25
FINAL TESTS
At this point, the system should have all
settings programmed and it should be
monitoring in the Auto sample mode. There
are four stages to the final checks: Correct
Monitor Sequencing, Correct Integration
with
External
devices,
Response
to
Refrigerant and End-to-End System Test
Monitor Sequencing
Watch the unit as it measures the sample
area. Make certain that it periodically
switches from the Auto sample mode to the
Auto zero mode, and back again. Make a
note of the ppm reading in the sample area.
The reading should be zero. It may
periodically measure a transient level of
between 0 and 10 ppm, but it should never
stay above 10 ppm if no leak is present. If
the reading is consistently higher than 10
ppm, or if it enters alarm, it is likely there is
a leak present. A high reading may also
result from the recent use of a chlorinated
cleaning agent. Many industrial degreasers
use chlorine based organic compounds.
Examples
are
trichloroethylene,
or
perchloroethylene. If there is no leak and
there are no other sources of halogen
vapors in the room, contact SenTech
technical support.
Integration with External Devices
Once a monitor has been connected to
external alarms, fans and building systems,
integration can be checked using the Alarm
test function of the monitor. The Alarm test
screen is found in the System Setup menus
described previously in the start up and
programming section of this manual.
The setup menu is accessed by pressing
the “ENT” key. Press the “4” key to enter
setup, followed by the password “999”.
From the setup menu, press the “3” key to
enter system setup. From the System
setup menu, press the “3” key to enter the
alarm test screen.
Key selections 1, 2, and 3 are used to
energize the Low, Main and High alarm
relays respectively. Key selection 4 will
initiate a cycle that turns on the low relay,
then the main relay, then the high relay,
until all three relays are energized. If any
relay has been energized, the fourth line of
the display will change to instruct the user
to press the “RESET” key to de-energize
the relays.
With the alarm relays energized, confirm
that the monitor is correctly integrated into
the building systems. Once this test has
been completed, press the “ABORT” key.
The monitor will restore any alarms that
existed prior to entering this test mode, and
will return to the system setup screen.
Press the “ABORT” key again to return to
normal operation.
Alarm Test
1)…Low 2)…Main
3)…HIGH 4)…All
Press Key To Test
Alarm Test
1)…Low 2)…Main
3)…HIGH 4)…All
RESET To Clear
Summary of Contents for IR-SNIF-MC-1
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