Conductivity Process Digital Controller$865.00
Extremely accurate and simple to install, Hanna's innovative high-specification 720 series conductivity controllers offer economical, constant monitoring of Electrical Conductivity (EC). HI720 is a PID, PI, proportional or on/off EC/TDS controller with one or two set points.
- RS485 communication with additional capabilities, such as error log file downloading and cleaning commands.
- Alarm configuration can be customized: different errors can lead different actions.
- Mount probes directly or use a digital transmitter for large distances.
Thank you for your interest in our products. A representative will contact you within the next 2 hours.
Short Messaging Service (SMS)
It is possible to connect the controller to a GSM cellular engine (HI 504900 or HI 504901). This connection enables the instrument to send SMS to one (or two) cellular phone(s) and through this feature the device can be monitored at any moment. Moreover, if an error occurs on the HI 720, it is possible to receive an alarm SMS which immediately advises about the problem.
The cleaning feature allows an automatic cleaning action of the probe. Simple cleaning, with water only, can be triggered only by a timer (periodical cleaning) or by an error for which a cleaning action can be configured. Advanced cleaning, with water and detergent, it can be triggered by a variety of events.
Continuous Temperature Monitoring
Temperrature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with ATC of conductivity. Conductivity temperature compensation parameters are fully customizable: linear or non-linear temperature compensation, reference temperature and temperature coefficient. Users can define the specific curve of temperature compensation.
Programmable Hold System
The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.
The controller logging feature can save the last 100 error, configuration, calibration and cleaning events. This information can be accessed from a PC through RS485 and HI92500 software.
Fail-Safe Alarm System
Hanna’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. An alarm condition is indicated by a red LED, located directly on the front panel.
Specification Name Detail sku HI720 Series EC Range 0 to 2000 mS/cm (auto-ranging) EC Resolution 1 μS/cm (0 to 1999 μS/cm)
0.01 mS/cm (2.00 to 19.99 mS/cm)
0.1 mS/cm (20.0 to 199.9 mS/cm)
1 mS/cm (200 to 2000 mS/cm)
EC Accuracy (@20°C/68°F) ±2% f.s. Temperature Range $-30 to 130°C / -22 to 266°F Temperature Resolution 0.1°C / 0.2°F Temperature Accuracy (@20°C/68°F) ±0.5°C / ±1°F Typical EMC Deviation ±2% f.s. (conductivity) / ±0.5°C / ±1°F Digital Inputs Digital Transmitter, Hold & Advanced Cleaning inputs Digital Output 1 digital insulated contact closed upon Hold mode Temperature Compensation Automatic or manual, -30 to 130°C Analog Input 1 or 2 independent outputs; 0-22 mA (configuring as 0-20 mA or 4-20 mA) Probe Temperature Probe: 3-wire or 2-wire Pt100 or Pt1000 sensor with automatic recognition and damage test Dosing Terminals 1, 2, 3 or 4 electromechanical relays SPDT; 5A-250 Vac, 5A-30 Vdc (resistive load); fuse protected: 5A, 250 V fuse Power Supply 24 Vdc/ac, or 115 Vac or 230 Vac or 100 Vac ±10%, 50/60 Hz; fuse protected: 400 mA, 250 V fast fuse Power Consumption 10 VA Max. Oscillation Frequency 8 MHz Alarm Relay 1 electromechanical relay SPDT; 5A-250 Vac, 5A-30 Vdc (resistive load); fuse protected: 5A, 250 V fuse Environment 0 to 50°C (32 to 122°F); RH max 85% non-condensing Enclosure/ Case Material Single case 1/2 DIN Weight Approx. 1.6 kg (3.5 lb.)
- Product Manuals