Standard “G” Series Oils - Gardco EZ ZAHN Dip Viscosity Cup Series Instruction Manual

Warning: Silicone fluids should not be used to calibrate viscosity cups. These materials change the interface between the cup surface and the test
material and therefore change the cup calibration. The following is taken from ASTM D445: Viscometers used for silicone fluids should be reserved for
the exclusive use of such fluids. Solvent washings from these viscometers should not be used for cleaning other viscometers.
Gardco produced viscosity cups are calibrated with standard "G" series oils. These standard calibration oils
prepared expressly by the Cannon Instrument Company for the Paul N. Gardner company are produced with
an ISO 9001 certified Quality Management System, comply with the requirements and guidance of ISO 17034
and the quality control is done from an ISO/IEC 17025 accredited laboratory.
Centistokes viscosity of these oils is traceable to the National Institute of Standards and Technology.
These oils are available from the Paul N. Gardner company.
Shown in the graph is the viscosity cup number and the standard "G" oil used for its calibration. Normally,
cup calibration is at 25 degrees Celsius, shown on the graph by bold lines intersecting with the curve in the
circle. Graphs for all cups in the EZ series are included with each cup sold by Paul N. Gardner company.
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F
F
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U
X
Viscosity of most liquids, including the standard oils, are dependent on temperature. Effl ux time in seconds
for the indicated cup-oil combination from twenty (20) to twenty seven (27) degrees Celsius is shown in the
graph. The cup may be checked with the indicated "G" oil with reasonable accuracy within these limits. For
best accuracy, the temperature of the standard oil should be 25°C. The standard oil value in centistokes is
printed on the standard oil bottle label. Conversion from viscosity to effl ux time in seconds is by formula or
table which defi nes the characteristics of the cup. The applicable formula and table are furnished with each
cup by the Paul N. Gardner Company and authorized distributors.
STANDARD "G" SERIES OILS
Paul N. Gardner • www.gardco.com • (954) 946-9454
G-60
VISCOSITY
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