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Measuring instrument calibration
»Length »Temperature »Pressure »Torque »Weight »Force
The service
Measuring instrument calibrating service.
Calibrating operations are fundamental to the metrology approval process, which must be regularly carried out on measuring equipment (UNI EN 30012-1). This operation is required to meet standard "UNI EN ISO 9001 Quality Assurance Systems".
The accreditation
TEC Eurolab S.r.l. calibrating centre is SIT-accredited by the primary Institute of Metrology Gustavo Colonnetti (National Council on Research - CNR).
Accreditation ensures the traceability of national and international samples and recognises the lab ability to issue SIT-calibration certificates for instruments, ranges, uncertainties and measuring conditions detailed in the specific accreditation table.
» Download SIT accreditation tables
Activities of the Centre
The calibrating centre carries out measurements in several physical magnitudes: length, pressure, hardness, torque, temperature, etc. Some of the activities are carried out under the SIT accreditation convention: for these activities TEC Eurolab S.r.l. issues a SIT certificate.
Other calibrations are carried out according to in-house procedures ensuring the traceability of the primary samples calibrated by EA (SIT, UKAS, DKD, etc) recognised bodies: following to these calibrations, TEC Eurolab S.r.l. issues a Calibration Report possibly attached to a calibrated instrument certificate of conformity to construction standards or criteria set forth by the customers.
Instrument fleet management
TEC Eurolab S.r.l. proposes for managing the whole customer instrument fleet.
For calibrating first samples – field in which we have no accreditation – we co-operate with other SIT centres. The management is carried out in a completely transparent way: the customer is notified by the SIT Centre carrying out the calibration and this is given all the information about the customer name and address. In this way, the issued certificates are directly addressed to the customer. As a matter of fact, as for calibrations carried out by other centres, TEC Eurolab S.r.l. acts as a broker, avoiding to its customers the job to manage technical/business relationships with several suppliers. From the technical point of view, the main liability for the certification is taken by the body issuing it: moreover, TEC Eurolab S.r.l. gives all the necessary information to the customer and directly contacts the SIT Centre for any technical issue.
Carried-out calibrations
The following is a list – not complete – of the instruments that can be calibrated in TEC Eurolab s.r.l., grouped according to the measured magnitude:
. length
. pressure
. torque
. temperature
. force
. weight
| Instrument |
Range |
Uncertainty* |
| Gauge Block |
Up to 100 mm |
(0,11+1L)µm |
| Ring gauge, settin ring |
Up to 5-200 mm |
(0,7+6,4L)µm |
| Plug gauges |
Up to 200 mm |
(0,6+6,7L)µm |
| Caliper |
Up to 500 mm |
(0,7+5,4L)µm |
| Dial gauge, dimensional transducer |
Up to 100 mm |
(0,5+3,2L)µm |
| Outside micrometer |
Up to 125 mm |
(0,2+5,4L)µm |
| Outside micrometer |
0 ÷ 500 mm |
(0,4 + 0,04 L) µm |
| Internal micrometer with 3-line contact |
0 ÷ 150 mm |
(0,8+ 6,5 L) µm |
| Internal micrometer |
0 ÷ 600 mm |
(0,8+ 6,5 L) µm |
| Depth micrometer |
0 ÷ 1.000 mm |
(0,4 + 0,04 L) µm |
| Caliper |
0 ÷ 2.000 mm |
( 0,9 + 6 L) µm |
| Height and scribing gauge |
0 ÷ 1.000 mm |
( 0,2 + 6,2 L) µm |
| Depth caliper |
0 ÷ 1.000 mm |
( 0,2 + 6,2 L) µm |
| Dial gauge, lever dial test indicator |
0 ÷ 100 mm |
( 0,5 + 10 L) µm |
| Alesometer |
0 ÷ 100 mm |
( 0,5 + 1,7 L) µm |
| Ring gauge and snap gauge |
0 ÷ 450 mm |
(0,7 + 6,5 L) µm |
| Plug gauge |
0 ÷ 600 mm |
(0,6 + 6,7 L) µm |
| Micrometer standard |
0 ÷ 800 mm |
(0,6 + 3,0 L) µm |
| Cone shaped gauge (ring or plug) |
0 ÷ 300 mm |
20" |
| Surface plate |
/ |
1 µm |
| Gauge Block |
0 ÷ 600 mm |
(0,5 + 1 L) µm |
| Angle gauge block |
0 ÷ 90° |
1' |
| Thread plug gauge |
0 ÷ 300 mm |
(1,7 + 4 L) µm |
| Thread ring gauge |
0 ÷ 300 mm |
(1,7 + 4 L) µm |
| Metro-riga rigida |
0 ÷ 100 mm |
(86 + 12 L) µm |
| Profile projector |
1.000 x 1.000 x 1.000 mm |
(0,6 + 11 L) µm |
| Level |
/ |
3 µm/m |
| Goniometer |
0 ÷ 360° |
7' |
| Measuring machine, 3 axis (CMM) |
800 mm |
The quantity is influenced by the environment |
| Differential type gauge block comparator |
100 mm |
The quantity is influenced by the environment |
| Unidimensional measuring machine |
500 mm |
The quantity is influenced by the environment |
| Dial gauge calibration machine |
500 mm |
The quantity is influenced by the environment |
| Special caliper: railway caliper |
2.000 mm |
level 0,4 mm; length 0,1 mm |
| Road meter |
20 km |
(15 + 1 L) mm |
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L (in meter)= Diameter – Nominal length – Instrument range.
*The uncertainty is stated as the standard uncertainty of measurement multiplied by the coverage factor k=2, which for a normal distribution corresponds to a coverage probability of 95%.
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| Instrument |
Range |
Uncertainty* |
| Manometer – Pressure transducer |
0 ÷ 700 bar |
0,015 % of range |
| Vacuometer |
-1 / 0 bar |
0,025 % of range |
*The uncertainty is stated as the standard uncertainty of measurement multiplied by the coverage factor k=2, which for a normal distribution corresponds to a coverage probability of 95%.
A SIT Certificated deadweight tester with corrected weights for local gravity ensures very low uncertainty.
| Instrument |
Range |
Uncertainty* |
| Thermometer (indicator with probe) |
-25 ÷ 1.200°C |
The quantity is influenced by the indicator resolution |
| Thermostatic chamber |
-25 ÷ 1.200°C |
The quantity is influenced by the indicator resolution |
| Thrmocouple |
-25 ÷ 1.200°C |
0,5°C |
| Resistance thermometer |
-25 ÷ 1.200°C |
0,5°C |
*The uncertainty is stated as the standard uncertainty of measurement multiplied by the coverage factor k=2, which for a normal distribution corresponds to a coverage probability of 95%.
Two standard thermometers ensure accurate temperature measurement.
A liquid bath and two metal block calibrators allow us to generate temperature from -25 °C up to 1200 °C with high stability in time and uniformity in the metal block volume.
| Instrument |
Range |
Uncertainty* |
| Adjustable torque wrench |
0 ÷ 2.000 Nm |
0,84 % |
| Fixed torque wrench |
0 ÷ 2.000 Nm |
0,84% |
| Oil pulse wrenches |
0 ÷ 1.000 Nm |
0,84% |
*The uncertainty is stated as the standard uncertainty of measurement multiplied by the coverage factor k=2, which for a normal distribution corresponds to a coverage probability of 95%.
A series of SIT calibrated torque measuring devices is the primary standard of the laboratory of industrial metrology of TEC Eurolab S.r.l.
| Instrument |
Range |
Uncertainty* |
| Dynamometer |
50.000 kg |
0,5 % |
| Load cell |
50.000 kg |
0,5 % |
*The uncertainty is stated as the standard uncertainty of measurement multiplied by the coverage factor k=2, which for a normal distribution corresponds to a coverage probability of 95%.
| Instrument |
Range |
Uncertainty* |
| Balance |
0-10 kg |
The quantity is influenced by the primary standard used in calibration. |
| Weight |
0-60 kg |
The quantity is influenced by the primary standard used in calibration. |
*The uncertainty is stated as the standard uncertainty of measurement multiplied by the coverage factor k=2, which for a normal distribution corresponds to a coverage probability of 95%.
A set of primary SIT certificated weights ensures high accuracy in balance calibration. Three balances allow us to calibrate weights by comparison.
| Calibrations at the customers’ |
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TEC Eurolab S.r.l. is able to offer an at-the-customers’ calibration for several instruments. This working mode has the advantage of eliminating the discomforts linked to the instrument shipment (instrument collection from the various departments, packing, shipment, etc.). On the contrary, it involves the disadvantages of on-site interventions, i.e. technician trip costs as well as a sure decay of measuring uncertainty, due to the environment conditions and to the instruments used on site.
The possible profitability of onsite interventions can be checked asking a relevant quotation. Moreover, mixed conditions are often applied: some instruments are calibrated onsite, i.e. at the customers’, and some other at the calibrating centre’s.
The instruments that can be calibrated onsite are the following:
- Altimeter
- Sliding gauge
- Outer micrometer
- Pressure gauge
- Transducer-dial gauge
- Scale
- 3D CMM
- Thermometer
- Thermostatic chamber
- Kiln
- Stove
- Surface plate
- Optical gauge
Operative conditions
» Instrument preparation
The instruments shall be perfectly cleaned, removed from possible optional, pipes, supports or machine tools.
» Calibration workplace
Arrangement of a workplace with chair and desk in a closed, well-lighted and suitably-large room with main supply. The environment temperature and humidity should be controlled, as far as possible.
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