When several GD3000 units are transferred to another department, writing only “three detectors” can leave it unclear which document belongs to which instrument. The model name identifies the product type, but does not distinguish individual instruments of the same model. A serial number identifies an individual unit; linking the serial number on a document to the instrument helps you find that unit’s history.
Calibration results are linked to the instrument checked at that time
Calibration is the work of establishing and recording the relationship between values provided by measurement standards and instrument indications under specified conditions. A calibration result is therefore a record for the individual instrument that was calibrated, not a value that applies to every unit of the model. The BIPM International Vocabulary of Metrology likewise defines calibration as establishing a relationship between measurement-standard values and instrument indications. BIPM International Vocabulary of Metrology 2.39
Suppose only one of three GD3000 units was calibrated. Although all three have the same model name, the result is linked only to the unit with the serial number shown on the certificate. It is not the result for the other two units. That is why you should check the serial number or other identification on the certificate and link it to the instrument. Even after a unit is moved to another department, retaining its individual identification lets you continue finding its related records.
Counting units and identifying each one are different kinds of control information
The quantity tells you whether the number of instruments being transferred is correct; the serial number identifies which individual unit each one is. If you simply hand over three instruments and three documents together, it can be unclear which document belongs to which unit. Comparing each serial number helps you find the instrument even if the document and instrument become separated. If a document has no serial number, it is safer to ask the issuer than to link it arbitrarily based only on date or model name.
If your workplace assigns a separate asset number, you can manage it alongside the serial number. The serial number identifies the individual instrument according to the manufacturer; an internal number may identify its location or responsible department in the workplace’s asset register. Their purposes differ, so they are not interchangeable. For example, if an internal list says `Asset 17` while the certificate gives only a serial number, keep a mapping that shows which instrument both numbers refer to so you can match the documents.
Even if the GD3000 manual describes a way to view records stored in the instrument, that does not mean it automatically links external certificates or department history to a serial number. Instrument records, calibration certificates, and repair histories have different content and are issued in different ways; review the subject and date of each document separately. Internal instrument records and external certificates or repair documents have different storage locations and authors, so one record cannot be assumed to link to another automatically.
Follow dates and types of work for each instrument
If several calibration documents have been issued for one unit, they may share a serial number but have different dates and results. To identify the latest document, consider its purpose and the work performed as well as its date. A repair report or functional check is not the same kind of result as a calibration certificate, so distinguish the work described in documents with different titles. The most recent date alone does not establish that every channel or function was checked.
Calibration establishes the relationship between measurement standards and instrument indications. Adjustment is a separate operation that changes an instrument so it gives a desired indication for a specified input; repair addresses a fault or damage. A procedure called `calibration` in a manufacturer’s manual may include adjustment as well as calibration, so confirm what was actually done on the model from the procedure and result documents. Do not infer that adjustment or repair was performed merely because a document is called a calibration certificate.
For example, one of several units may have been inspected while the result sheet lists only the workplace’s internal tracking number. Without a register linking that internal number to the instrument’s serial number, it may be difficult for someone else to identify the unit; confirm the target instrument from the issuer’s records. If documents for the same instrument were prepared on other dates, group them by date, type of work, and instrument identification so the history is not incorrectly combined.
For example, after a department transfer, the internal asset register may assign new numbers by department. If you preserve the mapping between the serial number and internal numbers, you can still find the previous history of the same unit. The serial number is an external identifier for an individual instrument, while the internal number is part of the workplace’s management system. Recording the link preserves continuity when documents are handed over. If only the internal number changes and previous records are not linked to the new number, one instrument’s history may be split into two.
Tell AI Safety Korea Co., Ltd. the model and the instrument identification shown on the documents, and we can help you match the records to the instrument.
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