Hanna Instruments HI 700 Series - Manual (Page 3)

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• Four different EC working ranges (0 to 199.9 μS; 0 to
1999 μS; 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 HI 710
models.
• Possibility to switch to TDS measurements with conversion
factor from 0.00 to 1.00 (HI 710 models only).
• Temperature compensation of the HANNA standard solu-
tions.
• Temperature compensation of the EC and TDS reading with
temperature coefficient ß selectable from 0 to 10%/°C.
• Manual temperature setting when the temperature probe is
not inserted or temperature exceeds the upper range.
• Last calibration data internally recorded (non-volatile EE-
PROM memory): calibration date and time, cell constant,
calibration solution values.
• Input: 4-ring EC/TDS probe with cell constant 2.0 ± 10%,
or 4-20mA analog input from a transmitter.
• Output (HI 700221 and HI 710221 only):
- isolated 0-1 mA, 10 K Ω maximum load (optional);
- isolated 0-20 mA, 750 Ω maximum load (optional);
- isolated 4-20 mA, 750 Ω maximum load (optional);
- isolated 0-5 VDC, 1 K Ω minimum load (optional);
- isolated 1-5 VDC, 1 K Ω minimum load (optional);
- isolated 0-10 VDC, 1 K Ω minimum load (optional).
• Real time clock.
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 and HI 710 series 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, 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 con-
tacts).
• RS485 isolated communication link (HI 700222 and HI
710222 only).
• Calibration and Setup procedures allowed only through
an unlock password.
• Calibration: 2 points with Hanna EC and TDS calibration
solutions.