 |
|||
|
|
|||
| ||||||||||
|
|  MIL-C-52973A(ME)
4.5.2.13.3 Failure criteria.
Any one or more of the following shall
constitute failure of this test.
a.
Inability of the compressor to produce rated capacity.
b.
Inability of the compressor to operate for 500 hours without main-
tenance other than normal scheduled maintenance.
c.
Fuel tank capacity not as specified in 3.9.2.
d.
Pressure regulation not as specified in 3.11.
Air purity not as specified in 3.10.3 and 4.5.2.10.
e.
Air temperature at final filter inlet not as specified in 3.10.2.
f.
4.5.2.14
Reliability.
Two compressor units shall be tested as follows:
The operational and environmental test
4. 5.2.14.1 Test conditions.
conditions shall be as follows:
Without shelter and at the climate conditions exiting at the place of
a.
test.
b.
With the compressor units serviced in accordance with 4.5.2.1.
c.
Shall operate at rated speed and capacity for not less than 1125 hours,
with not less than 500 hours on a single unit.
Shall have capacity computations made on every 5th set of 4hour data
d.
reading as specified in 4.5.2.1.
e.
Test data shall be recorded as follows:
Air capacity shall be calculated as specified in 4.5.2.1 along
(1)
with constant factors and data used to compute the capacity
figure.
Air purity at the final filter in accordance with 4.5.2.10 re
(2)
corded immediately before and after each filter change and at
least once every 8 0.5 hours of compressor operation.
Downtime data each time the compressor unit is stopped, to
(3)
stop time and date, accumulated operating hours ,
include:
restart time and date, duration of downtime in hours and minutes;
reason, for each stop, and the amount of fuel and lubricants used.
The following shall be recorded every 4 0.5 hours.
(4)
a.
Air temperature, ambient.
b.
Air temperature at compressor inlet.
c.
Air temperature at final filter outlet.
d.
Delivery pressure.
Air purity at compressor outlet.
e.
f.
Air purity at final filter outlet.
Accept/reject cirteria.
The compressor units shall complete 1125
4.5.2.14.2
hours with one or less failures and not less than 500 hours on a single unit. A
failure shall be described in 4.5.2.14.3 and all failure shall be determined by
Figure 1 O-C curve applies.
the Government.
Failure definition and scoring criteria.
A failure for the
4.5.2.14.3
purposes of this test is defined as any malfunction which the operator cannot
22
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals