and screen all incoming technical and regulatory material
calibration techniques, procedures, or equipment modification.
in interpreting and implementing directives and instructions as
Overall training requirements and arrangements for school
calibration personnel are the responsibilities of the operations
h. The secondary reference laboratory must have an environmentally
controlled area for the secondary transfer standards to be put in so they
have time to reach ambient temperature before they can be calibrated. The
period of time is usually 24 hours. This will vary by instrument type. A
log-in and log-out register may be maintained to keep a record of the
soaking time, specialist, and the amount of time required to calibrate the
i. Laboratory supervisors will assure that temperature and humidity
recording systems are maintained in continuous operation as outlined in TB
An electrically driven recording chart will be
functioning continuously. The recording temperature chart indicator must be
visible so a calibration specialist can keep a check on it at all times and
not interrupt his work.
Secondary Reference Standards.
In any highly accurate measurement,
must be used in a known stable environment.
The following are the
(1) Dimensional or optical standards: 20C 1C (68F 1.8F).
(2) Physical standards, other than dimensional or optical, may be
calibrated with dimensional, optical, electrical, or electronic standards
and operated satisfactorily at the temperatures specified for those
(73.4F + 1.8 F).
Dust particle count will be: