• Linear Input Parameters
    Input Unit
    Current Value
    Low Input Limit
    High Input Limit
    Square Root Output Parameters
    Output Unit
    Low Output Limit
    High Output Limit
    Output Reading

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    Input Unit (Linear Input)

    You can use any type of range between Low Input Limit (LRV)  and  High Input Limit (URV).

    Output (SqRt Output)

    You can use any type of range between Low Input Limit (LRV)  and  High Input Limit (URV).

    Formula

    SRR = ((LI - LLI)/(HLI - LLI))1/2 x (HSO - LSO) + LSO

    Symbols

    Example

    0-300 pascals dp to 0-12,000 cubic metres per hour flow conversion

    Let's say that, we have a differential pressure of 0 to 300 pascals which send to the transmitter (DP), and then the transmitter sends a square root extractor input to a DCS system which measures a flow rate of 0 - 12,000 m3/h. The figure below shows 10 points over the 0 to 300 Pa which should be compared with the actual flow being measured.

    Example 1

    SqRt extraction to convert inH20 pressure to mmscfd flow

    The example below shows the exact calculation when will be performed Square Root as a transfer function for flow measurement.
    Let's say that 0-100 mmscfd (million standard cubic feet per day) corresponds to the range of Flow Transmitter which is 0-100 inH2O (DP). When the DP reaches 50 inH2O, the flow will be 50 mmscf if the linear range is selected. In the case of the Square Root, the story is totally different, see the details below

    Using this formula the flow generated by 50 inH2O is:

    50 inH2O = 70.710625 mmscf

    Example 2

    4-20mA linear to 0-100% flow

    The example below shows how to convert mA to percentage square root extraction of flow measurement.
    Enter the into this calculator for a 4-20mA Input signal to square root percentage conversion. For more details see the Figure below

    Enter the following into this calculator for a 4-20mA signal to square root percentage conversion:

    Linear Input (4-20mA)

    Square Root Extraction Output (%)

    This is a 10 point scale showing the conversion values: