IRIS S550 Applications Manual Download Page 6

increases the reliability of the S550 compared to
earlier approaches that used discrete analog
compo nents to implement four active filters. The
micro con troller also handles commu ni ca tions
with the P520/P522 signal processors.

WIRING OF VIEWING HEAD

Wiring of the viewing head is made to the
terminals on the rear backplane PC board (or
output module) on the P520 signal processor and
is made to the terminals on the lower right side of
the P522. These terminals are listed functionally
as follows:

TERM

DE SCRIP TION

GND

Power Ground

+V

+24 VDC power to view ing head

SC

Shut ter Drive Sig nal to V.H.

SIG

Flame Sig nal from V.H.

SIG GND

Sig nal Ground

The figures on the previous pages show a four
conductor cable to the viewing head. Note that the
flame signal wire going to terminal SIG is
shielded and the shield is termi nated at both ends
of the cable(SIG GND).

The standard IRIS Model 500 cable is desig nated
as part number C328. It is specified as a four
conductor cable with one wire shielded. The
shield is used as the signal ground wire which
goes to terminal SIG GND on the P520/P522 and
to pin 3 on the viewing head plug. The shield is a
braided type for this appli cation (a foil type shield
should not be used) so that a solid signal ground is
maintained. This signal ground shield is also the
self- checking or shutter drive circuit return path. It 
is recom mended that the IRIS cable be used for all 
appli ca tions. Ref er to the diagrams on pages 3 and 
4 for wiring details.

Connec tions of the IRIS cable to the viewing head
plug should be 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 cello phane 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. Carefully spread a few strands of the shield at

the bulge (making sure not to break any
strands) to cre ate an opening and slip wire out
of shield through opening.

4. Carefully return shield to original shape and

length by pulling gently, then cover with
plastic shrink tubing to prevent shorts.

5. Slide nut (with threads toward the cable end),

the washer and the grommet onto cable
approxi mately 6 inches.

6. Slip the cable through the bottom opening of

the connector making sure that the cable outer
jacket is secure under the cable clamp and
tighten the two screws on the cable clamp.

7. Reassemble the grommet, flat washer, and

cable entry nut and tighten.

8. Bef ore wiring to connector, strip each wire

3/8" as shown in assembly drawing on pre 

-

vious page.

9. Proceed to wire the connector as follows: (Ref 

-

er to drawings on page 3 for terminal
locations.)

Connect viewing head signal wire (the shielded
wire) WHT to terminal No. 1 by inserting into
opening and then tight ening the retaining screw.
Connect the self- checking signal wire BLK to
terminal No. 2. Connect the signal ground shield
from WHT wire with shrink tubing to terminal
No. 3. C 24 VDC power wire RED to
terminal No. 4. Connect the power ground wire
GRN to terminal No. 5. Assemble the back of the
plug and insert jackscrew through plug assembly.

PAGE 6

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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