PLEASE DISTRIBUTE THIS CHANGE TO ALL OF YOUR SERVICE PERSONNEL.
The following table serves as a replacement table for the one listed on page 3-28 for Section 3.31., "Vehicle-Tank Meters Code" of the 2003 Edition of NIST Handbook 44.
In particular, the tolerances for Accuracy Class 0.3 devices, under the column heading "Acceptance Tolerance," was changed from 0.2% to 0.15% and under the column heading "Special Test Tolerance," was changed from 0.5% to 0.45%.
In addition, a row was added for Accuracy Class 1.5 devices for Water applications.
These changes accurately reflect Item 331-3, "Tolerances, Table 1. Accuracy Classes for Vehicle-Tank Meters," of the Specifications and Tolerances Committee Final Report, adopted at the 87th National Conference on Weights and Measures in July 2002.
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Tolerances, Table 1.
Accuracy Classes for Vehicle-Tank Meters
|
|
Accuracy
Class
|
Application
|
Acceptance
Tolerance
|
Maintenance
Tolerance
|
Special Test
Tolerance
|
|
0.3
|
Petroleum products including large capacity motor fuel devices (flow rates over 115 L/min (30
gpm))**, heated products at or greater than 50 °C asphalt at or below temperatures 50
°C, all other liquids not shown where the typical delivery is over 200 L (50 gal) |
0.15 %
|
0.3 % |
0.45 % |
| 0.3A |
Asphalt at temperatures greater than 50
°C |
0.3 % |
0.3 % |
0.5 % |
| 0.5 |
Petroleum products delivered from small capacity (at 4 L/min (1
gpm) through 115 L/min (30 gpm))** motor-fuel devices, agri-chemical liquids, and all other applications not shown. |
0.3 % |
0.5 % |
0.5 % |
| 1.1 |
Petroleum products and other normal liquids from devices with flow rates** less than 1 gpm and devices designed to deliver less than one gallon. |
0.75 % |
1.0 % |
1.25 % |
| 1.5 |
Water |
Overregistration |
1.5 % |
1.5 % |
1.5 % |
| Underregistration |
1.5 % |
1.5 % |
5.0 % |
|
*The maintenance tolerances on normal and special tests for 5-gallon and 10-gallon test drafts are 6 cubic inches and 11
cubic inches, respectively. Acceptance tolerances on normal and special tests are 3 cubic inches and 5.5 cubic inches.
** Flow rate refers to designed or marked maximum flow rate.
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