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13.0 Continuity check of cables
All cables can be examined on defects like e.g. cable breaking with a continuity check. The check is done with
a multimeter. The manner in which the correct continuity is signalized (Signalsound or 0 Ohm) depends on the
construction of multimeter.
Measuring construction
Measuring example:
Continuity check at BUS-cable
Entry plug
Exit plug
NOTE:
• Information on handling of multimeter
can be taken out of appertaining user
manual.
!
Process
• Adjust the multimeter on continuity check or the smallest resistance measuring range (Ohm).
• Release all plug connections of the checked cable.
• Connect the positive cable of measuring instrument with a contact of entry plug and the negative cable with
the corresponding contact of exit plug.
• Check the continuity over the contacts from entry and exit plug.
• Check all contacts and cores of cable in that way for short circuit or cable breaking.
NOTE:
• Entry- and exit plug can be fixed freely.
During measuring they must not be changed.
Trouble
• Continuity over several
contacts/cores?
• Continuity not measu
rable?
Action
> Replace cable.
> Replace cable.
Cause
- Short circuit in cable.
- Cable breaking.
Trouble index for cable
NOTE:
• In a similar way the bulbs, windings of motor or switches can be
checked.
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