Operation - DeeEmm/DIY-Flow-Bench GitHub Wiki

Operation of the bench is relatively simple.

The WebUi shows the current status of the flow bench and provides the interface to control its operation. The webUI is split up into six main sections, the Dashboard, Flow graph, System Settings, Configuration, Pins and Mimic pages.

Dashboard

The dashboard shows the current sensor value readings which are displayed in 'tiles'.

  • Flow in cfm
  • Reference pressure in inches of water (in/h2o)
  • Pitot pressure differential (in/h2o)
  • Ambient temperature
  • Barometric pressure
  • Relative humidity

You can also toggle between the following views by clicking the display tiles

  • Flow at actual depression / flow at conversion depression
  • Reference Pressure / Differential Pressure
  • Swirl / Pitot
  • Flow Differential

The dashboard also contains controls to operate the bench

  • On - Vac motor output ON.
  • Off - Vac motor output OFF
  • Clear Alarm - Clears the currently displayed alarm

As well as controls to save and view data.

Lift data recording

To record a lift data point, click the 'Save Data' button on the Dashboard to show the lift capture dialog. Select the lift value that you are measuring and then click the 'Capture' button to save the current flow data.

The data is saved to the liftdata.json file in SPIFFS memory and also displayed on the lift graph.

NOTE: Lift point values are determined by the 'Valve Lift Interval' setting on the GUI config tab.

Flow Graph

Clicking on the 'Data Tab' displays the Flow Graph. This is a graphical representation of the Flow data stored in liftdata.json

Currently this data is very basic, but it gives you an opportunity to visualise the flow characteristics of the object you are measuring across a range of lift values.

Lift Data Export

To save the Lift Data to your local computer, click the 'Export' button. This will open a save dialog that will allow you to save the liftdata.json file to your local device.

The data is in JSON format which can easily be imported into Excel or other programs

You can also access the liftdata.json file via the 'Configuration > Files' dialog.

Image

To save an image of the lift data display clik on the 'Image' button. This will open a save dialog that will allow you to save the image file to your local device.

System Settings

The system settings govern system operation and determine how your flow bench operates. The Systems settings page also contains calibration data and can be access via the 'Settings' link in the navigation bar of the GUI. MOre details can be viewed on the Systems Settings page

Configuration

The hardware configuration page contains the hardware configuration settings for the flow bench. The flow bench configuration can be viewed and modified by visiting the hardware configuration page which can be accessed from the 'Hardware' link in the navigation bar of the GUI. More information on the Configuration Page

Pins

The pins page allows the user to view and edit the I/O configuration. More info can be found on the Pins page

Mimic

The mimic page shows the current system status to the user. This is especially useful if you want to view the settings whilst fault finding or performing tasks such as voltage or sensor calibration.