Temperature and Materials
Additional
considerations for inserts, cups, filter caps and reference spheres.
•
Note that all reference sphere volumes are
certified at 20 °C.
•
All spheres are made of Tungsten Carbide (WC),
EXCEPT for the 51 cm3 reference used with the 100 cm3
nominal unit, which is made of Stainless Steel (SS).
•
All inserts and sample cups are Aluminum (Al),
unless otherwise specified.
•
There is an optional 10cm3 stainless
steel sample cup available for certain applications.
•
All filter caps are Stainless Steel (SS).
•
The Coefficient of Thermal Expansion (CTE) is
embedded in the software for these materials and automatically adjusts volumes
for verification, calibration, cup measurements and insert measurements.
•
If the cup or insert is measured at 20 °C, the
cup or insert can be used at other temperatures without need to measure at
the analysis temperature.
•
If using the stainless steel cap with the
aluminum cup, the cup plus cap volume would need to be measured at the
analysis temperature since they are of different materials.
•
If verifying volume using cups and
reference spheres using a sample method at a temperature other than 20 °C, the
reference volume needs to be manually corrected and compared to the measured
value. The calculations are in the AccuPyc III Operator's Manual.