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REMOTE INTELLIGENT SENSOR - AREA MONITOR
Instruction 2772-0803 Page 3-5
IMPORTANT: Please note that this
method is not suitable for, and is not
intended to be used for, checking or
verifying the system’s calibration, but only
for alarm simulation and checks.
Test Preparation. Warn that tests are to be
carried out and that external alarm systems may be
activated. Check that the RIS is powered up and
working. Open the door and disable the door open
switch with a magnet. (A suitable magnet is
available, see Chapter 5). It may be convenient in
some cases to remove the board cover.
Enter TEST Mode (press the Red button on
the main board), open the tape gate and remove the
cassette. Insert the Test Card in the gate with the
zero line on the card lined up with the edge of the
optics block. See Figure 3-4. Close the gate.
NOTE: Due to the reflectance difference
between the cassette tape and the Test
Card, it may be necessary to readjust the
light level of track 1 to 220 with the Test
Card installed in the tape gate. Refer to
Section 4.4 (Adjusting Light Levels) for
instructions. It is not necessary to adjust
track 2 for this test.
Figure 3-4. Installing Test Card
Exit TEST Mode, leaving test card in gate.
Carrying out the Test. Press the Tape Reset
button (the red button on the left of the optics
block). The tape advance cam will turn (but will not
move the test card), and a cycle commences. The
purge cycle will start, listen for the cycle to end
10 seconds after it starts, (the pump sound will
reduce as the pump slows). Start Counting when
the purge cycle stops and the normal sampling cycle
starts. After 20 seconds pull test card to the
right so that the READING mark is lined up with
the right side of the block, Figure 3-5.
Figure 3-5. Pulling Test Card
This puts the dark ‘stained’ section of the card
under the photo cell. The result should be an imme-
diate ‘gas concentration’ of, typically, 40 to 60% of
full range shown on the display (i.e. approximately
400 to 600 ppb for a 1,000 ppb RIS).
NOTE: The actual reading is not important
if it is above alarm set point.
If the 20 seconds is reduced, the concentra-
tion reading will be higher. Conversely if it is
increased the concentration will be lower.
NOTE: Be aware that a fault alarm will,
usually, inhibit a gas alarm; make sure
that there isn’t a fault condition active
when test is started.
The test card check can be repeated by opening
the gate, repositioning the test card, pressing the
tape reset button and starting again.
IMPORTANT: AFTER CHECKS have
been completed, enter the TEST Mode,
remove the test card, and replace the
cassette. Reset the light level of track 1 to
220 if changed. Remove the magnet used to
inhibit the door open alarm and replace the
cover on the main board, (if this was
removed). Put the RIS back into service.
3.14. PRINTER OPERATION & USE
(OPTIONAL FEATURE)
3.14.1 GENERAL. The Printer option requires
fitting of the Printer Option board and connection of
a suitable Printer. See Chapter 5 for part numbers.
Installation of Printer Option board is described
in Section 2.9.1. Methods of connecting a suitable
printer are described below.