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PRELIMINARY EXAMINATION
Remove the instrument from the packing material and exam-
ine it carefully to make sure that no damage has occurred
during shipping. If there is any noticeable damage, notify
your Dealer or the nearest Hanna Customer Service Center
immediately.
Note Save all packing materials until you are sure that the instru-
ment functions correctly. Any damaged or defective items must
be returned in their original packing materials together with
the supplied accessories.
GENERAL DESCRIPTION
HI 700, HI 705 and HI 710 are real time microprocessor-
based EC or TDS controllers. They provide accurate
measurements, flexible ON/OFF or proportional control ca-
pabilities, analog input and output, 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 con-
tacts).
• Calibration and Setup procedures allowed only through
an unlock password.
• Calibration: 2 points with Hanna 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) for HI 700 and
HI 710 models.
