Hanna Instruments HI 8931, Инструкция по эксплуатации

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OPERATING INFORMATION
All parameters are set through the front panel keys and trimmers.
When any key is pressed, the corresponding LED lights up to indicate
that the function is active.
Make sure that the conductivity meter, transmitter and probe are cali-
brated before taking measurements (see pages 28, 32 and 36 for cali-
bration procedures).
SET POINT
To set the working point of the controller, press the SET key. The display
will indicate the current set value.
Use a small screwdriver to adjust the COARSE and FINE trimmers until
the desired value is displayed.
Above Setpoint Control Operation
Leave the "SET SELECT" connectors “HI” and
“L0” open. The set contacts relay will close if
the measured value is higher than the setpoint
value, and the "SET ON" LED will light up.