HI-720224-2 Conductivity Process Digital Controller
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HI-720224-2
Make process monitoring easy and affordable with a high-spec controller from our digital control series.
HI-720224-2 Conductivity Process Digital Controller
Extremely accurate and simple to install, Hanna’s innovative high-specification 700 series controllers offer economical, constant monitoring of pH, Oxidation Reduction Potential (ORP), and Electrical Conductivity (EC).
Using the new Tele-control™ technology, it enables users to control the unit from any distance at all times allowing optimisation of operations such as maintenance cycles.
Two-way communication supplied by the RS485 output and Windows® compatible software means users can control the complete regulation process from their PC or through SMS via mobile phone.
- Sensor Check™ - fault finder
- CAL Check™ – Alerts users of calibration status
- ATC – Automatic temperature compensation
- Logging – Logging of up to 100 system events
The HI-720224-2 is a PID, PI, proportional or on/off EC/TDS controller with one or two set points and includes an inductive conductivity probe.
The measurement configuration settings and EC and TDS control are saved separately and allow users to switch between EC and TDS without losing settings.
Temperature is continuously monitored using a temperature sensor (pt100 or Pt1000 type) with ATC of conductivity.
One or two analogue controller outputs (0-20 or 4-20mA) can be configured for recording or controlling (only for models with PID), and up to 4 relays can be used to control the process or be connected with alarm status. Controller status is visible with LEDs on the front panel and on LCD.
In general, the compact, easy-to-use controllers are designed to consistently perform in most environments and conditions twenty-four/seven.
There is no need to worry about space or cost, as all the controllers can be installed in confined spaces and the low cost means previously manual monitoring can now be automated, saving time and money.
The controllers have large, easy-to-read displays, fire-retardant casing, proportional control, full PID Control, password protection, analogue or digital transmitter input, data logging, programmable cleaning cycles and fail safe alarm systems.
| Range | 0 to 2000mS/cm (autoranging); -30 to 130°C/-22 to 266°F | |
| Resolution | 1 μS/cm (0 to 1999 μS/cm; 0.01 mS/cm (2.00 to 19.00 mS/cm); 0.1 mS/cm (20.0 to 199.9 mS/cm); 1mS/cm (200 to 2000 mS/cm); 0.1° C/0.2° F | |
| Accuracy (@25°C/77°F) | +-2% f.s. (conductivity) / +-0.5°C/ +-1°F | |
| Temperature Compensation | automatic or manual, -30 to 130°C | |
| Temperature Probe | Three-wire to two-wire Pt100 or Pt1000 sensor with automatic recognition and damage test | |
| Digital Input | Digital transmitter, hold and advanced cleaning inputs | |
| Digital Output | One digital insulated contact closed upon hold mode | |
| Analogue Output | One or two independent outputs; 0-22 mA (configuring as 0-20 mA or 4-20mA | |
| Digital Serial Output | RS485 | |
| Dosing Relay | 1, 2, 3, or 4 electromechanical relays SPDT; 5A-250 VAC, 5A-30 VDC (resistive load), fuse protected; 5A, 250 V fuse | |
| Alarm Relay | 1 electromechanical relay SPDT; 5A-250 VAC, 5A-30 VDC (resistive load), fuse protected; 5A, 250 V fuse | |
| Installation Category | II | |
| Power Supply (depending on model) | 24 VDC/ac, or 115VAC or 230VAC or 100VAC +-10%, 50/60 Hz; fuse protected; 400mA, 250V fast fuse | |
| Power Consumption | 10 VA | |
| Max Oscillation Frequency | 8MHz | |
| Environment | 0 to 50°C (32 to 122°F); RH max 85% non-condensing | |
| Enclosure | Single case 1/2DIN | |
| Weight | 1.6kg (3.5lb) | |
| Probes (available separately) | HI-7610 Stainless steel Pt100 probe with front and back 1/2"NPT thread and 5m (16.4') cable HI-7611 Glass Pt100 probe with front and back 1/2" NPT thread and 5m (16.4') cable HI-7620 Stainless steel Pt1000 probe with PG 13.5 thread and 5m (16.4') cable HI-7621 Glass Pt 1000 probe with PG13.5 |
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| Specification | HI-720 | |
| Range | 0 to 2000mS/cm (autoranging); -30 to 130°C/-22 to 266°F | |
| Resolution | 1 μS/cm (0 to 1999 μS/cm; 0.01 mS/cm (2.00 to 19.00 mS/cm); 0.1 mS/cm (20.0 to 199.9 mS/cm); 1mS/cm (200 to 2000 mS/cm); 0.1° C/0.2° F | |
| Accuracy (@25°C/77°F) | +-2% f.s. (conductivity) / +-0.5°C/ +-1°F | |
| Temperature Compensation | automatic or manual, -30 to 130°C | |
| Temperature Probe | Three-wire to two-wire Pt100 or Pt1000 sensor with automatic recognition and damage test | |
| Digital Input | Digital transmitter, hold and advanced cleaning inputs | |
| Digital Output | One digital insulated contact closed upon hold mode | |
| Analogue Output | One or two independent outputs; 0-22 mA (configuring as 0-20 mA or 4-20mA | |
| Digital Serial Output | RS485 | |
| Dosing Relay | 1, 2, 3, or 4 electromechanical relays SPDT; 5A-250 VAC, 5A-30 VDC (resistive load), fuse protected; 5A, 250 V fuse | |
| Alarm Relay | 1 electromechanical relay SPDT; 5A-250 VAC, 5A-30 VDC (resistive load), fuse protected; 5A, 250 V fuse | |
| Installation Category | II | |
| Power Supply (depending on model) | 24 VDC/ac, or 115VAC or 230VAC or 100VAC +-10%, 50/60 Hz; fuse protected; 400mA, 250V fast fuse | |
| Power Consumption | 10 VA | |
| Max Oscillation Frequency | 8MHz | |
| Environment | 0 to 50°C (32 to 122°F); RH max 85% non-condensing | |
| Enclosure | Single case 1/2DIN | |
| Weight | 1.6kg (3.5lb) | |
| Probe (available separately) | HI-7610 Stainless steel Pt100 probe with front and back 1/2"NPT thread and 5m (16.4') cable |
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