FLAME SCANNER VIEWING HEAD FOR FLAME MONITOR
MODELS S550, S552 and S556

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 (ultraviolet) tube. The S550 works with the latest version of the P520/P522 signal processors. Like other viewing heads in the S500 family of viewing heads, the S550 produces output pulse rates proportional 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 S5xx family of viewing heads, certain parameters in the S550 viewing head (UV gain, IR gain and filter selection) can be selected or adjusted remotely from the front panel of the P520/P522 signal processors.
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 re-applied, the signal processor then automatically resends 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 semi-automatic mode which will help to speed up the S550 setup. Thus, the S550 is a dual-sensor viewing head where the gain and filter selections are adjusted and stored remotely by the P520/P522 signal processors.

The IRIS Model S552 has been discontinued and replaced by Model S552B.
Repair of this product is currently still available.

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 adjustments which are appropriate to the S552 will be made available to the operator. These adjustments apply to the S552: a) Filter Selection 1-8 b) IR gain 0-699 When it comes to features like "CAL", 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.

The IRIS Model S556 has been discontinued and replaced by Model S556B.
 Repair of this product is currently still available.

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 appropriate to the S556 will be made available to the operator: a) UV gain 0-99 When it comes to features like "CAL", 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 UV sensor or not.

DISC = Discrimination between burners and flaming background