IRIS MODEL P522 APPLICATION MANUAL

lecting the set points. For instance, selecting a flame

4-20mA REMOTE OUTPUT

 

 

out set point that is equal to or greater than the flame

The standard remote meter output has a 0-20mA

on set point will result in this error indication.

range and is designed to drive remote meters, as ex-

 

As well, the set points can be selected remotely through

plained earlier in this manual. You can convert this

output to a 4-20mA range, as follows:

 

 

the serial communication port using a host computer –

 

 

 

 

 

 

 

 

explained in greater detail later in this manual.

Press the front panel push-buttons (indicated

 

FLAME FAILURE RESPONSE

in the table below) while holding down both

TIME (F.F.R.T.)

the Ý and ß buttons. Press all in each row

together (i.e., three in the first row, two in

The flame failure response time, or F.F.R.T., is de-

the second row, and three in the last row).

fined as the time it takes for the flame relay to de-

 

 

 

 

 

 

energize after the flame signal (from the viewing

 

 

 

 

 

 

FLAME

FLAME

GAIN SET

FFRT

TIME DEL

 

head) drops out. This time delay is programmable

 

ON

OFF

ON

 

 

 

 

from both the front panel of the P522 and a remote,

 

 

 

 

 

 

 

 

 

 

 

 

host computer. Only three settings are possible: one,

X

X

X

 

 

 

two and three seconds.

 

 

 

 

 

 

 

 

 

X

X

 

The maximum time delay is limited to three seconds

 

 

 

 

 

 

 

 

 

 

in compliance with the FM (Factory Mutual) limit

X

X

X

 

 

 

of the F.F.R.T. to not more than four seconds.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The P522 decision-making process occurs on a pe-

FIGURE 6 - REMOTE METER ANALOG

 

 

OUTPUT

 

 

riodic basis, and the decision to start a F.F.R.T. time

 

 

 

 

 

 

 

 

 

 

delay before de-energizing the flame relay is initi-

Doing this toggles the function back and forth be-

ated every second in step with the sampling rate of

tween the 0-20mA and 4-20mA ranges.

 

 

the flame signal. This means that the actual flame

 

 

 

 

 

 

 

 

out condition (i.e., drop-out of the flame signal from

The change will be verified by four dashes “----”

the viewing head) will, in all probability, occur dur-

and “4-20” momentarily displayed. If the module is

ing the sampling period that causes the actual

programmed for the 4-20mA range, “4-20” will be

F.F.R.T. to be greater than the set time.

displayed; toggling back to the 0-20mA range will

For example: suppose the signal from

again cause four dashes to appear on power-up of

the unit. Tha factory default setting are 4-20.

the viewing head drops out immedi-

 

 

 

 

 

 

ately after a sampling from the P522,

One thing to consider when feeding the 4-20mA sig-

and the sampling perceives flame to

nal to a remote computer or DCS, is that there is no

be present. If the F.F.R.T. set point is

isolation between the P522 ground and the remote

set for three seconds, there will be an

system ground. If there is a ground potential differ-

actual time delay of nearly four sec-

ence between the two systems, then there could be

onds. In other words, the actual

serious noise and performance problems. You will

F.F.R.T. will be the current set-point

not encounter this problem when using a remote

time, plus an additional amount of

meter by itself, because it will not be tied into an-

time not exceeding one second, de-

other electrical system (will not be sharing grounds).

pending upon when the flame signal

The bargraph reading on the front panel will not be

from the viewing head drops out.

 

affected by this change to 4-20mA output. It will re-

 

main the same as before (i.e., go to zero on no signal

Page 12

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IRIS P522 manual Flame Failure Response, Time F.F.R.T

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.