Electronic magnetic pole tester0 pages

www.thyssenkrupp-magnettechnik.com
ThyssenKrupp Magnettechnik
Electronic Magnetic Pole Tester
Type: 181004
Functional description
This new, handy magnetic pole tester provides an instant zero-delay magnetic pole indication. Just
press the pushbutton to activate the built-in electronic circuitry that will indicate the appropriate magnetic
pole via LEDs at once. The green LED marks the south pole, the red one indicates north. The probe is
fitted in the tip of this pen-style pole tester. A black mark identifies the center and the location of the
sensor. Due to the small distance between the probe and the specimen, reliable indications are obtained
even with closely spaced pole centers. As the tester is passed over the magnet, an LED light change
from green to red indicates the south-to-north pole transition. A magnet's neutral zone can likewise be
precisely identified in this manner. It is assumed in all of the foregoing that the pole tester is held in a
vertical position relative to the magnet.
With mechanical pole testers it is not uncommon for the polarity of the sensor magnet to be reversed
by the action of the pulse fields. As a result, the device will indicate the very opposite of the actual magnetic polarity. This may have severe consequences when mounting magnet-based equipment. Another
drawback of mechanical pole testers is that the rotary magnet must be mounted in a sensitive bearing
assembly allowing it to turn without effort. This arrangement necessarily involves a certain amount of
inertia that will delay the indication, while also requiring protection of the sensitive magnet. The result
will be an air gap between the sensor magnet and the magnetic pole to be identified. The device will
cease to operate reliably with small distances between pole centers, or with small-sized magnets.
The electronic magnetic pole tester does not exhibit these disadvantages. It is of rugged design, with
no moving parts, ensuring zero-inertia response, and is also readable in the dark and where access is
difficult. Even with very strong magnetic fields, there will be no magnetic reversal or demagnetization of
the probe.
Applications
Measurement of stray magnetic fields in packaging
Coil testing
Post-magnetization polarity checks
Assistance with the following:
Electric motor assembly
Installation of magnetic clamping blocks
Error analysis
Multipole quality control
Technical Data
Johanniskirchstraße 71
45329 Essen, Germany
Tel. +49 (0)201 946161-0
Fax +49 (0)201 946161-555
Dimensions:
Weight:
Display:
Sensitivity:
Operating temperature range:
Storage temperature:
Battery:
Supplied accessories:
approx. 143mm * 22mm * 19mm
approx. 31g including battery
two-LED display (green = south, red = north)
±15 mT on/off hysteresis
0 °C to 50 °C
- 20 °C to +70 °C
4* 1.5V button cell (x 4)
Operating instructions, battery