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A hand-held electronic instrument including a unitary, sleeve-shaped housing having a battery compartment and an electronics compartment housing a microcomputer. A sensing probe and a probe mounting member are removably mounted and fluidically sealed to the front end portion of the housing. A batter

A hand-held electronic instrument including a unitary, sleeve-shaped housing having a battery compartment and an electronics compartment housing a microcomputer. A sensing probe and a probe mounting member are removably mounted and fluidically sealed to the front end portion of the housing. A battery door assembly fluidically seals the rear end portion of the housing and is removable to provide access to the battery compartment for replacing spent batteries. A latch pin extending laterally from the latch operator of the battery door assembly engages a partition on the housing to retain the assembly to the housing. A battery polarizing plate disposed intermediate the battery and the electrical contacts for the battery ensure that the proper polarity is applied. Software stored in the microcomputer includes a calibration routine for facilitating calibration of the instrument and an energy savings routine for extending the life of the battery.

대표청구항 ▼

[ What is claimed is:] [1.] A hand-held electronic instrument for measuring an environmental parameter comprising:a housing having oppositely disposed front and rear end portions and a top panel, the housing defining a battery compartment and an electronics compartment adjacent the battery compartme

[ What is claimed is:] [1.] A hand-held electronic instrument for measuring an environmental parameter comprising:a housing having oppositely disposed front and rear end portions and a top panel, the housing defining a battery compartment and an electronics compartment adjacent the battery compartment;an electronic assembly disposed within said electronics compartment of said housing including a microcomputer comprising a memory for storing a software program and data, said battery compartment facilitating electrical communication between a battery disposed therein and said electronic assembly for providing polarized electrical power to said electronic assembly;a control pad mounted to said top panel of said housing for controlling the operation of said electronic assembly;a front endcap mounted to said front end portion of said housing and fluidically sealed thereto;a probe mounting member removably mounted to said front endcap and fluidically sealed thereto;a sensing probe mounted to said probe mounting member, said sensing probe being in electrical communication with said electronic assembly; anda battery door assembly removably mounted and fluidically sealed to said rear end portion of said housing for providing access to said battery compartment.