User Guide

4
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/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 provided
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.
• Calibration: for pH 502 Series in 1, 2 or 3 points with
buffers 4.01, 7.01 and 10.01 pH (25 °C); for mV 602