Hanna-instruments HI 943500A Manual do Utilizador descarregar pdf (Página 10)

1918

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.

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Hanna-instruments HI 943500A Manual do Utilizador Página 10