Brookfield DV-II+ Programmable Viscometer Uživatelský manuál stáhnout pdf (Strana 69)

Brookfield Engineering Labs., Inc. Page 69 Manual No. M/97-164-F1 102

❏ Inaccurate Readings

✓ Verify spindle, speed and model selection.

✓ If % readings are under-range (less than 10%), the display will flash; change spindle and/or

speed.

✓ “

EEE” on the digital display means the unit is over-range (greater than 100%); reduce speed

and/or change spindle.

✓ Verify test parameters: temperature, container, volume, method. Refer to:

•“More Solutions to Sticky Problems”, Section III

•“DV-II+ Programmable Viscometer Operating Instructions, Appendix C, “Variables in

Viscosity Measurements.

✓ Perform a calibration check; follow the instructions in Appendix E.

✓ Verify tolerances are calculated correctly.

✓ Verify the calibration check procedures were followed exactly.

If the unit is found to be out of tolerance, the unit may be in need of service. See Appendix K for

details on “How to Return Your Viscometer”.

❏ Viscometer Will Not Return to Zero

✓ Viscometer is not level

• Check with spindle out of the sample

• Adjust the laboratory stand

✓ Pivot point or jewel bearing faulty

• Perform calibration check

• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair

❏ Display Reading Will Not Stabilize

✓ Special characteristic of sample fluid. There is no problem with the viscometer.

• Refer to Appendix C

✓ Check for erratic spindle rotation.

• Verify power supply

• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair

✓ Bent spindle or spindle coupling.

• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair

✓ Temperature fluctuation in sample fluid

• Use temperature bath control.

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Brookfield DV-II+ Programmable Viscometer Uživatelský manuál Strana 69