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Bob Quinn completes an air velocity measurement        Bob Quinn performs a mass flow calibration

ORNL Metrology Laboratory (ORNLML) maintains a variety of mass standards traceable to SI (International System of Units) through the National Institute of Standards and Technology (NIST) and other international primary laboratories. These standards are required to perform traceable calibrations of our customers’ instruments and equipment. ORNLML can provide accredited calibrations for mass sets and analytical balances within the ranges detailed in our Scope of Accreditation. However, traceable, non-accredited calibrations are available for mass parameters outside of our Scope of Accreditation. The tables below list our accredited capabilities. Our entire Scope of Accreditation includes complete details of our accredited capabilities.

If you have questions about our mass capabilities, please contact the ORNL Metrology Laboratory for more information.

Capability
Mass  (NVLAP Code: 20/M08)

Range

Best Uncertainty Note 1
(+/-)

Remarks

1 mg

0.7 μg

Echelon II

2 mg

2.0 μg

Echelon II

5 mg

0.93 μg

Echelon II

10 mg

1.5 μg

Echelon II

20 mg

1.4 μg

Echelon II

50 mg

2.2 μg

Echelon II

100 mg

1.8 μg

Echelon II

200 mg

1.9 μg

Echelon II

500 mg

4.6 μg

Echelon II

1 g

2.7 μg

Echelon II

2 g

3.0 μg

Echelon II

5 g

5.6 μg

Echelon II

10 g

8.4 μg

Echelon II

20 g

12 μg

Echelon II

50 g

24 μg

Echelon II

100 g

31 μg

Echelon II

200 g

0.42 mg

Echelon II

500 g

0.86 mg

Echelon II

1 kg

0.11 mg

Echelon II

2 kg

0.42 mg

Echelon II

5 kg

2.1 mg

Echelon II

10 kg

2.2 mg

Echelon II

20 kg

14 mg

Echelon II

50 lb.

15 mg

Echelon II

Note 1 Represents an expanded uncertainty using a coverage factor, k=2, at an approximate level of confidence of 95%.

Balances Note 2


Readability in mg

Uncertainty in mg

Remarks

0.001

0.0043

OIML Class E2 Weights

0.01

0.059

OIML Class E2 Weights

0.1

0.095

OIML Class E2 Weights

1

0.75

OIML Class E2 Weights

10

7.5

OIML Class E2 Weights

100

75

OIML Class E2 Weights

Note 2 This parameter is accredited for field service, reported uncertainties may be higher due to environmental conditions.

Any reference to "accredited" or "accreditation" refers to the National Voluntary Laboratory Accreditation Program (NVLAP) and applies to calibration services only as performed by the Oak Ridge National Laboratory's (ORNL) Metrology Laboratory (Lab Code 200159-0). Refer to the ORNL NVLAP scope of accreditation for details.

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