When you receive a new breathalyzer, you may need to enter the first calibration reference date in the management log. Workplace safety managers or equipment staff set the next calibration schedule right after delivery, and agencies may require a certificate for each device. If you use the payment date or the parcel receipt date directly as the calibration start date, the actual device history and the management schedule can drift apart.
Breathalyzer calibration is work that uses specialist equipment and procedures to check and adjust whether readings meet the reference. A new product can have a manufacturing date, a pre-shipment inspection date, an actual calibration date, a purchase date, and a receipt date, and each date plays a different role. As a principle, the calibration start date for a newly purchased device should be set not from the receipt date but after confirming the management standard stated in the documents for that serial number and in the applicable manual.
First decide what kind of date you are looking for
Start by distinguishing whether the date to enter in the management log is the day the actual calibration work was completed or the reference date for calculating the next management interval set by the manufacturer. The calibration date on a certificate may indicate when calibration was actually done, but the basis for calculating the next calibration due date may be set separately by the product manual or supply terms. So rather than calculating the next schedule straight from a single date on the certificate, you need to read what the document actually certifies.
The purchase date is for the contract and cost processing, and the receipt date is when the device was handed over. For a product shipped after being held in stock, the manufacturing, shipping, purchase, and receipt dates may all differ. This difference is not an anomaly. It arises because each business step is different. When setting the management reference date, it is safer not to lump the dates together but to keep each date with its own label.
Items to match first on the box and documents
On receipt, record the model name and serial number on the device itself, and check that the serial number on the enclosed documents refers to the same device. If you received several units at once, you must not apply one representative unit's documents to the other units. You also need to tell whether a document was issued for each device or is guidance covering the whole delivery batch.
| What to check | What to read | What to record in the management log |
|---|---|---|
| Device label | Model name and serial number | The number that identifies the device |
| Enclosed certificate or inspection data | Document type, device number, date prepared and calibration date | Document name and the relevant dates |
| User manual | Management conditions and applicable models for that model | Title or edition of the manual checked |
| Purchase and delivery documents | Whether a certificate or initial inspection data is included | Missing documents and the date you requested them |
It is best not to assume that "shipping inspection," "inspection," and "calibration certificate" mean the same thing. Each document may differ in what it checked and how it presents the results. If you also record whether the certificate was needed for submission to an agency or for internal equipment management, it becomes easier later to judge which documents are missing.
The reference date is set by the documents and the manual together
If the device's certificate shows an actual calibration date, and the manual or supplier states that the management interval is calculated from that date, that calibration date can be the starting point for schedule management. Conversely, if there is only shipping inspection data and no calibration date or basis for calculating the interval, do not write the purchase date down as an arbitrary calibration date. In this case, mark it as "calibration reference date being confirmed" to prevent an estimated date from being used as if it were confirmed information.
Even with the same model name, the applicable manual may differ. DATECH's official Downloads page posts materials that specify what they apply to, such as "The New AF-50 / AF-50AD Korean-language manual." So rather than taking an old manual you found online first, or another model's interval, you need to confirm that the document matches the model name, serial number, and purchase period of the device you own. You must not extend one model's management conditions into a standard for every other product.
If a manual gives both a time criterion and a test-count criterion, you can manage the schedule by whichever criterion comes first, regardless of which one is exceeded. However, use only the actual criteria and calculation method written in that model's documents. This article does not give a specific period or count for the same reason: you cannot set numbers while the conditions for each product are unconfirmed.
When there are no documents or the meaning of a date is unclear
Let us take a hypothetical case. An equipment staff member received 10 new breathalyzers, but the box contained only a delivery note and no certificate for each device. The staff member checked the serial numbers on the device labels and observed that some units showed only a manufacturing date. From this information alone, you cannot tell whether calibration actually took place, or when.
A possible action in this situation is to bundle the order number, model name, serial number of each device, and copies of the documents received, and ask the manufacturer or supplier for the shipping inspection data, calibration data, and applicable manual for those devices. When you ask, rather than simply asking "When was it calibrated?", it is better to state the purpose as well, such as "We want to confirm the reference date for calculating the next management schedule and the document that supports it." When you get an answer, keep the reply together with the device numbers.
The completion standard is not for the staff member to pick a date arbitrarily and write it down. It is complete when, for each device, the identification number and documents are linked, and the actual calibration date or the management reference date given by the manufacturer, along with the manual applied, can be confirmed in the management log. If you ultimately cannot obtain supporting documents, record that fact and the history of your requests, and then decide according to your operating standards whether to carry out a calibration procedure separately when it can be confirmed.
Manage the receipt date and the next schedule separately
One approach you can suggest is to enter at least the receipt date, the calibration date stated in the documents, and the next scheduled check date in separate columns of the management log. The receipt date shows when the device arrived on site, the calibration date shows the work history on paper, and the next scheduled date is the operating schedule calculated according to the manual. Separating the three dates lets you trace why the schedule was set, even if the person in charge changes.
Before deploying a new device on site, you can have a procedure to check that the serial numbers on the device and the documents match, that needed accessories such as mouthpieces are present, and that the manual is for that model. This does not mean users should adjust the sensor themselves or calibrate it with standard gas. Keeping receipt checks separate from professional calibration work is what keeps device history accurate.
In the end, the calibration start date for a newly purchased breathalyzer is not set by the purchase receipt alone. The starting point for management is a date obtained by confirming the actual date and the nature of the document in each device's certificate or shipping data, and linking it to the management conditions in that model's manual. If documents are lacking, the appropriate order is to request confirmation based on the serial number and then finalize the next schedule for each device as answers come in.
