4
GENERAL DESCRIPTION
HI700
and
HI710
series are real time microprocessor-based EC or TDS controllers. They
provide accurate measurements, flexible ON/OFF or proportional control capabilities,
analog input and output, RS485 port, dual setpoint and alarm signal.
The system is composed of a case inside which the signal conversion circuitry, the
microprocessor circuitry and the output power drivers are contained.
MAIN FEATURES OF DIFFERENT MODELS
•
Display: large LCD with 4 ½ 17 mm digits and 3 ½ 10 mm digits.
• LEDs: four LEDs are provided for signaling the energizing of relay 1 and 2 (yellow
LEDs) and alarm relays (a green and a red LED).
• Relays: 1 or 2 output relays for low conductivity or high conductivity dosage (COM, NO
and NC contacts) and 1 output relay for alarm condition (COM, NO and NC contacts).
•
RS485 isolated communication link
(
HI700222
and
HI710222
only
).
•
Calibration and Setup procedures allowed only through an unlock password.
• Calibration: 2 points with Hanna Instruments EC and TDS calibration solutions.
• Four different EC working ranges (0 to 199.9µS; 0 to 1999µS; 0 to 19.99mS; 0
to 199.9mS).
• Four different TDS working ranges (0 to 100.0ppm; 0 to 1000ppm; 0 to 10.00ppm;
0 to 100.0ppm) for
HI710
models.
•
Possibility to switch to TDS measurements with conversion factor from 0.00 to 1.00
(
HI710
models only
).
•
Temperature compensation of the Hanna Instruments standard solutions.
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it carefully. For further
assistance, please contact your local Hanna Instruments Office or email us at tech@
hannainst.com.
Note
Save all packing materials until you are sure that the instrument functions correctly.
Any damaged or defective items must be returned in their original packing materials
together with the supplied accessories.
