wtw TresCon UNO A111, Operating Manual

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TresCon UNO Operation
5 - 45 ba43134e08 05/2017
5.3.7 Relays as limiting value indicators
Function The characteristics of the limit value indicator are defined by the set-
tings,
Climit , hysteresis and td. The fundamentals of the function are
described in the introductory chapter (see section 5.3.3).
Settings
Setting Selection/Values Explanation
Climit within the measuring
range (depending on
the analyzer module) Upper or lower limi-
ting value.
Note:
Minimum distance
between the upper
and lower limiting
value in the case of
monitoring with 2
relays:
10% of the measuring
range
Hysteresis 0 ... 10 % of the
measuring range
Hysteresis for upper
or lower limiting value
td 0 ... 3600 s Switching delay:
The time period for
which a limiting value
must be exceeded
before the relay ope-
rates.
Prevents frequent
switching for measu-
red values that are
close to the limiting
value.
Action Normally closed
Normally open Relay action (see
section 5.3.1)
Response with stop Active
Passive In Stop mode, the
relay switches to the
selected condition.
Also in the case of
AutoCal , AutoClean
etc.
Hold The switching condi-
tion remains
unchanged.