SENSITRON
A Halma Company
MT2276E
GALILEO 32
Manual (EN)
P. 14/14
Pressing Enter key, with a certain fault event selected, a window is opening
showing the details of the related channel as in the next image:
Figure 3.5
b) FAULT details screen
3.6
TEST/MAINTENANCE
This state is meant for testing and maintenance purpose. The related function
may be tested following an operations sequence, especially designed for this
purpose. The test/maintenance condition may be activated for each one of the
individual channels.
An user with the OPERATOR or MAINTENANCE level cannot put under TEST/
MAINTENANCE more than 50% of the system’s channels and outputs.
The signals from channels under TEST will be displayed but will not be consid-
ered, in the way that no alarm will be triggered even though the alarm thresholds
are being exceeded.
In the same way, the relays under TEST, will not be activated, even if an alarm
event associated is taking place while the relay is in TEST/MAINTENANCE mode.
EXCEPTION: In the case just one channel is defined, it will be possible to put that
only the channel under test.
The same applies to the case when just one relay is defined. That one relay can
be put under test.
3.7
UNSET
The state is useful for virtually taking off the system various parts, without physi-
cally interrupting the connection.
The UNSET condition may be activated for each one of the individual input chan-
nels and for each one of the 8 relay output.
In the same way as for TEST/MAINTENANCE mode, an user with the OPERATOR
or MAINTENANCE level cannot UNSET more than 50% of the system’s channels
and relays.
The only exception is the ENGINEER level, which may UNSET the whole system
if necessary. It is required to do so for maintenance operations in the installation
where the gas detection systems is installed.
