Phoenix Thermcat functions as a high temperature COD analyzer without ultra- or fine filtration. A large sample stream is taken in via an automatically self-cleaning coarse filter in the sample bypass. In the stripping cell, inorganic carbon is removed through acidification and sparging.

In the rotating slit filter, a substream for analysis is split off directly before the furnace. In the furnace the analysis stream is thermally and catalytically oxidized. After the evolved gas mixture is dried and neutralized, it is measured as CO2 in the IR detector, and reported as COD. The system automatically calibrates itself daily with two COD standards (two point calibration).

• Temperature selectable from 600° C to 900° C (1100° F to 1650° F)
• True continuous operation
• Response time: 3 to 15 minutes
• Measuring range: 2 - 50,000 mg COD/liter (detector dependent)
• Salt trap is easily accessible and can quickly be changed without shutting down
• Catalyst is attached to the outside of the furnace, increasing its useful life and facilitating exchange.
• Self-cleaning rotating slit filter allows only particles of defined size into the furnace.
• Digital and analog output signals for external alarms and controls
• Sample preparation with self-cleaning coarse filter
  

• solids-containing municipal wastewater
• industrial wastewater with dissolved salts
• river water
• cooling water.
• Provide warning of organic spills, to protect expensive processes and equipment in addition to monitoring for regulatory compliance

List of articles - On-line COD applications using Stip COD analysers

• PA2 or PA3 Sample Filter - Required where sample contains particles larger than 200 microns.
• Two stream option
• Isco Carrier Gas Converter - cleans and reduces the CO2 content of compressed air. This accessory must be installed in the air supply line when on-site compressed air is used.
• Low concentration option (Required for 2 - 500 mg/L COD measurement range)
• Volatile salts option
• Fiber handling option
• Standby option for intermittent operation

COD measurement

• Measurment range: Five full-scale ranges from 2-500 mg COD/liter (with low concentration option) to 500-50,000 mg COD/liter
• Detection limit: 2 mg COD/liter (with 500ppm IR detector) and low-concentration option
• Reagent usage: Carrier gas: 100-400 liters/day; Acid: 0.5 liter/day; Standard: 150-300 ml/calibration
• Resolution: 0.1 mg COD/L
• Reproducibility: 4%
• T90 time: 3 - 15 minutes
  

Physical Characteristics - Dimensions (WxHxD); Weight

• BIOX-1010: 645 x 1010 x 400 mm; 65 kg
• BIOX-1010 with PA-2 sample preparation: 757 x 1090 x 400 mm; 70 kg

Electrical and standards conformity

• Mains power: 230 VAC/50 Hz or 60Hz
• Average current: 3.6 A
• Maximum current: 8.15 A
• Enclosure: IP54 (per DIN 40050)
• Protection class: 1 (per IEC 1010)
  Immunity to voltage change: EN50022
• EMC emission: EN 50081-1, 12/96
• EMC noise immunity: EN 50082-2, 12/96
• Certification: CE Mark (Declaration of conformity)
• Test method: per DIN/VDE 0701

Data display, inputs and outputs

• Display: LCD graphics display, 16 lines by 40 characters, backlit
  Keypad: 21 key, 13 x 13 mm
• Data presentation: 6-hour graph (14-day scrollable); current value with 5-digit resolution
• Data storage: 10 days in RAM; 90 days with diskette drive (data interval 2 minutes)
• Monitoring: Logging of warnings, malfunctions, limit value alarms and calibrations for last 4 weeks (90 days with diskette drive), alerts for leakage, deficient wastewater, incorrect reactor temperature, incorrect oxygen reading, broken membrane on oxygen sensor
• Analog outputs: 0 - 20 mA or 4 - 20 mA selectable, electrically isolated load max 500 ohm
• Limit value alarms: Dry contact relay (normally closed) for high limit, low limit, and slope
• Diskette drive: PC-compatible 3.5" diskette drive for data storage
  Computer interface: RS 232C for data output and remote control