VISCOSITY
16
DATE
7/31/17
CUP NAME
GARDCO EZ™ Zahn (ASTM)
CUP NO.
2
CUP RING TAG SERIAL NO.
44263
STATED TOLERANCE
± 3%
CERTIFIED OIL DATA
CALIBRATION OIL NO.
G60
LOT NO.
90102
LABEL DUE DATE
5/ 30/17
DATE OIL FIRST USED **
7/31/17
CENTISTOKE VISCOSITY ON LABEL 118.4 CS
CALIBRATION DATA
*
RUN NO. 1
47.53
SECS @ 25.0°C RUN NO.3
47.65
SECS @ 25.0°C
RUN NO. 2
47.63
SECS @ 25.0°C
AVERAGE
47.60
SECS @ 25.0°C
DESIGN EFFLUX TIME (FROM GARDCO CONVERSION GRID CHART)
47.86
SECS @ 25.0°C
IN TOLERANCE (
√
) OUT OF TOLERANCE ( )
CORRECTION FACTOR
1.005
CALIBRATED BY
A.B. Smith
CHECKED BY
L.A. Dawn
(Only For Cups Made By GARDCO)
**
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.
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.
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 speci
fi
ed temperature if accurate results are to be obtained.
CAUTION
CLEANING VISCOSITY CUPS AFTER USE
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 suf
fi
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
EXAMPLE OF VISCOSITY CUP CALIBRATION CHECK SHEET
Paul N. Gardner • www.gardco.com • (954) 946-9454
