3. To reset all locations to use the Universal Calibration, perform the
procedure in step 1.
How to Assign Universal Calibration Locations
A number, N, of memory locations can be can be assigned to use the Universal
Calibration. The maximum value of N for the Magnetic application is 50 and for
the Eddy Current application is 49, which corresponds to the total memory
locations for each of these application types.
1. Press the key sequence “٭” “9” ENTER. The letters “uc” will appear in the
upper left corner of the display, and the number of locations previously
assigned will appear on the display. The default value is one.
2. Using the numerical keys, enter the number of memory locations that are
to use the universal calibration and press ENTER.
How to Make Calibrations
Four types of calibrations can be performed.
1. A two point calibration must be performed once on a gage. All gages
come with a two point factory calibration. This calibration should be
performed again if a new probe is to be used.
2. Once the two point calibration has been made, the one point calibration
can be used to quickly reset the gage.
3. After a two point calibration has been made, the base calibration can be
used to re-zero the gage and allow the use of the same calibration on
samples with a different base material.
4. The surface roughness calibration is used with parts that have varying
coating thickness, an uneven surface, and/or variations in the base alloy.
One Point Calibration
For this calibration, use the shim whose value is closest to the actual coating
thickness to be measured, or according to the expected measurement range.
See table below. For ranges greater than 10 mils (254um), consult Oxford
Instruments Technical support for shim size information.
1. Select the memory location for the re-calibration as described in Memory
Management: How to Select a Memory Location.
2. To re-zero the unit:
a. Press the CAL key.
b. Place the probe on the bare part.
c. Press the ZERO/UNITS key.
d. Lift the probe off the bare part and wait for the beep.
3. To reset the thickness:
a. Re-zero the unit as stated in step 2.
b. Place the desired shim over the bare part.
c. Press the CAL key.
Oxford Instruments Contact Measurement Page 7 of 24
233 USER GUIDE
The information in this document is private and confidential and must not be copied.
Oxford Instruments plc
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