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7.1.3
KSR sensor (Toroid) X3
1070 080 056-101 (99.09) GB
PST 6101.321 / PSI 6101.321
For cable type and maximum cable length, please refer to the Table "Cables", see sec-
tion 5.
The KSR sensor (weld current sensor) is inserted in the secondary circuit of the welding
unit. Installation must be made in such a way, where the sensor is protected from me-
chanical damage by the part as well as be shielded against splashing of weld material.
As the actual installation is concerned, remember that improper placement of the KSR
sensor may lead to measuring faults.
In order to keep these faults as small as possible, the following cautions must be ob-
served:
-
The current carrying conductors must be run through the KSR sensor as straight
and as centrally oriented as possible. The sensor should be mounted as far away
from current carrying bus bars and high current carrying conductors in order to pre-
vent noise effects of external fields.
-
No metal parts, which can be magnetized should be used to mount the KSR sen-
sor. Copper and brass are to be preferred.
-
To be able to assess possible measuring fault, calibration measurements (scal-
ings) should be made in each case, using a suitable current module.
-
The maximum cable length between the KSR sensor and the PSI 6101.321 / PST
6101.321 is 100 meters. This limit must not be exceeded.
-
The connection between the KSR sensor and the PSI 6101.321 / PST 6101.321
consists of a shielded cable. The shield must be connected to X3/3 of the PSI
6101.321 / PST 6101.321. The shield at the sensor end is left unconnected.
The KSR cable value (ohmic resistance of KSR sensor, cable and connector) can be
measured by a measuring circuit test during the last half-wave of [SQZ] (Basic Setup -
Sequence Setup in the BOS-5000).
The measuring circuit test is evaluated for the following events:
-
ohmic resistance less than 7 W
-
ohmic resistance between 12 and 950 W
-
ohmic resistance higher than 1100 W
Measuring circuit values in the intermediate ranges lead to an ambiguous evaluation of
the measurement.
In the use of KSR sensors with robots or similar devices, certain cable segments are sub-
ject to severe mechanical stress. This must be kept in mind when selecting the cables
and the design of the cable connection.
Electrical connection
=
Measuring circuit shorted.,
Measuring circuit o.k.,
=
=
Measuring circuit open.
7-5
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