5 µm. So the average of several measurements
should be between 66 and 86 microns. Inch example: gage tolerance
is ±5 or ±0.2 mils whichever is greater. The 3 mil shim tolerance
%
is ±0.2 mils. So the average of several measurements should be
between 2.6 and 3.4 mils.
Zero
The PosiTector SPG has only one adjustment point at zero.
The zero point can be set using one of two methods.
Both methods are found under the Zero menu option.
Glass Plate Zero
Setting the Gage to Zero on the glass plate is the preferred
Zero adjustment method:
1. Select
2. Press the ( + ) button to select the number of readings
to be used to obtain an average, typically 3.
3. Repeatedly measure the glass plate. After the last
measurement, the Gage will calculate a Zero which
represents the average of all the Zero readings taken.
Factory Zero
If a glass plate or suitable smooth, hard surface is not available,
the factory zero setting can be restored:
1. Select
2. Press the down button to select Reset (pg. 4) and press the
center navigation button
will appear on the LCD.
NOTE:
The factory zero setting may not always be precise,
particularly after a probe tip exchange. For best accuracy, the
G age should be zeroed on the included glass plate.
or ±5 µm whichever is greater. The 76 µm
%
Zero Menu
from the menu.
Zero
from the menu.
Zero
. The factory calibration icon
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