Humidity Calibration Instrument

FIG. 1 is a top perspective view of a humidity calibration instrument showing my new design;

FIG. 2 is a bottom perspective view of the humidity calibration instrument in FIG. 1 ;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side thereof;

FIG. 7 is a front view thereof; and,

FIG. 8 is a back view thereof.

Broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.