Model Name Plato: Valid for SRD
1. What it does do?
Determines concentration of dissolved solids in a brewery wort from line density and temperature.
Breweries / Beverage
3.1. Input Water density at T2 (20°C – Plato). Needed for Specific Gravity @20°C calculation. Compensated density with Temperature T1 is calculated with the values measured with SMET.
3.2. Measure process line density and line temperatures. Values are taken from SMET-SRD.
3.3. Convert the line density of process fluid to temperature compensated for density value at T1 (20°C –Plato) – By using a dataset table from a known product.
4. How to load models into the SMET?
The following steps are to load the models into SMET:
- In the Dropdown list “Select Measurement to Apply Model” select. That will modify the “Select Model from List” dropdown menu values. Select Measurement application (Concentration)
- In “Select Model from the list” select the model you would like to use for the specific parameter. When you select the model, you will get more information about the specific equation used and the coefficients you will need to apply that model. Select “Plato”
- “Load Dataset” button, this operation is crucial to get the correct measurement for Plato degree so as density and temperature to be the measurement from the process must be within this table. Dataset table must cover at least the following instances:
- Five reference temperatures (at least)
- The density for each of four product types at the five reference temperatures from Process (20 reference points in all, at least)
- The base temperature(20°C), must be one of the five reference temperatures.
- Guarantee inline density value is between the density values from the table otherwise output from SMET will be NaN.
5. Matrix Referral
5.1. Dataset for 20 dataset point, first column is for temperature. The rest of the columns should be each for a product "P", and the densities of that product at the different temperatures.
5.2. Import: Select dataset from an .csv sheet
Figure 3. Selecting dataset
5.3. Export: Export current table to .csv
5.4. "Tk1, Tk2" button to create the coefficients that will be used on the model.
5.5. Calculated Tk coefficients by internal model.
5.6. "Load Tks & Close" button to load these coefficients into the model
6. Uploading the Mathematical Model
Click “Upload Model” to load the model settings into SMET. The button should turn GREEN for a couple of seconds if the action was successful or turn RED if the operation was Rheonics Control Panel Software unsuccessful. This action will refresh the values for the Uncompensated and Compensated indicators. Here you can verify if the model is calculating the expected values. If not, you can correct and repeat the process.