Brookfield Dial Viscometer - Manual (Page 24)

Brookfield Engineering Laboratories, Inc. Page 24 Manual No. M/85-150-P700
Calibration Procedure for a Thermosel System
When a Thermosel System is used, the controller stabilizes the Thermo Container at the test temperature.
1) Put the proper amount of HT viscosity standard fluid into the HT-2 sample chamber. The
amount varies with the spindle used. (Refer to the Thermosel instruction manual).
2) Place the sample chamber into the Thermo Container.
3) Put the spindle into the test fluid and attach the extension link, coupling nut and free hanging
spindle (or directly attach the solid shaft spindle) to the DV-II+.
4) Allow 30 minutes for the viscosity standard, sample chamber and spindle to reach test
temperature.
5) Measure the viscosity and record the Viscometer reading.
Note: The spindle must rotate at least five (5) times before a viscosity reading is taken.
Calibration Procedure using UL or DIN Adapters
When a UL or DIN Adapter is used, the water bath is stabilized at the proper temperature:
1) Put the proper amount of viscosity standard fluid into the UL Tube. (Refer to the UL Adapter
instruction manual).
2) Attach the spindle (with extension link and coupling nut) onto the Viscometer.
3) Attach the tube to the mounting channel.
4) Lower the tube into the water bath reservoir, or if using the ULA-40Y water jacket, connect the
inlet/outlets to the bath external circulating pump.
5) Allow 30 minutes for the viscosity standard, sample chamber and spindle to reach test
temperature.
6) Measure the viscosity and record the Viscometer reading.
Note: The spindle must rotate at least five (5) times before a viscosity reading is taken.
Calibration Procedure using a Helipath Stand and T-Bar Spindles
T-Bar spindles should not be used for verifying calibration of the Viscometer.
Calibration Procedure for Spiral Adapter
1) Place the viscosity standard fluid (in the proper container) into the water bath.
2) Attach the spindle to the viscometer. Attach chamber (SA-1Y) and clamp to the viscometer.
3) Lower the viscometer into measurement position. Operate the viscometer at 50 or 60 RPM until
the chamber is fully flooded.
4) The viscosity standard fluid, together with the spindle, should be immersed in the bath for a
minimum of 1 hour, stirring the fluid periodically (operate at 50 or 60 RPM periodically), prior
to taking measurements.