Scale the electrical values of a device to the physical units of a sensor.

Open your Channel Specification and complete the following steps to apply scaling to your configured sensor.
  1. On the channel you want to scale, click the Configure gear ().
  2. In the Scaling section of the channel configuration dialog box, select the scaling type.
    Table 24. Options for Scaling Electrical Values to Physical Values
    Device Type Scale Type Description
    Analog input Linear Scale the electrical values (x) to the physical values (y) linearly using the equation below, where m is the Slope and b is the Offset.
    y = m x + b
    Sensitivity Scale the electrical values (x) to the physical values (y) linearly using the equation below, where m is the Sensitivity and b is the Offset.
    y = x m + b
    Dynamic Sensitivity Scale the electrical values (x) to the physical values (y) linearly using the equation below, where m is the Sensitivity
    y = x m
    Table Scale the electrical values to the physical values using multiple electrical values and their corresponding physical values. Table scaling uses the formula below to calculate the slope (gain) and the intercept to calculate the offset for each consecutive set of values.
    ( Physical Value b − Physical Value a ) ( Electrical Value b − Electrical Value a )
    Two Point Scale the electrical values to the physical values using the minimum and maximum expected electrical values and their corresponding physical values. Two-point scaling uses the formula below to calculate the slope (gain), and uses the intercept to calculate the offset.
    ( Physical Value 2 − Physical Value 1 ) ( Electrical Value 2 − Electrical Value 1 )

    Electrical values are set using an immediate averaging of the signal reading when the From Average button is clicked. The chosen data rate determines the number of samples averaged.

    Data Rate Sample(s) Averaged
    <1 Hz Most recently read sample
    1 Hz–10 Hz Two samples after button clicked
    >20 Hz 100 ms of samples after button clicked
    Strain Adjust the Gage Factor and Gage Type to specify sensitivity and strain gage configuration.
    Counter Angular Position Encoder Set the number of pulses per revolution and initial angle of the encoder. Initial Angle is the value the counter resets to when Restart All Counters is clicked during channel configuration.
    Linear Apply a linear scaling to the counter using slope. For Slope, scale your signal linearly by using the equation below, where m is the Slope and b is the Offset.
    y = m x + b
    Linear Position Encoder Set the distance per pulse and initial position of the encoder. Initial Position is the value the counter resets to when Restart All Counters is clicked during channel configuration.
    Pulse Counter Set the initial value of pulses. Initial Value is the value the counter resets to when Restart All Counters is clicked during channel configuration.
    Pulse Encoder Set the number of pulses per revolution of the encoder.
    Digital input Invert Line Invert the line in the channel. If applied, the line is at high logic when off and low logic when on.