SECTION II.
EQUIPMENT REQUIREMENTS
4. Equipment Required.
the standard and TI. When the four-to-one ration cannot
specific equipment used in this calibration.
The
be met, the actual accuracy of the equipment selected is
equipment is issued with secondary transfer standards
shown in parenthesis.
calibration set, NSN 6695-00-621-7877. Alternate items
5. Accessories Required. Some of the accessories
may be used by the calibrating activity when the
listed in table 3 are issued as indicated in paragraph 4
equipment listed in table 2 is not available. The items
above, except for the one that is fabricated as shown in
selected must be verified to perform satisfactorily prior
to use and must bear evidence of current calibration.
When necessary, the items other than the one
The equipment must meet or exceed the minimum use
fabricated may be substituted by equivalent items.
specifications listed in table 2. The accuracies listed in
Figure 1. Fabrication instructions for connector (B1).
Table 2. Minimum Specifications of Equipment Required.
MINUMUM USE
MANUFACTURER, MODEL,
ITEM COMMON NAME
SPECIFICATIONS
AND PART NUMBER
A1
FLOWMETER *
Range: 2000 cc/min.
Shutte and Koerting, Model 18200 series (7907273)
Accuracy: 0.5% (2% full scale)
Tube - 03-Ryb and
Float - R-033;
Tube - 1-Ryb and
Float - BJ-9
A2
MANOMETER
Range: 0 to 3 inches of water
Wallace and Tiernan, Model
Accuracy: 0.5%
65D-4C-0120X or FA145600.(7912573)
* Procedure Limitations: Accuracy - 2% of full scale. Calibration is performed at 1000 cc/min. and at 3825 cc/min.
since the desired airflow rate of 2000 cc/min. can not be measured when using this instrument.
Table 3. Accessories Required
Item
Common Name
Description and Part Number
B1
CPMMECTOR
Fabricate in accordance with figure 1.
B2
TUBING
Plastic, -inch (R3603F) length as required.
SECTION III.
CALIBRATION PROCESS
NOTE
6. Preliminary Instructions. a. The instructions
outlined in this section are preparatory to the calibration
Unless otherwise specified, verify the results
process. Personnel should become familiar with the
of each test and take corrective action
entire bulletin (or specified sections) before beginning
whenever the test requirement is not met
the calibration.
before continuing with the calibration.
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