Hanna Instruments HI 943500A - Manual (Page 10)

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TERMINAL BOARD CONNECTIONS FOR H8936
• Remove the 4 screws and the top cover of the HI 8936 conductivity
transmitter to obtain access to the terminal board connections.
• HI 8936 used in conjunction with HI 8931 controller
Use a PVC insulated 4-core cable to connect the transmitter to the
HI 8931 conductivity controller (see also page 25).
• Set Select
These contacts permit the activation
of a Set Contact relay when the
measured value is lower (connected
terminals) or higher (open termi-
nals) than the user's set value. See
also page 28.
• +4-20 mA
These are the output terminals for connection to a recorder or other
control equipment.
The output current varies from 4 to 20 mA and is proportional to
the measured conductivity value.
• Alarm Contacts
During normal operation these termi-
nals remain closed.
If the measured conductivity level is
not within the tolerance of the set
value, the alarm contact is open.
These contacts act only as a switch.
See also page 29.