By scaling the analog input signal, the signal – initially received in the form of a current signal in digits – is converted into a physical quantity with which the system can work:

Example

The incoming differential pressure for the channel is to be scaled. 400 digits corresponds to a pressure of 0 mbar and 2000 digits corresponds to 60 mbar. Enter the scaling for these values as follows:

Raw value	Physical value
Raw value X0: 400 Digits (4 mA)	Physical Y0: 0 mbar
Raw value X1: 2000 Digits (20 mA)	Physical Y1: 60 mbar

A linear dependency is derived from the values that are entered. It is calculated automatically by the system. For example, if the input signal returns a value of 1100 digits, the resulting physical value would be 26.25 mbar:

Formula for scaling:

(1100 - 400) / 1600 x 60 mbar = 26.25 mbar

1. In the Raw value X0 field, enter the lowest possible digit value of the input signal. In the Physical Y0 field, assign the corresponding physical value to the digit value.

   In the example shown here, these values are:

   Raw value X0 = 400 (= 4.00 mA)

   Physical Y0 = 0

2. In the Raw value X1 field, enter the highest possible digit value of the input signal. In the Physical Y1 field, assign the corresponding physical value to the digit value.

   Raw value X1 = 2000 (= 20.00 mA)

   Physical Y1 = 60