Moisture meter, state diagnosis method for moisture meter, and program

Abstract

A moisture meter (100) is provided with: a mass measurement unit (2) for measuring the mass of a sample; a heating unit (3) that heats the sample; a control calculation unit (5) for controlling the heating unit (3) to heat until the mass change of the sample is equal to or less than a predetermined threshold value, and calculating the moisture content of the sample on the basis of the mass change of the sample before and after heating; and a storage unit (8). The control calculation unit (5) is provided with: a standard substance measurement unit (52a) that measures the moisture content multiple times using, as a sample, a standard substance for inspection that exhibits a fixed theoretical moisture content at any mass as a result of being heated at a predetermined temperature; a standard deviation calculation unit (52c) that calculates the standard deviation of the measured moisture content in a plurality of measurements; and a state diagnosis unit (52d) that compares the measured moisture content with the theoretical moisture content of the standard substance stored in the storage unit, evaluates the presence or absence of an abnormality in the quality measurement unit (2), and evaluates the influence of the installation environment by determining whether the standard deviation is equal to or less than a predetermined value.

Description

Technical field [0001] The present invention relates to a moisture meter, in more detail, to a heat-dried moisture meter. Background [0002] Previously, as one of the devices measuring the moisture of the specimen, it is known to have a heat-dried moisture meter (e.g., patent document 1). The heat-drying moisture meter measures the moisture rate of the specimen according to the change (decrease) in the quality of the specimen before and after heating by heating the sample material by heating the moisture in the sample. Below, in this instruction manual, as long as there is no special negative, the moisture meter refers to the heat-drying water meter. [0003] Patent document 1 discloses a moisture meter, which is constituted, using sodium tartarate dihydrate (C 4 H 4 Na 2 O 6 ·2H 2 O, hereinafter referred to as "sodium tartarate") and other substances with a pre-determined moisture rate are corrected as reference materials for device performance inspection. It is known that sodi...

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Problems solved by technology

[0005] On the other hand, in the field of weighing devices (especially electronic balances), it is known that sudden changes in temperature due to the operation of air conditioners, changes in air pressure and humidity due to the passage of low pressure, and occurrences due to remote earthquakes are known. The measurement value will be scattered due to the so-called noise that affects the installation environment of the etc.

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