INSCO UNCERTAINTY ANALYSIS FOR MASS LABORATORY

Uncertainty Analysis for

Mass Laboratory

Calibration and certification are performed at NSPR Mass Laboratory
certified by NVLAP under lab code 200454-0.

National Standards of Puerto Rico (NSPR) is a parent company of INSCO

The combined standard uncertainty is determined following the GUM “Guidelines for Uncertainty Measurements”, NIST SOP 29 “ Standard Operating Procedure for the Assignment of Uncertainty” and NIST Technical Note 1297 “Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurements Results”. The combined uncertainty is multiplied by a coverage factor, k, which equals 2 and provides a level of confidence of approximately 95%.

The table presents the uncertainty for 3-1 Design.

Nominal Value	Best Uncertainty	Artifact Class
(g)	(mg)
10000 g	1.6350099	Accuracy Class I
5000g	0.7832899	Accuracy Class I
3000g	0.3741079	Accuracy Class I
2000g	0.3711372	Accuracy Class I
1000g	0.0466530	Accuracy Class I
500 g	0.0271473	Accuracy Class I
300 g	0.0385863	Accuracy Class I
200 g	0.0324326	Accuracy Class I
100 g	0.0212025	Accuracy Class I
50 g	0.0109478	Accuracy Class I
30 g	0.0088914	Accuracy Class I
20 g	0.0065843	Accuracy Class I
10 g	0.0061213	Accuracy Class I
5 g	0.0034420	Accuracy Class I
3 g	0.0024235	Accuracy Class I
2 g	0.0018734	Accuracy Class I
1 g	0.0016461	Accuracy Class I
0.500 g	0.0009474	Accuracy Class I
0.300 g	0.0006766	Accuracy Class I
0.200g	0.0005479	Accuracy Class I
0.100 g	0.0005825	Accuracy Class I
0.050 g	0.0005251	Accuracy Class I
0.030 g	0.0005995	Accuracy Class I
0.020 g	0.0005402	Accuracy Class I
0.010 g	0.0005089	Accuracy Class I
0.005 g	0.0004734	Accuracy Class I
0.003 g	0.0005101	Accuracy Class I
0.002 g	0.0004111	Accuracy Class I
0.001 g	0.0004238	Accuracy Class I

The table presents the uncertainty for Double Substitution.

Nominal Value	Best Uncertainty	Artifact Class
(g)	(mg)
10000 g	1.92853	Accuracy Class II
5000 g	0.91777	Accuracy Class II
3000 g	0.45685	Accuracy Class II
2000 g	0.39460	Accuracy Class II
1000 g	0.04692	Accuracy Class II
500 g	0.02831	Accuracy Class II
300 g	0.03913	Accuracy Class II
200 g	0.03292	Accuracy Class II
100 g	0.02201	Accuracy Class II
50 g	0.01194	Accuracy Class II
30 g	0.00983	Accuracy Class II
20 g	0.00766	Accuracy Class II
10 g	0.00710	Accuracy Class II
5 g	0.00495	Accuracy Class II
3 g	0.00411	Accuracy Class II
2 g	0.00376	Accuracy Class II
1 g	0.00358	Accuracy Class II
0.500 g	0.00317	Accuracy Class II
0.300 g	0.00298	Accuracy Class II
0.200g	0.00290	Accuracy Class II
0.100 g	0.00282	Accuracy Class II
0.050 g	0.00240	Accuracy Class II
0.030 g	0.00219	Accuracy Class II
0.020 g	0.00206	Accuracy Class II
0.010 g	0.00195	Accuracy Class II
0.005 g	0.00172	Accuracy Class II
0.003 g	0.00163	Accuracy Class II
0.002 g	0.00157	Accuracy Class II
0.001 g	0.00147	Accuracy Class II

The table presents the uncertainty for Modified Substitution.

Nominal Value	Best Uncertainty	Artifact Class
	(mg)
50 kg	13.928390	Accuracy Class III
30 kg	13.928390	Accuracy Class III
20 kg	13.928390	Accuracy Class III
10 kg	2.028040	Accuracy Class III
5 kg	1.432920	Accuracy Class III
3 kg	1.256930	Accuracy Class III
2 kg	1.256070	Accuracy Class III
1 kg	1.200900	Accuracy Class III
500 g	0.117700	Accuracy Class III
300 g	0.120860	Accuracy Class III
200 g	0.119040	Accuracy Class III
100 g	0.116490	Accuracy Class III
50 g	0.011100	Accuracy Class III
30 g	0.009230	Accuracy Class III
20 g	0.007120	Accuracy Class III
10 g	0.006760	Accuracy Class III
5 g	0.018300	Accuracy Class III
3 g	0.018140	Accuracy Class III
2 g	0.018080	Accuracy Class III
1 g	0.018060	Accuracy Class III
0.500 g	0.006060	Accuracy Class III
0.300 g	0.006020	Accuracy Class III
0.200g	0.006010	Accuracy Class III
0.100 g	0.006010	Accuracy Class III
0.050 g	0.006010	Accuracy Class III
0.030 g	0.006010	Accuracy Class III
0.020 g	0.006010	Accuracy Class III
0.010 g	0.006010	Accuracy Class III
0.005 g	0.006010	Accuracy Class III
0.003 g	0.006010	Accuracy Class III
0.002 g	0.006010	Accuracy Class III
0.001 g	0.006010	Accuracy Class III