Addressable Gas Detection System Manual
Addressable System Manual
66
Issue 2, January 2015
Redundant channels with different detector models (
divers redundancy
)
Fig. 4.5.5 i) Redundancy defined for two different detector models
For the same area to be covered, when redundancy is being applied, one may set as
redundant two channels having installed different models of detectors, if these are
both for the same gas and have the same the thresholds settings.
The Fig. 4.5.5 i above shows redundant channels with two different detectors for
Methane.
Modification of redundant channels
If one out of two redundant gas detectors is modified, the same modifications are to be
updated to the other redundant detector.
If the “Gas Type” shall be modified, both redundant detectors have to be modified.
Regarding the “Alarm Settings”, two redundant detectors of one measuring point
shall have identical alarm settings.
After modification of one of the redundant channels, the old and new sets of
parameters for the channel are indicated with the modified values in red like for
single channels. If the modification is confirmed, all modifications of alarm values
which are carried out for one detector will automatically be taken over for the second
one.
