Type FF-
5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
It might be necessary to adjust the position of the humidity sensor in strongly fluctuating ambient or component temperatures
in order to ensure the necessary tightness in the system.
5.1 Adjusting the sensitivity
NOTICE
If the moisture detector controller works in combination with a sample gas cooler, please
wait for at least 5 minutes until the cooler has reached its working temperature.
At the moisture detector controllers FF-HM 230 (24), FF-19 and ER-145/A/Ex sensitivity is reduced by turning the potentiometer
counter clockwise. Turn until the alarm turns off. (We recommend disabling the hold function during adjustment. Otherwise
the reset switch has to be pressed during the whole procedure).
At the FF-..-U the setting of sensitivity is quite the same. But first the enclosure must be opened. The potentiometer is on the up-
per right, next to the terminal block for the moisture detector.
The FF-3-U-2 has for the second moisture detector a Potentiometer on the upper left.
When switching on the power supply the alarm may happen to come on. This has to be taken into account for the design of the
whole system’s control. No other settings need to be done.
9
Bühler Technologies GmbH
BE410002 ◦ 09/2017
