The **F2VS-CF-R/Q** typically refers to a specialized series of **Flame Sensors** (often UV or IR based) used in industrial combustion control systems, most notably associated with brands like **Azbil (formerly Yamatake)** or similar burner management system manufacturers. --- ## 1. Technical Specifications Overview The "F2VS" series is designed for continuous monitoring of gas or oil flames. Below is a breakdown of its core electronic and functional characteristics: | Feature | Specification Details | | :--- | :--- | | **Detection Type** | Ultraviolet (UV) or Infrared (IR) spectral monitoring | | **Supply Voltage** | Typically 24V DC or integrated into a 100-240V AC controller loop | | **Response Time** | High-speed detection (usually < 1 second) | | **Connection Type** | Circular connector (often military-style or industrial M-series) | | **Housing** | IP65 or IP66 rated (Dust-tight and water-resistant) | | **Ambient Temp** | -20°C to +60°C (standard operating range) | --- ## 2. Key Electronic Components The internal architecture of the F2VS-CF-R/Q consists of three primary stages: ### A. Sensing Element (The "Eye") * **UV Tube:** A high-sensitivity gas-discharge tube that reacts only to the ultraviolet radiation present in a flame (185 to 260 nm range). It ignores sunlight and incandescent light from furnace walls. * **Photo-diode (IR versions):** Used for solid fuel or heavy oil where UV might be obscured by smoke. ### B. Signal Processing Circuitry * **Pulse Conversion:** The raw discharge from the UV tube is converted into a pulse train. * **Amplification:** Low-level signals are amplified to ensure they can travel over long cable distances without interference. * **Filtering:** Electronic filters remove 50/60Hz line noise to prevent "false flame" readings caused by electrical interference. ### C. Output Interface * **The "R/Q" Suffix:** Usually denotes the specific output protocol or connector orientation (e.g., Right-angle connector or specific Quick-disconnect pinout). * **Current Loop/Relay:** It provides a signal back to the Burner Control Unit (BCU) to maintain the fuel valve in an open position. --- ## 3. Wiring and Integration The electronic interface is generally designed for "Fail-Safe" operation. If any internal component fails or the flame goes out, the circuit breaks, triggering an immediate safety shutdown. ```yaml Pin Configuration (Typical): Pin 1: Power Input (+) Pin 2: Common/Ground (-) Pin 3: Flame Signal Output Pin 4: Shield/Earth ``` --- ## 4. Maintenance and Safety * **Lens Cleaning:** Because it is an optical electronic part, any soot buildup on the quartz lens will attenuate the signal. * **Component Aging:** UV tubes have a finite lifespan (measured in thousands of hours). Electronic degradation will manifest as "Flame Failure" alarms even when a flame is visible.