Series PC Manual V 1.0 - Rev. 3
– 03/01/01
DS Europe
9
IMPORTANT:
Cursors, magnets or float, not produced by DS Europe and chosen by the Customer must
be sent to DS Europe in order to be checked. DS Europe, if possible, will custom calibrate
the transducer with them.
Customer must tell to DS Europe the application conditions: used materials , pole position,
distance between magnets and probes etc..
For further supplies it is advisable to always have DS Europe keep a sample.
5. MAGNETIC CURSORS SUPPLIED BY DS EUROPE
5.1.
WITH RADIAL MAGNETIC FIELD
These are ring models: ARR-1E; ARR-2E; ARR-3E.
They consist of rare earth cylindrical magnets, radial to the probe and contained inside
polyamide plastic or aluminium rings.
Polarities are shown in Fig. 5.
The ring works correctly regardless of which side of the ring is pointed towards the
measuring head.
The cursor can be fixed with glue or non-magnetic screws (AISI 300 series stainless steel,
brass, etc..)
Take care to apply instructions given in figure Fig. 1 – 2. The space “C” in Fig. 2 can be
filled with a non-magnetic material. (e.g. aluminium).
5.2.
WITH AXIAL MAGNETIC FIELD
Ring toroids (Fig. 3): They are from ARA-5F models to ARA-10E models.
Toroid Cursors with opposing poles on the two base planes.
Important
: in order to work correctly it is necessary that the polarity towards the measuring
heads corresponds to the one indicated in Figure 3.
The material (ferrite (= F) or rare earth (=E) ) is hard and delicate. It cannot be drilled and
must be fixed with glue, preferably inside the relative housing or with an adapter made by
the User.
5.3.
FREE FLOATING CURSOR
Mod. AFR-1E –(
Figure 4A
):
It contains two parallel magnets arranged in radial fashion on a plate made of non-
magnetic material, supplied with central fixing holes.
The distance from the AFR-1E cursor and the measuring probe must be 5mm with a
±1mm tolerance.
After having clamped the cursor within the above mentioned tolerancy, when moving along
the probe, It must nonetheless mantain a
±
0,2 mm maximum fluctuation from the probe.
These distances must be constant along all the measuring stroke onto the mod. PCR
transducers.
Whenever the distance is bigger than 6mm , there is not enough magnetic field magnitude
to recognise the magnetic cursor position.
