User's Manual

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

PRELIMINARY EXAMINATION

GENERAL DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

Remove the instrument from the packing material and examine it

carefully to make sure that no damage has occurred during ship-

ping. If there is any noticeable damage, notify your Dealer.

Note: Save all packing materials until you are sure that the

instrument functions correctly. Any defective item must be

returned in the original packaging together with the supplied

accessories.

IMPORTANT:

1. Read the instructions before using the instrument.

2. The instrument should be connected to a mains socket.

3. Never install the controller outdoors, in a wet or humid area or

under direct sun light. Nor install the controller where liquids

may be sprayed or poured on it.

4. The instrument’s main power line as well as the dosage and

alarm terminals are protected by separate 2A fuses. Use only 2A

fuses for replacement.

Hanna's wall-mounted conductivity/TDS and pH controllers

are

designed to meet a variety of process control requirements, especially

those in horticultural, hydroponics and agricultural applications on

the one hand and boilers and cooling towers on the other.

All controllers provide for two separate relays, one for pH and another

for Conductivity/TDS. HI 9913 and HI 9935 also come with propor-

tional control to save on use of chemicals and fertilizers.

All models operate with the optional Hanna 4-ring probes to provide

a linear and repeatable measurement. The conductivity/TDS probes

can be installed quickly and easily. Simply plug the DIN connector

into the socket and tighten the retainer ring.

The EC/TDS probes incorporate a temperature sensor and the control-

lers will automatically compensate for the temperature effect. Accurate

measurements are displayed on a large LCD.

Similarly, the pH electrode can be installed quickly and easily. Simply

plug the universal BNC connector into the socket and twist it into a

secured position. In order to avoid electrical noise and interference,

the pH circuitry also provides for a ground probe (differential input).