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S550
Applications Manual
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IRIS S552, S550, S556 Applications Manual

IRIS MODEL S550 APPLICATION MANUAL
FLAME MONITORING SYSTEM
MODEL S550, S552, S556 VIEWING HEAD
APPLI CATION MANUAL
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IRIS MODEL S550 APPLICATION MANUAL
TABLE OF CONTENTS
COM PARI SON WITH OTHER MODEL 500 VH’s ...2
TECH NOL OGY USED IN THE S550......................3
CA BLE PREPA RA TION DWG ................................4
FI NAL AS SEM BLY (CA BLE) DWG .........................4
WIR ING OF VIEW ING HEAD .................................5
IR DE TEC TOR ........................................................6
UV DE TEC TOR .......................................................7
ORI FIC ING ..............................................................7
DE FAULT SET TINGS FOR THE S550 ...................8
BEF ORE MAK ING AD JUST MENTS.......................10
NEW P520/P522 FRONT PANEL...........................10
CALI BRAT ING THE S550.......................................10
EX AM IN ING RE SULTS GAIN SET TINGS CALIB ...10
CHECKING OR CHANG ING UV GAIN...................11
CHECKING OR CHANG ING IR FIL TER.................11
CHECKING OR CHANG ING IR GAIN ....................11
MAN UAL SETUP OF THE S550 .............................12
RE TURN TO DE FAULT SET TINGS ........................12
AN GLE OF VIEW ....................................................13
GEN ERAL COM MENTS .........................................13
TECH NI CAL HELP..................................................13
FIGURE 1 FRONT PANEL DRAW ING ....................14
WHERE S550 SET TINGS ARE STORED ..............8
US ING TWO VIEW ING HEADS PER AM PLI FIER .9
FIGURE 2 VH OUT LINE DRAW ING .......................14
FIG 3 FLOW CHART OF S550 PROGRAMMING ...15 FIG 4 FLOWCHART OF S552 PROGRAMMING ...16 FIG 5 FLOW CHART OF S556 PROGRAMMING ...17
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IRIS MODEL S550 APPLICATION MANUAL
S550 GENERAL DESCRIPTION
The IRIS Model S550 is a state- of- the-art flame monitor viewing head utilizing two types of detectors, an IR (infrared) solid state and UV (ultra violet) tube.
The S550’s work with the latest version of the P520/P522 signal processors. Like other viewing heads in the S500 family, the S550’s produce output pulse rates propor tional to the flame signal strength; the pulse rates are displayed at the front panel of the signal processors. But, unlike the other members of the S500 family, certain parameters in the S550 viewing head can be selected or adjusted remotely from the front panel of the P520/P522 signal processors. The parameters are:
a) UV gain 0-99 b) Fil ter Se lec tion 1-8 c) IR gain 0-699
Once adjusted, the new parameters are stored in EEPROM in the signal processor. If power is removed from the signal processor which powers the viewing head and then reapplied, the signal processor then automati cally re-sends the stored parameters out to the S550 viewing head. In addition, at the front panel of the signal processors the operator may also select “CAL”, a semiau to ­matic mode which will help to speed up the S550 setup. This is explained in detail in the section called CALIBRATING THE S550 on page 10. Also notice the FLOWCHART OF S550 PROGRAMMING , Fig ure 3 on page 15. Thus the S550 is a dual­ sensor viewing head where the gain and filter selec tions are adjusted remotely and stored in the P520/P522 signal processors.
S552 GENERAL DESCRIPTION
The S552 is for IR sensing only. It is basically an S550 without a UV capability. The P520 or P522 will be aware of which viewing head of the S550 family is connected to it so that only those adjust ­ments which are appro priate to the S552 will be made available to the operator. These adjust ments apply to the S552:
When it comes to features like CAL, which will be described later, the operator is only given those choices which are appro priate. 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
, Fig ure 4 on page 16.
To keep the manual straightforward only the operation of an S550 is described. If one has an S552 one should simply disregard references to those features of the S550 which are UV-related.
S556 GENERAL DESCRIPTION
The S556 is for UV sensing only. It is basically an S550 without an IR capability. The P520 or P522 will be aware of which viewing head of the S550 family is connected to it so that only the adjustment which is appro priate to the S556 will be made available to the operator:
a) UV gain 0-99
When it comes to features like CAL, which will be described later, the operator is only given those choices which are appro priate. 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 UV sensor or not. This is shown in the FLOWCHART
OF S556 PROGRAMMING
, Fig ure 5 on page 17.
To keep the manual straightforward only the operation of an S550 is described. If one has an S556 one should simply disregard references to those features of the S550 which are IR-related.
COM PARI SON WITH OTHER MODEL 500 SE RIES VIEW ING HEADS
The S550 uses a Germanium sensor for IR detection like an S511 and uses a high- voltage vacuum tube sensor for UV detection like the S506’s, but both sensors are in the same housing in the S550. The pulses from the UV and IR sensors are summed inter nally into a single pulse stream out to the signal processor.
a) Filter Selection 1-8 b) IR gain 0-699
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A dual-LED indicator is used to indicate the pulse rate out of the S550. It is visible at the rear of the
IRIS MODEL S550 APPLICATION MANUAL
viewing head housing. (See Fig. 2). For every 128 pulses from the UV sensor it emits one green pulse; for every 128 pulses from the IR sensor it emits one red pulse. With a count rate of 1200 displayed at the signal processor the LED will flash 9 or 10 times per second. This is very useful for aiming and sighting the viewing head. One can readily distin guish differ ences in pulse rates at the LED and use this indicator to adjust the sighting to obtain a maximum pulse rate at the LED and therefore a maximum reading at the signal processor.
The S550 differs from older models in that the gain for each sensor and the selection of the filter for IR may be set remotely through the front panel of the P520/P522 signal 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
TECH NOL OGY 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 ultra violet light is reflected off the surface of the 45 de gree mirror and yet over 80% of the infrared radiation is trans mitted through the beamsplitting mirror.
The electronics in the S550 is designed using highly reliable surface mount technology.
The high pass frequency responses of eight different filters in the S550 and S552 are imple ­mented compu ta tionally in a high- performance, CMOS micro con troller inside the viewing heads. This approach reduces the parts count and
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IRIS MODEL S550 APPLICATION MANUAL
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IRIS MODEL S550 APPLICATION MANUAL
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
+V
SC
SIG
Power Ground +24 VDC power to view ing head Shut ter Drive Sig nal to V.H. Flame Sig nal from V.H.
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.
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.
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. Connect + 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.
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