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16 Signature detection/termination detection
ARGUS Copper Box
77
16.1 Possible results
Test
Possible results
Characteristic
features
Remark
PPA
PPA detected
PPA inverted detected
PPA with reversed polarity (inverted)
detected.
Multiple PPAs?
Potentially multiple PPAs connected
in parallel detected.
Multiple inv. PPAs?
Potentially multiple PPAs with
reversed polarity (inverted) con-
nected in parallel detected.
2x PPA/Iso fault?
Potentially double PPA antiparallel
detected or isolation fault.
Signature Signature detected
Signature circuit detected.
Signature?
Signature possibly present:
External voltage, isolation resistance
or additional connected devices can
influence detection such that an
unambiguous result is no longer pos-
sible.
Unknown termination
Cp >500 nF
Unknown termination:
Cancellation, as no further detection
is possible, e.g. NTBA connected,
extremely long line.
Other
No termination detected
Loop?
R <8 kΩ
Cancellation, as no further detection
possible.
Isolation fault?
Rp <1 MΩ
Cancellation, as no further detection
possible.