(1) National Bureau of Standards.
Established by Congressional
action and is the legal base for all measurements in the United States.
(2) US
Army
Standards
Laboratory
(USASL).
Primary
Reference
Facility.
(a) Insures certification of primary standards by the National
Bureau of Standards (NBS).
This will be accomplished in accordance with
schedules established by AMCC and the NBS.
(b) Maintains primary reference standards of the highest level of
accuracy within the Army calibration system and insures that a minimum of
one set of these standards is maintained at the standards facility in a
state of certified accuracy at all times.
(c) Uses
and
maintains
primary
reference
standards
under
controlled environmental conditions.
(d) Provides the personnel required for operations at this level.
(e) Repairs, or causes to be repaired: all primary standards,
associated equipment used in the laboratory, and standards from other
facilities, as required.
(f) Establishes schedules and calibrates secondary reference
standards and other standards in accordance with certification periods that
are prescribed by AMCC. Fills out a calibration data card (DA Form 2416) in
accordance with TM 38-750 for each item calibrated.
(3) Secondary reference calibration facilities (Army Area Calibration
Labs, Internal Mission Labs).
(a) Maintain calibration standards in an accurately operating
condition with accuracies traceable to Army Standards Laboratory.
Insure
that a minimum of one set is maintained in a state of certified accuracy at
all times.
(b) Use and maintain secondary reference standards
under
the
following controlled environmental conditions (TB 750-117):
1
Temperature.
Dimensional or optical standards will be
calibrated in a laboratory maintained at 20 C 1 C (68 F 1.8 F).
Physical standards other than dimensional or optical will be calibrated in a
laboratory maintained at either 20 C 1 C (68 F 1.8 F) or 23 C 1 C
(73.4 F € 1.8 F). Electrical, electronic, or microwave standards will be
calibrated in a laboratory maintained at 23 C € 1 C (73.4 F 1.8 F).
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