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Phone: +86 16626708626Description
Key Technical Specifications
| Parameter | Specification |
| Model Number | 85UVF1-1CEX |
| Optical Spectrum | Ultraviolet (UV) spectral range (200 nm to 400 nm) |
| Operating Voltage | 24 V DC (+10%, -15%), 4 W maximum power draw |
| Output Signals | 4–20 mA DC flame signal, internal Flame Relay (N.O./N.C.), Fault Relay |
| Enclosure Rating | ATEX / IECEx certified Ex d IIC T6 (Explosion-Proof / Flameproof) |
| Housing Construction | Cast aluminum enclosure with fused quartz glass lens |
| Operating Temp | -40°C to +70°C (-40°F to +158°F) |
| Cable Entry | Dual M20 × 1.5 or 3/4-inch NPT conduit entry ports |
Product Introduction & Supply Chain Strategy
The Fireye 85UVF1-1CEX is a microprocessor-based, self-checking integrated UV flame scanner designed for continuous-burner industrial boilers, process heaters, and gas turbines. It combines optical UV flame sensing, signal processing, and flame/fault output relays within a single explosion-proof housing, communicating directly with burner management systems (BMS).
Sourcing this scanner as New Surplus guarantees immediate replacement for critical combustion safety loops, preventing emergency furnace shutdowns and costly plant outages. Selecting genuine New Surplus over high-risk refurbished units eliminates degraded UV phototube sensors, heat-stressed internal power supplies, and compromised explosion-proof seal surfaces, ensuring maximum burner uptime while lowering Total Cost of Ownership (TCO).
85UVF1-1CEX
Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
- Shut down burner fuel supply valves and follow plant LOTO safety protocols on the Burner Management System (BMS).
- Verify zero electrical potential across the 24 V DC field wiring using a calibrated multimeter.
- Ensure the sight pipe is clean, free from internal slag, and properly aimed at the primary flame root area.
Stage 2: Removal
- Unscrew the explosion-proof rear cover of the 85UVF1-1CEX housing to access internal wiring terminals.
- Disconnect field power, 4–20 mA output, and relay contact signal leads from the terminal block.
- Unthread the scanner housing from the sight pipe swiveling mount assembly.
Stage 3: Installation (Clone & Seat)
- Mount the new 85UVF1-1CEX onto the sight pipe mounting flange using appropriate high-temperature thread sealant.
- Reconnect terminal wiring (24 V DC, flame relay, fault relay, and 4–20 mA output) according to the BMS wiring schematic.
- Set internal DIP switches or rotary dials for flame sensitivity and gain settings to match the original scanner calibration.
Stage 4: Power-On & Testing
- Replace and tighten the explosion-proof rear cover to maintain ATEX/IECEx ingress and hazardous-area safety ratings.
- Apply 24 V DC power, perform a dark-test (no flame present) to verify zero flame signal, then ignite the burner to confirm stable 4–20 mA flame intensity readings and relay pull-in.
Firmware/Software Versions & Upgrade Notes
- Sensors and Self-Checking: The 85UVF1-1CEX features an internal mechanical shutter for continuous self-checking. Ensure the shutter mechanism clicks periodically during operation; a stuck shutter triggers an automatic fault alarm.
- Sensitivity Calibration: Adjust flame threshold settings using the integrated pushbuttons/DIP switches while observing the LED flame strength indicator. Setting gain too high can cause the scanner to detect background UV radiation or adjacent burner flames.
- Hazardous Area Warning: Never open the explosion-proof rear housing cover while field circuits are energized in a classified hazardous atmosphere.
Frequently Asked Questions (FAQ)
Q: Is this Fireye 85UVF1-1CEX flame scanner brand new?
A: Yes. This unit is 100% New Surplus / Original New stock. It has never been installed on a burner sight pipe, operated in a boiler house, or refurbished. It remains in immaculate condition inside original protective packaging.
Q: Why choose New Surplus over a refurbished flame scanner?
A: Combustion safety systems mandate total reliability. Refurbished flame scanners often carry worn optical sensors and tired mechanical shutters that cause false flame-out trips or dangerous unburned fuel conditions. New Surplus provides factory-fresh optical sensitivity, pristine housing seals, and full operational service life.
Q: How is this legacy Fireye scanner tested prior to dispatch?
A: Every 85UVF1-1CEX scanner undergoes physical lens and thread inspection, 24 V DC power-on verification, internal shutter operation check, and UV light response testing in an ESD-safe facility prior to shipment.
Q: Can I hot-swap the 85UVF1-1CEX scanner while the burner is firing?
A: No. Removing a flame scanner while the burner is firing will trigger an immediate BMS flame-failure trip and safety shutoff. Always place the combustion channel into a safe maintenance state before servicing.
Q: What warranty coverage applies to this item?
A: We provide a full 1-year replacement warranty on all New Surplus inventory. If any functional defect arises under standard operating conditions, we supply an immediate direct replacement or process a full credit.
