The Norwegian Metrology Service offers measurement of weights in accuracy classes E2 and F2 with masses from 1 mg to 50 kg, and in other accuracy classes (M1, M2, M3 and unclassified) with masses from 1 mg to 3000 kg.
The National Laboratory at the Norwegian Metrology Service is responsible for carrying out weight calibrations. When weights are calibrated by us, formal requirements for traceability in measurements are met. These may be requirements set in connection with accreditations or certifications up to 500 kg.
The division into accuracy classes is taken from OIML R 111-1 Weights of classes E1, F1, F2, M1, M1-2, M2, M2-3 and M3. This recommendation contains a tolerance table that describes the maximum permissible error, ± deviation from nominal value, that the weights can have. The recommendation also provides many other useful information about weights.
Unclassified weights contain weights that are not classified or classified according to a standard other than OIML R 111-1. When calibrating unclassified weights, an evaluation of the condition of the weights is made in relation to the usefulness of calibration and the customers’ wishes. Justervesenet reserves the right to refuse calibration assignments for weights in poor condition and that are not considered suitable.
Justervesenet also performs mass determination of weights in cases where accredited calibration is not desirable or necessary. This can apply to both classified and unclassified weights, such as pound or pressure weights. Justervesenet can also perform mass determination of other objects with similar accuracy.
The table shows where in Norway you can have weights of different types calibrated.
Weights calibrated at Kjeller receive the CIPM MRA logo up to 500 kg.
Weight is the force a mass generates due to gravity. The unit of weight is the newton (N), but in everyday use we commonly use the unit of mass: kilogram (kg).
Mass is one of the seven fundamental physical quantities in the SI system. It is the property of matter that gives it inertia and weight. The unit of mass is the kilogram (kg).
All customers have the right to submit a complaint if they are dissatisfied with a calibration service from the Norwegian Metrology Service. Complaints may be submitted in writing or verbally, and are handled impartially and constructively.
Procedure:
Send written complaints to postmottak@justervesenet.no.
Yes. We offer calibration agreements for customers seeking predictability and efficiency. Through such an agreement, we plan calibrations in advance and schedule your equipment for fixed intervals. Delivery time and price are agreed in advance and stated in the order confirmation before work begins. For customers with several similar instruments, we can arrange batch calibration and provide discounts for efficient execution. Please contact us to discuss a customised agreement.
You can order calibration by contacting the Norwegian Metrology Service via email, telephone or our order form. We are happy to help you identify the correct service and provide practical information on how to send in your instrument.
The price depends on the type of instrument and the scope of the assignment. You can find indicative prices in the Norwegian Metrology Service’s price list.
After calibration, you will receive a calibration certificate documenting the measurement results, uncertainty and references used. The certificate also shows traceability to national or international standards and may be used for audits or quality assurance.
The calibration interval should be based on the required accuracy, frequency of use, and the consequences of potential measurement errors. Instruments used frequently, under demanding conditions, or for critical measurements should be calibrated more often than those used rarely or under stable conditions. For instruments used in commercial transactions, legal control intervals may be set by regulation. For other types of instruments, recommendations can be found in Norwegian Accreditation guidelines (e.g. NA-Dok 26a for scales) and international documents such as ILAC-G24.
We recommend assessing your specific needs and contacting us for advice on calibration intervals suited to your instruments and applications.
When you order a calibration, we first agree on the instrument type and the tests required. You then send the instrument to us, or we arrange on-site calibration if necessary. Our experts perform the calibration in accordance with international standards, and you receive a certificate showing the results, uncertainty and traceability. The instrument is then returned to you safely.
Phone:
64 84 84 84
E-mail:
postmottak@justervesenet.no
Contact form:
Fill in our contact form, and we will respond as quickly as possible.
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