LAT Calibration Center No. 00121
ACCREDIA-accredited calibration of balances up to 1000 kg and of micro-dispensers from 0.1 µL to 200 mL.
ACCREDIA-accredited calibration center
Gibertini Elettronica is accredited by ACCREDIA as LAT calibration center No. 00121, in accordance with UNI CEI EN ISO/IEC 17025, for the calibration of weighing instruments (balances, NAWI) and of micro-dispensers (POVA): pipettes, syringes, dispensers, diluters and burettes.
- Accreditation number: LAT No. 00121
- Reference standard: UNI CEI EN ISO/IEC 17025
- Accredited instruments: balances (NAWI) and micro-dispensers (POVA): pipettes, syringes, dispensers, diluters and burettes
- Accredited: balances since 1997, micro-dispensers since 2002 (originally by SIT, now ACCREDIA)
- Instrument brand: any
The accredited measurement ranges, locations and calibration uncertainties can be consulted in the official schedule published by ACCREDIA, in the laboratory record, and in summary in the in-depth article on accredited calibration.
Accredited center since 1997
LAT No. 00121
The mark appears on the calibration certificates issued by the center.
Open the record on ACCREDIAIn depth
Accredited calibration and calibration documents, for balances and micro-dispensers.
Accredited calibration of balances
Balances up to 1000 kg, calibrated at the customer's site.
Balances
Non-automatic weighing instruments
- Minimum weight according to the EURAMET cg-18 guide on request
- Statement of conformity to the customer's requirements on request
- Checks according to Ph. Eur. 2.1.7, GMP and GLP on request, not accredited
The LAT calibration certificate for balances
Official document with the ACCREDIA mark, issued by LAT center No. 00121.
Identification and traceability
- Identification of the instrument, the customer and the calibration activity
- Certificate number and signature of the laboratory technical manager
- Traceability chain of the center and calibration procedure applied
- Technical data of the instrument and configuration parameters
- Date, location and ambient conditions of the calibration
Tests and results
- Repeatability test, expressed as the standard deviation of the readings
- Eccentricity test
- Linearity test, with the indication errors
- Expanded global uncertainty, with k = 2 and a confidence level of approximately 95 %
- Table of the expanded global uncertainty as a function of load
On request
In the same certificate
- Minimum weight according to the EURAMET cg-18 guide, with values as a function of the safety factor and of the accuracy level required by the process
- Statement of conformity to the customer's requirements, according to ISO/IEC 17025 and the ILAC-G8 guide, on the repeatability, eccentricity and linearity tests, with the decision rule agreed at contract stage
- Checks according to Ph. Eur. 2.1.7, GMP and GLP, not accredited
The decision rule establishes how measurement uncertainty is taken into account in the statement of conformity. The tolerance limit comes from a standard or from the customer's process requirements.
Global uncertainty and minimum weight in the certificate
Table of the expanded global uncertainty as a function of load
The certificate gives the expanded global uncertainty as a linear equation of the load R, with k = 2, and the table of values by percentage of load.
| Load | R | Ugl(W) | Ugl(W) / R |
|---|---|---|---|
| 0 % | 0 g | 0.000087 g | — |
| 10 % | 6 g | 0.000105 g | 0.0018 % |
| 25 % | 15 g | 0.000132 g | 0.0009 % |
| 50 % | 30 g | 0.000178 g | 0.0006 % |
| 75 % | 45 g | 0.000223 g | 0.0005 % |
| 100 % | 60 g | 0.000269 g | 0.0004 % |
Minimum weight according to the EURAMET cg-18 guide
Minimum weight as a function of the accuracy required by the process and of the safety factor SF, calculated from the same global uncertainty.
| Required accuracy | SF = 1 | SF = 2 | SF = 3 |
|---|---|---|---|
| 0.1 % | 87.3 mg | 175.1 mg | 263.4 mg |
| 0.5 % | 17.4 mg | 34.8 mg | 52.3 mg |
| 1.0 % | 8.7 mg | 17.4 mg | 26.1 mg |
Values calculated from the example in the Gibertini application note on minimum weight: laboratory balance with 60 g capacity and 0.00001 g readability. Each balance has its own global uncertainty and its own minimum weight, stated in its certificate.
In-depth documents
Accredited calibration of micro-dispensers
Micro-dispensers from 0.1 µL to 200 mL, calibrated in the Novate Milanese laboratory.
Micro-dispensers
Single-channel and multichannel, fixed or variable volume
- Calibration procedures compliant with ISO 8655-6:2022
- Statement of conformity to ISO 8655-2, -3, -4, -5 and -9, according to the type of instrument
- Test volumes: the nominal volume on fixed-volume instruments, at least three volumes on adjustable-volume instruments; on multichannel instruments, every channel
- Statement of conformity to the customer's requirements on request
- Checks according to GMP and GLP on request, not accredited
- Delivery within 15 days of receipt of the order
Decontamination form. Pipettes, syringes, dispensers, diluters and burettes sent to the laboratory must be accompanied by the completed decontamination form. Download the decontamination form (PDF, in Italian)
What changes in ISO 8655-6:2022The LAT calibration certificate for micro-dispensers
Official document with the ACCREDIA mark, issued by LAT center No. 00121.
For each volume calibrated, the certificate gives the systematic error and the random error, determined gravimetrically according to ISO 8655-6, with the associated uncertainty, and the statement of conformity to the maximum permissible errors of the part of ISO 8655 applicable to the type of instrument.
Identification and traceability
- Identification of the instrument, the customer and the calibration activity
- Certificate number and signature of the laboratory technical manager
- Traceability chain of the center and calibration procedure applied
- Technical data of the instrument and configuration parameters
- Date, location and ambient conditions of the calibration: water and ambient temperature, relative humidity, atmospheric pressure
Tests and results
- Gravimetric tests according to ISO 8655-6: at the nominal volume on fixed-volume instruments, at at least three volumes on adjustable-volume instruments and, on multichannel instruments, on every channel
- Systematic error and random error (standard deviation and coefficient of variation) for each volume calibrated
- Expanded global uncertainty, with a coverage factor corresponding to a confidence level of approximately 95 %
- Statement of conformity to ISO 8655-2, -3, -4, -5 and -9, according to the type of instrument
On request
Statements and checks
- Statement of conformity to the customer's requirements
- Checks according to GMP and GLP, not accredited
Chapter 2.1.7 of the European Pharmacopoeia covers only balances for analytical use; for micro-dispensers, the checks on request refer to the customer's GMP and GLP requirements. The parts of ISO 8655 cited in the statement of conformity are described below.
Pipettes
Air-displacement (type A) and positive-displacement (type D) pipettes, single-channel and multichannel, with tips: metrological requirements, maximum permissible errors, marking and information for the user.
Burettes
Burettes up to 100 mL nominal volume: metrological requirements, maximum permissible errors, marking and information for the user.
Diluters
Diluters with a sample uptake capacity from 5 µL to 1 mL and a diluent delivery capacity from 50 µL to 100 mL: metrological requirements, maximum permissible errors, marking and information for the user.
Dispensers
Dispensers with nominal volume from 1 µL to 200 mL: metrological requirements, maximum permissible errors, marking and information for the user.
Syringes
Manually operated precision laboratory syringes, in glass or glass and metal, for liquids and gases: metrological requirements, maximum permissible errors, marking and information for the user.
Measurement procedure
Gravimetric reference method for determining volume, applied by the center in calibration.
ISO 8655 series, «Piston-operated volumetric apparatus», 2022 edition. Sources: ISO and national standards bodies.
Metrological traceability
The LAT calibration certificate documents the link between the calibrated instrument and the national and international measurement standards. The traceability chain is the unbroken sequence of documented calibrations that connects the working standard used in the measurement to the primary standards, through certificates that are themselves traceable.
The center's calibration methods, the EURAMET cg-18 guide for balances and ISO 8655-6:2022 for micro-dispensers, are those in the ACCREDIA accreditation schedule. The uncertainty given in the certificate is the expanded uncertainty with a coverage factor corresponding to a confidence level of approximately 95 %; for balances the coverage factor is k = 2 and the uncertainty is determined according to the EURAMET cg-18 guide.
Accreditation attests to the technical competence, independence and impartiality of the laboratory. In Italy, ACCREDIA is the sole national accreditation body appointed by the Government under Regulation (EC) No. 765/2008.
ACCREDIA is a member of EA, IAF and ILAC. For calibration it is a signatory of the EA MLA and ILAC MRA mutual recognition arrangements: certificates issued under its mark are recognized as equivalent by the accreditation bodies of the other signatory countries.
The calibration certificate is part of the quality management system documentation and may be requested during an inspection or audit.
The ISO calibration report is a separate service, without the ACCREDIA mark, performed by the technical service department on balances, platforms and silos up to 20 t and on other instruments.
Traceability chain
- International System (SI)Definition of the units of measurement
- National standardsPrimary standards
- Accredited centersCalibration of reference standards
- LAT Center No. 00121Working standards and certificate with the ACCREDIA mark
- Customer's instrumentBalance or micro-dispenser
EA MLA and ILAC MRA arrangements: certificate recognized by the accreditation bodies of the other signatory countries.
Request for accredited calibration
LAT laboratory No. 00121 performs accredited calibrations of balances at the customer's site and of micro-dispensers in the Novate Milanese laboratory.
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