TB 9-6670-254-50
Table 5. Tolerances for Class S-1 Weights - Continued.
Grain
Metric
Carat
Test
Tolerance
Test
Tolerance
Test
Tolerance
instrument
(mg)
instrument
(mg)
instrument
(mg)
---
---
100
1.0
---
---
---
---
50
0.60
---
---
---
---
30
0.45
---
---
---
---
20
0.35
---
---
---
---
10
0.25
---
---
---
---
5
0.18
---
---
---
---
3
0.15
---
---
---
---
2
0.13
---
---
---
---
1
0.10
---
---
Table 6. Acceptance Tolerances for Class S Weights1
Test instrument
Tolerance
kilogram
(mg)
25
62
20
50
10
25
5
12
3
7.5
2
5.0
1
2.5
Gram
500
1.2
300
0.75
200
.50
100
.25
50
.12
30
.074
20
.074
10
.074
5
.054
3
.054
2
.054
1
.054
1Maintenance
tolerances for weights below 100 mg are the same as the acceptance tolerances. For weights 100 mg and above,
the maintenance tolerances are twice the acceptance tolerances.
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Reference Calibration
Standards Set NSN 4931-00-6217878. Alternate items may be used by the calibrating
activity when the equipment listed in table 7 is not available. The items selected must be
verified to perform satisfactorily prior to use and must bear evidence of current calibration.
The equipment must meet or exceed the minimum use specifications listed in table 7. The
accuracies listed in table 2 provide a four-to-one ratio between the standard and TI. Where
