KROHNE GA 24 EN - Manual (Page 15)

ELECTRICAL CONNECTIONS
4
15
GA24
www.krohne.com 02/2011 - 4001229901 MA GA24 R01 en
4.4 Limit switch function reversal
4.4.1 Limit switch function reversal MS14
The contact function can be changed by reconnecting the reed cartridge screwed into the
cartridge housing:
• Closing as flow increases:Arrow on reed cartridge points towards measuring glass.
• Closing as flow decreases:Arrow on reed cartridge points away from measuring glass.
4.4.2 Limit switch function reversal TG21
The contact function can be changed from normally open to normally closed by moving the
position of the slotted proximity switch 3.
Once the screw 6 has been undone, the slotted proximity switch 3 can be moved to the other
end position.
If there is the possibility of vibrations triggering an improper switching operation, the strength of
the force closure between the adjustment magnet and counter magnet 4 can be adjusted on the
immersion lug 2 using the grub screw 5.
The switching reproducibility is < 3% of the final measuring range value and is affected by the
strength of the force closure.
1 Magnet
2 Contact vane
3 Slot sensor
4 Counter-magnet
5 Grub screw
6 Detaching screw slot sensor
MA_GA24_R01_en_4001229901_PRT.book Page 15 Wednesday, February 2, 2011 8:57 AM