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 laterUpdate 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 for a Ralston Gauge

      This article applies to: Field Gauge. All models equipped with a pressure sensor. FieldLab. All models. What you will need:  A PC running Windows.  FieldLab Desktop software version 1.24 or later installed on your PC. Download the latest version for ...
    • Create Custom Engineering Units

      Learn how to create custom engineering units on the FieldLab Desktop App and add them to your Tests. 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 ...
    • Create Custom Engineering Units

      Learn how to create custom engineering 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 ...
    • 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 Custom Data Fields to a Test

      Note: You may need to perform free updates to your FieldLab and FieldLab Desktop in order to use this feature. Available for FieldLab Desktop versions 1.10.0 and newer, and FieldLab Pressure Calibrator firmware v1.117 and newer.   Instructions for ...
    • Recent Articles

    • How to Place an Order Using the Ralston Instruments Distributor Portal

      Purpose: This article explains how Ralston Instruments distributors can efficiently place an order using the Ralston Instruments Distributor Portal. Note that this is only available to users who are employees of authorized Ralston Instruments ...
    • How to Request a Quote from Ralston Instruments

      Overview At Ralston Instruments, we aim to make the quote request process as streamlined as possible for both end users and distributors. This guide outlines the steps for each group to request a quote efficiently. For End Users End users are ...
    • Calibrate the pressure sensor on a Field Gauge and Process Meter

      Do-it-yourself instructions for calibrating a Ralston digital gauge with the free FieldLab Desktop software. At the end of this process, FieldLab Desktop will automatically make any necessary adjustments to bring your Ralston gauge to acceptable ...
    • How long do the keypads on the LC gauge last?

      The keypad buttons on the LC10, LC20 and LC30 gauges last typically 5-10 million cycles. This varies depending on the ambient temperature as well as the force with which the buttons are pushed.
    • How National Pipe Thread (NPT) works

      NPT (National Pipe Tapered) threads are a standard used in the U.S. for connecting pipes and fittings. They are designed with a taper meaning that as you screw the male thread into the female thread, the diameter decreases and the threads become ...