M&C TechGroup FA-1_2_3,bi Operator's manual - Manual (Page 16)

16
Gas sampling and conditioning technology 5-6.10-ME

Without feeding of gas, the floating particle  is placed on the float stopper  on the bottom of
the flow meter measuring glass.

In case of mono-stable function, the sensor is fixed to the meter tube in such a way that the
floating particle is placed on the lowest position (alarm point) and the light beam of the sensor
is blacked out. For adjusting the alarm level, the float stopper must be regulated.

In case of bi-stable function, the sensor is fixed to the meter tube in such a way that it marks
the necessary minimum flow rate (min. alarm) or the maximum admissible flow rate (max.
alarm).

Switch on the power supply for the electronic controller.

The red LED of the electronic controller or the pre-amplifier is beaming – alarm situation.

Move the floating particle  by feeding of gas into a position above the flow alarm sensor .

The green LED of the electronic controller or the pre-amplifier is beaming - O.K. situation.
The flow control unit is ready for work!
N O T E !
For bi-stable electronic controller:
If the floating particle  is situated above the flow alarm sensor  when
starting and before the power supply of the electronic controller FA-1.. is
switched, the red LED is beaming and signalises alarm (Safety-First-
switching). The same applies in case of a short-time voltage failure during
operation.
This alarm is cleared by cutting first and re-feeding of gas.
14.1 SENSITIVITY ADJUSTMENT FOR ELECTRONIC CONTROLLERS FA1.1 AND
FA1.4
The standard adjustment of the electronic controllers FA-1.. is made at works for the flow alarm sensor
(forked light barrier) FA-1bi and the measuring glasses of the flow meters FM-40 for 7-70Nl/h.
If the client composes a system with single components and if the alarm function is not given in case
of using other measuring glasses than ours, the adjustment of the forked light barriers FA-1/2/3bi can
be made as follows:

The forked light barrier must be mounted onto the flow meter glass.

The floating particle of the flow meter must not be inside the light beam of the forked light
barrier FA-1/2/3bi.

Concerning the wall mounting version FA-1.1 : Loosen the 4 screws and remove the lid. Press
the button S1 and search simultaneously the respective spot on the potentiometer P1 where
the LED indication changes from read to green or from green to red (turn clockwise in order to
change from red to green).

Concerning the rail mounting version FA-1.4 : Press the button Bal.-Control and search
simultaneously the respective spot on the potentiometer (Balance-adj.) where the LED
indication changes from red to green or from green to red.
14.2 SENSITIVITY ADJUSTMENT FOR USE OF PRE-AMPLIFIER K-FA..
When using a pre-amplifier K-FA.., the sensitivity adjustment is only to be made on the pre-amplifier
and not on the connected electronic controller FA-1.. .

For executing the sensitivity adjustment, loosen the 4 screws and remove the lid.