OfiTE 800 - Calibration Procedure

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Procedure:
1. Choose the certied calibration uid using the temperature-viscosity chart
supplied with the calibration uid to cover the viscosity range of interest.
Make sure the lot number on the chart matches the lot number on the
uid container. Each lot of standard uid is individually certied. The
viscosity will normally vary slightly from lot to lot.
2. Clean and dry the viscometer bob, sleeve, and cup. Place the viscometer
and the calibration uid side-by-side on the counter top in a room
with a reasonably constant temperature (variation of less than 5°F ±
2.5°F). Allow the viscometer and the uid to stand at least two hours to
equilibrate.
3. Operate the viscometer in air for two to four minutes to loosen up the
bearings and gears. Observe the rotor sleeve for excessive wobbling and
replace if necessary.
4. Fill the cup to the scribed line with calibration uid and place it on the
viscometer stage. Move the stage upward until the uid level is to the ll
line on the sleeve.
Never immerse the sleeve in uids above the ll line.
Fill Line
Viscometer Sleeve
5. Place a thermometer capable of ± 0.2°F (0.1°C) into the uid and hold
or tape it in place to prevent breakage. Operate the viscometer at a low
speed setting until the thermometer reading becomes stable to within ±
0.2°F (0.1°C) per 30 seconds. Note and record the temperature reading.
6. Once the temperature has stabilized, operate the viscometer at 600 RPM
and then at 300 RPM. Note and record the dial readings to the nearest
0.5 dial unit.