Calibration Service Request
Calibration is defined in the international dictionary of metrology as "The series of operations that establish the relationship between the values indicated by measuring instruments or measuring systems or the values represented by measuring or reference materials under specified conditions and the corresponding values realized by standards."
TÜBİTAK SAGE Calibration Laboratory was established in 2004 to serve the calibration of the devices within TÜBİTAK SAGE and was accredited by TÜRKAK in 2011 under the code AB-0085-K as a calibration laboratory within the scope of TSE EN ISO/IEC 17025 General Requirements for the Competence of Testing and Calibration Laboratories. Details of the accreditation scope of the laboratory can be found on the TÜRKAK website.
TÜBİTAK SAGE Calibration Laboratory has set the goal of continuing its activities with technical excellence and high quality according to the current national and international standards in the relevant fields, whose effectiveness is continuously improved with the conditions of TS EN ISO/IEC 17025 General Requirements for the Competence of Testing and Calibration Laboratories.
Detailed information on the measurement capabilities of TÜBİTAK SAGE Calibration Laboratory is provided.
Temperature Calibration
In temperature metrology, all measurements must be traceable to the International Temperature Scale-1990 (ITS-90). This scale is the most important element that ensures that all temperature measurements in the world are accurate, reliable and equivalent.
The laboratory performs comparative calibration of numerical display thermometers, thermocouples and resistance thermometers covering the temperature range from -90 °C to 1,100 °C based on ITS-90. In addition to these, Determination of Temperature and Humidity Distribution in Temperature Controlled Volumes and Muffle Furnace calibrations are also accredited areas of the laboratory.
Instruments used in temperature calibrations
Triple Point of Water (TIP)
It is used to measure the stability of thermometers. In this way, the drift in the temperature values of the thermometers is detected by re-measuring the SPRT value. During the creation of the ITS-90 scale using SPRT, theÜN value is measured after each fixed point measurement and the ratio values defined by ITS-90 are calculated. In this way, SPRT measurements are standardized.
Standard Platinum Resistance Thermometer (SPRT)
25 ohm thermometers are the most remarkable product of the ITS-90 series. With 2 reference SPRTs in the laboratory inventory, temperature calibration can be performed with low uncertainty in the range of -90 °C to +420 °C.
Calibration Baths
There are 3 liquid baths that are used in areas where high temperature stability and precision are required: an alcohol/water bath from -80 °C to +70 °C, an oil bath from 70 °C to +250 °C and a liquid salt bath for high temperatures from 200 °C to 550 °C. These baths are used for comparative calibration of the thermometers to ensure stable operation at the desired temperature point with high accuracy and precision.
Horizontal Calibration Furnace
300 °C to +1,200 °C dry air horizontal oven with 3 zone heater control. It is ideal for calibrating long thermometers used at high temperatures due to its high accuracy and sensitivity with stable operation along the horizontal axis. From 300 °C to 1,100 °C, it is used for comparative calibration of thermometers.
Dry Block Calibrators (VERTICAL)
Operating in the temperature ranges -90 °C to +125 °C, 100 °C to +650 °C and 650 °C to 1,100 °C, the vertical dry block ovens feature high temperature stability and fast heating/cooling times. They are particularly suitable for devices with short temperature sensors.
Reference Temperature and Humidity Meter
The Reference Temperature and Humidity meter device used between 0% RH and 100% RH ensures stable calibrations with high accuracy and precision in Temperature and Humidity controlled volumes. It is used in the comparative calibration of Temperature and Humidity controlled volumes between 15% RH and 95% RH.
Data Acquisition Systems
The SPRT module can read 25 ohm, 100 ohm four-wire RTDs, PRTs and thermocouples with very high accuracy and is used as a reference indicator in comparative calibrations. The precision thermocouple module can be used with all types of thermocouples, including S-type platinum thermocouples and the new gold platinum thermocouples for standards. The handheld reference temperature gauge has a Pt-100 resistance thermometer for field applications and two input channels to read all types of thermocouples.
Precision Multimeter and Precision Resistance Bridge
The 8.5 Digit Precision Reference Multimeter is used for measurements with high accuracy and precision in the resistance range from 2 Ω to 20G Ω, voltage range from 200 mV to 1,000 V and -200 °C to +660 °C. With the Precision Resistance Bridge, measurements with a resolution of 0.01 mK in the range from -200 °C to 1,800 °C can be taken with high accuracy.
The services and working areas of the laboratory in this field are summarized in the table below.
| Calibrated Products | Limit Values |
|---|---|
| HEATWICH | Temperature Calibration -90 °C to +1,100 °C |
| PLATINUM RESISTANCE THERMOMETER | Temperature Calibration -90 °C to +420 °C |
| TEMPERATURE METER WITH DISPLAY | Temperature Calibration -90 °C to +1,100 °C |
| LIQUID GLASS THERMOMETER | Temperature Calibration -80 °C to +420 °C |
| DETERMINATION OF TEMPERATURE DISTRIBUTION IN TEMPERATURE CONTROLLED VOLUMES | Temperature Calibration -80 °C to +200 °C |
| DETERMINATION OF MOISTURE DISTRIBUTION IN TEMPERATURE CONTROLLED VOLUMES |
Humidity Calibration
% 20 RH to % 95 RH at 23 °C % 95 RH at 30 °C % 95 RH at 60 °C |
| ASH OVEN | Temperature Calibration 250 ºC to +1,350 ºC |
Humidity Calibration
The device information used is as follows
Air Conditioning Cabinet
The air conditioning cabinet, which can operate in the range of -70 °C to +180 °C, can be used as a humidity source.
Relative Humidity Meter
% can take real-time measurements with preheating and chemical cleaning features to operate in harsh conditions from 0 RH to % 100 RH.
The services and working areas of the laboratory in this field are summarized in the table below.
| Calibrated Products | Limit Values |
|---|---|
| TEMPERATURE AND HUMIDITY METER |
15 °C to +35 °C 20% RH to 95% RH |
Dimensional Calibration
Basic measuring instruments are dimension measuring instruments with widespread use in industry. Some factories have thousands of them in active use.
They are widely used to check whether the part produced at the time of manufacture is within the production tolerances or for the first check of the part produced after manufacture before starting precision measurements.
The devices defined as basic measuring instruments can be grouped under four headings:
Micrometer
They are basic measuring instruments produced by the principle of a screw shaft moving in a fixed unit. Commonly used micrometers are outer diameter micrometers. Micrometer calibration includes scale calibration, planarity and parallelism measurements of the measuring tips.
Conspiracy
They are the simplest and most basic measuring instruments used in dimensional measurements. It consists of a movable jaw that moves on a sled belonging to a fixed jaw and has a scale on it. Caliper calibration includes scale (outer diameter, inner diameter measuring jaws, depth and pitch) calibration, measurement of planarity and parallelism of the measuring ends.
Mihengir (Height Measuring Device)
They are like calipers but work upright and use the floor as a fixed jaw. Calibration of the caliper includes scale calibration, spindle and base planarity measurement and column perpendicularity measurements.
Measurement clock
Measuring clocks are mechanisms that, according to their structural characteristics, magnify the movement of the measuring pin with gear wheel mechanisms of different configurations and reflect it on a rotating scale. Calibration of the gauge includes scale calibration and force measurement of the measuring shaft.
Calipers, micrometers, calipers and dial gauges are calibrated in the laboratory with references that are traceable to the accredited organization.
The services and working areas of the laboratory in this field are summarized in the table below.
| Calibrated Products | Limit Values |
|---|---|
| MICROMETER | 0 ≤ L ≤ 300 mm (Partition Value: 0.001 mm) 300 ≤ L≤ 500 mm (Partition Value: 0.01 mm) |
| CONSPIRACY | 0 ≤ L ≤ 1,000 mm (Partition Value: 0.01 mm /0.02 mm /0.05 mm) |
| COMPRESSOR CLOCK | 0 ≤ L ≤ 100 mm (Partition Value: 0.001 mm) |
| MIHENGIR | 0 ≤ L ≤ 1,000 mm (Partition Value: 0.01 mm /0.02 mm /0.05 mm) |
Balance Calibration
A weighing device (scale) is a measuring device used to determine the mass of an object by utilizing the effect of gravity on that object. A non-automatic weighing device is a device that requires the intervention of an operator in placing the load on the load carrier, lifting it and obtaining the weighing results.
Calibration of the scales is carried out with mass standards that are traceable to the international kilogram prototype. In balance calibration, the indicator value given by the instrument in response to an applied load is obtained. The results are expressed in mass units.
Calibration of non-automatic electronic scales in the laboratory is carried out using masses produced according to OIML-R111 and traceability is ensured by the accredited organization
The services and working areas of the laboratory in this field are summarized in the table below.
| Calibrated Products | Limit Values |
|---|---|
| NON-AUTOMATIC ELECTRONIC SCALES |
1 mg ≤ m≤ 20 kg (with E2 class weights) 10 kg ≤m ≤ 50 kg (with F1 class weights) 10 kg ≤m ≤ 100 kg (with F2 class weights) 5 kg ≤ m≤ 200 kg (with M1 class weights) |
Material Testing Machine Calibration
Materials testing machines are used to determine the mechanical properties of materials. Mechanical properties are determined based on the force and elongation values measured by the testing machine.
Force calibration is performed by applying forces of known value to the load-bearing member and recording the data in the gauge or deflection measuring system, which is considered an integral part of the force measuring device.
The device information used is as follows:
Data collection system
Indicator reflecting the characteristic measured values of the reference.
Force sensor
The force calibration of test machines is carried out with a force sensor calibrated according to EN ISO 376 with a class value equal to or better than the class of the machine to be verified.
The services and working areas of the laboratory in this field are summarized in the table below.
| Calibrated Products | Limit Values |
|---|---|
| FORCE MEASUREMENT SYSTEMS |
20 N ≤ F≤ 100 kN (tensile with class 0.5 load cell) 20 N ≤ F≤ 1,000 kN (compression with class 0.5 load cell) |
Accelerometer Calibration
The measurement magnitude commonly used in vibration measurements is acceleration. The unit of acceleration is defined as the unit derived from the International System of Units (SI) using the fundamental quantities meters (m) and seconds (s). Therefore, unlike the basic SI units, it does not have a definition declared by CIPM.
The primary standard in the field of vibration is obtained by calibrating accelerometers, which are the reference standard. In calibration, the complex sensitivity value of the accelerometer is determined. The sensitivity of a vibration transducer is defined as the ratio of the electrical output to the applied mechanical input. The sensitivity can be measured independently at each frequency within the operating frequency range of the accelerometer. For all transducers, the sensitivity varies with frequency.
The reference accelerometer and the accelerometer whose sensitivity is to be determined are connected back-to-back and exposed to the same acceleration level. Calibration is performed by comparing the reference accelerometer with the test accelerometer.
Technical specifications of the devices used are given below.
Accelerometer calibration system
- Frequency Range: 2 Hz - 20 kHz Together with 9155D-831 Air Cushioned Shaker
- Calibration Method: ISO 16063-21 Back-to-Back comparison
- Measurements: Sensitivity, Amplitude, Phase, Bias, Resonance, Linearity, Shock
- Supported Accelerometers: ICP®, Charge, Voltage, Capacitive, Piezoresistive
- Acceleration Level: 0.1 G - 10 G
- TEDS Sensor Support: IEEE1451.4, IEEE P1451.4
- Excitation Type: Stepped Sine, Multi-Sine
- Unit of Measurement: Metric, Imperial
Shock accelerometer calibration system
System to measure shock accelerometer sensitivity at high acceleration levels up to 10,000 G according to ISO 16063-22.
The services and working areas of the laboratory in this field are summarized in the table below.
| Calibrated Products | Limit Values |
|---|---|
| ACCELEROMETER (LOAD SENSITIVITY) | 0.98 m/s² ≤ acceleration ≤ 98 m/s² (2 Hz - 10 kHz) |
| ACCELEROMETER (VOLTAGE SENSITIVITY) | 0.98 m/s² ≤ acceleration ≤ 98 m/s² (2 Hz - 10 kHz) |
| ACCELEROMETER (PHASE) | 2 Hz ≤ f ≤ 5 kHz |
| SHOCK ACCELEROMETER | 196 m/s² ≤ acceleration ≤ 98,000 m/s² |
| VIBRATION EXCITER | 0.98 m/s² (160 Hz) |
Pressure Calibration
Pressure is defined as the vertical force acting on a unit area or the tension at any point of a fluid in a closed vessel. Depending on the reference point, pressure measurements are performed in five different ways. These are as follows can be classified:
- Gauge (Relative) Pressure measurement: Pressure measurement with reference to atmospheric pressure,
- Absolute Pressure measurement: Measurement with reference to vacuum (absolute),
- Negative Pressure measurement: Pressure measurement under atmospheric pressure with reference to atmospheric pressure,
- Differential Pressure measurement: Pressure measurement between two (any) unknown pressures,
- Atmospheric pressure measurement: Measurement of ambient air pressure with reference to vacuum (absolute).
Dynamic pressure calibration
In rapidly changing and developing industrial and scientific studies, static pressure measurements for some application areas cannot provide fully satisfactory information about the system. It is necessary to reveal the dynamic change and behavior of the pressure in the system in very small time units.
In the field of dynamic pressure metrology, which emerged for this purpose, dynamic pressure transducers, amplifiers and gauges that can dynamically measure the pressure in the system have been produced. At the same time, studies have also been carried out to ensure the traceability of dynamic pressure transducers and other components used with them by dynamically calibrating them.
The devices used in the field of pressure and some of their technical specifications are given below:
- Automatic hydraulic pressure calibrator (PPCH FLUKE)
- Automatic pneumatic pressure calibrator (PPC4 FLUKE)
- Reference pressure gauge (6962C 2000 KISTLER)
- Reference Pressure Gauge (KISTLER 6229AK)
- Precision Multimeter (KEITHLEY 2000)
- Druck Pressure Calibrator (DRUCK DPI 615)
- Pressure Calibrator (KISTLER 6907B1)
- Pressure Calibrator (KISTLER 5959)
- Pressure calibrator (dynamic, KISTLER 6909)
- Pressure calibrator (hydraulic, KISTLER 6906) The applied pressure is a square wave.
- Precision Multimeter (KEITHLEY 2000)
- Power Supply (GPC-3060D GOODWILL)
- Power supply (NI PXIE-4112 National Instruments)
- Multimeter (2015 KEITHLEY)
- Mulitmeter (NI PXI-4071 National Instruments)
- Data acquisition system (NI PXIE-4464 National Instruments)
- Data acquisition system (NI PXIE-1073 National Instruments)
The services and working areas of the laboratory in this field are summarized in the table below.
| Calibrated Products | Limit Values |
|---|---|
|
RELATIVE PRESSURE Manometers with Analog and Digital Display, Pressure Calibrator, Pressure Transducer, Pressure Transmitter, Differential Pressure Gauge |
-0.95 bar ≤ p ≤ -0.10 bar 0.7 bar ≤ p ≤ 35 bar 35 bar < p ≤ 140 bar 1 bar ≤ p ≤ 200 bar 200 bar < p ≤ 1,000 bar 2 bar ≤ p ≤ 20 bar 70 bar ≤ p ≤ 700 bar |
|
ABSOLUTE PRESSURE Manometers with Analog and Digital Display, Pressure Calibrator, Pressure Transducer, Pressure Transmitter, Differential Pressure Gauge |
-0.1 bar ≤ pabs ≤ 35 bar 35 bar < pabs ≤ 140 bar 0.1 bar ≤ pabs ≤ 200 bar 200 bar < pabs ≤ 1,000 bar |
| DYNAMIC PRESSURE GAUGE | 20 bar < p ≤ 5,000 bar |
Electrical Calibration
The calibration of electrical devices in the laboratory is carried out with reference devices that are traceable by accredited organizations. Some of these devices are listed below:
- Multifunction Calibrator (FLUKE 5520A)
- Reference Multimeter (FLUKE 8508A)
- Precision Calibrator (KISTLER 5395B)
The services and working areas of the laboratory in this field are summarized in the table below.
| Calibrated Products | Limit Values |
|---|---|
| ANALOG MULTIMETER | DC/AC current measurement and application: 20 A |
| DIGITAL MULTIMETER | DC/AC voltage measurement and application: 1.000 V |
| CLAMP MULTIMETER | Measuring resistance: 20 GΩ |
| AMMETER / VOLTMETER | Resistance application 300 MΩ |
| DATA COLLECTION |
DC/AC current measurement and application: 20 A DC/AC voltage measurement and application: 1.000 V Measuring resistance: 20 GΩ Resistance application 300 MΩ |
| POWER SOURCE | 20 A / 1,000 V |
| OSILOSCOPE | Up to 1 GHz |
| SIGNAL CONDITIONER | GAIN detection of DC / ICP / Charge / IEPE type signal conditioners |
