Appendix C - Calibration Check - Ametek BROOKFIELD RST Operating Instructions Manual

Appendix C - Calibration Check

The calibration check procedure is performed in order to verify that your RST Rheometer is making
correct viscosity measurements. It can be done in standalone mode or under control of Rheo-3000
software. Perform the calibration check with the spindle that is most frequently used with your instrument.
You do not need to perform a calibration check with additional spindles unless there is a concern that
a specific spindle is not measuring properly.
The calibration check can be performed at regularly scheduled time intervals determined by you
(before each shift, weekly, monthly, etc.) or at any time when there is concern that the instrument is
not measuring correctly.
Before performing the calibration check, it is advisable to perform the Zeroing procedure. This feature
is accessed in the Settings menu in standalone mode. At a minimum run both the High Range and Low
Range Zeroing procedures. The time required to do both is slightly more than a half hour.
Use the appropriate viscosity standard for the spindle that you want to test. Consult the following table,
which shows the fluid that is recommended for each type of spindle and the required sample volume
to perform the calibration check:
Coaxial Spindles
CCT-8
CCT-14
CCT-25
CCT-40
CCT-DG
If you have an RS-SST Rheometer and use vane spindles, Brookfield recommends that you perform
a calibration check with either the CCT-40 or CCT-25 Coaxial Spindles and the associated chamber,
which will also attach to your instrument.
You will also need a circulating temperature bath to condition the viscosity standard to a set temperature,
normally 25°C. All Brookfield viscosity standards are calibrated at 25°C. Additional temperature
calibrations are available upon request when the fluid is ordered from AMETEK Brookfield or an
authorized dealer.
AMETEK Brookfield
Cone Spindles
RCT-25-1
RCT-25-2
RCT-50-1
RCT-50-2
RCT-75-1
RCT-75-2
Fluid
B360000
B73000
B21000
B2000
B200
Fluid Sample Volume
B41000 0.1mL
B73000 0.2mL
B10200 1.0mL
B21000 2.0mL
B4900 2.5mL
B10200 5.0mL
Sample Volume
Do Not Perform Calibration Checks
with this Spindle!
Do Not Perform Calibration Checks
with this Spindle!
16.8mL
68.5mL
15.7mL
Page 94 Manual No. M14-223-B0818