Application of Iris Viewing Heads

IRIS MODEL P522 APPLICATION MANUAL

Area circle = πR2

	πR2 = 4mm2
so	R = (4/π)-2= 1.1284
and	dia = 1.1284 X 2 = 2.2568mm
or	dia = 0.0889 inches

Using the same two-inch, focal-length lens and mak- ing this diameter equal to d, we get:

θ= 2 tan-1d/2F

θ= 2 tan-10.0889/2 X 2

θ= 2.545°

The equation for angel of view of a camera lens is derived from:

where tan θ/2 = R/L and R = L tan θ/2

The diameter d = 2Ltan θ/2 which is the same equation as before with F = L but now d, will be the diameter instead of the diagonal.

If you use θ = 2.545°, then the above equation re- solves to:

dia = L (.0444)

L		DIA

FT	INCHES	INCHES

2	24	1.07

3	36	1.60

6	72	3.20

12	144	6.39

16	192	8.53

FIGURE 10 - VIEWING HEAD: ANGLE OF

VIEW - DISTANCE AND DIAMETER

The table in Figure 10 shows the various distances

(L)versus the diameter of the circle of view for the S512 viewing head.

APPLICATION OF IRIS

VIEWING HEADS

It is impossible to provide steadfast rules for each type of viewing head and what application it should be used for. The applications are becoming more difficult because of the wide range of fuels being used, in addition to recent changes in burner design to comply with clean air standards.

The S506 UV viewing head will always result in ex- cellent discrimination between burners. The key fac- tor in using the UV type detector is obtaining a con- sistent and reliable signal under all conditions. UV radiation is very susceptible to being absorbed and blocked by non-hydrocarbon elements and unburned fuel, as explained before. UV type detectors usually work very well on natural gas. However, low NOx type burners utilizing fuel gas recirculation (FGR) can cause problems with UV flame detection.

The S509 “two-colour” photodetector viewing head has been very successful in sulfur recovery applications (Claus reactors) in the gas processing and petrochemi- cal industries. The basic drawback is the nonlinearity of the Si channel caused by the AGC action, as previ- ously explained (see section S509 VIEWING HEAD, and section S512 VIEWING HEAD). Also, the Si channel will not see natural gas.

The S511 Ge viewing head will detect all types of flames (fuels) and has been very successful in de- tecting flame in lime kilns and sulfur recovery reac- tors. The only drawback is the poor discrimination between burners.

The S512 (PbS only) viewing head will detect all types of flames (fuels). The basic drawback (which can be corrected by orificing) is the photodetector saturation on bright flames.

In general, flicker-type detectors work very well when the combustion air, at the root of the burner, is turbulent. They work better on heavy oil and pul- verized coal flames than on natural gas flames. Natu- ral gas burners usually exhibit lower flicker frequen-

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P522 specifications

The IRIS P522 is a highly advanced smart device characterized by its cutting-edge features, technologies, and remarkable performance capabilities. Designed for seamless integration into both personal and professional environments, the P522 stands out as a versatile tool for various applications, ranging from productivity enhancement to entertainment.

One of the main features of the IRIS P522 is its state-of-the-art display technology. The device sports a high-resolution touchscreen that provides vibrant colors and sharp images, ensuring a remarkable visual experience. This impressive display is paired with an ultra-responsive multi-touch interface, allowing users to interact effortlessly with the device, facilitating increased efficiency in tasks such as data entry, navigation, and media consumption.

The performance of the IRIS P522 is powered by a robust processor and ample RAM, enabling it to handle multitasking with ease. This ensures that users can run multiple applications simultaneously without experiencing lags or slowdowns. Additionally, the device incorporates advanced cooling technologies, which help maintain optimal operating temperatures even during intensive use, ensuring reliability over extended periods.

Connectivity is another significant aspect of the IRIS P522. Equipped with the latest wireless technologies, including Wi-Fi 6 and Bluetooth 5.0, the device allows for lightning-fast data transfer rates and seamless connections to a variety of accessories. This makes it an ideal choice for professionals who require constant communication and quick access to cloud-based resources.

Security features are paramount in today's digital landscape, and the IRIS P522 does not disappoint. It includes biometric authentication options such as fingerprint recognition and facial recognition, providing users with a secure way to access their device and data. This focus on security is further reinforced by regular software updates that ensure protection against the latest threats.

Battery life is another highlight of the IRIS P522, with an energy-efficient design that offers extended usage without frequent recharges. This is particularly beneficial for users on the go, as it enables prolonged productivity without being tethered to a power supply.

In conclusion, the IRIS P522 is a remarkable device that harmoniously blends advanced features, powerful technology, and user-centric design. With its stunning display, high performance, effortless connectivity, robust security measures, and extended battery life, the P522 caters to the needs of users in various contexts, making it an indispensable addition to modern digital life.