Transmitter AMI 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.
AMI pH/Redox Transmitter is single channel wall mounted 4wire 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
- 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
- Overvoltage protection for inputs and outputs
- Two current outputs (0/4 – 20 mA) for measured signals
- Input for potential free contact
- Easy user menus in English, German, French and Spanish. Simple programming of all pa-rameters by keypad
- Electronic record of major process events and calibration data
- Real-time clock for time stamp in data logs and for automated functions
- Data logger for 1500 data records stored at a selectable interval
- 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
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Frequently Asked Questions
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