Mass
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 |
0.72 μg |
Echelon II |
2 mg |
1.8 μg |
Echelon II |
5 mg |
2.8 μg |
Echelon II |
10 mg |
0.65 μg |
Echelon II |
20 mg |
2.0 μg |
Echelon II |
50 mg |
3.0 μg |
Echelon II |
100 mg |
2.7 μg |
Echelon II |
200 mg |
1.9 μg |
Echelon II |
500 mg |
2.3 μg |
Echelon II |
1 g |
1.4 μg |
Echelon II |
2 g |
1.2 μg |
Echelon II |
5 g |
2.2 μg |
Echelon II |
10 g |
6.1 μg |
Echelon II |
20 g |
6.5 μg |
Echelon II |
50 g |
9.1 μg |
Echelon II |
100 g |
0.014 mg |
Echelon II |
200 g |
0.051 mg |
Echelon II |
500 g |
0.053 mg |
Echelon II |
1 kg |
0.23 mg |
Echelon II |
2 kg |
0.48 mg |
Echelon II |
5 kg |
2.2 mg |
Echelon II |
10 kg |
2.6 mg |
Echelon II |
20 kg |
13 mg |
Echelon II |
50 lb. |
16 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. |
