Overview:
The WDG Series from Land were the world’s first fullyintegrated stand-alone, flue gas oxygen analyzers. The Genesis 1200 WDG and the Genesis 1210 WDG are rugged and reliable for net oxygen, and use industry-proven zirconium oxide sensor technology.
The outer probe tube is 310 stainless steel so no abrasion shield is needed for most applications.
The integrated/remote controller features precision temperature control for optimum stability, built-in diagnostics, and overtemperature protection. Modbus and 4-20 mA outputs are standard; automatic calibration is available.
Key Features
– Simple Installation and Operation
– 4-key user interface controls all functions
– Service and maintenance carried out on site
– All parts are field replaceable
– Straightforward integration in plant control system
– Measurement systems for most applications
– Wide range of options available
– Outstanding sensor reliability – 2 year warranty
Key Benefits
– Simple User Interface
Simple push-button operation combined with a clear LED display enable complete electronic control of the probe functions. Full setup and diagnostic information is also accessible through the user interface.
– Easy Maintenance
The WDG 1200 is completely field – serviceable. The uniquedesign allows the inner tube structure to be completely removed forservicing, leaving the outer protection tube attached to the process.
– Modbus Communications
Probes can communicate using the RS485 Modbus protocol,for straightforward integration into the plant DCS. There are also both 4-20 mA analog and relay outputs.
– Unique Flexibility
Uniquely mounts the user interface onto the probe itself. This enables complete local control at the measurement location and reduces installation costs. Alternatively, a remote user interface can be supplied.
– Versatile Probe and Mounting
Oxygen probes are available in various lengths with a range of mounting flange options. The dust-protection filter screws into the end of the probe and prevents the sensor from being damaged by flyash.
Specifications
| Genesis WDG 1200 & WDG 1210 Probe | |
|---|---|
| Measuring Range: | From 0 to 1 %, 0 to 25 % O2 v/v |
| Accuracy: | ±1 % of measured value or ±0.05 % oxygen, whichever is greater |
| Response Time: | < 3 secs to calibration gas 63% of a process step change, 20 secs |
| Drift: | < 0.1 % of cell output per month (< 0.005 % O2 per month with 2 % O2 applied) |
| Linearity: | ±1 % of output span |
| Repeatability: | ±1 % of output span |
| Max Flue Gas Temperature: | 1250 °F (677 °C) |
| Sample Pressure: | ±2 psig (± 13.8 kPa) |
| Environment: |
Ambient Temp.: -5 to 160 °F (-20 to 71 °C) Relative Humidity:10 % to 90 %, non-condensing |
| Calibration Gas Requirements: |
Use all calibration gases @ 10 psig, 3 to 6 scfh (0.70 kg/cm2, 1.41 to 2.82 L/min) O2 Span Gas: Air or from 1.0 % to 100 % O2,balance N2 O2 Zero Gas: 2 % or from 0.1 to 10% O2,balance N2 Calibration: Manual, automatic and remote trigger |
| Calibration: | Manual, Automatic and remote trigger |
Note: Performance characteristics are referenced to calibration gas, with all process variables
constant and range of 0 to 10% oxygen
Genesis WDG 1220 Remote Control Unit
| Probe Control Unit | |
| Display / Keypad: | Single-line, 4 digit LED, 4 keys |
| analog Outputs: | Single channel isolated. Max. impedence 500 ohms. Current loop isolation is 1000 V ms |
| Alarms: | SYstem Fault, Maintenance, Calibration in Progress – single pole form C 2A at 30 V ac/dc |
| Communications | Modbus, isolated RS-485 2 wire |
| Environment: | Ambient Temp.: -5 to 160 °F (-20 to 71 °C) Relative Humidity: 10 % to 80 %, non-condensing |
| Enclosure: | IP65 and NEMA 4X |
| Power Requirements: | Nominal 115-230 Vac ±10 %, 47-63 Hz; 4 A 6mm female thread for earth grounding |
| System Compliance: | EMC directive 89/336/EEC Low Voltage Directive 73/23/EEC, CE |
Genesis WDG 1270 Auto-Calibration Unit
| AutoCal Unit | |
|---|---|
| Dimensions:(hxwxd) | 300 x 200 x 155 mm / 11.8” x 7.9” x 6.1” |
| Weight: | 6 kg / 13.2 lbs. |
| Operating Temperature: | 32 – 122 °F / 0 to 50 °C |
| Enclosure Rating: | IP65 / NEMA 4 Protection |
| Power Supply: | Selected to 110 v or 230 v a.c. 50-60 Hz 10VA |
| Supply Tolerance: | -10 %, +20 % |
| Gas Inlet Pressure: | 25 – 30 psi (1.7 to 2.0 bar) |
| Gas Outlet Flow: | 3 to 6 scfh (1.6 to 2.8 l/min) |
| Pressure Switch: | 15 psi (1.0 bar) trip pressure |
| Span (slave) Relays: | 2 x galvanically free changeover relay contacts |
| Control Interface: | Single 8 core hard wire lead to Genesis Control Unit |
| Fuse Rating: | 125 mA @ 230v antisurge, 250 mA @ 110v antisurge |
| Isolation Switch Rating: | 240V 1A (customer supplied) |
| Installation: | Category II |
| Overvoltage: | Category II |
Applications:
– Gas, oil or coal fired boilers
– Power generation
– CCGT
– Petrochemicals
– Process industries
– Pharmaceuticals
