Hanna Instruments ec 700 ユーザーズマニュアル
5
4
• Four different TDS working ranges (0 to 100.0ppm; 0 to
1000ppm; 0 to 10.00ppm; 0 to 100.0ppm) for TDS705
model.
model.
• Possibility to switch to TDS measurements with conversion
factor from 0.00 to 1.00 (EC710 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.
calibration solution values.
• Input:4-ring EC/TDS probe with cell constant 2.0 ± 10%,
or 4-20mA analog input from a transmitter.
• Output:
- isolated 0-1 mA, 10 K
W
maximum load (optional);
- isolated 0-20 mA, 750
W
maximum load (optional);
- isolated 4-20 mA, 750
W
maximum load (optional);
- isolated 0-5 VDC, 1 K
W
minimum load (optional);
- isolated 1-5 VDC, 1 K
W
minimum load (optional);
- isolated 0-10 VDC, 1 K
W
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.
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.
ment functions correctly. Any damaged or defective items must
be returned in their original packing materials together with
the supplied accessories.
GENERAL DESCRIPTION
EC 700, TDS 705 and EC 710 are real time microprocessor-
based EC or TDS controllers. They provide accurate
measurements, flexible ON/OFF or proportional control ca-
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.
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).
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).
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 199.9
µ
S; 0 to
1999
µ
S; 0 to 19.99mS; 0 to 199.9mS) for EC700 and
EC710 models.