09-2018
file: ISAFE3-OperationManual_EN_DE.R4.VEXH.docx
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Vallen ISAFE3 Operation Manual - Operation Manual
8
Accessories for ISAS3
8.1
Magnetic Holder MAG4IS
Figure 8-1 shows a magnetic holder MAG4IS. It consists of a mounting plate of stainless steel,
which is pressed by three springs towards the test object. Three magnets have direct contact to
the surface of the test object.
Figure 8-2 shows the ISAS3 with the MAG4IS completely mounted. An earth connection must
be made using one wire of at least 4 mm
2
copper (or two of at least 1.5 mm
2
) fastened at the
designated sensor thread M4 (see Figure 8-2, right) to an earth point nearby (EN 60079-
14:2008, 12.2.4). Washers must be used and sufficient torque to ensure the earth connection is
not twistable.
Figure 8-2 ISAS3 on magnetic holder MAG4IS (right: earth connection)
Figure 8-1 Magnetic holder MAG4IS
Three threads M4 (labeled A in Figure 8-1) are to
fasten the base plate of sensor ISAS3. Two
threads M4 (labeled C in Figure 8-1) are to mount
e.g. a steel tape around a cylindrical tank for
stronger fastening against vibration and
acceleration when driving over bad roads.
Magnets are of material cobalt samarium. Each
magnet provides a holding force of 200 N.
Magnets are suitable for the full temperature
range of ISAS3.
Each spring provides a holding force of 25 N.
Springs are made of stainless steel.
MAG4IS is suited for all ISAS3 variants
C
A
A
3 spring-
loaded
magnets
C
C
A
2 threads M4 for
earth wires
