Hanna Instruments HI 9910 User Manual

Page 3

PRELIMINARY EXAMINATION

GENERAL DESCRIPTION

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.

Hanna's

wall-mounted pH and ORP controllers with proportional

control are designed to meet a variety of process control requirements.
The electrodes can be installed quickly and easily. Simply plug the
universal BNC connector into the socket and twist it into a secured
position. Accurate measurements are displayed on a large LCD.
The controllers come equipped with relays operating at a maximum of
2A (240V).
The Hanna 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.
The recorder output terminals are isolated from the controller circuitry
to avoid any interference and are user-switchable between 0 to 20
mA or 4 to 20 mA.
In order to avoid electrical noise and interference all models provide
for a ground probe (differential input).
These controllers are housed in a rugged, modular, fiber-reinforced
ABS housing.

This manual is related to the following products:

HI 9911 HI 9920