PROBE
The 233 uses the ECP, SMP-1, and SMP-2 probes. It utilizes Eddy Current (with
the ECP) or Magnetic Induction technology (with the SMP-1 and SMP-2) to
perform the coating measurement. For more information on the theory of these
technologies see Appendix B.
UNITS
The measurement units can be changed from mils (1/1000 in) to um
(micrometer) by pressing the ZERO/UNITS key. Both statistics and readings will
be changed to reflect the units selected.
MEASUREMENT
The gage must be calibrated before measurements can be made.
Measurements can be taken in Continuous Mode (with an activation setting, see
How to Take Measurements —Continuous Mode), Regular Mode or Scan Mode.
Pressing the C/M key changes the mode of measurement.
Continuous Mode
When the probe is placed on a sample, instantaneous readings are displayed.
These readings cannot be saved into the statistics unless the Capture feature is
activated. Refer to the section on How to Take Measurements -- Continuous
Mode for directions on activating this feature. When the probe is placed in air
“InF” will show on the display until the probe is placed on a sample.
Regular Mode
When the probe is placed in contact with a sample a single reading is taken,
displayed, and saved into the statistics. When the probe is placed in air, the last
reading taken will remain on the display until another reading is taken.
Scan Mode
The 233 can be configured with optional Scan Mode software. Units with this
feature allow for moving the probe around the surface of a sample to obtain an
average thickness of the coating. This feature is useful when measuring large
parts, samples where the thickness of the coating varies across the surface,
sandblasted parts, and textured surfaces. The probe must be held in contact
with the sample, while being slid across its surface, for the specified scan time.
Readings are continuously being taken at a rate of approximately 2 readings per
second. After the scan time has elapsed, three beeps will sound and the word
“dOnE” will show in the main display. The mean, low, or high value of the
readings can be shown and inserted as one measurement into the statistics. The
scan time can be set from 1 to 60 seconds. The mode of printing or displaying
the statistics can be selected. See How to Take Measurements — Scan Mode.
MEMORY STRUCTURE
Memory locations 1 to 99 are available. Each location stores a calibration,
statistics and readings. Locations 1 to 50 are allocated for Magnetic applications
and locations 51 to 99 for Eddy Current applications. The memory location is
Oxford Instruments Contact Measurement Page 5 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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