Brookfield RST Rheometer - Manual (Page 52)

Brookfield Engineering Labs., Inc. page 52 Manual No. M14-223
IV.2.1 Measurement with Manual Gap Adjustment (MGA)
You can carry out measurements after you adjust the gap. Adjust the gap using the procedure in
Appendix B.
Set the temperature control (e.g. bath/circulator or peltier temperature control) to the required temperature
if measurements are to be taken under controlled temperature. The pre-heating time depends on the
sample, on the required temperature and on the measurement system.
Place the sample material on the bottom plate with the instrument head in the upper position (for filling
quantity see Appendix E “Data Sheets for Standard Measuring Systems”). Air bubbles in the sample will
affect test results and should be avoided.
Attach the spindle. Lower the measuring head using the lever. To avoid interfering side effects, remove
excess sample from around the cone or plate with the provided spatula, taking care not to scratch the
surface of the bottom plate. Remove excess sample from cone or plate edge. Do not begin the
measurement until the temperature in the substance has stabalized at set point.
Now the measurement can begin.
Caution!
Temperature Control
The measuring cone/plate may only be adjusted, and the hexagon socket screw may only be
tightened, when the measuring temperature is set precisely, otherwise the gap distances
may be changed by thermal elongation resulting in faulty measurement or in damage to the
measuring system.
Danger!
Operation
Take caution with measurements at high temperature! Always check the temperature before
removing the cone or plate to avoid burned fingers!
IV.2.2 Measurement with Manual Gap Adjustment (MGA)
You can carry out measurements after you adjust the gap. Adjust the gap using the following procedure in
Appendix B. Follow the sample procedure for making measurements as defined in the preceding section.