Mag-ic Probe V4.0 User Manual

Electronic Thickness Gauge

Disclaimer:

WARNING !! -
This device uses extremely strong NEODYMIUM magnets. These magnets can cause injury or
KEEP AWAY FROM CHILDREN!!.
damage if misused.
other medical condition that may be affected by magnetic fields. The strong magnetic fields can erase computer
hard drives, magnetic access and credit cards, Use at your own RISK.
MAG-ic Tech or its owners neither assumes nor accepts any liability for damages resulting from the handling or
use of this equipment. With your purchase, the buyer agrees that he/she is responsible for all damages and
injuries caused by the use of this product , which include personal injuries , property damages and any other
damage whatsoever. The buyer must agree with the terms before using the product.
Pay special attention when using this device to measure finished instruments. The probe tip is fabricated from
Delrin and may scratch or leave marks on finished surfaces.
DO NOT DRAG THE PROBE TIP OVER FINISHED SURFACES!! To avoid scratches and marks, you should
slightly lift the probe before moving it. A good method is to lift the tip and place a piece of soft cloth under before
moving and removing the cloth at the new measuring location.
This device uses magnets and magnetic sensors to measure the thickness of non-ferrous materials. This
technique is very effective because magnetic fields can penetrate these materials with no attenuation or
deformation. However, as with most technologies, some tolerance and knowledge is required for achieving the
best results.
Ÿ Magnetic fields are strong at the magnet surface and deteriorate rapidly in a non-linear manner as distance
increases.
Ÿ Magnetic fields will vary with changing temperatures.
Magnetic and most other sensors are unstable and vary their output with changing temperatures.
Ÿ
Ÿ Friction may cause the inner magnet to not be centered on the probe tip when moving the probe across the
measured object.
Considering the above and following the usage tips will enable you to get the most out of your MAG-ic Probe.
MAG-ic Probe is supplied with 2 magnets. The ½" ball provides the strongest magnetic field and thus the highest
resolution and should always be your first choice. The smaller magnet should only be used when access to the
inside of a finished instrument is limited due to small f-holes etc.
MAG-ic Probe starts with a calibration sequence to detect the magnet size and also to try and compensate for
small variations in field measurement tolerances. This initial calibration is suitable for most quick measuring jobs,
for example where you are making a few measurements, shaping or sanding and then measuring again etc.
Note, MAG-ic Probe can be powered by the USB connection without the power switch turned ON, however
because computer power supplies may have slightly different outputs, MAG-ic Probe was calibrated with the
internal battery connected and power switch in the ON position.

Advanced Calibration.

When preparing for a more serious prolonged measuring session such as mapping a complete top or plate with
many measurements, a two step calibration sequence is advised.
MAG-ic probe is factory calibrated using a precisely machined stepped surface in a temperature controlled
environment. The largest effect that may cause a drift in the measurement value, is from variance in probe
temperature due to heating by the hand of the user.
V4.0

Calibration - a Word about magnetics

DO NOT OPEN or USE if you have a pacemaker or