IRIS S550 Applications Manual Download Page 10

tolerences, so any other S550 will work virtually
the same as the one it replaces.

NOTE: the S550 is designed to work only with
newer P520/P522 signal processors. How ever,
besides working with newer signal processors,
S552’s and S556’s are designed to work also with
older P520/P522 and M502 signal processors;
with these they will operate at their default gain
settings.

AS SIGN ING DIF FER ENT S550 SET TINGS
TO CHAN NEL A AND B

With the P520/P522 an operator may assign one
group of S550 settings to Channel A and another
group of S550 settings to Channel B,  just as he
would assign different Flame ON and Flame OFF
set points to Channels A and B.  How one may
store settings for each channel in the P520/P522
will be briefly reviewed.

If the CHAN SEL input to the P520/P522 is open
or de-energized, then the Channel A lighted push-
 button on the front panel will be continu ously ON. 
If a voltage of 7.5V to 30V is applied across the
two CHAN SEL inputs, then Channel B will be
selected and the Channel B lighted push button
will be continu ously ON. When Channel A is
selected, any P520/P522 parameters changed (this 
includes Flame ON and Flame OFF set points and
the analog gain of the P520/P522 as well as the
gain and filter selection for the S550) will be
stored for use when Channel A is selected.
Similarly, when Channel B is selected any
P520/P522 changes are stored for use when
Channel B is selected. When the CHAN SEL
input is changed, the P520/P522 changes the set
points in use accord ingly and sends the appro -
priate gain and filter selec tions to the S550
viewing head.

In the P520/P522 there is a way to observe and
change settings for the channel which is not
selected: simply press the other channel push
button - it will blink indicating that the selection is 
temporary - and then proceed as if the CHAN SEL 
input had changed. This method is available for
examining or changing Flame ON and Flame OFF 
set points and other settings in the P520/P522. The 
same pro ce dure applies to manually changing

S550 settings when the desired channel is not
selected: press the push- button for the desired
channel and then proceed. During the process of
examining or changing the S550 settings, with the
Channel A and B (NO and YES) push buttons, the
red LED for the channel which the changes apply,
will be blinking.

One should visually check which channel push
button is lighted when the S550 settings are being
reviewed or changed. It is easy to get into the S550 
CAL modes with the wrong channel selected. For
example, if the Channel A LED is on or blinking
and one intends to press both buttons at the same
time to enter the CAL mode for Channel A, but,
instead, one presses the Channel B push button
well bef ore the Channel A push button, the
P520/P522 will think that the operator has
selected Channel B then subse quently pressed
both push buttons. Then, in the CAL modes, the
red LED for Channel B will be blinking, which is
not what was intended. If this happens, one should 
get out of the CAL mode, select the desired
channel, and press both push buttons again to
reenter the CAL mode, but this time pressing both
push buttons at approxi mately the same time.

USING TWO VIEWING HEADS PER
AMPLIFIER

Two viewing heads can easily be hooked up to the
same amplifier using the V.H. A and V.H. B
inputs.  To permit this to work properly the P520
or P522 should be wired so that a 24VDC channel
select signal will be applied simul ta ne ously to the
coil of the VH select relay and to the channel
select input.  Then, when the channel selection is
changed, the alternate set of data inputs from
viewing head B will be switched into the signal
processor by the VH select relay and the processor 
will apply a different group of set points and gains
in response to the A/B Channel switch.

There is no restriction on how viewing heads may
be mixed between the two channels.  One can
have an S550 on one channel and an S511 on
another, or an S552 on one channel and an S556
on another, or any combination.  Of course, the
earlier 500 series viewing heads - Models S506,
S511 and S512 - are not adjustable remotely as the 
S550 family of viewing heads are.  The P520 or

PAGE 10

IRIS MODEL S550 APPLICATION MANUAL

Summary of Contents for S550

Page 1: ...PAGE 1 IRIS MODEL S550 APPLICATION MANUAL FLAME MONITORING SYSTEM MODEL S550 S552 S556 VIEWING HEAD APPLICATION MANUAL ...

Page 2: ... ARE STORED 8 ASSIGNING DIFF S550 SETTINGS TO A B 9 USING TWO VIEWING HEADS PER AMPLIFIER 9 BEFORE MAKING ADJUSTMENTS 10 NEW P520 P522 FRONT PANEL 10 CALIBRATING THE S550 10 EXAMINING RESULTS GAIN SETTINGS CALIB 10 CHECKING OR CHANGING UV GAIN 11 CHECKING OR CHANGING IR FILTER 11 CHECKING OR CHANGING IR GAIN 11 MANUAL SETUP OF THE S550 12 RETURN TO DEFAULT SETTINGS 12 ANGLE OF VIEW 13 GENERAL COMM...

Page 3: ...Filter Selection 1 8 b IR gain 0 699 When it comes to features like CAL which will be described later the operator is only given those choices which are appropriate For example he does not have to choose between calibrating with the UV sensor or the IR sensor in CAL he is only offered the choice of calibrating with the IR sensor or not This is shown in the FLOWCHART OF S552 PROGRAMMING Figure 4 on...

Page 4: ...processors Also the earlier IR sensitive family members had only 4 high pass filters to choose from the S550 has 8 S511 S512 S550 LL 36 Hz 1 16 Hz L 71 Hz 2 24 Hz M 105 Hz 3 33 Hz H 186 Hz 4 52 Hz 5 75 Hz 6 100 Hz 7 155 Hz 8 215 Hz TECHNOLOGY USED IN THE S550 The UV and IR sensors in the S550 share a common optical axis efficiently by using a unique dichroic beamsplitting mirror Over 80 of the ult...

Page 5: ...PAGE 5 IRIS MODEL S550 APPLICATION MANUAL ...

Page 6: ...e done as follows Remove the plug from its packaging and layout the components 1 Strip 2 inches of the cable outer cover from the cable removing any cellophane wrap or filler material and strip the insulation from the shielded wire if insulated over shield a full 2 inches to expose shield 2 Slide the shield back until a bulge develops close to where the wire exits the cable outer covering 3 Carefu...

Page 7: ... entirely The reason for this is that there is a complete change in the flicker content for the existing viewing head sighting If this is the case then one should try and optimize the flame signal for the sour gas by zeroing in on this flame not the warm up burner After optimizing the sighting for the sour gas one may find that the signal level is too low on the natural gas One should then try the...

Page 8: ...ition the zone of higher UV intensity does not overlap the same zones of adjacent or opposing burners so that with proper sighting discrimination is predictable As a general rule the sighting of the S550 when using the UV detector will be more likely a line of sight than the IR flicker detector which will read flame signals bouncing off the side of the sight pipe and other reflectors Sometimes the...

Page 9: ...n the signal level so if the associated S550 and signal processor has been previously calibrated it will be necessary to calibrate the processor again so that the gain settings will be correct If the discrimi nation is still not satisfactory then try an orificing disc with a smaller diameter hole Generally speaking orificing should always be considered when the burner s are large 50K lbs of steam ...

Page 10: ...manually changing S550 settings when the desired channel is not selected press the push button for the desired channel and then proceed During the process of examining or changing the S550 settings with the Channel A and B NO and YES push buttons the red LED for the channel which the changes apply will be blinking One should visually check which channel push button is lighted when the S550 setting...

Page 11: ...ture 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 IR sensor See earlier sections on I R DETECTOR and UV DETECTOR At the front panel of the P520 ...

Page 12: ...r all of the initial setup proce dures described in this manual Further infor mation on how these filters can affect the discrimi nation ratio is found in the P520 APPLICATION MANUAL and in the P522 APPLICATION MANUAL in the section MULTIBURNER REQUIREMENTS For further information please call the factory or contact IRIS Systems Inc See page 13 for contact information CHECKING OR CHANGING IR GAIN Y...

Page 13: ...tinue reducing the gain in steps of 100 until the displayed reading is reduced Then set the gain so the reading is in the 1000 to 1400 range If the IR sensor was not saturated one can skip paragraph 5 below 5 If the S550 was saturating one should check the aiming of the S550 again using the LED on the back of the housing to adjust the viewing angle of the head for a maximum pulse rate If the LED p...

Page 14: ...vative product that this is the ultimate state of the art flame monitor The way it works has been described only in a general sense and obviously the algorithms implemented by the embedded controller software are proprietary and will not be made public Any existing P520 or P522 signal processor can be upgraded to an S550 compatible processor by changing the controller chip and the front panel TECH...

Page 15: ...PAGE 15 IRIS MODEL S550 APPLICATION MANUAL Figure 1 Figure 2 ...

Page 16: ...IRIS MODEL S550 APPLICATION MANUAL PAGE 16 Figure 3 ...

Page 17: ...PAGE 17 IRIS MODEL S550 APPLICATION MANUAL Figure 4 ...

Page 18: ...PAGE 18 IRIS MODEL S550 APPLICATION MANUAL Figure 5 ...

Page 19: ...PAGE 19 IRIS MODEL S550 APPLICATION MANUAL 5 June 1997 ...

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