Quality Assurance in the laboratory with PSL-Rheotek viscosity oil standards
A viscosity standard is a bottle of mineral oil with certified values in viscosity and density. When you run an oil viscosity standard, you know exactly which result you are looking for. The quality manual will specify how often the viscometers need to be validated. If your results are outside of tolerance, you will need to replace the viscometer or send it in for recalibration. When using a glass viscometer, it is good practice to use oil viscosity standards to check that you are getting the right numbers. This validation is good practice for ongoing quality assurance.
Comparing your result to the certified values on the bottle will give you the information needed to pass an upcoming audit. In between audits, the verification with an oil viscosity standard provides peace of mind.
Why choose PSL-Rheotek viscosity standards?
The PSL Calibration Laboratory is accredited to ISO 17025 for calibration work in viscosity and temperature by UKAS (United Kingdom Accreditation Service), Lab No 0247. The PSL Calibration Laboratory maintains a master viscometer scale calibrated to ASTM D2162. Manufacturing and handling of reference materials is certified under ISO 17034, Lab No 5076. Calibrations performed include the measurement of Viscosity Reference Standards in the temperature range -40 to 135 deg. C.
How to find the right viscosity standard
The most reliable verification is obtained by choosing an oil viscosity standard with a nominal value close to your production samples.
PSL Viscosity Reference Standards are suitable for the verification and calibration of glass capillary viscometers, flow cups, rotational viscometers & Cone and Plate viscometers. Oil viscosity standards cover the entire viscosity range. For instructions on how to conduct the calibration, please refer to the procedure in ASTM D445 or ISO 3104.
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