AR 2000 Operator's Manual
47
If the system has been set up according to the instructions, the rheometer should now be ready to use. However,
we recommend that you follow a few extra precautions, described on the next several pages.
• If you are planning to start your experiment at a high temperature, preheat the system by lowering the
head to the measurement gap and allowing upper and lower geometries to rise to the set temperature.
• When you use the cone and plate or parallel plate geometries, it is important to use the correct sample
volume. The Rheology Advantage™ software calculates the exact volume required based upon the gap
size and geometry diameter. If you know the density of the sample, you can weigh out the correct amount
of sample. If you underfill or overfill the gap, you can cause experimental errors in your data.
• When you use the parallel plates, make sure that the oven thermocouple is not touching the plates.
• When you use the parallel plates, if you find that the lower plate is difficult to remove, make sure that you
apply a twist to the lower mounting plate—do not apply any force to the ceramic part of the geometry.
Figure 5.25
ETC Connections with Nitrogen
Figure 5.24
ETC Connections with LN2
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