5
1.2
For More Precise Measurements
To be able to conduct more precise measurements, it is necessary to minimize the factors that
contribute to measurement errors. There are a great variety of such error-inducting factors, which can
be linked to machine error and performance of the balance itself, as well as the properties and
condition of samples being measured, and the measuring environment (e.g., vibration,
temperature/humidity). These factors can readily affect the results of measurement on a balance that
has high resolution readability.
This material includes some precautionary notes that the user should bear in mind to eliminate
error factors and ensure accurate measurement results.
1-2-1 Precautions on the Measuring Room
Temperature /
Humidity
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Try to maintain constant room temperature as much as possible to
prevent dew condensation and unstable indications due to
fluctuations in temperature.
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Low relative humidity tends to induce static electricity,causing
measurement error. (Relative humidity of about 60% is considered
ideal.)
Vibration/
Shaking
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The measuring room should preferably be located on the ground
floor or in the basement. Higher floors are more susceptible to
heavy vibration and shaking, which make such locations less
suitable for measurement. A room facing a railway or road with
heavy traffic should also be avoided as much as practicable.
Drafts
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Avoid choosing a location subject to a direct draft of airflow from an
air-conditioning unit or exposed to direct sunlight, which may cause
unstable reading due to abrupt fluctuations in temperature.
Also avoid a room subject to a heavy flow of people, since
fluctuations in drafts and temperature are likely to occur in such a
location.
Gravity
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The gravity acting on a sample varies depending on the latitude or
height of the location where measurement is being conducted. For
this reason, the same sample may show different weight indications
from one place to another.
Therefore, make it a rule to calibrate the balance every time it is
relocated.
Electromagnetic
Waves
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When the balance is located near an object that generates intense
electromagnetic waves, it may be hindered from showing accurate
weight due to the effects of such waves. Therefore, avoid placing
the balance in such a location.
Summary of Contents for AJ-NT/DBNT Series
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