Calibration of Brookfield Viscometer

PROCEDURE

• Ensure that all the connections of the instrument are proper.
• Turn the viscometer ON.
• Take out the viscosity standard solutions in 500 ml beaker, adjust the temperature to 250C. Attach the required spindle, adjust required speed & measure the viscosity, note down the constant reading.
• Viscosity standards, speeds, spindles required & tolerance limits are as follows:

Sr. No.	Viscosity of standard in cps	Actual viscosity of standard in cps	Spindle No.	Entry Code	RPM	Tolerance (in cps)
						Minimum	Maximum
1.	5.00	4.70	ULA	00	60	4.55	4.85
2.	50.00	48.40	LV1	61	60	46.9	49.9
3.	5000.00	4820.00	LV3	63	10	4651.83	4988.17

Acceptance criteria

• Viscosity should be within the tolerance limits.
• Do not transfer the viscosity solution to the original container back after use.

Precautions

• Take due care to avoid any contamination of the standard solutions.
• Avoid air bubble entrapment during transfer of standard solutions.

Frequency

Once in 6 months.

QUALITY ASSURANCE DEPARTMENT

CALIBRATION REPORT OF BROOKFIELD VISCOMETER

Reference –					Date -
Frequency - Once in 6 Months					Instrument No. -
Make – Brookfield Engineering Laboratories, Inc.					Model – LVDV-II + Pro
Take out the viscosity standard solutions in 500 ml beaker, adjust the temperature to 250C & attach the required spindle, adjust required speed & measure the viscosity, note down the constant reading.
Sr. No.	Viscosity Std. in CPS	Actual Viscosity of Std. in CPS	Observed Viscosity in CPS			Tolerance (in CPS)			Remark (S / NS)
						Minimum	Maximum
1	5.00	4.70				4.55	4.85
2	50.00	48.40				46.9	49.9
3	5000.00	4820.00				4651.83	4988.17
Conclusion : Calibration is satisfactory (S) / not satisfactory (NS).
Next Calibration Due On :
Done By : Date :				Checked By : Date :

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