--- title: "Legal Metrology in Indonesia: Tera Explained | Citia" description: "Tera marks an instrument as valid for use, tera ulang repeats it, and calibration gives no legal status. See the law, Permendag 24/2024 and the process." url: https://citia-engineering.com/en/knowledge/legal-metrology-tera language: en updated: 2026-11-13 type: article site: Citia Engineering Indonesia --- # Legal metrology in Indonesia: verification (tera), re-verification and calibration Tera marks an instrument as valid for use, tera ulang repeats it periodically, and calibration gives no legal status. The rules and the process in Indonesia. | Field | Value | | --- | --- | | Topic | Legal metrology | | Author | Tim Engineering Citia | | Updated | 2026-11-13 | Key takeaways Tera is the testing and marking, by authorised legal-metrology officers, that shows a measuring, weighing or related instrument (UTTP) meets the requirements for use; tera ulang repeats it periodically, while calibration compares the instrument with a standard without giving it a legal status. The three words are often used as if they meant the same thing, and the difference matters at audits, in contracts and when a customer disputes a quantity. This guide explains each one, what the law says, how the process runs, and where calibration still earns its place. For a worked case, see how a weighbridge works . - Tera is the testing and marking, by authorised legal-metrology officers, that shows a measuring, weighing or related instrument (UTTP) is fit to be used; tera ulang repeats it periodically. - Calibration compares an instrument with a traceable standard and reports its error, but it gives no legal status and carries no tanda tera. - The basis is the Metrologi Legal Law (UU 2/1981); since October 2024 the rules for tera and tera ulang are in Permendag 24/2024, which replaced the 2018 regulations. - Tera and tera ulang are carried out by the Direktorat Metrologi, a UPT or the regional Unit Metrologi Legal (UML), so the practical first step is to ask your local UML. ## Tera, tera ulang and calibration side by side - Who does it: Authorised officers of the Direktorat Metrologi, UPT or UML | The same officers | A calibration laboratory, often accredited by KAN, or an in-house team with traceable standards - Legal basis: UU 2/1981, Permendag 24/2024 | UU 2/1981, Permendag 24/2024 | Quality and contract requirements, not a metrology law - When: Before an instrument is first used | Periodically, and after events such as repair or a broken seal | On your own schedule, after repair, or when a contract asks - Output: Tanda tera sah or batal, or a written statement bearing it | Tanda tera sah or batal, with a year code | A certificate with measured errors and uncertainty - Gives legal status: Yes | Yes | No ## Why a site cares An instrument without a valid mark is not only an audit finding; the law forbids using it where a quantity is decided. Pasal 25 of UU 2/1981 prohibits having or using, at a place of business, at a place of delivery or where charges are set by measure, an instrument with a void or damaged mark, without a valid mark, with a repair that was not re-approved, or with readings outside the permitted deviation. Pasal 27 adds that a measuring or indicating device attached to an instrument already tera'd turns it into one treated as not tera'd. When a project adds data collection or a display to a weighing or metering instrument, ask your UML first how it should be done. ## What the law says Indonesian legal metrology rests on a short law and a ministerial regulation that is renewed from time to time. UU 2/1981 on Metrologi Legal defines tera as marking with a valid or void tera mark after testing an instrument that has not yet been used, and tera ulang as the periodic marking of one that has already been tera'd. Pasal 12 leaves the list of instruments that must be tera'd and re-tera'd to a government regulation, and Pasal 13 lets the minister set how and how often the work is done. Permendag 24/2024, enacted on 4 October 2024, now carries those details. Its Pasal 4 puts the work with authorised officers of the Direktorat Metrologi, a UPT or the UML for the area. Pasal 5 lists events that call for re-verification, such as an expired mark, a damaged mark or broken seal wire, a repair that affects the readings, or readings that deviate from the technical requirements. The mark carries a year code. The regulation refers to an interval table in its annex, so read the current text or ask your UML for the interval of your instrument. ## How the rules developed - 1981: UU 2/1981 on Metrologi Legal. Sets the idea of tera and tera ulang and the power to regulate them. - 2018: Permendag 67, 68 and 125. Separate rules on which instruments need tera, how it is done, and the tera mark. - October 2024: Permendag 24/2024. One regulation on tera and tera ulang; it revokes the 2018 rules and the 2014 rule on metrology staff. - December 2024: Permendag 31/2024. Rules on legal metrology measurement standards, replacing Permendag 52/2019. ## Which instruments are in scope The law covers measuring, volume, weighing and related instruments, so the question is not whether a device is electronic but how it is used. In a fuel business, four kinds of device come up most often. Whether a given one is on the mandatory list, and under which rule, is set by the regulation's annex and by your UML, so confirm it before assuming. The regulation also has a separate provision for equipment in oil and gas operations, which you should read for your own case. - Weighbridges: Weighing instruments used for transactions. - Fuel flowmeters: Meters that measure delivered fuel. - Storage tanks: Tanks whose volume tables are used for quantity. - Tank trucks: Compartments used to measure delivered volume. ## Getting tera ulang done - Check the mark: Read the year code on the tera mark and look for a broken seal wire well before it expires. - Contact your UML: Ask the regional Unit Metrologi Legal how to book, which instruments are due and what fees apply. - Prepare the instrument: Clean it, give officers access, plan for the downtime and have a person who knows the system on site. - Testing and adjustment: Officers test the instrument; minor adjustment (menjustir) can bring it within requirement. - Mark and record: A valid mark goes on, or a void mark if it fails; file the record and set the next date. ## Where calibration still matters Calibration answers a different question from tera: how far is this instrument from a traceable reference, and has that changed. It supports your own control, the quality system and customer contracts. The Kimia Farma boiler flow-metering project, for example, included internal calibration of the flowmeters and calibration by a KAN-accredited laboratory, besides commissioning ( KF flowmeter ). For flowmeters used to deliver fuel, the international reference is OIML R 117-1, and operators usually add meter proving between verifications; see flowmeters for fuel and meter proving . Keep the tera calendar and the calibration calendar side by side, because one never replaces the other. ## Glossary A certificate is not a mark: A calibration certificate shows how accurate an instrument was on a given day. It does not carry a tanda tera and does not replace tera ulang for an instrument that falls under legal metrology. Keep the tera mark visible and the seals intact, and schedule the visit before the year code runs out. - UTTP: Short for alat ukur, takar, timbang, dan perlengkapannya: measuring, volume and weighing instruments and their accessories. - UML: Unit Metrologi Legal, a unit under a provincial or district government that carries out tera work. - UPT: Unit Pelaksana Teknis, a self-contained technical unit of the Ministry of Trade. - Tanda tera: The mark affixed to an instrument, or to a certificate, as proof of tera or tera ulang. - Tanda sah and tanda batal: The valid mark for an instrument that passes, and the void mark for one that fails. - Menjustir: Minor adjustment or repair so the instrument meets the tera requirement. - Traceability: The link from a reading to a national or international standard through documented comparisons. ## Frequently asked questions Q: What is the difference between tera, tera ulang and calibration? A: Tera and tera ulang are legal markings made by authorised officers after testing, while calibration is a comparison with a standard that gives no legal status. Tera applies before first use, tera ulang repeats it periodically, and calibration follows your own schedule. Q: Which instruments must be re-verified (tera ulang)? A: The instruments that must be tera'd and re-tera'd are those listed under the metrology regulations, and the current rule is Permendag 24/2024. In practice weighing instruments, fuel dispensers and volume meters used in transactions are the usual cases. Confirm your instrument with the regional UML. Q: Can a calibration certificate replace tera? A: No, a calibration certificate cannot replace tera, because it does not carry a tanda tera and is not issued by authorised legal-metrology officers. Use calibration for your own control and traceability, and tera or tera ulang for legal status. Q: Who performs tera ulang in the regions? A: Tera ulang is performed by authorised officers of the Direktorat Metrologi, a UPT, or the Unit Metrologi Legal (UML) of the provincial or district government. Which one serves you depends on your location, so start with the UML of your regency or city. Q: How long is a tanda tera valid? A: A tanda tera is valid for the interval set for that instrument type, and the mark shows a year code. The interval table sits in the regulation's annex, so check the current text or ask your UML, then set a reminder before the year code ends. Q: Does a fuel flowmeter need tera? A: A flowmeter that measures fuel delivered in a transaction is a measuring instrument in the legal sense and may fall under tera or tera ulang, depending on its type and use. Permendag 24/2024 has a separate provision for oil and gas equipment, so confirm the route with the Direktorat Metrologi or your UML. ## Sources and further reading 1. Undang-Undang Nomor 2 Tahun 1981 tentang Metrologi Legal, Pemerintah Republik Indonesia, 1981 (https://peraturan.go.id/files/uu2-1981.pdf) 2. Peraturan Menteri Perdagangan Nomor 24 Tahun 2024 tentang Kegiatan Tera dan Tera Ulang, JDIH Kementerian Perdagangan, 2024 (https://jdih.kemendag.go.id/peraturan/peraturan-menteri-perdagangan-nomor-24-tahun-2024-tentang-kegiatan-tera-dan-tera-ulang-alat-ukur-alat-timbang-dan-alat-perlengkapan-metrologi-legal-1) 3. Permendag 24/2024 (salinan peraturan.go.id), Direktorat Jenderal Peraturan Perundang-undangan, 2024 (https://peraturan.go.id/filespengundangan/permendag-no-24-tahun-2024.pdf) 4. Permendag 31/2024 tentang Standar Ukuran Metrologi Legal, Direktorat Jenderal Peraturan Perundang-undangan, 2024 (https://peraturan.go.id/filespengundangan/permendag-no-31-tahun-2024.pdf) 5. OIML R 117-1 (2019): Dynamic measuring systems for liquids other than water, International Organization of Legal Metrology (OIML), 2019 (https://www.oiml.org/en/files/pdf_r/r117-1-e19.pdf) 6. KF flowmeter, PT Citia Engineering Indonesia, 2023 (https://citia-engineering.com/en/projects/kf-flowmeter) 7. Cover photo by HelgeRieder, CC0, Wikimedia Commons (https://commons.wikimedia.org/wiki/File:French_weights_with_weight_stamp_(1).jpg) Unsure which of your instruments need tera?: Send siTia a list of the weighing and metering instruments at your site, and the engineering team will help you sort what to confirm with the UML. ## Contact - Company: PT Citia Engineering Indonesia - siTia - Virtual Assistance: [WhatsApp +62 813-2206-507](https://wa.me/628132206507). siTia answers questions about our products, projects and enquiries on WhatsApp. Replies are automated, and a person from the Citia team follows up. - Email: services@citiaengineering.com - Phone / WhatsApp (siTia): +62 813-2206-507 - Location: Bandung, Indonesia [Contact Citia](https://citia-engineering.com/en/contact.md) ## Structured data (JSON-LD) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://citia-engineering.com/#organization", "name": "Citia Engineering Indonesia", "legalName": "PT Citia Engineering Indonesia", "alternateName": "Citia", "url": "https://citia-engineering.com", "logo": { "@type": "ImageObject", "url": "https://citia-engineering.com/media/citia-logo.png", "width": 950, "height": 328 }, "description": "Citia is an engineering and system integration company in Bandung, Indonesia. 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