DMTA-10026-01EN, Rev. D, January 2015
Chapter 4
78
Figure 4-5 The MEASUREMENT SETUP screen
4.7.2 Calibrating
The calibration matches each target ball being used to an internal lookup table from
the instrument’s memory. The calibration also measures the two extremes of the ball’s
possible locations (BALL OFF and BALL ON) and assigns these endpoints to the
lookup table. If no table exists for the ball, then the unit automatically creates a default
table from which subsequent measurements are displayed. The table is preserved in
the instrument’s memory, even if powered off, until overwritten by a new calibration
or deliberately erased by a MEASUREMENT RESET or a MASTER RESET.
To calibrate
1. BALL OFF: With the probe sitting in the probe stand, press [CAL]. The gage
display instructions will read BALL OFF.
2. Remove any target ball close to the probe tip, and then press [CAL]. The display
will read “Processing... Please Wait” while the gage measures the field strength
at the probe tip. The gage display instructions will read BALL ON.
3. BALL ON: Select the target ball that you will be using in subsequent
measurements, along with the BALL ON FIXTURE for that ball size. The fixture
centers the target ball on the probe tip. Place the ball on top of the fixture. Place
the fixture over the tip of the probe and slide it down until it stops, as shown in
Figure 4-6 on page 79.
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