Brookfield viscometer calibration

Rahul Kashyap
2

Purpose:
The purpose of this SOP is to provide written guidelines for Calibration of Brook Field
Viscometer.
Procedure:
Frequency: Quarterly

  • Put the standard of 5 cps silicon fluid in a beaker, ensuring the level of spindle Up to groove.
  • Put the thermo-sensor in the sample.
  • Ensure the temp. of fluid is 250 C
  • Measure the viscosity at 100 RPM
  • Take two readings in cps to obtain average viscosity.
  • After finishing the work, the beaker should be thoroughly washed with distilled water.
  • Acceptance criteria: 5 cps + 1.0 % i .e.
  • Limit: 4.95 to 5.05 cps
  • Maintenance / Repairs:
  • When the instrument does not comply with the Acceptance criteria specified above, the instrument should be labeled “ out of calibration “ and should be repaired / serviced.

Precautions: 
  • Remove the Ultra Low adaptor (U. L.) & carefully clean the spindle using distilled water.  
  • Ensure that the spindle or any other part of the instrument is handled with 
  • extreme caution & the surfaces are not scratched as it can  disturb the calibration 
  • of the  instrument.
  • Maintain the cleanliness of instrument before & after use at each time.


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