Hanna-instruments HI 720 Series Uživatelský manuál stáhnout pdf (Strana 5)

SPECIFICATIONS

Range 0 to 2000 mS/cm (auto-ranging)

-30 to 130°C / -22 to 266°F

Resolution 1 μS/cm (0 to 1999 μS/cm)

0.01 mS/cm (2.00 to 19.99 mS/cm)

0.1 mS/cm (20.0 to 199.9 mS/cm)

1 mS/cm (200 to 2000 mS/cm)

0.1°C / 0.2°F

Accuracy ±2% f.s. (conductivity) / ±0.5°C / ±1°F

Typical EMC Deviation ±2% f.s. (conductivity) / ±0.5°C / ±1°F

Temp. Compensation Automatic or manual, -30 to 130°C

Temperature Probe 3-wire or 2-wire Pt100 or Pt1000 sensor

with automatic recognition and damage test

Digital Input Digital Transmitter, Hold & Advanced Cleaning inputs

Digital Output 1 digital insulated contact closed upon Hold mode

Analog Output 1 or 2 independent outputs;

0-22 mA (configuring as 0-20 mA or 4-20 mA)

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 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

Environment 0 to 50°C (32 to 122°F); RH max 85% non-condensing

Enclosure Single case 1/2 DIN

Weight Approx. 1.6 kg (3.5 lb.)

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 compensa-

tion 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 dam-

age 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 down-

loading and cleaning commands

• Daily programmable control timing

• Diagnostic features

• Password protection

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