DeFelsko PosiTector SPG Mode D'emploi page 4

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Next, place the metal shim over the glass plate and measure
ensuring the probe needle touches the glass plate in the area
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% or ±5 µm whichever is
greater. The 76 µm 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.
Zero Menu
from the menu.
Zero
from the menu.
Zero
. The factory calibration icon
3
0

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