ATEIS IDA8C - Manual (Page 99)

Product Features 99
© 2012 ATEÏS
Leakage occurrence:
If leakage impedance 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 not normal, 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 Error listed below:
Line A/B Open
If the value of Measure (ohm) is greater than 4000 ohm, this fault can be recognized by IDA8C/
S, In 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 IDA8C/S. In the field of [Diff(%)] shows the percentage of difference, in above figure, the
difference percentage of zone 4 is 78.24 which is great than the tolerance 15%, a Line A/B bad
impedance is recognized.
Line A/B Short
The voltage of pin +, - is monitored by IDA8C/S, if the voltage is zero, it means there is a short
of circuit outside IDA8C/S, if this fault is detected, the internal relay of zone will be open to stop
audio signal output to speaker. User need to do a Reset Monitoring described in preview part of
this topic to switch the status back, i.e. make audio output to speaker and enable monitoring of
short again. A string "S.C." is showed in field [Measure(ohm)]