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PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
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 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 controller
with proportional
control is designed to meet a variety of process control requirements,
especially those in swimming pools and water conditioning.
HI 9912 provides for two separate relays, one for pH and another for
ORP. In order to save on chemicals and due to the slow reaction of
oxidants, the controller incorporates a Consent feature by which ORP
measurements are adjusted only after pH has been corrected. The
Consent feature makes the pH correction the master and the ORP
adjustment the salve for a better control.
The electrodes can be installed quickly and easily. Simply plug the
universal BNC connectors into the sockets and twist them into a
secured position. Accurate measurements are displayed on large
LCD’s.
In order to avoid electrical noise and interference, HI 9912 provides
for two ground probes (differential inputs.
The controllers come equipped with relays operating at a maximum of
2A (240V).
