- General Details
THERMOX WDG-V Combustion Analyzer
Prevention is so Easy…
Living Through a Disaster Isn’t
The reliable identification of low combustion oxygen in a fired heater or boiler has always been critical to the effectiveness of the Burner Management System for proper control and safety.
Low emission burners and aggressive firing control points to achieve increased efficiency and emission reductions have driven the industry to tighter control measures. But tighter control measures also hold a greater potential for combustion events. Reducing the risk of a combustion event has become a priority and has led to the implementation of Safety Instrumented Systems (SIS). This additional layer of safety is added to the Basic Process Control System.
The WDG-V has been designed to provide an additional layer of safety with the measurement of excess O2, Combustibles and Methane and by using these measurements to ensure the safe operation of the Burner Management System.
Precise control of low O2 setpoints with confidence
CO detection for control interlocks and safety shutdown
SIL 2 Capable for SIS implementation of IEC 16508/61511
The THERMOX WDG-V AMEVision Display Unit Interface enables the convenience of site calibration and communication with the analyzer on a user-friendly screen.
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|Principle of Operation (O2)||
Zirconium oxide for net oxygen measurement and dual hot-wire catalytic detectors for both combustibles and methane.
Oxygen: From 0-1 to 0-100%
±0.75% of measured value or ±0.05%, whichever is greater
Oxygen: 90% of a step change < 11 seconds with Flame Arrestors
|Aspirator Air Requirements||
3 SCFH Typical at 3 to 6 psig, Instrument air or Nitrogen
Three isolated linear current outputs for O2, combustibles and hydrocarbon. Each output can be 4-20 mA, 0-20 mA, 20-4 mA or 20-0 mA and is fully scalable. NAMUR Configurable. Hold or track during calibration. Max. load 1200 Ω
Five independent, NO alarms
|Contact Rating||0.5A, 30V, 10VA max. non-inductive load, AC or DC|
|Digital Communication||2 wire MODBUS RTU, 57.6 KBaud|
MODBUS RTU, AMETEK configuration software, or AMEVision HMI
Low Sample Flow, Cell & Detector age tracking, Cell resistance, Calibration required, Analog current verification
Calibrate or verify calibration. Stored calibration and verification data. Selectable calibration gas run time and process recovery time. Timed automatic calibration with optional Remote Calibration Unit.
|Sample Pressure||±6 in. water gauge|
|Max. Sample Dewpoint||392°F (200°C)|
|Max. Flue Gas Temp. / Probe Type / Lengths||
1300°F (704°C) / 316 SS / 36” – 108”(91 cm – 274 cm)
Ambient Temp.: -25°C to 65°C
Hinged IP65 (NEMA 4X), weather resistant, stainless steel, explosion-proof, purged, and floor mount versions available.
115 VAC, ±10%, 47-63 Hz, 740 VA max.; 230 VAC, ±10%, 47-63 Hz, 740 VA max.
|Calibration Gas Requirements||
Use calibration gases @ 10 psig, 1.5 SCFH (0.7 L/min.)
O2 Span Gas: Air or from 1.0% to 100% O2, balance N2
- Hinged IP65 (NEMA 4X)
- UL Class I, Div II, Gp B, C, D or ATEX Zone 2, T3 with Purge