And its free! For an example of a pump curve that was developed using Plot Digitizer that can also be use as a template for your own pump or fan curve, take a look at the sample and instructions I provided on the Plot Digitizer Pump Curve Example page. Pretty powerful and a lot faster than hand reading the points off of a chart or graph to get them into Excel. Programmed that relationship into the control system where we knew the fan speed via an input and wanted to estimate the power being consumed in real time.Used a curve fit from those data points to develop a mathematical relationship between fan speed and brake horsepower.Used the affinity laws to project the fan speeds and brake horse powers required to hold the flow steady as the filters loaded.Developed system curves for a number of operating conditions created by the filters loading in the constant volume system served by the fan.Increased expression of TIGIT was associated with poor prognosis. Results: Our literature search identified eight papers comprising 1426 patients with solid tumors. Once Dawn had done that, she sent the file to me and I: The Newcastle-Ottawa Scale (NOS) was used to evaluate the quality of the literature, and Stata 16.0 and Engauge Digitizer 4.1 software were used for data analysis. Or, you can extrapolate additional information from your data using Excel's trend line feature.įor example, I created the chart in the lower image by having our Office Admin use Plot Digitizer to capture a speed and brake horsepower line from the Greenheck curve in the upper image and load the raw data into Excel. Then, you can take things a step further by adding the system curve or curves for the system you are analyzing. You can do a similar thing for the brake horse power line or for different impeller sizes if you are working with a pump curve instead of a fan curve. Once it is in Excel, you can do calculations with it.įor instance, starting with a single rpm curve relating flow and static pressure for a specific fan speed, you can calculate all of the other rpm curves and plot them by using the affinity laws. That can be very powerful because not only does it allow you to take something and format to your liking for a presentation. In publications graphs often are included, but the actual data is missing. Engauge Digitizer - This digitizing software tool converts an image file showing a graph or map, into numbers. The result is a little Comma Separated Value (CSV) file that you can then load into Excel to recreate the curve. Engauge Digitizer Alternative - A lot of alternatives app to Engauge. Plot Digitizer is a share-ware Java application that allows you to load an image into its working window (upper image) and digitize it by first clicking on the end points of the X an Y axis and then clicking on the curve or curves you want to capture. But it is so darn handy that I had to include a link to it and a plug for it. Nor can I claim to have discovered it it was shared with me by my friends at Carbon Lighthouse. To be perfectly clear, Plot Digitizer is not a tool I developed.
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