76 Commissioning
750-458 8AI; TC; Adjust
Manual
Version 1.3.0
7.3
Calibrating Measured Values
All sensor types are calibrated via measurement channel 1!
Select the required sensor type to calibrate the entire sensor type group.
All sensor types are calibrated via measurement channel 1
Make sure that channel 1 is activated before you start the calibration.
User calibration serves to compensate for tolerances in electrical components.
The complete sensor type group is calibrated (see table “Sensor Type Groups”).
All sensor types of a sensor type group use the same calibration data, i.e., only
one sensor type is calibrated. All sensor types of this group automatically use
these values.
The following sensor type groups with associated sensor types are specified:
Table 40: Sensor Type
Groups
Sensor type group
ID Sensor type group contains the following
sensor types
+/−30
mV
4
Sensor Type S
5
Sensor Type R
6
Sensor Type B
7
Sensor Type T
8
Sensor Type C
9
±30 mV
+/−60
mV
0
Sensor Type E
1
Sensor Type N
2
Sensor Type J
3
Sensor Type K
10 ±60 mV
+/−120
mV
11 ±120 mV
+/−240
mV
12 ±240 mV
The variables in the following equations have the following meaning:
Table 41: Variable Legend – Calibrating Measured Values
Variable
Meaning/function
m
Calibration gain (gain factor)
b
Calibration offset (offset)
x1
Actual value 1 (analog input voltage)
x2
Actual value 2 (analog input voltage)
y1
Setpoint 1
y2
Setpoint 2
