Description
The THERMOX Model WDG-IV analyzers measure oxygen, combustibles and methane in natural gas-fired applications. They are ideal for gas-fired power boilers or for boilers using natural gas during start-up and shutdown. With these analyzers, you can monitor oxygen and combustibles for maximum fuel efficiency. Available with Series 2000 controller. This analyzer has a close-coupled extractive design for fast response in a wide range of flue gas applications up to 3000°F (1648°C).
Features
- Weatherproof, stainless steel sensor enclosure
- Zirconium oxide oxygen cell
- Catalytic Combustibles detector for 0-2000 ppm
- Catalytic Methane detector for 0-5%
- Class I, Div. 2 or Class I, Div. 1 option
- Two isolated current outputs
- Four alarms
- Diagnostics
- RS-485
- HART option available
- UL Listed
Specifications
| WDG-IV Series Combustion Analyzers | |
| Principle of Operation (O2) | Zirconium oxide for net oxygen measurement and dual catalytic detectors for both combustibles and methane. |
| Output Range (O2) | Oxygen: From 0-1 to 0-100% |
| Accuracy (O2) | ±0.75% of measured value or ±0.05%, whichever is greater Combustibles: ±2% of full scale output range |
| Response | Oxygen: 90% of a step change < 30 seconds |
| Aspirator Air Requirements | 10-20 SCFH (4.7 to 9.4 L/min) Typical at 15 to 100 psig |
| Analog Output | Two 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 |
| Alarms | Two independent oxygen alarms each high or low selectable Set relays to energize or de-energize on alarm |
| Contact Rating | 0.5A, 30V, 10VA max. non-inductive load, AC or DC |
| Digital Communication | 2 wire MODBUS RTU, 57.6 KBaud |
| Configuration | MODBUS RTU, AMETEK configuration software, or AMEVision HMI |
| Diagnostics | Watchdog timer and service alarms. Twenty-entry event log. |
| Calibration | 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 | ±10 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) 1875°F (1024°C) / 310 SS / 36” – 108”(91 cm – 274 cm) 3000°F (1648°C) / Hexoloy® / 24” – 72” (60 cm – 182 cm) |
| Environment | Ambient Temp.: -20°C to 71°C Relative Humidity: 10% to 90%, non-condensing |
| Enclosure | Lift-off NEMA 3R, weather resistant, stainless steel. |
| Power Requirements | 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, 1.53 SCFH (0.7 L/min.)
O2 Span Gas: Air or from 1.0% to 100% O2, balance N2 |
