Example Of Viscosity Cup Calibration Check Sheet - Gardco EZ ZAHN Dip Viscosity Cup Series Instruction Manual

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Table Of Contents

Table of Contents

VISCOSITY

DATE

7/31/17

CUP NAME

CUP RING TAG SERIAL NO.

STATED TOLERANCE

CERTIFIED OIL DATA

CALIBRATION OIL NO. G60

LABEL DUE DATE

DATE OIL FIRST USED ** 7/31/17

CENTISTOKE VISCOSITY ON LABEL

CALIBRATION DATA *

RUN NO. 1

RUN NO. 2

DESIGN EFFLUX TIME (FROM GARDCO CONVERSION GRID CHART)

IN TOLERANCE ( √ ) OUT OF TOLERANCE ( )

CORRECTION FACTOR

CALIBRATED BY

When many different determinations are to be made on similar products in the same viscosity range, it may be helpful to produce a

graph for converting measured temperature and viscosity cup efﬂ ux time in seconds to seconds at a speciﬁ ed temperature, normally

25.0° C (77.0°F). Refer to "Temperature" in Viscosity Cup leaﬂ et in this manual for a suggested method of preparation for such a graph.

When ﬁ nished with standard oil examine it for contamination of any kind. A ﬁ ne wire mesh ﬁ lter may be used if dirt specks are noticed.

If oil is accidently contaminated with water settled in bottom of tumbler, pour off clean portion of oil and discard contaminated water

portion. Pour oil back into bottle and record the date of ﬁ rst use on the label. Stored in normal ambient temperature the oil is good

for a year after date of ﬁ rst use, provided it does not become contaminated.

Guide for removing the G-series calibrating oil from Gardco viscosity cups

Any remaining material in the cup must be removed by ﬂ ushing with a suitable solvent. Light naphtha,

heptane, octane, highly aromatic solvents, and or any other petroleum-derived hydrocarbon solvent can

be used. Varsol® is a commercial solvent that works very well for this purpose. Completely dry the viscos-

ity cup with a lint free cloth. Use a highly volatile solvent for a second cleaning as since any remaining

hydrocarbon solvents from the ﬁ rst process will evaporate quickly after the sample has been ﬂ ushed from

the cup. Hypersolve, MEK and Alcohol can be used in aluminum cups and Hypersolve and Alcohol for the

stainless steel cups. Acetone is commonly used as the second solvent because of its high volatility and its

ability to dissolve traces of petroleum solvents and water. In the third process a low velocity stream of clean

air will be sufﬁ cient to evaporate remaining traces of any volatile solvent. Be aware, avoid rapid evapora-

tion of these solvents as this can cool the surface to such an extent that humid air may be brought below

the dew point, causing a ﬁ lm of water to form on the cup.

Varsol is a registered trademark of the Exxon Company

A point of caution: Even the standard oils change in viscosity in the range of 3% - 8% per degree Celsius

at the 25° normal measuring range. Temperature of products being measured should be adjusted to within

0.1° of speciﬁ ed temperature if accurate results are to be obtained.

The information contained herein, or supplied by us or on our behalf in any other manner is based on data obtained by

our own research and is considered accurate. However, NO WARRANTY IS EXPRESSED OR IMPLIED REGARDING

THE ACCURACY OF THESE DATA, THE RESULTS TO BE OBTAINED FROM THE USE THEREOF, OR THAT ANY

SUCH USE WILL NOT INFRINGE ANY PATENT. This information is furnished upon the condition that the person

receiving it shall make his own tests to determine the suitability thereof for his particular purpose.