Transmitter AMU pH Redox
The steam which is finally used for power generation, i.e. the steam which goes to the turbines has to be ultra pure. This implies that the water used for generating this steam should be in its purest form. Monitoring the pH value of the feed water gives direct indication of alkalinity or acidity of this water. The ultra pure water has pH value of 7. In steam circuit it is normal practice to keep the pH value of feed water at slightly alkaline levels using chemical dosing. This helps in preventing the corrosion of pipe work and other equipment.
Typical points in the steam circuit where pH should be monitored are : Drum water, High pressure heaters, Make-up condensate, Plant effluent, Condenser, Cooling water.
AMU pH/ Redox Transmitter is single channel Panel mounted 4-wire pH transmitter from SWAN Switzerland. This Transmitter is available with Freely programable Analog Output as well as Relay Board and RS-485 Modbus or Profibus Option
Digitally Enabled
- Sensor connections for a pH or ORP sensor, reference electrode, Pt1000 temperature and for a digital sample flow meter
- Galvanically separated sensor connections
- Automatic temperature compensations according to Nernst with or without correction functions
- Values for pH buffer solutions and redox calibration solution programmable
- Easy user menus in English, German, French and Spanish. Simple programming of all parameters by keypad
- Data logger for 1,500 data records stored at a selectable interval. Serial interface included for data download to PC with Microsoft Hyper Terminal
- Overvoltage protection for inputs and outputs
- Two current outputs (0/4 – 20 mA) for conductivity and temperature signals
- Potential free alarm contact as summary alarm indication for programmable alarm values and for instrument faults
- Two potential free contacts programmable as limit switch or PID-control
- Input for potential free contact to freeze the measuring value or to interrupt control in automated installations (hold function or remote-off)
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Frequently Asked Questions
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