Справочник Пользователя для Hanna Instruments hi 9931

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it
carefully 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.

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.

GENERAL DESCRIPTION

Hanna's wall-mounted conductivity and TDS controllers with

proportional control are designed to meet a variety of process control
requirements, especially those in horticultural, hydroponics and
agricultral applications.
The controllers operate with the optional Hanna 4-ring probes to
provide a linear and repeatble 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 probes incorporate a tempertaure sensor and the contoller will
automatically compensate for the temperature effect. Accurate mea-
surements are displayed on a large LCD.
The controllers come equipped with relays operating at a maximum of
2A (240V).
The controllers incorporate a triple contact alarm system. When
activated, the alarm contacts will open or close, triggering the
mechanism of your choice, whether a buzzer, light or any other
electrical device.