Shimadzu AP124X - X84; Solid Specific Gravity, Liquid Density Calculation Formulas

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77 ApplicationsApplications
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Solid specic gravity, liquid density calculation formulas
The [Air Buoyancy Correction Setting] function is included in software versions 1.01.28 and
later, and 1.01.I.01 and later. The [Air Buoyancy Correction Setting] function is not included in
versions older than 1.01.28 or 1.01.I.01.
Refer to the following for details on how to verify the software version.
^ [Software Version Verification Method] (P.26)
The AP Series can use two formulas for both solid specific gravity measurement and liquid density measurement.
The following two formulas can be used in specific gravity measurement.
(1) Formula where the effect of buoyancy resulting from air density is used to find solid specific gravity
(2) Formula where the effect of buoyancy resulting from air density is not used to find solid density
The following two formulas can be used in liquid density measurement.
(3) Formula where the effect of buoyancy resulting from air density is used to find liquid density
(4) Formula where the effect of buoyancy resulting from air density is not used to find liquid density
Formulas (2) and (4) above can be used to find the same specific gravity results as the AU Series.
Formulas (1) and (3) above are the default settings.
Differences in Specific Gravity Measurement between the AP Series and AU Series
Specific gravity measurement in the AP Series and AU Series differs in the following two ways.
1. Physical quantities found (specific gravity measurement and density measure-
ment)
The AU Series calculates solid density, while the AP Series calculates “solid specific gravity” (specific gravity divided by
the density of the medium liquid). (The AP Series can calculate solid density by setting the Air Buoyancy Correction at
OFF.) Both series calculate the same physical quantities for liquid density.
2. Effect of buoyance resulting from air density
The AP Series can calculate using the effect of buoyance resulting from air density (0.0012 g/cm
3
), however the AU
Series cannot calculate using the effect of buoyance resulting from air density.
Differences in formulas between when the AP Series Air Buoyancy Correction Setting is ON and OFF are compiled in a
table. The table also lists the differences between the AP Series with software version earlier than 1.01.28 or 1.01.I.01
and AU Series. ^[“Air Buoyancy Correction” Setting] (P.98).
Precautions