Create a Custom Pressure Unit with a User-Defined Curve Fit

Create a Custom Pressure Unit with a User-Defined Curve Fit

Things you will need:

  1. FieldLab Desktop App installed on your Windows PC. Download for free
  2. A Ralston FieldLab Digital Pressure Calibrator, Field Gauge, or Process Meter
  1. In the FieldLab Desktop App, go to FieldLab Desktop > Preferences.


  2. Select Custom Units.


  3. Select New.


  4. Under the Fit menu, select Curve Fit (nth degree polynomial).


  5. Enter your desired values.


  6. In the Custom Unit Name field, enter a name for your new unit.
  7. Select Save
  8. Add your new unit to a Ralston pressure gauge. Instructions for each device are below.
If you have a Field Gauge LC10, LC20 or Process Meter LC30:

      Add the custom unit directly to the device with FieldLab Desktop. Support article: Add or Remove pressure engineering units on a Field Gauge or Process Meter

If you have a FieldLab Digital Pressure Calibrator:
  1. Add the custom unit to an existing or new Test Mode in FieldLab Desktop. Support article: Add Custom Unit to a Test
  2. If the Test Mode you just saved is not installed on the FieldLab, add the Test Mode to the FieldLab. Support article: Add Test Modes to a FieldLab
  3. If the Test Mode you just saved is already installed on the FieldLab, you will need to sync the FieldLab so that the latest version of your test is installed. Support article: Sync Tests between FieldLab Desktop and your Ralston Gauges
  4. Activate the Test Mode with the new custom unit on your FieldLab. Support article: Change the Active Test Mode on a FieldLab


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