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WAGO-I/O-SYSTEM 750
Commissioning 87
750-450 4 AI RTD
Manual
Version 1.2.0
•
Example using Resistance measurement 2 setting
The equation for calculating the scaled process value using the "Sensor type
Resistance measurement 2" setting in the standard format, with the
corresponding variables is:
((Unscaled process value × Gain multiplier) / 256) + Scaling offset =
scaled process value in Ohm
Example:
((100°Ohm × 384) / 256) + 15 = 165 Ohm
Refer to the table below for more sample calculations for the sensor type
Resistance measurement 2 in the standard format.
Table 69: Examples of Scaled Process Value, Standard Format, Resistance Measurement 2
Gain multiplier Scaling offset
in Ohm
Scaled process value in Ohm
at 100 Ohm*
at 155 Ohm*
at 300.2 Ohm*
256 (1**)
0
100 Ohm
155 Ohm
300.2 Ohm
256 (1**)
10
110 Ohm
165 Ohm
310.2 Ohm
384 (1.5**)
15
165 Ohm
247.5 Ohm
465.3 Ohm
512 (2**)
20
220 Ohm
330 Ohm
620.4 Ohm
640 (2.5**)
20
270 Ohm
407.5 Ohm
770.5 Ohm
*) unscaled process value
**) Multiplier (= gain multiplier/gain divisor)
Refer to the table below for more sample calculations for the sensor type
Resistance measurement 2 in the S5-FB250 format.
Table 70: Examples of Scaled Process Value, S5-FB250 Format, Resistance Measurement 2
Gain multiplier Scaling offset
in Ohm
Scaled process value in Ohm
at 100 Ohm*
at 155 Ohm*
at 300.2 Ohm*
256 (1**)
0
100 Ohm
155 Ohm
300.0 Ohm
256 (1**)
10
110 Ohm
165 Ohm
310.0 Ohm
384 (1.5**)
15
165 Ohm
247.5 Ohm
465.5 Ohm
512 (2**)
20
220 Ohm
330 Ohm
620.5 Ohm
640 (2.5**)
20
270 Ohm
407.5 Ohm
770.5 Ohm
*) unscaled process value
**) Multiplier (= gain multiplier/gain divisor)