Contact function, Electrical connection, Setting – KROHNE H250 Reed MS14 EN User 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: