Cable preparation for the B-field sensor
1-1-2004
J.Kuit
NIKHEF, Kruislaan 409, 1098SJ Amsterdam, Netherlands
jaapk@nikhef.nl
It is somewhat tricky to mount the cable –
connector assembly. Most of the properties are
dictated by the hostile environment like radiation
where in the sensor is used. The combination of
cable, sensor and connector is showed in figure 1.
Connector
The cable connector is a 10 pins single in line type.
Manufacturer: Fischer Elektronik; Type: FV10G
Webpage: www.fischerelektronik
Cable
The ribbon cable is a 20 wire kapton cable from the
CERN store; SCEM: 04.21.22.320.7
The cable is sold in rolls of 30 meters.
NOTE: of the 20 wires only 19 are used;
strip the 20th wire.
The connector position on the ribbon cable is
important because the Fischer connector is not
symmetric. On both sides of the cable the
connector should be connected like the drawing in
figure 2.
Figure 2: Wire use of the cable
Connector to cable assembling
In electronic engineering it is customary to force
the connector onto a ribbon cable with a bench
vice.
With this connector the connection will become
somewhat unreliable. It is better to use a slightly
modified special purpose bench press from Fischer
Elektronik; Type: VBK 1 with removable locating
frame; Type: FW W. (fig.6).
Unfortunately, the locator frame from Fischer is
not very good. So we designed and made our own
locator frame (fig. 4, 5, 7) from aluminum.
Figure 1: The 3D B-field sensor with connector and
ribbon cable
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Figure 3: Base plate of the NIKHEF locator frame
(subject of change, see fig. 7)
Fig. 4: Infiller block nr 1 of the NIKHEF locator
frame to locate the connector.
Figure 6: Picture of Fischer connector press
Fig.3
Fig.4
Fig.5
Fig. 5: Infiller block nr 2 of the NIKHEF locator
frame to conduct the cable.
Figure 7: Detail of the modified locator plate
2
Cable test
You should use a cable tester to check if all the
connections are made. A useful ribbon cable tester
can be obtained from Farnell;
Order Code: 154-271, price: ~510€
NOTE: This connector – cable connection has no
strain relief. So be careful with pulling forces
during installation.
Figure 8: Cable tester
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