ATEIS IDA8 - Manual (Page 132)

ATEIS - IDA8 132
© 2012 ATEÏS
Leakage occurrence:
If the leakage impedance is lower than the leakage threshold which is defined in [Global Settings]
tab, then a Leakage Occurrence fault is recognized.
If the internal values of monitoring Line A/B become abnormal, the IDA8C/S will detect and
recognize that error, then generate a global fault Line A/B Error. The error status is showed in the
field [Measure(ohm)]. There are three kinds of Line A/B Errors listed below:
Line A/B Open:
If the value of Measure (ohm) is greater than 4000 ohm, this fault can be recognized by the
IDA8C/S. The field of [Measure(ohm)] shows "OPEN".
Line A/B Bad Impedance:
If the value of Measure (ohm) is greater than Reference A&B (ohm) + Tolerance (%), or value of
Measure (ohm) is less than Reference A&B (ohm) - Tolerance (%), this fault can be recognized
by the IDA8C/S. The field of [Diff(%)] shows the percentage of difference. In the figure above, the
difference in percentage of zone 4 is 78.24 which is greater than the tolerance of 15%. A Line A/
B bad impedance is then recognized.
Line A/B Short:
The voltage of pin +, - is monitored by the IDA8C/S, if the voltage is zero. This means there is a
short circuit outside the IDA8C/S. If this fault is detected, the internal relay of a zone will be
open to stop the audio signals to the speaker. The user needs to perform a Reset Monitoring as
described in the preview part of this topic in order to switch the status back. For example, make
the audio output to the speaker and enable the monitoring of the short again. A string "S.C." is
showed in the field [Measure(ohm)].