i. Exceptional critical requirements.
Calibration that requires more
stringent controls than those specified above will be documented and
submitted to AMCC for approval.
When approved, the returned operational
procedure will be recognized as a requirement and will be permanently filed
in the laboratory.
j. Operation of environmental conditioning equipment.
(1) Temperature, humidity, and dust.
conditioned air to the laboratory will be operated continually.
(2) Emergency power.
In general, there is no requirement for
local commanders will assure continuous and reliable power consistent with
k. Instrument protection.
Instruments susceptible to damage as a
result of interruptions (momentary or longer) will be protected by manually
reset circuit devices that open on loss of electrical power.
l. Loss of Laboratory Controlled Temperature Environment. Operational
emphasis will be placed on maintaining the controlled environment, but when
control is lost, emphasis will be placed on expeditiously reinstating the
environment to a controlled condition.
When the laboratory environment exceeds the limits of paragraph 4a above,
limited calibration may be continued as outlined in the following
subparagraphs. As a general rule, determine the instruments that are least
accurately calibrated without a controlled environment; determine the
standards that can be accurately used to accomplish calibration without a
controlled environment; and proceed with calibrations that will not degrade
the operational characteristics of the instrument to be calibrated.
Instructions in the following subparagraphs apply, and the procedures for
Technical publications for measurement standards
and TMDE will normally contain information relative to instrument operating
characteristics at various temperatures.
Through the use of these
publications, a determination can be made to use or not to use a measurement
standard to calibrate.
They can also be used to determine whether an
instrument can or cannot be calibrated when the laboratory temperature is
not within the specified limits.
temperature controls, e.g., oil bath resistors, may be used to calibrate (or
be calibrated) when the temperature of the instrument is within