Brookfield RST Rheometer - Manual (Page 49)

Brookfield Engineering Labs., Inc. page 49 Manual No. M14-223
IV.1.1 Measurement Directly in the Sample
If necessary, remove the sample cup bottom from the measuring system and attach the thread guard.
Use caution with the Double Gap DG system:
• When using the measuring system MS3-DG, remove the packing ring from between the shell and
the inner part of the sample cup. For that purpose you open the measuring system at the bottom
and take the inner part out. Be careful not to damage or overstretch the packing ring when you
take it out. Place the inner part back inside and and screw down the measuring system.
Slide the coupling sleeve of the measuring bob coupling up (ring visible).
Insert the measuring bob into the coupling with caution. Be careful to insert the shaft of the measuring bob
into the coupling without bumping against it.
Slide the coupling sleeve of the measuring bob coupling down (ring hidden).
Fasten the sample cup to the sample cup flange seat using the threaded joint for the sample cup.
Immerse the sample cup in the substance as far as the ring mark or the conical
swelling, as the case may be, by lowering the stand.
Make sure that no sample or solvent whatsoever penetrates into the measuring
bob coupling, the measuring drive or the electronic unit.
Now the measurement can be carried out.
When the measurement is finished, first open the threaded joint of the sample
cup and remove the sample cup, then open the measuring bob coupling and
remove the measuring bob.
Clean sample cup and measuring bob carefully without using hard objects. Be sure to avoid scratches.
Store the measuring bob on a soft surface or in its original jar.
IV.1.2 Measurement with Sample in the Measuring System
Fill the sample cup with substance (for filling quantity, see Appendix E “Data Sheets for Standard
Measuring Systems”). Avoid trapping air bubbles when filling in the sample, as they would result in non-
repruducible or false data.
Insert the measuring bob into the sample cup. Slide the coupling sleeve of the measuring bob coupling up
(ring visible). Place the complete measuring system on the sample cup seat flange from below and fasten
it with the threaded joint for the sample cup. Be careful to insert the measuring bob shaft into the coupling
without bumping against it. Now insert the measuring bob shaft into the measuring bob coupling and slide
the coupling sleeve down (ring hidden).
For this type of measurement the sample temperature can be controlled by immersing the measuring
system in a suitable thermostat (deliverable as special accessory). In this case it is important to pay
attention to the depth of immersion.
Caution!
Temperature control
Temperature range max.: 0°C ... 90 °C!
The cooling device KE is needed for an extended temperature range of -20... 180°C.
Figure IV-1