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CHAPTER 4 FUNCTIONS
4
4.14 Sensor
Corr
ection F
unction
4.14
Sensor Correction Function
When a difference occurs between the temperature process value (PV) and the actual temperature due to reasons
such as a measuring condition, the difference can be corrected using this function. The following two types are
available.
such as a measuring condition, the difference can be corrected using this function. The following two types are
available.
• Normal sensor correction (one-point correction) function (
• Sensor two-point correction function (
(1) Normal sensor correction (one-point correction) function
This function corrects a temperature correction value, the proportion of the temperature difference to the fullscale
set input range.
Set a correction value to CH Sensor correction value setting (Un\G45, Un\G77, Un\G109, Un\G141).
set input range.
Set a correction value to CH Sensor correction value setting (Un\G45, Un\G77, Un\G109, Un\G141).
Ex.
When the temperature measurement range of input range is set to -200.0°C to 200.0°C with the actual
temperature being 60°C and the temperature process value (PV) being 58°C
temperature being 60°C and the temperature process value (PV) being 58°C
Based on the above formula, set 50 (0.50%) to CH Sensor correction value setting (Un\G45, Un\G77,
Un\G109, Un\G141).
Un\G109, Un\G141).
Common
(Actual temperature - Temperature process value (PV))
Sensor compensation value setting =
Full scale
=
400
2
= 0.5 (%)
100 ×
100 ×
After correction
Before correction
Input temperature
Temperature process value (PV)
2