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. The FieldLab Desktop app on your Windows computer. Version 1.40.4 or later. Update FieldLab Desktop to the Latest Version.
  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


    • Related Articles

    • Create Custom Pressure Units

      Learn how to create custom pressure units on the FieldLab Desktop software and add them to your Ralston devices. 1. From the "FieldLab Desktop" menu, select "Preferences" 2. Select "Custom Units" 3. In the Custom Units dialog box, choose "New" for a ...

    • Create a custom Pressure Safety Valve / Pressure Relief Valve Test to run on a FieldLab

      Create a new valve test and add it to a FieldLab Pressure Calibrator to perform tests on pressure safety and pressure relief valves. This feature requires: FieldLab Desktop App version 1.24.0 or later installed on your PC. You can update from within ...

    • Add a Custom Unit to a Test

      1. Update or download & install the latest version of the FieldLab Desktop app on your Windows computer to Version 1.40.4 or later. Update FieldLab Desktop to the Latest Version. 2. Navigate to Tests Modes in FieldLab Desktop 3. Select an existing ...

    • Add a custom unit to a Field Gauge and Process Meter

      Add a custom unit to a Field Gauge and Process Meter 1 Power on the gauge and connect it to the computer running FieldLab Desktop with the provided USB cord. 2 On the Devices screen in FieldLab Desktop, select the Field Gauge or Process Meter you ...

    • Create calibration tests for pressure gauges

      Create custom Calibration Tests to test the accuracy of any analog or digital pressure device. Once created, you can run the custom test on your computer or on a FieldLab Pressure Calibrator. 1 Go to the Test Modes Library in FieldLab Desktop. 2 ...

    • Recent Articles

    • FieldLab Desktop doesn't recognize FieldLab when connected with a USB cable

      The FieldLab contains built-in safety circuitry that reduces the USB signal to intrinsically safe levels. Some newer PCs have USB port circuitry that further weakens the USB signal to a level below the required threshold for communication between the ...

    • Find the serial number and model for your gauge

      Located on the external casing of your Field Gauge All Field Gauge LC20 and Process Meter LC30 gauges are shipped with a custom sticker that contains the following information. Model Number. Model numbers ending in B1 or W1 indicate the gauge has a ...

    • Troubleshoot USB Power Noise Causing Pressure Reading Drift on a Ralston Gauge

      Problem Unexpected pressure reading changes on an Ralston LC gauge when connected via USB. Root Cause Electrical noise is introduced through a low-quality USB hub and power supply interference. Noise from switch-mode power supplies (SMPS) can travel ...

    • Adjust Damping on your Ralston Gauge

      Damping slows the visual updates of a pressure gauge’s reading. The goal is to minimize minor fluctuations of the pressure reading on the screen caused by subtle variations in pressure that may create unwanted visual noise. Ralston gauges are set to ...

    • Register your Ralston Gauge

      Register your Ralston gauge to access calibration certificates and install firmware updates. This article applies to: FieldLab, Field Gauge LC10, LC20, and Process Meter LC30, all models. Things you will need: A PC running Windows. FieldLab Desktop ...