Beckhoff ELX3312, Руководство по эксплуатации

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Basic function principles
ELX3312 and ELX3314 45 Version: 1.3.0
Specification thermocouple type C
Temperature measurement thermo-
couple Type C
Used electrical measuring range ±75 mV
Measuring range, technically usable 0°C ≈ 0 mV … +2320°C ≈ 37.107 mV
Full scale value (FSV) +2320°C
Measuring range, recommended 0°C … +2000°C
PDO LSB 0.1/0.01°C/digit, depending on PDO setting
Note:
Internally, 16 bits are calculated on the measuring range end
value. Depending on the thermocouple set, there are value jumps
> 0.01°C at "Resolution 0.01°C"; Type C: app. 0.07°C
Uncertainty in the
recommended
measuring range,
with averaging @ 23°C
ambient temperature ± 3.4 K ≈ ± 0.15 %
FSV
@ 55°C
ambient temperature ± 4.2 K ≈ ± 0.18 %
FSV
Temperature coefficient
(change of measured value with change
of terminal ambient temperature) Since the value is strongly dependent on the sensor temperature,
as can be seen in the specification plot below, it can be derived
from the specification plot. For a better approximation, the
measurement uncertainty at T
amb
= 39°C is also shown as the
average value between 23°C and 55°C to illustrate the non-linear
relation.
Fig. 32: Measurement uncertainty for thermocouple type C