We offer calibrations for power quality parameters such as voltage, current and power for non-sinusoidal signals.

Power quality is a summary concept for assessing the quality of delivered electricity. Voltage level, distortion and transients are some of the parameters that determine the quality. The instruments used to measure power quality are therefore multi-function instruments which are usually called power quality instruments.

Non-sinusoidal signals

Power quality deficiencies are often due to loads on the network, but can also be due to natural phenomena such as lightning strikes or incorrect connection actions by grid owners. The proportion of "bad" and "sensitive" loads has increased over the years, while the deregulation of the electricity market has meant that more parties are involved in the supply of electricity today, compared to before. Today, it is no longer possible to assume that all the voltages and currents of the electric power grid are almost sinusoidal. An increasing proportion of the motor loads are inverter controlled and the offices are filled with computers, IT equipment and so on. Virtually all lighting in offices and business premises and industries consist of fluorescent tubes or LED lamps. These loads do not draw sinusoidal current and therefore produce large harmonic currents which in turn give rise to harmonic voltages. Although conditions are far from ideal, measuring instruments are often calibrated for ideal sinusoidal voltages and currents. This is partly due to tradition, partly since it is significantly more difficult to measure with non-sinusoidal signals.

The need for measuring instruments that measure correctly even under these conditions has increased greatly, both ordinary instruments and power quality instruments. In many measuring contexts, for example in quality assurance, contracts or disputes, it is necessary to have calibrated measuring instruments. Reference instruments are needed that cannot only verify instruments under ideal conditions. At RISE, we can therefore offer calibration for voltage, current and power for non-sinusoidal signals.

By calibrating your instruments and measurement systems with us, you get high quality measurements and minimize losses due to measurement errors. Regular calibration will give you information about how stable the instrument measures.

The basic function of a power quality instrument is to measure voltage, current, power and power factor. These functions are calibrated in the same way as a standard wattmeter. An extension of the basic function is to measure and save temporary peaks and dips in the voltage. The most common extra function of a power quality instrument is harmonic measurement, either to measure the level of individual harmonics or to measure the overall distortion level. Another common feature of these instruments is transient and flicker measurements.

With digital sampling technology as a basis, we have constructed a reference instrument, a digital sampling wattmeter, which, in addition to calibrating the above-mentioned quantities, can also be used for calibrating reactive and apparent power, power factor and total harmonic distortion.

Our reference instrument has, partly through our own verifications, partly through international comparison measurements, been found to have a measurement uncertainty that is within ±150 ppm in most situations. Through extensive research and development work, we can now offer calibration of even the most accurate instruments on the market.

We issue calibration certificates in Swedish or English. On our customer website for calibration, you can directly download the calibration certificate and get all the other information you need about the measuring devices.

We offer calibration of all types of electricity meters and reference electricity meters.

An electricity meter or energy meter measures electrical energy and is available as both single-phase and multi-phase.

The reference electricity meter is often called a power and/or energy measuring instrument of the highest accuracy class. These instruments are often used as a reference when calibrating and verifying power/energy measurement systems.

By calibrating your instruments and measurement systems with us, you get high quality measurements and minimize losses due to measurement errors. Regular calibration will also give you information about how stable the instrument measures over time.

We generate the desired power levels and then compare the instrument's display with our reference equipment, which has measurement uncertainty levels well within 0.01 percent.

The calibration can be performed single-phase or three-phase, 3-wire or 4-wire connection regardless of power factor.

The calibration services are adapted to the regulations for energy measurement systems, STAFS 2022:9, and are directly adapted to the needs when checking measurement systems of categories 2–5.

We issue calibration certificates in Swedish or English. On our customer website for calibration, you can directly download the calibration certificate and get all the other information you need about the measuring devices.

STAFS 2022:9 etc.

We offer calibration of all types of power meters, wattmeters or converters (transducers).

A power meter, wattmeter or converters (transducers)measures electrical power and is available as both single and multi-phase. We can also calibrate measuring bridges and loads for instrument transformers as well as perform calibrations for voltage, current and power for non-sinusoidal signals.

By calibrating your instruments and measurement systems with us, you get high quality measurements and minimize losses due to measurement errors. Regular calibration will also give you information about how stable the instrument measures.

We generate the desired power levels using our reference equipment, which has uncertainty levels well within 0.01 percent. The measurement value of the measuring instrument is then compared with our reference equipment. The calibration can be performed single-phase or three-phase, 3-wire or 4-wire connection for all power factors.

When measuring large power, we use current and voltage transformers together with electricity meters or power meters.

We issue calibration certificates in Swedish or English. On our customer website for calibration, you can directly download the calibration certificate and get all the other information you need about the measuring devices.

We perform all types of calibration services for high-voltage and high-current equipment, with the lowest possible measurement uncertainty. Services are performed in our high-voltage laboratory or on-site worldwide.

We have the ability to generate and measure at megavolt levels and can work in several test paddocks simultaneously. All calibrations have full traceability to fundamental quantities. Calibrations are performed by a group with strong competence in the field, both world-renowned researchers and experienced engineers.

The calibrations are carried out in our high voltage laboratory where we can generate the high voltages or currents required based on the customer's needs. We also offer a world-leading ability and competence to perform on-site calibration at customers worldwide. The methods we use meet the requirements of industry standards, such as IEC 60060–2 and IEC 61869-2.

Examples of calibration services:

• Measuring system for alternating voltage (AC)
• Measuring system for direct voltage (DC)
• Measuring system for lightning- and switching impulse (LI/SI)
• High voltage capacitors (capacitance and loss factor)
• Capacitance bridges
• High voltage AC power loss measurement system
• Voltage and current transformers
• Measuring system for direct current (DC) and alternating current (AC)
• Current clamps and Rogowski coils
• PD calibrators
• µΩ meter
• Ratio bridges
• Insulation tester
• Welding measuring equipment
• Electronic loads 

Above is a selection of calibration services, please contact us to discuss your specific needs.
 

We issue calibration certificates in Swedish or English. On our customer website for calibration, you can directly download the calibration certificate and get all the other information you need about the measuring equipment.

IEC 60060, IEC 60270, IEC 60044 etc.

Calibration of IR Pyrometers, Optical Pyrometers, Black Body Radiators and Tape Lamps.

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.

We have a unique equipment for calibrating IR pyrometers in the range -20 ° C to 1600 ° C, with measurement uncertainties better than 0.5 ° C.

Measurements in Black Body Radiators

The calibrations are performed by measurements in black-body radiators of the type heat-pipe with water, cesium and respectively. sodium or in commercial black body radiators. The black body jets are designed as a conical bottom cylinder or as a sphere, giving emissivities very close to the ideal black body = 1. The pyrometer to be calibrated is directed towards the black body radiator and the pyrometer indication is noted. The temperature in black-body radiators of the heat-pipe type is determined by a resistance thermometer or thermocouple, while the temperature in other black bodies is obtained from one or more of RISE's pyrometer norms.

Heat Pipe

The heat pipe consists of a closed, double-walled tube filled with a substance that evaporates in the heat pipe's working area. The pipe whose one end is terminated with a cone (120 °) is placed in a horizontal tube furnace with temperature control. When the furnace has heated the heat pipe to the desired temperature, the temperature gradients are equalized by the heat transport of the steam. In the hot portions the filling is evaporated whereby heat is bonded and in the colder portions the steam is condensed into liquid which is transported back by capillary action in an inlaid 'wick'.

Calibration by comparison

Industrial IR pyrometers and two-color pyrometers are calibrated by comparison in our black body radiators with our pyrometer norms.

Band lights and Pyrometers

Band lights and visual optical pyrometers are calibrated in the range 700 ° C to 2600 ° C.

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 Temperature provides comparative calibration of resistance thermometers and thermocouples.

The national laboratories have 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 fulfils all typical traceability and accreditation requirements that commonly exist in industry and society at large.

Comparative calibration of liquid-in-glass thermometers, resistance thermometers, thermocouples and digital temperature gauges. In comparative calibration, liquid baths and ovens are used to provide a stable measurement environment.

We compare calibration to most types of thermometers including digital thermometers and liquid-in-glass thermometers. We have different types of thermostated calibration baths that cover the area
-100 ° C to 550 ° C. Thermocouples are also calibrated in electric tubes up to 1200 ° C.

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 Temperature offers fixed point calibration of resistance thermometers and thermocouples.

The national laboratories have 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.

At present, RISE can realize the following eleven fixed points

• The triple points for water, argon and mercury
• The freezing points for indium, tin, zinc, aluminum, silver, gold and copper
• The melting point for gallium.

This means that RISE has the opportunity to directly reproduce the temperature scale according to ITS-90 in the entire range -189.3442 ° C to 2600 ° C.

Cell type fixing points

All fixing points are of cell type, ie a metal crucible, where the thermometer is inserted into a protective tube surrounded by the pure metal.

The thread method provides calibration up to 1600 ° C

We calibrate platinum-based thermocouples in both fixed-point cells and according to the so-called wire method. In the wire method, gold and palladium wires are melted in a tube furnace so that certain plateaus in the thermo-voltage curve are created, which allows calibration up to 1600 ° C.

We can offer complete fixed point calibrated platinum thermocouples with storage box and calibration table.

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.

- Temporarily out of service -

RISE has helped clients worldwide with accredited calibrations of heat flux meters for many years.

Unfortunately, our calibration furnace is now out of service. 
We aim to replace it with a new and improved custom-built furnace, 
but the time required for installation and commissioning is unknown and the date for restarting the service is therefore not set.

We have asked our accreditation body Swedac to cancel our accreditation during the replacement time.

As soon as the new equipment is verified to our standards, we will resume offering accredited calibrations for our clients.
For those who would like regular update emails during the progress, 
please send an email using the email button under “Ordering” to the right.

Please don’t hesitate to contact us if you have any questions.

The methods used in the new furnace will be in accordance with the following standards:

• ISO 14934-2, Fire tests — Calibration and use of heat flux meters, Part 2: Primary calibration methods (method 2).
   
• ISO 14934-3, Fire tests — Calibration and use of heat flux meters, Part 3: Secondary calibration method, clause 6 Secondary calibration in a primary furnace.

Both methods use a spherical black-body furnace as heat source.

Primary and secondary calibrations

• Primary calibration - 10 heat flux levels.
  Primary calibration is recommended for all your in-house reference meters.
• Secondary calibration - 3 heat flux levels. 
  Secondary calibration is suitable for all daily-use heat flux meters.
  More calibration levels can be added.

When we start with calibrations again, an accredited calibration certificate (ISO/IEC 17025) will be delivered.

Not available at the moment

Not available at the moment

Send your meter without houses or other mounting equipment. RISE takes no responsibility for any damage caused by, if needed,  demounting of external houses or other equipment attached to the heat flux meter.

To be able to calculate the incident radiation to the sensing surface, we need information about the diameter of the sensing surface. This information the purchaser have to collect directly from the producer of the heat flux meter before the calibration. If we don't receive this information, a default radius will be used.

Delivery address:
RISE Research Institute of Sweden AB
Att: Fredrik Kahl
Brinellgatan 4
House 3, Gate H
504 62 Borås, Sweden

The following standards will be used in the new furnace.

ISO 14934-2

ISO 14934-3

The National Laboratory for Photometry and Radiometry offers calibration of fiberoptic equipment.

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 scope of the national laboratory includes: 

• Responsivity of fiber optic detectors or power meters (850 nm, 1300 nm, 1550 nm)
• Wavelength of fiber optical sources (600 nm - 1550 nm)
• Wavelength of optical spectrum analysers (600 nm - 1550 nm)

Calibration of power meters are performed in comparison with a reference radiometer. Calibration of wavelength is performed using absorption lines in a gas cell. 

We also offer accredited calibration of: 

• Length scale for OTDR
• Loss deviation for OTDR
• Pulse characteristics for OTDR

The OTDR calibrations are not performed as part of the national laboratory but have separate accreditations. 

We are available for consultation with regard to fiber optic measurements and can also help with validation of equipment or measurement methods. 

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 or as an accredited calibration. 

The National Laboratory for Photometry and Radiometry offers calibration of radiometers, laser power meters and optical detectors.

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. 

Calibration is performed in accordance with existing internations standards and recommendations. 

A calibration consists of two parts, spectral responsivity and absolute responsivity. 

Spectral responsivity involves the detector being exposed to light at varying wavelengths from a monochromator in comparison with a reference detector. The calibration can span responsivities from 250 nm to 1600 nm. Typical test objects include silicon, germanium and InGaAs detectors. 

Absolute responsivity is calibrationed with laser light at certain wavelengths e.g. 514 nm, 633 nm or 1550 nm. Either a reference detector or a reference radiometer is used as a reference. Radiometers are typically calibrated at 200 µW up to 10 mW. Laser power meters can be calibrated up to around 800 mW. 

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.