ProMinent DULCOMETER Compact - Hysteresis and Limit Values; Temperature Correction Variable

10.4 Hysteresis limit value
Measured value
Limit value
transgression
Upper
limit value
"Hysteresis"
t
t
"Hysteresis“
Lower
limit value
A0009_GB
Fig. 32: Hysteresis
Upper limit value = [LIMIT↑]
Lower limit value = [LIMIT↓]
The range between [LIMIT↑] and [LIMIT↓] is the valid measuring range.
The controller has a [hysteresis] , which is set as a % to the respective [LIMIT] value.
An error message is emitted if, for example,
[HYST] = 5 % and [LIMIT↑] is exceeded. If
the level falls below 0.95* [LIMIT↑] , the error message is retracted. If the level calls below
[LIMIT↓] , the error message is issued, which is retracted again after exceeding 1.05*
[LIMIT↓] .
10.5 Temperature correction
variable
Available temperature
A temperature reading for the conduc‐
tivity always has to be available,
either by a temperature measurement
or a manual temperature setpoint.
The correction variable compensates for
the effect of the temperature of the
medium on the measured value. The cor‐
rection variable is the temperature of the
medium to be measured.
Control parameters and functions
82