a. In previous lessons you have seen that there are two secondary
levels in calibration: secondary reference and secondary transfer. Both of
these levels are operated by the Army calibration company.
b. In this lesson we are concerned with the overall operations of an
Army area calibration laboratory at the secondary reference level. Although
the prime concern of the laboratory is calibration of equipment, there are
many other activities besides calibration of equipment taking place in the
located in work areas separated from production and maintenance functions so
that they will be used as calibration standards only, and not as maintenance
Since temperature, humidity, dust, vibration, etc, affect the
General requirements for laboratories are listed
below; however, detailed specifications for reference facilities are
(1) Facility size.
A single facility should have at lest 8,000
square feet of working area, of which 2,000 square feet must be
(2) Environmental control requirements.
environmental control are listed in TB 750-117.
(3) Power requirements:
(a) 115 v 60 Hz single phase
(b) 208 v 60 Hz 3 phase
The total amount of power (a) and (b) are dependent upon the
avionics equipment and some RADAR systems are based on 400 Hz instead of 60
Hz; therefore, 400 Hz may also be a requirement. The TOE authorizes 3 each
c. Facility layout.
(1) It should be emphasized here that the facility's organization and
layout is flexible. Organization for operations and layout is dependent on