If you keep a personal breathalyzer in the bag you take out, it is easier to find the testing steps again after a gathering or the next morning. But a prep card is not a shortened copy of the device manual. It should be a short guide that lets you see at a glance the actions you need in a hurry and your options for leaving the car behind.
Here, the breathalyzer is a personal device that checks alcohol levels through breath, and its result is not proof that settles whether you can drive but reference information for checking your own condition. So it is better not to put wording on the card saying you can drive after a certain amount of time, or judgments that a certain number is fine. The final action on the card is the principle that whatever the number, if you feel uneasy or hesitate, you leave the car and travel another way.
Narrowing the card's role makes it easier to use
The more a card in your bag tries to cover, from full instructions to storage and app settings, the harder it actually becomes to read. It only needs what to check after you take out the breathalyzer and what to do once you have decided not to drive. Content for managing the product's condition, such as cleaning, storage environment, and calibration, is better checked separately in maintenance materials and the user manual.
If you use DATECH's AF-40BT, the official product information lists a carrying pouch and a user manual as components. This product supports standalone use and smartphone app integration, and can store test results. But having these features does not mean every one of them must go on the card. On the first line of the card, always write the exact model name of the product you actually carry and where to find the user manual, so you do not mix in another model's procedure.
Put only before-and-after test actions on the front
Make the front of the card something you can use the moment you open it at the front door or at the venue. Because what "ready" means can differ by model, write that you will follow the preparation and test steps in the user manual rather than an arbitrary waiting time. The mouthpiece is the breathalyzer accessory you blow into, so if you carry one separately, first check that it is the right accessory for that product.
| Where it appears on the card | Example wording to keep | Why this item is needed |
|---|---|---|
| First line | Model name and where the user manual is | To avoid following another device's procedure by mistake. |
| Before testing | Check the preparation and test steps in the manual | Follow the product instructions instead of an arbitrary time or method. |
| After the result | Check the date, display unit, and whether the test finished | Keeps you from rushing a travel decision based on the number alone. |
| Last line | If in doubt, leave the car | Lets you act right away on a choice more conservative than the reading. |
The AF-40BT's display range is given in %BAC, ‰, and mg/L. On the card, it is more practical to note the unit shown on the device than to include a complicated conversion table. If you keep records in the app, do not save only the on-screen number; briefly adding what you actually chose to do, such as whether you went home without the car that day, helps when you look back at your habits later.
The back is your travel plan for "when I won't drive"
After seeing a test result, the information you most need may be how to get home rather than how to test again. On the back, write one or two options you can actually use at places where you often meet, such as public transportation, a designated driver service, or how to call a taxi. If there is someone to contact, use a note only you will recognize rather than a full name or detailed personal information, which reduces exposure if you lose the bag.
As a hypothetical example, say you took out the AF-40BT at a company dinner venue; the app connected, but it took a while to find a way home. What to observe is the breathalyzer's connection status and the transport available from where you are, not an expectation that the reading will drop quickly. A possible action here is to use the booking method on the back of the card to go home without the car, and the completion criterion is a state where your way of getting home is settled without you taking the wheel. If you still feel unwell or hesitant the next day, the same standard can apply.
App records are a habit log, not a driving permit
The AF-40BT supports Bluetooth smartphone integration and standalone use. If you decide to use the app, the card can simply note checking the connection before going out and how to find records. However, given the possibility of a low phone battery or connection problems, there is no need for a setup in which you cannot make a driving decision without the app screen.
It is more appropriate to use the records not to find "at what reading it is OK to drive," but to look back at whether you left the car on days when you drank. If you share records with family, decide first whom you share with and how much. Test results can contain details about your personal life, so there is no reason to write account information or detailed records on the card.
After going out, cross out unnecessary lines
You can judge whether the card was actually useful after you come back. For example, if the manual location was hard to find, keep that note, and cross out long explanations you never looked at. If the way you book a ride has changed or you have replaced your phone, update the back as well.
A finished card is not a list that makes you use the breathalyzer more often, but a tool that makes you pause during testing and choose a safe way to travel. If the model name, manual location, conservative principle after seeing the result, and your actual way home are written in easy-to-read text, you have all the items you need.
※ Self-check results from our products are provided as reference information only. Actual enforcement standards and test methods may differ by agency and equipment, so self-check results and enforcement results may differ, and the company accepts no responsibility for enforcement results.
