Operation and calibration procedures of viscometer

Operation  and calibration  procedures of viscometer

Operation and calibration procedures of viscometer.


Plugin the instrument

Start the instrument by pressing the ON/OFF button on the back panel

The following is displayed: REMOVE SPINDLE




Remove the spindle and press any key.

The following is displayed: REPLACE SPINDLE




  • Joint the required spindle and press any the key.
  •  Select the spindle press the SELECT SPINDLE key and set the spindle No. using ↑ and ↓ keys. Press the SELECT SPINDLE key again.
  •  Select the rotation speed by pressing the SET SPEED key and setting the rotation speed using ↑ and ↓ keys. Press the SET SPEED key again.
  •  Measurement procedure
  •  Immerse the spindle and the thermal sensor into the test solution. Avoid the formation of air bubbles on the spindle surface.
  • push the MOTOR ON/OFF/ESCAPE button to initiate the analysis.
  • The regulations of the spindle and rotation pace selection
  • The spindle size is inversely proportional to the viscosity of the solution (use a smaller spindle for more viscous solutions).
  • Rotation speed is inversely proportional to the viscosity of the solution.
  • The result is reliable if the viscosity value is 10-100 % (this value is displayed).
  •  Wait till the value displayed stabilizes.
  • Switch off the instrument pressing the MOTOR ON/OFF/ESCAPE button.
  •  Calibration procedure
  • Place the viscosity reference fluid in the water bath.
  • Lower the DV-II+Pro into measurement position (with guard leg if LV or RV series Viscometer is used).
  • Attach the spindle to the Viscometer.
  • Be make certain If you are the usage of a disk-shaped spindle, to keep away from trapping air bubbles below the disk through first immersing the spindle at an angle, and then it connecting it to the Viscometer.
  • The viscosity reference fluid with the spindle should be immersed in the bath for a minimum of one hour, stirring the fluid continuously, before taking measurements.
  • After one hour, check the temperature of the viscosity reference fluid with an appropriate thermometer.
  • Be ensure if the fluid is at test temperature (±0.1°C of the temperature, normally 25°C), measure the viscosity, and record the Viscometer reading.

Note: Before recording the readings spindle should be rotating at least five (5) times.

  •  The viscosity reading should equal the cP (mPa·s) value, mentioned for standard fluid with a deviation within the accuracy of the viscosimeter (±1%)
  •  Calibration frequency: once in three months.
  •  Maintenance and safety instructions
  • Clean the instrument before and after exploitation.
  • Clean the spindle with the tissue dampened with solvent.

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About ABHA

Abha is the Author  of pharmaceutical guidance, she is a pharmaceutical professional having more than 22 years of rich experience in pharmaceutical field. During her career, she works in the quality assurance department with multinational companies i.e Zydus Cadila Ltd, Unichem Laboratories Ltd, Indoco remedies Ltd. During his experience, she faces many regulatorily audits i.e. USFDA, MHRA, ANVISA, MCC, TGA, EU –GMP, WHO –Geneva, ISO 9001-2008 and many ROW Regularities Audit i.e.Uganda, Kenya, Tanzania, Zimbabwe. She is currently leading a regulatory pharmaceutical company as a Head Quality. You can join him by Email, Facebook, Google+, Twitter, and YouTube

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