JUMO 705020 mTRON T - Analog Input Module, 4-Ch. Operating Manual - Manual (Page 37)

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6 Configuration
Measuring range
In case of customer-specific linearization, these values can not be changed here. They are
identical to the settings made there for "Measuring range start" and "Measuring range end".
Scale
In case of customer-specific linearization, these values are initially identical to the settings
made there for "Measuring range start" and "Measuring range end". Here, the scale range can
be additionally restricted.
Offset type
To offset plant-specific deviations, the measured value can be offset for each analog input.
When doing this, the offset type is used to specify the type of measured value offset.
"Standardized" offset type: The measured value is offset after linearization. In the case of an
RTD temperature probe or thermocouple, the temperature value (°C or °F) determined by the
linearization is offset.
"Physical" offset type: The physical measured value is offset before linearization. In the case
of an RTD temperature probe, this relates to the resistance in ohms; in the case of a thermo-
couple, it relates to the thermoelectric voltage in mV.
A typical application scenario for the "physical" offset type is compensation of the lead wire re-
sistance in an RTD temperature probe in a 2-wire circuit.
Offset
A positive or negative form of the correction value is added to the measured value (entering a
negative correction value reduces the measured value).
Filter time constant
The filter time constant is used to adjust the digital input filter (2nd order filter). If the input signal
changes suddenly, approx. 26 % of the change is recorded following a period that corresponds
to the filter time constant (2 × filter time constants: approx. 59 %; 5 × filter time constants:
approx. 96 %). A large filter time constant means a high level of attenuation of interference sig-
nals, a slow reaction time of the actual value display, and low limit frequency (low-pass filter).