GG-T-356B
6.1 Intended use. The organic liquid-in-glass, low temperature, complete immersion
thermometers covered by this specification are intended for use in the measurement of minimum
temperatures for meteorological purposes.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of this specification.
b. Class and Type or temperature range of thermometer (see 1.2).
c. Set point for the expansion chamber: 57 °C (135 °F) or 71 °C (160 °F) (see 3.4.2).
d. Stem markings. The symbol of the procuring agency and the starting serial number. (Example
Defense General Supply Center Richmond will be DSCR-Serial No.----). (See 3.4.3).
e. Unit quantity required.
f. Whether a first article is required (see 3.1).
g. Packaging requirements (see 5).
6.3 Definitions.
a. Bulb: The reservoir for the thermometer liquid. The bulb of a thermometer will contain a
volume equivalent to a specific number of degrees of the scale depending on the coefficient
of expansion of the thermometric liquid and bulb glass.
b. Stem: The glass capillary tube through which the thermometric liquid advances or
retreats with changes in temperature.
c. Scale: The scale graduated in degrees or multiples or submultiples of degrees.
d. Expansion chamber: An enlargement at the top end of the capillary bore having a volume
equivalent to not less than the volume of a 20 mm length of unchanged capillary. Smaller
chambers are not regarded as expansion chambers.
e. Complete immersion thermometer: A thermometer designed to indicate temperatures
correctly when the whole thermometer, including expansion chamber, is subjected to the
temperature being measured.
6.4 Part identification number (PIN). The following part identification numbering procedure is
for government purposes and does not constitute a requirement for the contractor.
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