tCheck 2 User Manual

Kevin Ward
Feb 18 · 11 min read

tCheck makes it easy to measure the potency of your infused oils and create recipes with exactly the strength that you need. With the addition of the flower & concentrate testing kit, you can also use tCheck to measure the potency of your plant material & concentrates.

tCheck’s patented technology measures infusions in:

  • Ghee / Clarified Butter

Oils such as coconut oil and butter must be warmed to a clear liquid state¹ before measurements can be performed.

WARNING: Certain types of essential oils, hand lotions, and solvents can melt or damage the tray. It is a special type of plastic and specially calibrated to your device. Please only test with clean hands, and do not add other materials to the testing tray besides herb infused oils, butters or alcohol. Hand washing with a soft sponge and non abrasive cleanser is the safest way to take care of your tray. Do not place in the dishwasher. Do not place the tray on a hot surface, or in the microwave. Excessive heat can cloud the tray or damage the surface. Boiling liquids may damage the tray. Drying with a cloth washed with a fabric softener can damage the tray.

When measuring butter, please be sure to only use the clear butter fats. Milk solids will throw off the measurements.

Mobile App

tCheck requires Bluetooth Low Energy (BLE) connectivity to a mobile device in order to function. Apps are available for both iOS and Android. Please download the apps from the respective apps stores.

Android: Click Here
Click Here

How to pair the device to your phone:

  1. Ensure that Bluetooth is enabled on your phone.
    Note: Make sure to enable location services for the tCheck app by clicking ‘OK’ when prompted. You can find directions on how to do so for iOS devices here and Android devices here.

How to run a test

Ensure the sample tray is not inserted into device when powering on — if it is, remove it. tCheck performs power-on self diagnostics and a tray may interfere with these self checks.

Now that your device is paired to your phone, make sure tCheck is on a flat level surface. If your device isn’t paired — see How to pair the device to your phone for more information.

  1. At the What is the temperature of your infustion? screen change the temperature of your base infusion material and unselect the checkbox if your infusion has NOT been decarbed. If your material has been decarbed keep the box checked. Click Next.

Improperly filled tray ❌

Avoid plant matter and bubbles in the pool

Properly filled tray ✅

If you are experiencing issues with excess bubbles try reseating the top tray by lifting it slightly from the logo end and placing it back down, or adding a couple more drops of the sample material.
Ensure that the excess oil stays within the overflow area and does not flow out of the tray.

Cleaning the tray

When the test is complete, remove tray and hand wash with liquid dish soap and warm water. Only use the soft side of a sponge. Abrasive cleansers or scouring pad will damage the tray. Do not clean the tray in the dishwasher. Do not use any cloth with fabric softener added. (See Taking care of your tray for more information)

Interpreting your results

After the test is complete, your results will be displayed in mg/ml — milligrams of cannabinoids per milliliter of oil. CBV means “Cannabinoids by Volume” which represents the total amount of cannabinoid molecular content per volume of liquid. This display may be changed to show other units such as mg/tsp or mg/tbsp.

An analogy would be dissolved sugar in a cup of water. If someone gives you a cup of sweetened water, CBV is a measure of the amount of granulated sugar that was dissolved in that cup of water. For example, 1 tbsp of sugar into 1 cup of water. (Note: tCheck does not measure sugar)

You can now take your test results and use them in the CBV Calculator to adjust your recipe accordingly.

If you get OVER measurement (Dilution):

Any result that displayed as OVER means infused potency is stronger than tCheck is able to measure. Due to the physics that tCheck uses to make measurements, there are certain limits to what it can measure. This is like using a ruler to measure the length of a dinner table. With a bit of care, it can be done with a reasonable degree of accuracy.

The procedure is:

  1. Measure out a precise volume of your infusion (For example .5ml)

Turning off your device

tCheck automatically powers down after 3 minutes of inactivity so there is no need to press the power button to manually power down the device. To re-awaken the device, simply press the front power button. With normal use, a set of AAA batteries should last over 4 months, running several hundred measurements.

Taking care of your device

  • Do not immerse or submerge tCheck device.

Taking care of your tray

Important! Follow the guidelines below for proper tray care. Even minor damage to your tray can lead to incorrect results. In the event that a new tray is required, you will need to return your device for recalibration with a new tray. If this happened please Contact Us.

  • Your tCheck 2 tray, if properly cared for, should last the life of the device (roughly 1,000 tests).


Use only alkaline, lithium, or NiMh batteries. Do not use NiCd batteries as they do not provide sufficient voltage to ensure reliable operation.

Firmware Updates

Periodically, you may receive an email message notifying you that a new firmware version is available. The firmware update process may take up to 90 seconds. Fresh batteries are recommended prior to updating the firmware.

Technical Specifications

Operating temperature: 60℉ ~ 100℉ (15℃ ~ 38℃)

Measurement Range


Each individual tCheck device is calibrated at the factory using industry calibrated spectrometer standards. As with lab and industrial grade spectrometers, tCheck’s accuracy is +/- 10% of full scale. Repeatability of measurements is also within +/- 15%. Because temperature plays an important role in the accuracy of the measurement, all calibration testing is performed with the device and analyte temperatures at 75°F (24°C). Butter is calibrated at 95°F (35°C).

During the measurement step, the app will ask that you remove the tray to ‘zero’ the scale. This step is critical for ensuring an accurate measurement. Additionally, it is important that you properly input the temperature of your infusion as this can have a significant impact on your measurement.

LED Colors — what do they mean?


  • Can’t Log in? Choose an email and leave the password field blank. This will allow a prompt to come up where you can reset your password by having a link emailed to you. We do not store passwords, nor can we send this link.
  1. the device could be too close to other electronics. Try moving to another area.

Note: If you get this message, please Contact Us and provide the MAC Address of your device (found under Settings > About)

  • Can’t connect to a device? Try turning your device off, and disabling your Bluetooth. Turn the device back on, go back into the app, and try to Run Test. This will allow the app to turn your Bluetooth on for you. Only use the in-app settings to connect to the device, not your phone settings (see How to pair the device to your phone for more information).


  • Burn hazard — infused oils may be hot. Handle with care.

RF Exposure Compliance

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

To comply with FCC/IC RF exposure compliance requirements, a separation distance of at least 20cm (8 inches) must be maintained between the antenna of this device and all persons.

Important Safety Instructions

Engineered Medical Technologies reminds you that when using tCheck or any electric appliance there are safety precautions that you should always follow.

  1. Read all instructions before operating the appliance.

How to Heat Your Samples

Samples should be heated on a heating pad or stovetop (NOTE: do not heat the tCheck tray itself). Do not heat any testing material using a microwave, as microwaving can breakdown certain chemical compounds that will affect the reading.


tCheck is an infusion potency tester used to collect live readings of your sample in minutes for commercial or personal use.

Kevin Ward

Written by

UX Director at Engineered Medical Technologies



tCheck is an infusion potency tester used to collect live readings of your sample in minutes for commercial or personal use.