Operation and calibration procedures of viscometer
Operation and calibration procedures of viscometer.
PROCEDURE
Plugin the instrument
Start the instrument by pressing the ON/OFF button on the back panel
The following is displayed: REMOVE SPINDLE
PRESS ANY KEY
REMOVE SPINDLE
PRESS ANY KEY
Remove the spindle and press any key.
The following is displayed: REPLACE SPINDLE
PRESS ANY KEY
REPLACE SPINDLE
PRESS ANY KEY
- 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.
