Fireye InSight II Marine Flame Scanner

Blowing: First, turn on the cooling air and blow the observation tube for at least 5 minutes before it can be put into operation.

6.2 Electrical Wiring

Taking an 8-core cable as an example, the typical wiring allocation is as follows (refer to the standard configuration, actual should be based on the product manual):

Core wire color/number signal description

Red+24V DC power supply positive pole

Black 0V/negative pole of common terminal power supply

White FR1 relay normally open flame relay 1 contact

Green FR1 relay public

Brown FR2 relay normally open flame relay 2 contacts

Blue FR2 relay public

Yellow fault relay normally open fault alarm

Orange Fault Relay Public

Shielding/disturbance wire grounding control cabinet side single end grounding

Attention: 4-20mA analog output requires additional core wires, which are included if using a 12 core cable. The analog output is of the current source type and can be directly connected to the analog input module of the PLC (load ≤ 500 Ω).

After the wiring is completed, use a multimeter to check for short circuits or short circuits to ground before powering on.

Detailed Explanation of Configuration and Programming

InSight II is locally configured through the VFD display screen and membrane keyboard on the front panel. It can also be remotely connected through the Fireye Explorer software (requiring a dedicated communication adapter).

7.1 Main Adjustable Parameters

Parameter group parameter range/options

Sensor selection flame relay 1 signal source UV/IR/UV+IR/UV or IR

The signal source of flame relay 2 is the same as above

Gain UV gain 0~100% (usually pre-set to 50)

IR gain 0~100%

Modulation frequency selection 1-21 (corresponding to different Hz)

Flame relay suction threshold 0~100% flame intensity

Release threshold 0-100% (usually below the suction value)

Suction delay 0-10 seconds

Release delay of 0-10 seconds

Analog output 4mA corresponds to intensity 0~100%

20mA corresponds to intensity 0~100%

File management, storage/retrieval of files 1-4

7.2 Auto Config function

For situations where the optimal parameters are uncertain, automatic configuration mode can be used. The scanner will automatically detect the modulation frequency and intensity of the flame, and recommend a set of parameters (gain, frequency, threshold). The operator can accept the recommended values or manually adjust them based on them. Automatic configuration will not overwrite existing relay delay settings.

7.3 Four Programmable Files

Marine boilers typically burn multiple fuels (light diesel, heavy oil, natural gas), and the flame characteristics of different fuels vary greatly. Users can store parameters for fuel mode in file 1, gas mode in file 2, and low load mode in file 3. File switching can be done through external dry contacts (requiring wiring) or manually selected from the keyboard. This greatly facilitates the optimization of flame detection for multi fuel boilers.

7.4 Analog output calibration

Two 4-20mA outputs correspond to the real-time flame intensity (percentage) of FR1 and FR2, respectively. Users can set intensity values corresponding to 4mA and 20mA. For example, if 4mA=0% flame and 20mA=100% flame, then linear output is required. It can also be set in reverse (4mA corresponds to 100%, 20mA corresponds to 0%) for certain special PLC logic.

On site debugging and troubleshooting

8.1 Debugging steps

Pre power on inspection: Confirm that the power supply voltage is correct, the cable connection is not short circuited, and the cooling air is turned on.

Power on: The VFD display screen should light up and show the software version and self-test information. The faulty relay may operate during self inspection and return to normal after a few seconds.

View real-time flame intensity: Go to the menu and select "Live Reading", while observing the raw intensity values of UV and IR (0~100%).

Auto Configuration: Start Auto Config, and the scanner will automatically analyze the current flame. After completion, check the recommended frequency and gain.

Manual optimization: If the automatic configuration effect is not ideal (such as large fluctuations in flame signals), manually adjust the gain to achieve a flame intensity of 70-90% at full load, while the background (without fire) intensity is below 10%. When selecting the modulation frequency, you can try observing the stability of intensity readings at different frequencies and choose the frequency that maximizes the signal.

Set relay threshold: The pull in threshold should be set to be higher than the maximum background intensity when there is no fire, with margin left; The release threshold should be lower than the suction value to prevent shaking. The usual suction threshold is set at 30-40%, and the release threshold is set at 15-20%.

Test flame failure response: Manually turn off the fuel or block the scanner's line of sight while the boiler is running, confirm that the flame relay disconnects after a release delay, and the 4-20mA output drops to the corresponding value of 0%.

Analog output verification: Measure the 4-20mA loop current with a multimeter and compare it with the intensity percentage displayed on the screen. If there is no match, you can perform analog output fine-tuning (by entering the service menu).