24
End-to-End System Test
After
manually
verifying
the
operation of the monitor, and
obtaining (creating) a sample known
to have a PPM level higher than the
highest alarm, the next step is to
perform an end-to-end test of the
system. This test will verify that the
monitor will correctly trigger alarms
and the external devices connected.
This will be done by connecting the
sample of refrigerant from the
previous test to the sample inlet and
observing the alarms. This test is
best done after the monitor has run
through at least two complete auto
sample and auto zero cycles.
After approximately 5 seconds, the
PPM reading should start to rise.
When the monitor exceeds the alarm
threshold, it will switch to "Leak Wait"
mode. This mode ensures the
presence of a leak before triggering
an alarm. The leak wait period can
be as short as 7 seconds and as
long as 3 minutes.
Note: The more
the reading exceeds the alarm trip
point, the shorter the time to enter
alarm.
The system should progress
from Low alarm, through Main alarm
and into High alarm.
Note: If the
monitor exceeds high alarm while
in leak wait, it will appear to
trigger Main alarm and High alarm
at the same time. This is normal,
correct operation.
When a relay is programmed for an
audible alarm and energizes, the
external horn should sound (if so
equipped) and the bottom line of the
display should change to "RESET to
Silence". This instructs the operator
to push the "RESET" key to silence
the Horn.
If the Horn has been silenced, the
fourth line of the display should
change to "RESET to Clr Alarms".
This instructs the operator to clear
the alarms.
Remove the gas sample from the
inlet and wait until the PPM reading
drops back to normal. Push the
"RESET" button. The System should
clear the alarms and be back in
normal Automatic operation.
Reconnect the sample inlet tube and
dispose of the gas sample in an
appropriate manner.
Documentation
Fill out the CTS/Warranty form
completely and return it to SenTech
in the envelope provided. This is an
important step to establish warranty.
Please use this opportunity to make
any suggestions for improvements.
If you are part of the user
organization, store this manual in a
safe place. If you are an installing
contractor, please turn over the
manual to the user.
If you need any additional manuals,
call SenTech and we will be pleased
to provide them at no charge (make
a note of the unit serial number when
requesting a manual). Installation
and Operation Manuals for every
Monitor ever produced by SenTech
Corporation are available at the
SenTech website:
www.sentechcorp.com
Summary of Contents for IR-SNIF-1
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