IRIS S550, Руководство по применению, Страница: 11 / 19

P522 signal processors will continue to work as
they have in the past with an earlier 500 series
viewing head when the channel with that viewing
head is selected.
BEFORE MAKING ADJUSTMENTS
Bef ore making any adjust ments to the S550 one
should optimize the flame signal strength by
aiming the viewing head at the most intense part
of the flame as explained in the two pre vious
sections
IR DETECTOR
and
UV DETECTOR
. This
operation should be done with the default settings.
NEW P520/P522 FRONT PANEL
Please ref er to Fig. 1 at the end of this manual
which shows the current front panel for the
P520/P522. The words
NO
,
CAL
and
YES
are
shown here in black but are actually red. This
latest version of the P520/P522 signal processors
may be used to commu nicate with the S550
viewing heads as described below.
CALIBRATING THE S550
The S550 calibrate feature is designed to aid with
the setup of the S550. It is basically an auto mat ic
gain adjustment for the selected sensor; the gain
for the sensor not selected is set to zero. CAL tries
to bring the displayed count to about 1200. It also
automati cally sets the Flame ON set point at 800
and Flame OFF set point at 600, which control the
Flame Relay. The filter selection remains
unchanged.
Calibration Pro ce dure:
1) Make a quick initial adjustment of the sighting
of the viewing head, trying to obtain a high
pulse rate. Red pulses from the LED indicate
that the IR sensor is producing output pulses;
green pulses indicate that the UV sensor is
producing output pulses.
2) Be sure that the external input for CHAN SEL
is properly set for the channel about to be
calibrated and that the channel LED is on
continu ously. When Using the calibrate
feature one does not have the option of
working with the channel that is not selected
by the external input.
3) Bring the firing rate of the burner to a low fire
condition.
4) If the flame relay has not pulled in, adjust the
flame on & off set points so it does pull in.
5) Decide whether to calibrate using the UV or
I R s e n s o r. S e e e a r l i e r s e c t i o n s o n
I R
DETECTOR
and
UV DETECTOR
.
At the front panel of the P520/P522 press both
A and B push buttons simul ta ne ously. The
display will respond with “CAL?”. Press YES.
The display will then show “CALu”. Press
YES to calibrate the UV response or press NO.
If NO is pressed the display will show
“CALr”. Press YES to calibrate the IR
response. (Pressing NO will return the
P520/P522 to normal operation, exiting the
S550 CAL mode.) The P520/P522 will
automati cally adjust the gain for the selected
sensor; this takes a few seconds. If this
adjustment is successful the display will show
“----”, and the P520/P522 will return to
normal operation, displaying a reading of 1100
to 1300. But if the signal input is too low the
P520/P522 will display “2-Lo”. Press the
RESET button to return to the pre vious
settings. If the signal level is too high, the
display will show “OriF”. (See section on
ORIFICING.
) Press RESET to return to the pre -
vious settings.
6) If step 5 was successful, re-aim the S550 for a
final adjustment using the LED to adjust the
viewing angle for a maximum pulse rate. Then
redo the CAL sequence as in step 5). The
Flame Relay will remain pulled-in. The
display should show a reading between 1100
and 1300.
7) Review the settings for F.F.R.T. And TIME
DELAY ON and adjust if necessary.
EXAMINING THE RE SULTS OF GAIN
SET TINGS FROM CALIBRATION
The gain settings deter mined automati cally by the
forgoing calibration pro ce dure may be viewed by
following the steps below for checking or
changing the UV and IR gain. Changes to these
PAGE 11
IRIS MODEL S550 APPLICATION MANUAL