User Guide

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it care-

fully to make sure that no damage has occurred during shipping. 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.

• Read carefully the instructions before using the instrument.

• 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.

• The instrument has to be connected to a mains socket.

• The instrument’s mains power line is protected by a 400mA fuse. Use

only a 400mA fuse for replacement.

• The instrument’s dosage, water nozzle, feeding pump, circulation

pump and alarm terminals are protected by separate 2A fuses. Use

only 2A fuses for replacement.

GENERAL DESCRIPTION

HI 9914 Wall Mounted Fertigation Controller is designed to meet specific

process control requirements in agricultural, horticultural and hydropon-

ics applications.

The controller is provided with two measuring channels, one for pH and

one for Conductivity. The actual values of pH and Conductivity are

displayed separately on two large LCDs with backlight feature for a best

easy reading.

The EC probe is designed with a built-in temperature sensor which allows

the controller to automatically compensate for the temperature effect.

The matching pin prevents potential grounding problems and thus

ensure longer life to the pH electrode.

The controller includes two regulators for pH and Conductivity, each of

them can be adjusted from the front panel and the setpoint values will

be displayed.

The conductivity regulator adds fertilizer in order to increase the conduc-