K-METRON Radio User Instructions (Firmware 3.0.4; Doc v4.0)
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6.2
Measuring an External Radius with K-METRON.
It is straight forward to measure external radii down to 5mm. Place the sensor head on the
surface of the part located at external radius to be measured. Ensure that the sensor head is
perpendicular to the tangent of the radius to make an accurate reading.
6.3
Measuring an Internal Radius with K-METRON.
It is straight forward to measure an external radius down to 5mm. At radii less than this the
main difficulty is with access to the surface. When measuring thickness of internal radii, the
correct measurement often requires compensation for the gap distance as shown below.
6.4
Sensor Head Care
DO NOT ALLOW THE TRANSDUCER MAGNET TO ‘SNAP’ TO THE FACE OF THE SENSOR –
SEVERE DAMAGE MAY OCCUR TO THE DEVICE SENSOR AND MAGNET.
Keep the Sensor Head and magnet away from computer displays or any product which is
sensitive to strong magnetic fields. Permanent damage may occur to such devices.
The Sensor is highly sensitive to magnetic fields and temperature. High temperature
environments may also affect the accuracy of readings.
The instrument has been factory calibrated to accuracies shown in the table below.
Regular checks should be made to ensure the instrument is operating within its capabilities
and it is recommended that the unit is returned to 493K Limited for an annual recalibration
A minimum external radius of 5mm
(3/16”) can be measured using the
supplied 10mm diameter magnetic
sphere.
A minimum external radius of 3.3mm
(0.1229”) can be measured using a 6.6mm
diameter magnetic sphere (contact for
supply).
minimum external
radius
gap
A minimum internal radius of
25mm (1”) can be measured before
it becomes impractical and difficult
to compensate for gap distances.
Radii less than 25mm also tend to
allow the magnetic force to pull
the magnet to the side of the part.
minimum external
radius