1633 Combustion Controller Manual - Novatech Controls

OXYGEN PROBE MODEL SELECTION GUIDEHeated probes-temperature range 0-900°C (1650°F).1231 - U Length - Outer - Internal - MountingSheath Thermocouple ThreadBasic model 2. 250mm (10”) 1. 316 SS max 850°C 1. Type K max 900°C 1. 1 ½ BSP3. 500mm (20”) (1560°F) (1650°F) 2. 1 ½ NPT4. 750mm (30”) 2. Inconel *(1)5. 1000mm (40”)6. 1500mm (60”)7. 2000mm (80”)*Note:(1) The Inconel option has all inconel wetted parts except for the ceramic sensor and viton ‘o’ rings.Unheated probes for clean gases-temperature range 700-1400°C (1290-2550°F).1232 - U Length - Outer Sheath - Internal Thermocouple - Mounting ThreadBasic model 3. 500mm (20”) 1. 253 MA-max 1000°C 1. Nil *(2) 1. 3/4” BSP fixed4. 750mm (30”) (1830°F) 4. Type R max 1400°C 2. 3/4” NPT fixed5. 1000mm (40”) 3. High Purity Alumina (2550°F)6. 1500mm (60”) max 1300°C (2370°F) Horizontalmax 1400°C (2550°F) Vertical4. 446 SS max 1000°C (1830°F)1234 SENSOR SPECIFICATIONSRange of measurement:1 ppm to 100% oxygenOutput:EMF = 2.154.10 -2 .T.log e (0.209 / oxygen level of the sample)Accuracy: ± 1%Thermocouple:Type KHeater:110 VAC 50/60Hz, 100 wattsHeater proportional band:80°C (175°F)Speed of Response:Less than 100 millisecondsSample flow rate:1 to 5 litres / minute (120 to 600 scfm)Differential Pressure:80 to 800 mm (3 to 30”) WG gives a flow of 1 to 5 litres / min (120 to 600 scfm)Process Connections:1/4” NPT female, inlet and outletDimensions:300 mm (11.81”) high by 125 mm (4.92”) wide by 88 mm (3.46”) deepWeight:2.2 Kg (4.85 lbs.)1.3 PURGE & CALIBRATION CHECK ACCESSORIESDue to the absolute measurement characteristics of zirconia sensors and the self-calibration features of Novatechanalysers, probe calibration checks with calibrated gas are not normally required. In some installations however,automatic gas calibration checks are required by Environmental Protection Authorities and by engineering managementin Power Stations, Oil Refineries and similar large end users.Novatech probes and analysers provide a ready method of connecting on-line calibration check gases. They provideon-line automatic checking of probe and analyser calibration, as well as a probe purge facility.The absolute characteristics of zirconia sensors require only one calibration check gas to properly check the probe’sperformance. Where required however, the dual gas calibration check facility can be utilised.Dirty flue gas applications often require the back purge facility to keep a probe filter free from blockage. (In theseapplications, it is more reliable to install probes pointing vertically downwards with no filter). Purge and calibrationcheck solenoid valves can be operated manually or automatically from a 1633 analyser.The external components required for automatic / manual gas calibration checking are:• A calibration check gas flow meter / regulator• A mains voltage (240 or 110 VAC) solenoid valve for each calibration check gasAugust 20091633 Combustion Controller 11