Calibration before first use is strongly encouraged for best results.
It is recommended to recalibrate after the Pill housing has been opened (to recharge via USB-C, for example), as tiny changes when opening/closing the housing can affect calibration.
IMPORTANT: The RAPT Pill is designed to disconnect from the RAPT Portal once the USB-C cable is unplugged to preserve battery life. Opening the Calibration or Diagnostics screen before disconnecting will keep the Pill Captive Portal active to allow calibration of the Pill. You will be prompted after 10 minutes to “Click Here To Maintain Connection” if the calibration process takes longer than 10 minutes.
Once you have entered a Calibration mode, please assemble your Pill according to the directions so that it can be removed from the USB and calibrated according to the instructions below
To enter Calibration mode
Plug your Rapt Pill into a charger or computer with a USB-C cable (not included) or place on the wireless charger (if the wireless charging kit is installed)
On your smart phone or tablet, open your WiFi settings and connect to the RAPT Pill XXXX access point using the password "kegland1". You may not need to enter the password if you have previously connected your device to the Pill WiFi
Once the RAPT Pill Access Portal is open on your phone or tablet, navigate to the Calibration tab
Select the desired calibration method (Standard, Advanced or Custom ) and follow the relevant steps
Calibration Options
Standard Calibration
RAPT Pill Hydrometer & Thermometer - Standard Calibration Guide
Standard calibration mode is recommended for most users.
Standard calibration is the quickest and simplest method of calibration.
Enter Calibration mode
Plug your Rapt Pill into a charger or computer with a USB-C cable (not included) or place on the wireless charger (if the wireless charging kit is installed)
On your smart phone or tablet, open your WiFi settings and connect to the RAPT Pill XXXX access point using the password "kegland1". You may not need to enter the password if you have previously connected your device to the Pill WiFi
Once the RAPT Pill Access Portal is open on your phone or tablet, navigate to the Calibration tab
Perform Standard Calibration
Fill a container of sufficient volume to hold the RAPT Pill in suspension with a liquid of known gravity. It is simplest and easiest to use water which has a gravity of 1.000
Place the Pill gently into the liquid. Ensure that it can float freely and is not touching the bottom of the vessel, as this will affect the angle
Select Standard Calibration in the Pill Captive Portal
Enter the known gravity of the liquid - typically 1.00 for water or sanitiser at the correct dilution
Wait for the angle reading to stabilise. The angle will never be completely steady, as it is extremely sensitive
Hit Calibrate and wait for Calibration to be completed
Advanced calibration mode is suited for higher gravity ferments.
Advanced calibration mode can give greater accuracy across a wider range. Advanced calibration is also quite quick and easy, and can provide a more accurate result than Standard Calibration.
It is the same procedure as standard calibration, but in addition to water at 1.000, you need a solution of a known gravity prepared. We recommend using a gravity in the range that your fermentation will start – 1.040-1.060 for typical beers, for example.
Enter Calibration mode
Plug your Rapt Pill into a charger or computer with a USB-C cable (not included) or place on the wireless charger (if the wireless charging kit is installed)
On your smart phone or tablet, open your WiFi settings and connect to the RAPT Pill XXXX access point using the password "kegland1". You may not need to enter the password if you have previously connected your device to the Pill WiFi
Once the RAPT Pill Access Portal is open on your phone or tablet, navigate to the Calibration tab
Perform Advanced Calibration
Fill a container of sufficient volume to hold the RAPT Pill in suspension with a liquid of known gravity. It is simplest and easiest to use water or sanitiser which has a gravity of 1.000
Fill another container capable of holding the Pill in suspension with a liquid of known gravity in the range representative of the upper limit of your starting gravity
Place the Pill gently into the weaker solution. Ensure that it can float freely and is not touching the bottom of the vessel, as this will affect the angle
Select Advanced Calibration in the Pill Captive Portal
Enter the known gravity of the liquid - typically 1.00 for water or sanitiser at the correct dilution
Wait for the angle reading to stabilise. The angle will never be completely steady, as it is extremely sensitive
Hit Calibrate and wait for the first calibration step to be completed
Place the Pill in the stronger solution. Enter the gravity as determined by a calibrated hydrometer. Once the angle reading has stabilised press Calibrate. Wait until the screen indicates that calibration is complete
Warning! Custom Calibration is for advanced users only.
Typically Advanced Calibration is accurate enough for all but the most extreme use cases.
This mode can provide the most accurate readings across a wider range than the other calibration modes.
Only proceed if you are comfortable with spreadsheets and complex curves. If you are working with solutions with gravities higher than 1.080, then custom calibration is advised.
For Custom calibration, you will need to take readings at various gravity points roughly 10 gravity points apart, and make a note of the angle of the Pill at each point. We recommend readings from 1.080 down to 1.000, 10 points apart (so, 1.080, 1.070, 1.060 etc). Note that it does not matter if the gravity readings are not exactly 10 points apart, as long as the gravity reading is correct. Use of a hydrometer that is known to be accurate is quite important.
To perform Custom Calibration, it is easiest to start with the strongest solution and dilute to progressively weaken the solution. It is important to use a calibrated hydrometer to ensure accurate gravity readings
Enter Calibration mode
Plug your Rapt Pill into a charger or computer with a USB-C cable (not included) or place on the wireless charger (if the wireless charging kit is installed)
On your smart phone or tablet, open your WiFi settings and connect to the RAPT Pill XXXX access point using the password "kegland1". You may not need to enter the password if you have previously connected your device to the Pill WiFi
Once the RAPT Pill Access Portal is open on your phone or tablet, navigate to the Calibration tab
Perform Custom Calibration
Place the Pill in the first solution of known gravity. Wait for the angle to stabilise, then make a note of the angle and the gravity
Repeat this step for solutions of different gravity, making a note of the angle and the gravity at each step. It is easiest to dilute the starting solution in steps of approximately 10 points. Finish with a reading in a solution with a gravity of 1.000 (IE water)
Once you have sufficient readings, the angle and the gravity need to be entered on an Excel spreadsheet (or similar such as Google Sheets) as a graph with gravity on the ‘y’ axis and angle on the ‘x’ axis. The more readings you take, the more accurate this calibration will be. We recommend a minimum of 6 samples, with 10 or more providing a greater degree of accuracy.
When you have created the graph, create a polynomial trend line onto the graph with the degree of the polynomial being at least one less than the number of data points. If the trend line creates an irregular curve (such as not passing through the data point at 1.000 correctly or not following a polynomial shape) reduce the number of data points (ensuring that there are still more data points than the degree of the polynomial) until the curve matches.
Custom Calibration - SAMPLE ONLY
This is a sample only
With 10 data points, a polynomial degree between 5 and 8 will typically give the best results.
Copy the equation of the trend line that is generated once this is done.
Paste this equation into the field provided on the Custom Calibration screen (In Google Sheets, set your label to Use Equation).
This will look similar to this:
y = 0.0000023109x5- 0.0005741632x4+ 0.0568746764x3- 2.8119846525x2+ 71.1087310405x + 265.6578215178 This is a sample only – DO NOT USE THIS EQUATION AS IT WILL NOT BE ACCURATE
Substitute x in this equation with “angle^” thus:
y = 0.0000023109angle^5- 0.0005741632angle^4+ 0.0568746764angle^3- 2.8119846525angle^2+ 71.1087310405angle + 265.6578215178
This is a sample only – DO NOT USE THIS EQUATION AS IT WILL NOT BE ACCURATE
Paste this equation into the field in your Custom Calibration to complete the calibration.
Congratulations! Your Pill is calibrated and ready to go.
