KROHNE H250 Reed MS14 EN - Manual (Page 2)

11/2012
MA H250-MS14-Ex-II2G-AD-R01-en 4000602001
Electrical connection
For the electrical connection, first unscrew the cover. Because the reed contact is potential-free, the
terminals are not labeled. The intrinsically safe equipment may only be connected to separated intrinsically
safe circuits.
Setting
The MS14 is fixed to the flowmeter with a special support and is adjustable over the full measuring
range.
The limit switch MS14 is a potential-free, bistable reed contact. It can be operated optionally as an
NO or NC contact. Unless specified otherwise, it is supplied by the factory as an NO contact.
 
Untighten support screw (1).
 
Set operating point.
 
Tighten support screw (1).
Contact function
Two contact functions are available for limit monitoring:
Closing, at decreasing flow: Arrow on reed cartridge points away from measuring cone.
Closing, at increasing flow: Arrow on reed cartridge points towards measuring cone.
The contact function can be changed by changing over the reed cartridge screwed into the
cartridge case: