TB 9-6635-208-50
SECTION II
EQUIPMENT REQUIREMENTS
5. Equipment Required. Table 2 identifies the specific equipment used in this
calibration procedure. This equipment is issued with the secondary transfer calibration
standards set and is to be used in performing this procedure. Alternate items may be used
by the calibrating activity when the equipment listed in table 2 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 2. The accuracies listed in table 2 provide a four-to-one accuracy ratio
between the standard and TI. Where the four-to-one ratio cannot be met, the actual
accuracy of the equipment selected is shown in parenthesis.
6. Accessories Required. The accessories listed in table 3 are issued with the secondary
transfer calibration standards set and are to be used in this calibration procedure. When
necessary, these items may be substituted by equivalent items unless specifically
prohibited.
Table 2. Minimum Specifications of Equipment Required
Minimum use
Manufacturer, model and
Item
Common name
specifications
part number
A1
WEIGHT SET
Range: 0.05 to 16 oz
Henry Troemmer, Model
(AVOIRDUPOIS)
Accuracy: Class C
C1 (7910419)
A2
WEIGHT SET
Range: 16 to 40 oz
Sweeney, Model WT1
(AVOIRDUPOIS)
Accuracy: Class C
(7909056)
Table 3. Accessories Required
Item
Common name
Description and part number
B1
2-in. diameter (7911301)
MEASURING PULLEY
B2
4-in. diameter (7911302)
MEASURING PULLEY
B3
NYLON STRING1
20 feet, 5-lb test minimum
1Additional
equipment required.
SECTION III
NOTE
Unless otherwise specified, verify the results of each test and
take corrective action whenever the test requirement is not
met before continuing with the calibration.
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