Decagon Devices Pawkit - Page 4

Pawkit
Table of Contents
ii
Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . .27
Disassembly . . . . . . . . . . . . . . . . . . . . . . 27
Sensor Filter Cleaning/Replacement. . . 30
Chamber Cleaning Instructions . . . . . . . . 31
Battery Replacement . . . . . . . . . . . . . . . 32
5. Repair Instructions . . . . . . . . . . . . . . . .36
Shipping Directions . . . . . . . . . . . . . . . . . . .36
Repair Costs . . . . . . . . . . . . . . . . . . . . . . . . .37
6. Theory: Water Activity
in Products . . . . . . . . . . . . . . . . . . . . . . . .38
Water content . . . . . . . . . . . . . . . . . . . . . . .38
Water activity . . . . . . . . . . . . . . . . . . . . . . .39
Effect of Temperature
on water activity . . . . . . . . . . . . . . . . . . . . . 41
Water Potential . . . . . . . . . . . . . . . . . . . . . .42
Factors in determining
Water Potential . . . . . . . . . . . . . . . . . . . . . .42
Sorption Isotherms—relating aw
to water content . . . . . . . . . . . . . . . . . . . . .44
7. Further Reading . . . . . . . . . . . . . . . . . . .47
Water Activity Theory
and Measurement . . . . . . . . . . . . . . . . . . . .47
Food Quality and Safety . . . . . . . . . . . . . .48
Water Activity and Microbiology . . . . . .49
Water Activity in Foods . . . . . . . . . . . . . . .50
Pharmaceuticals/Cosmetics . . . . . . . . . . . .54
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . .55
Declaration of Conformity. . . . . . . . . . .57