IC3600SFUA1 - Speed Fuel Comparator Card

SPECIFICATIONS

Part No: IC3600SFUA1
Manufacturer: General Electric
Function: Speed Fuel Comparator Card
Series: Mark I and II
Repair: 3-7 Day
Availability: In Stock
Country of Manufacturer: United States (USA)

Functional Description

IC3600SFUA1 is a Speed Fuel Comparator Card developed by GE. It is a part of Mark I and II control system. The unit is a critical component in controlling and monitoring fuel flow. It incorporates two PR/A converters that process signals from separate sensors, generating analog signals proportional to sensor frequencies. These signals are then selected and amplified, producing a negative analog signal at FFN, serving as the fuel flow feedback for the SFKC regulator. The unit offers adjustable frequency ranges by configuring jumpers and includes a comparator that triggers an alarm if the PR/A converter signals differ significantly.

Features

• Dual PR/A Converters: Contains two PR/A converters, each of which receives a signal from a separate sensor. These converters are responsible for translating the input signals from the sensors into analog signals at OUT 1 and OUT 2, respectively. These analog signals are proportional to the frequency of the input signals from the sensors.
• Signal Selection and Amplification: Features a signal selection mechanism that identifies the larger of the two analog signals generated by the PR/A converters. This selected signal is then amplified to produce a negative analog signal at FFN. This FFN signal serves as the feedback signal for the SFKC regulator, crucial for managing fuel flow.
• Adjustable Frequency Ranges: Offers flexibility in processing different frequency ranges from the sensors. This flexibility is achieved by configuring the jumpers between A, B, C, and D for the first PR/A converter and E, F, G, and H for the second PR/A converter. These jumpers allow the unit to adapt to various input signal characteristics.
• Comparator for Alarm and Trip: A comparator within the unit evaluates the two analog signals generated by the PR/A converters. It outputs an alarm signal (set to 1) if the two signals differ by more than a predetermined percentage of the nominal signal. Additionally, the high signal selected from the converters is compared to the fuel flow reference. If the feedback signal exceeds the reference and input IDHA is set to "1," an output trip is triggered. The presence of a "0" in the input IDHA inhibits the trip function.

Adjustments

• GAIN 1 (R102): This adjustment parameter allows for fine-tuning the gain of the first PR/A converter. By configuring R102, you can control the amplification and scaling of the analog signal produced by the first converter.
• GAIN 2 (R101): Similar to GAIN 1, this adjustment, represented by R101, provides control over the gain of the second PR/A converter, allowing you to adjust the amplification and scaling of the second analog signal.
• TRIP (R103): R103 is used for setting the trip function. It likely determines the threshold for when the trip function is activated, based on the comparison between the selected high signal and the fuel flow reference.
• These adjustments are crucial for calibrating and fine-tuning the unit to ensure that it accurately monitors and controls fuel flow within the specified parameters. Properly configured gain settings and trip thresholds are essential for the reliable operation of the system.

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FREQUENTLY ASKED QUESTIONS

What is IC3600SFUA1?
It is a Speed Fuel Comparator Card developed by GE

How does the unit handle sensor signals?
It contains dual PR/A converters, each receiving signals from separate sensors. These converters translate sensor signals into proportional analog outputs at OUT 1 and OUT 2.

What is the role of signal selection and amplification in the unit?
The unit selects the larger of the two analog signals from the converters and amplifies it to produce a negative analog signal at FFN, which serves as feedback for the SFKC regulator, essential for fuel flow management.

Can the unit adapt to different sensor frequency ranges?
Yes, it's designed for flexibility. You can configure jumpers to accommodate various input signal characteristics, making it adaptable to different frequency ranges.

How does the unit handle signal discrepancies and trigger alarms or trips?
The unit utilizes a comparator to evaluate the two analog signals. It triggers an alarm when the signals differ significantly from the nominal signal and initiates a trip if the feedback signal exceeds the reference and input IDHA is 1, with inhibition of the trip function when IDHA is 0.

What are the main adjustments in the unit?
The unit features three critical adjustments- GAIN 1 (R102) for the first PR/A converter, GAIN 2 (R101) for the second PR/A converter, and TRIP (R103) to set the trip threshold. These adjustments are crucial for calibrating and fine-tuning the unit to maintain accurate fuel flow control.