KROHNE SU 600 Ex EN - Manual (Page 18)

entered. The greater the difference between the two adjust-
ment points, the more precise the measurement. It does not
matter which value is entered first.
à
Select position [B] or [C] on the function switch, enter the
percentage values for the min. and max. adjustment and
save your settings.
Two operating relays are integrated inSU 600 Ex for level
detection. First of all, determine at which switching points the
relays should switch on and off again. Furthermore you have to
distinguish between the relay modes overfill and dry run
protection. You switch over by exchanging the ON/OFF values
of the relay.
l
Overfill protection: Relay is switched off when the max.
level is exceeded (safe currentless condition), relay is
switched on again when the level falls below the min. level
(switch on point < switch off point).
l
Dry run protection: Relay is switched off when the level
falls below the min. level (safe currentless condition), relay
is switched on again when the max. level is exceeded
(switch on point > switch off point).
à
To adjust the on and off switching points of relay 1, set the
function switch to position [1] or [2], enter the switching
points for ON or OFF and save your settings. If necessary,
proceed in the same way with relay 2 (position [3] or [4]).
Relay outputs
18 SU 600 Ex - 4 ... 20 mA signal conditioning
Setup with the integrated indicating and adjustment unit
30653
-EN
-050803