5
4
• Calibration: for
pH 502
series at 1, 2 or 3 points with pH
4.01, 7.01 and 10.01buffers; for
mV 602
series at 1 or 2
points at 0, 350 and 1900 mV.
• Temperature compensation of the HANNA standard buff-
ers (for
pH 502
series only).
• Temperature compensation of the pH reading (for
pH 502
series only).
• 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, pH offset, pH
slopes, number of calibration points and correspondent
pH values (for
pH 502
series only) or calibration date and
time and the mV calibration points used (for
mV 602
se-
ries only).
• Input: pH electrode with BNC connector.
• ±5 Vdc output for amplified electrodes.
• Output:
- isolated 0-1 mA, 10 K maximum load (optional);
- isolated 0-20 mA, 750 maximum load (optional);
- isolated 4-20 mA, 750 maximum load (optional);
- isolated 0-5 Vdc, 1 K minimum load (optional);
- isolated 1-5 Vdc, 1 K minimum load (optional);
- isolated 0-10 Vdc, 1 K 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
The product is a real time microprocessor-based pH or ORP
controller. It provides accurate measurements, flexible
ON/OFF or PID control capabilities and dual alarm sig-
nals.
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: three (
mV 602
) or four (
pH 502
) LEDs are pro-
vided for signaling the energizing of relay 1 (a yellow LED),
relay 2 (a yellow LED in
pH 502
series only) and alarm
relays (a green and a red LED).
• Relays: 1 or 2 output relays for acid or base dosage.
The models with electromechanical relay(s) have COM,
NO and NC contacts. The models with solid state relay(s)
have COM and NO contacts.
1 output relay for alarm condition (COM, NO and NC
contacts).
• RS485 isolated communication link (optional).
• Calibration and Setup procedures allowed only through
an unlock password.
