The National Laboratory for pressure and vacuum performs calibration of pressure balances. This is the most accurate and complex calibration performed and is done according to current standards and guides.

The national laboratories are responsible for maintaining the national reference standards for each measurement quantity and  spreading metrological competens and traceability to industry and society at large. The national reference standards are the highest level of traceability in Sweden. 

A calibration performed at a national laboratory fullfils all typical traceability and accreditation requirements that commonly exist in industry and society at large. 

The pressure balance to be calibrated is connected to the National Labratory's reference pressure balance. The calibration takes place at six to eight pressure points over the balance pressure range. At each level, the balances are balanced against each other, whereby a reference pressure is obtained and used for calculation of results.

There are two methods used in pressure balance calibration. The first method gives a result in form of correction terms at certain pressure levels as well as associated measurement uncertainties. According to this method, the weights of the object does not need to be calibrated before the pressure balance calibration but certiain weight compositions are used to set a nominal pressure. This means that the calibration results only covers the specifik calibrated pressure levels.

The second method involves weighing the weights and piston / cylinder combination at the National Laboratory for mass. The result from that calibration is then used to calculate the effective area of ​​the piston / cylinder combination by means of the reference pressure. This means that the pressure balance is calibrated so that the customer receives sufficient information to be able to measure pressure over the entire pressure balance interval, not just the pressure levels covered in the calibration certificate.

Results are reported in a digital calibration certificate in Swedish or English. The result is presented as correction terms with associated measurement uncertainties or as effective area with measurement uncertainties, depending on the method used for the calibration. The certificate also contains information that the calibration was performed at a National Laboratory.

All pressure balances to be calibrated must be cleaned before delivery to the national measurement site.

The pressure and vacuum National Laboratory performs calibrations of all types of vacuum gauges. Calibration at the National Laboratory always guarantees the highest possible traceability in the measurements performed.

The national laboratories are responsible for maintaining the national reference standards for each measurement quantity and  spreading metrological competens and traceability to industry and society at large. The national reference standards are the highest level of traceability in Sweden. 

A calibration performed at a national laboratory fullfils all typical traceability and accreditation requirements that commonly exist in industry and society at large.

The vacuum gauge is connected to the national Laboratory's standards and the calibration is performed at agreed upon pressure levels. Calibration of vacuum meters always takes place at increasing pressures. The National Laboratory performs calibrations of vacuum gauges from 5·10^-6 Pa and upward.

Since the National Laboratory is the highest calibration body in Sweden, calibrations are performed here with the highest possible traceability.

The pressure media used for calibration of vacuum gauges at the National Laboratory site is nitrogen gas.

The calibration results are reported in a digital calibration certificate in Swedish or English which states that the calibration was performed at a national laboratory.

All objects handled by the national measurement site for pressure and vacuum have purity requirements. All items calibrated must be cleaned prior to arrival.

The National Laboratory for Volume and Flow offers calibration of different types of flowmeters.

The national laboratories are responsible for maintaining the national reference standards for each measurement quantity and spreading metrological competence and traceability to industry and society at large. The national reference standards are the highest level of traceability in Sweden.

A calibration performed at a national laboratory fullfils all typical traceability and accreditation requirements that commonly exist in industry and society at large. 

Each type of meter requires its own calibration method and equipment. The National Laboratory för Volume and Flow has about ten measurement equipments to be able to calibrate different types of flowmeters.

Calibration of the entire signal chain

When calibrating it is impotant that the output signal (for example the pulse, the flow or the current display device) that are used normally, also is the one that is being calibrated. Output signals can go through separate amplifiers or converters and they can have different time constants and different zero suppression. Because of that, it is very important that the whole signal chain is calibrated. By calibrating, the error of the flowmeter's display can be determined.

Different flowmeters requires different calibration methods

Each type of meter requires its own calibration method and equipment. Questions regarding the choice of method and equipment include the following:

• type of meter (resolution, type of output signal, integration time, etc.)
• type of liquid (density, viscosity, aggressiveness, temperature, pressure, etc)
• mode of use (continuous operation, dosing volume, installation, etc.)
• accuracy (which measurement uncertainty to be accepted)

We have about ten measurement equipments to be able to calibrate differnet types of flowmeters

To be able to meet different requirements of calibration, we have calibration resources in the form of about ten different types of measuring equipment, several of which are fully or partly self-developed. As a national laboratory, RISE is responsible for the national standards, which means that our measurements are directly traceable to these standards.

Measuring range overview

Liquid                             Min-Max. flow rate (m³/h)              Temp. (⁰C)

Water                                                    0,03-720                                  20... 90

Water                                                    0,006-24                                  10... 90

Exxsol D40 ("Gasoline")              0,00006-150                          ca 20

Exxsol D120 ("Diesel")               0,0006-300                            ca 20

Motor-/hydraulic oil                     0,03-25                                      20... 60

Oil, spirit, glycol etc.                     0,0006-1,2                             ca 20   

Note that the values in the table are approximate.

The calibration results are reported in a digital calibration certificate in Swedish or English which states that the calibration was performed at a national laboratory.

The National Laboratory for pressure and vacuum performs gauge and absolute mode calibrations on all types of pressure transducers. Calibration at the national measurement site always guarantees the highest possible traceability in the measurements performed.

The national laboratories are responsible for maintaining the national reference standards for each measurement quantity and  spreading metrological competens and traceability to industry and society at large. The national reference standards are the highest level of traceability in Sweden. 

A calibration performed at a national laboratory fullfils all typical traceability and accreditation requirements that commonly exist in industry and society at large. 

The calibration object is connected to the National Laboratory's reference standards and the calibration is carried out in pressure points evenly distributed over the pressure range. The upper range for calibrations is 500 MPa.

Since the National Laboratory is the highest calibration body in Sweden, calibrations are performed here with the highest possible traceability.

The pressure media used at the National Laboratory are nitrogen gas, air, oil and water.

The calibration results are reported in a digital calibration certificate in Swedish or English which states that the calibration was performed at a national laboratory.

All objects handled by the National Laboratory for pressure and vacuum have a purity requirement. All items calibrated must be cleaned before shipment.

RISE manages the control system for electricity meters (ELSA), i.e. cluster sampling tests and reporting of faulty electricity meters, on behalf of Energiföretagen Sverige, the industry organization for Sweden's electricity grid companies.

ELSA is part of the service that Energiföretagen Sverige offers within the framework of the Swedish National Cluster Sampling of Electricity Meters. With the ELSA system, you can register and follow up the quality assurance of household electricity meters

Virtually all household electricity meters in Sweden are registered in ELSA. The information about the electricity meters in the database is used to select a number of electricity meters for control in a nationwide random survey. The selected meters are checked by control bodies approved by Swedac. The results of the surveys are used to approve batches of electricity meters for six years at a time, which can then be used by customers until a cluster sampling shows that the authorities' requirements for function and measurement accuracy are no longer met.

More information on the Swedish National Cluster Sampling of Electricity Meters, timetables, instructions and plans for future cluster samplings can be found at Energiföretagen Sverige.

To ELSA

Log in to ELSA via this page.

The results of each year's cluster sampling are announced by Energiföretagen Sverige at the end of the year. The results are available both in ELSA and on the website of Energiföretagen Sverige.

Please contact Energiföretagen Sverige if your grid company would like to start participating in the Swedish National Cluster Sampling of Electricity Meters.

To participate, you need to export your company's register of energy meters to a file and upload it to ELSA.

STAFS 2022:9 - Styrelsen för ackreditering och teknisk kontrolls föreskrifter om mätsystem för mätning av överförd el

Tests for fire detection systems intended for engine compartment according to SP Method 5320.

The test method described in this document is intended to test and rate the detection performance of fire detection systems installed in engine compartments. The test method also examines the durability of the system components.

To ensure early detection of fire and durability of detection systems, there is a need for fire detectors intended for engine compartments to be tested. Many of the challenges in this environment, are namely not specifically tested for in other standards for fire detection systems. These challenges are, for example, complex geometries cluttered with obstructions, high airflows, high temperatures and hot surfaces, dirt and dust, as well as vibrations, shocks and corrosion. SP Method 5320, considers these challenges, allowing for rapid performance evaluation under realistic and repeatable conditions.

The test method is divided over a number of different categories. Firstly, the complete system is test in a mock-up engine compartment as follows:

• The System Coverage Test evaluates the response time of fire detectors for both small and large fires under varying ventilation conditions. In total 13 different fire scenarios are considered to ensure the detection system has the ability to detect fires starting in practically every possible location in the engine compartment.
• The Response Time Test gives information on and compares the response times of detection systems in two fire scenarios; a slow-growing fire and an instant large flaming fire. This ensures that detection systems are equipped with components that allow for detecting both of these very different fire scenarios.

To secure the surviveability of the fire detection system and its components they are also subjected to component tests. These tests consider their durability to corrosion, ageing, temperature variations, vibrations, schock, EMC as well as ingress of dust and water. Before and after these tests, individual components are also subjected to the following test cases:

• The activation temperature and response time of heat detectors is analysed in the Heat Detection Test. This is done before and after component levels tests, to ensure that these do not affect their function in a negative way. In addition to this, the sensitivity of heat detectors to false alarms is tested.
• Flame detectors are tested in the Flame Detection Test to ensure their sensitivity was not affect by the components tests. Flame detectors are also subjected to field of view tests to guarantee detection ability is preserved for the complete field of view.
• The sensitivity of smoke or as detectors is investigated in a smoke tunnel during the Smoke/Gas Detection Test. Time to activation and obscuration at activation is compared before and after component testing.

After testing, a test report is delivered with the results which may be the basis for product approval (P-mark) according to SPCR 197.

SP Method 5320

Tests for fire suppression systems intended for engine compartments according to SP Method 4912, UNECE R107, AIS 135

This method assesses the fire suppression performance of fire suppression systems under mock-up operational conditions. For this purpose, several different types of fires are ignited and stabilised inside an enclosure with engine compartment characteristics. Fire suppression systems are then evaluated based on its ability to extinguish the various test fires.

SP Method 4912 tests fire suppression systems intended for engine compartments in a well-defined and objective way. Systems are subjected to realistic fire scenarios that can occur on and around a vehicle or machine, as a means to evaluate their performance. The system tests are based on the geometry, obstructions and air flow typically found in engine compartments. This allows for rapid performance evaluation under reproducible and repeatable conditions.

The fire suppression system may be subjected to the test scenarios listed below. In the end, a system will achieve a ranking based on the number of tests completed and the conditions, e.g. ventilation rates and/or level of openness of the testing rig, under which this was achieved. 

• High Fire Loads evaluate the fire suppression system's ability to suppress large fires. As an example, these large fires may originate from a broken pressurised fuel hose that sprays against hot surfaces, resulting in rapid fire development. It is crucial that fire suppression systems can effectively deal with these fires, as they may even occur if reliable detectors are installed.
• Low Fire Loads are used to judge the system's ability to deal with small fires in an enclosure. These small fires can be difficult to extinguish and require that the distribution of suppressant in the compartment is effective.
• Systems that can extinguish our Class A Fires have proven their ability to deal with deap-seated fires in fibrous materials. Examples of such materials are sound insulation, rubber and/or some plastics, which commonly act as a secondary fuel source.
• Obstructions are often present in engine compartments. This is emphasised in our Hidden Fires test. Here the suppression system shall extinguish a small obstructed fire that is out of reach for direct fire suppression. As such, the total flooding capabilities of a system is evaluated.
• Certain components in engine compartments may still be hot enough to ignite flammable material after a fire has been extinguished. Our Hot Surface Re-Ignition test evaluates the fire suppression system's performance in cooling down those hot surfaces.

The Level of Opennes of our testing rig can be modified to reflect the environment in which the fire suppression system shall be used. This will affect the final rating of the fire suppression system also, with an increasing score for an increasing level of openness. The highest possible openness level is achieved when tests are completed when no floor, ceiling, and walls are considered in the testing rig.

After testing, a test report is delivered with the results which may be the basis for product approval, for example according to SPCR 183 or SPCR 199 (P-mark).

SP Method 4912

UNECE R107

AIS 135

Corrosion and durability testing through alternate immersion of materials and coatings are offered for the different corrosive environments near and at sea.

Corrosion testing using alternate immersion offers a reproducible setup to evaluate corrosion protection properties of materials and surface protection. It can be designed dependant on the material or environment of interest.

Multiple test objects is mounted on the test equipment which is programmed to immerse the test objects in a vessel with liquid. The immersion time can be programmed according to standards or customized needs.

This service is offered at Kristineberg Marine Research and Innovation Centre and Borås.

Detailed scientific report and quick test results are offered with focus on quality and secrecy.

Contact us for price information. Please find contact information below

The customer is responsible for preparations of test objects if nothing else is agreed.

ASTM G44 and G31

Volvo STD 423-0067

ISO 11130

Testing and assessments of corrosion protection and corrosion properties of materials and coatings are offered for marine environments.

Electrochemical corrosion tests using a potentiostat/galvanostat is a powerful tool for evaluation and increasing knowledge of durability of materials in marine environments.

Enables detection and monitoring of different stages of corrosion progression.

A potentiostat/galvanostat can be connected to up to 8 separate cells/samples and measures corrosion mechanisms over time during exposure in natural seawater from surface and depth.

In-depth studies of corrosion protection properties can be performed using e.g. EIS (Electrochemical Impedance Spectroscopy) and LPR (Linear Polarisation Resistance).

This service is offered in RISE lab at Kristineberg Marine Research and Innovation Centre on the West-coast of Sweden.

Detailed scientific reports and quick test results are offered with focus on quality and secrecy.

Please find contact information below

The customer is responsible for preparations of test objects if nothing else is agreed

ASTM G59

ASTM G5

ASTM G61

ASTM F 2129

EIS (Electrochemical Impedance Spectroscopy)

LPR (Linear Polarisation Resistance)

Corrosion and durability testing of materials and coatings are offered for the different corrosive environments near and at sea.

Exposure at field station is a powerful tool to evaluate corrosion protection properties of materials and surface protection. It is highly recommended as a complement to accelerated tests.

Short and long-term field exposures are offered on a jetty on the west-coast of Sweden at Kristineberg Marine Research and Innovation Centre.

The test site can facilitate different zones of exposure including atmospheric, splash and submerged.

Relevant atmospheric and water quality parameters are monitored thoroughly to gain understanding of test site environment and enable comparison with other international test site.

Detailed scientific report and quick test results are offered with focus on quality and secrecy.

Contact us for price information. Please find contact information below

The customer is responsible for preparations of test objects if nothing else is agreed