The main features of the HI 720 controller series include: - Measurement and control of conductivity or concentration
- Concentration can be measured as usual TDS (fixed ratio) or through custom conductivity/temperature/concentration curves
- Customizing temperature coefficient table and NaCl temperature compensation according to IEC 746-3, in addition to the standard linear compensation
- Auto-ranging
- Display reading offset adjustment for temperature
- Temperature level alarm
- Cleaning in place activated through two cleaning commands, or triggered by a variety of events
- Hold management, including a digital input to enter the hold mode through an external trigger
- Conductivity probe check
- Digital transmitter input
- Pt100 or Pt1000 temperature sensor with automatic recognition and damage test
- Calibration time-out
- Logging of the last 100 error, configuration and cleaning events
- Alarm fault current (3.6 mA or 22 mA)
- SMS messages sending
- Alarm configuration can be customized: different errors can lead different actions (alarm relay activation, fault current, hold mode, automatic cleaning, SMS message)
- RS485 communication with additional capabilities, such as error log file downloading and cleaning commands
- Daily programmable control timing
- Diagnostic features
- Password protection
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