TB 3-6665-313-50
Table 4. Gage Performance Limits
Acceptable
Scale major
manometer indications
division indication
(inches of water)
Min.
Max.
1.16
0.84
1
2.16
1.84
2
3.16
2.84
3
4.16
3.84
4
5.16
4.84
5
6.16
5.84
6
7.16
6.84
7
8.16
7.84
8
the gage reading by one graduation (corrected).
b.
Adjustments.
Bubbles should form at the tip of the tube.
(1) Turn the BLEED VALVE to obtain an
(5) If bubbles do not form, slowly open the
indication of 2 inches of water (corrected) on the gage.
drain cock at the bottom of the bubbler assembly bowl,
(2) If bubbles form at the tip of the tube,
and allow the water to drain until bubbles form.
open the fill cup valve, add a small quantity of water,
(6) Repeat (1) through (5) above as
and close the fill cup.
necessary until no bubbles form at a corrected 2 inches
(3) Repeat (2) above until the bubbles no
of water gage reading and start to form at one
longer form.
graduation lower.
(4) Turn the BLEED VALVE to increase
Figure 3. Gage performance test equipment setup.
5
