6
4.6
Minimum Capture (Scan Feature)
If this function is set to “ON” from system setting, it is ready to capture minimum reading in the measurement.
LCD will show the current thickness while the probe is coupled with the sample .as soon as you release the probe
from your part, the LCD displays the minimum reading and “MIN” will flash six times. Measuring during the
flashing will send the results into the capture array to get the minimum reading.
4.7 Two Point Calibration
Use two calibration samples with their known thicknesses, which are better or close to the upper and lower limits
of measuring range respectively. Turn on 2-point calibration function from system setting (section 4.6) and turn
off “Min Capture”. press CAL While checking the thickness of the thinner sample, ”Thin” will be seen on the
LCD along with the thickness result. Use and keys to change the reading to the thickness of thinner
sample .Press CA L to finish the first point calibration. Press CAL and to repeat the above steps for the
second(thicker)sample.
5 Methods of Thickness Measurement
5.1.Measuring planar surface
5.1.1.General methods
a)
Single measurement method
This method involves measuring the thickness at a single point.
b)
Double measurement method
This method involves performing two thickness measurements near a single spot using a dual sensor probe rotated
from 0
°
to 90
°
respectively, with respect to the split face (Fig.1).Take the
smaller
of the two indicated values
as the thickness of the material.
Fig 1
c) Multiple point measurements within a circle of
φ
=1.18” (30mm). This method involves performing a number
of measurements within a circle having a maximum diameter of about 1.18” (30mm)(fig.2). Take the minimum
indicated value as the thickness of the material.
Fig.2
