Hanna Instruments HI 8711 User Manual

Page 3

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, immediately notify your dealer.
Each model is supplied with:

• Transparent Splash-proof Front Cover
• Mounting Brackets
• Instruction Manual

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

functions correctly. All defective items must be returned in the
original packing materials together with the supplied accessories.

HI 8510 and HI 8512 pH and ORP panel-mounted indicators, and

HI 8710, HI 8711 and HI 8720 pH and ORP controllers, are ideal for
process control monitoring in a wide range of industrial applications.
These instruments have been designed for easy and fast installation,
and are provided with membrane keypads on the front panel, large
display and autodiagnostic functions.
All connections are made through screw terminals on the rear panel.
Each model accepts either a direct input from a pH or ORP electrode or
from a transmitter through 4-20mA input. The instrument also
provides ±5V power output and input terminals for amplified
electrodes.
Moreover, you can choose the output configuration for connecting a
recorder or a PLC, between 0-20 or 4-20 mA.
Note: In order to avoid damages and erroneous readings:

• do never connect more than one electrode type (BNC, amplified

or input transmitter) to the instrument.

• do never use both the 0-20 mA and 4-20 mA recorder

outputs at the same time.

Other features include over time control function, selection of the dosing
direction (ACID, ALKALINE - HI 8710; OXID, REDUC - HI 8720) and the
possibility to set dosing action mode (OFF/AUTO/ON).

PRELIMINARY EXAMINATION

GENERAL DESCRIPTION

This manual is related to the following products:

HI 8720 HI 8720T