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| S90 ZAHN Signature Series Dip Cup |
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| All Stainless Steel Calibrated Viscosity Cup |
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- S90 Zahn Signature Dip Viscosity cups are an improved version of the time honored Zahn Signature viscosity cups. GARDCO is the only producer authorized to use the Zahn name and has added the S90 designation to identify the improved viscosity cups manufactured on new state-of-the-art equipment to insure optimum quality and uniformity.
- Calibration of the S90 Zahn cups match the earlier Zahn Signature cups.
- Conversion formulas and tables relating cup efflux time in seconds to viscosity in centistokes are identical for both series of cups.
- S90 Zahn cups qualify for certification under ANSI/NCSL Z540 or ISO/IEC 17025, ISO 9001, as applicable.
- S90 Zahn cups are calibrated with standard "G" series oils traceable to the National Institute of Standards & Technology.
- "G" series calibration oils are produced in accordance with ISO 9002.
- NOTE: Efflux time from these cups does not meet ASTM specifications. Tables are available for converting S90 Zahn cup efflux time to EZ™ Zahn cup efflux time which complies with ASTM D4212.
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Features
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- Cup flow characteristics are defined by a mathematical formula and standard “G” series oils.
- Furnished with each S90 Zahn cup is a conversion table relating cup efflux time to the nearest tenth of a
second to viscosity in centistokes.
- S90 Zahn cups, with the above advantages, cannot be confused with other, lesser defined cups as they are
produced, calibrated and sold only by Paul N. Gardner Company and authorized dealers.
- Ransom & Randolph recommends the S90 Zahn cups as the most reliable viscosity cups to measure and
control the consistency of ceramic shell slurries.
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Technical Data
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| Range Specification |
Item Number
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Cup No. |
Seconds Range |
Centistoke Range |
| VI-2101 |
1 |
31 to 60 |
15 to 78 |
| VI-2102 |
2 |
19 to 60 |
39 to 238 |
| VI-2103 |
3 |
11 to 60 |
63 to 604 |
| VI-2104 |
4 |
10 to 60 |
97 to 899 |
| VI-2105 |
5 |
10 to 60 |
219 to 1627 |
| Certificate of Calibration available at additional charge for all cups. |
| Conversion Formulas |
| Cup No. |
Efflux Time Seconds “T” from Centistokes “V” |
Centistokes “V” from Efflux Time in seconds “T” |
| 1 |
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| T = (V + |
√ |
V2 + 6805) |
÷ 3.18 |
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V = 1.59T - 1070 ÷ T |
| 2 |
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| T = (V + |
√ |
V2 +12707) |
÷ 8.36 |
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V = 4.18T - 760 ÷ T |
| 3 |
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| T = (V + |
√ |
V2 + 23529) |
÷ 20.46 |
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V = 10.23T - 575 ÷ T |
| 4 |
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| T = (V + |
√ |
V2 + 32983) |
÷ 30.26 |
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V = 15.13T - 545 ÷ T |
| 5 |
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| T = (V + |
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V2 + 58903) |
÷ 54.54 |
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V = 27.27T - 540 ÷ T |
| Note: Furnished with each cup is a conversion table for each tenth of a second within the cup range. |
| Standard“G” Series Calibrating Oils |
| Catalog Number |
Oil Number |
Use With Cup Number |
Nominal Centistokes* at 25°C., 77°F. |
| VI-3805 |
G-20 |
1 |
35 |
| VI-3815 |
G-60 |
2 |
120 |
| VI-3820 |
G-100 |
3 |
230 |
| VI-3825 |
G-350 |
4 and 5 |
880 |
| *Certified value is printed on container label. Note: A graph is furnished with each cup showing efflux time of the "G" oil
from 20 to 27 degrees Celsius. |
These standard oils prepared expressly by the Cannon Instrument Company for the Paul N. Gardner Company are produced in accordance with ISO/IEC 17025:2005, ISO/IEC Guide 34:2009, ISO 9001:2008.
Caution: 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. |
Conversion Table Between Efflux Time in Secs. and Centistokes
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Flow characteristics of S90 Zahn cups are accurately defined by mathematical formula relating cup efflux time to viscosity. The formula for each cup in the series is shown in the Conversion Formula table. For convenience, the formula for each cup has been solved for each tenth of a second within the normal cup range. Results are available in table form as shown greatly reduced at the left and are furnished with each cup. They are also available in sets for each cup in the series.
Use the table as follows: Assume an efflux time of 45.6 seconds. Read down the left column to the 45 line and then to the right on this line to the 0.6 column. The value at the intersection is 173.9 centistokes. The table may be read in reverse to find efflux time in seconds from a known centistoke value. |
Instructions For Use
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- Select the cup to be used from the Range Specification table.
- Insure that the cup is clean, especially around the orifice.
- Adjust temperature of the material to be tested, if necessary.
- Holding the cup by the ring, immerse it into the test material.
- Measure and record temperature of material encompassed by cup.
- Hold cup vertically by inserting index finger into handle ring. In a quick, steady motion, lift the cup out of the sample material, starting the timer when the top edge of the cup breaks the surface. During the flow time, hold the cup no more than 6” above the level of the sample material.
- Stop the timer when the first definite break in the stream at the base of the cup is observed.
- Record cup name, number and efflux time in seconds with temperature.
- Promptly clean the cup taking care not to abrade orifice. Use a length of nylon fishing line to clean the orifice.
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Care of Cup
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| GARDCO produced and calibrated S90 Zahn viscosity cups are made of stainless steel except for the name plate. These cups will give years of satisfactory service requiring only thorough cleaning following each use. Even so, it is good practice to periodically confirm cup calibration. This is easily done with use of appropriate “G” oil listed in the Calibrating Oils table. Centistoke label value of the oil is traceable to the National Institute of Standards and Technology. |
Cleaning Viscosity Cups After Use
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Guide for removing the G-series calibrating oil from Gardco viscosity cups.
Any remaining material in the cup must be removed by flushing 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 viscosity cup with a lint free cloth. Use a highly volatile solvent for a second cleaning
as since any remaining hydrocarbon solvents from the first process will evaporate quickly after the
sample has been flushed 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 sufficient to evaporate remaining traces of
any volatile solvent. Be aware, avoid rapid evaporation 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 film of water to form
on the cup.
Varsol is a registered trademark of the Exxon Company |
Notice To All S90 Zahn Viscosity Cup Users
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| S90 Zahn Signature Series Dip cups do not meet ASTM Specification D4212. Not all S90 Zahn Cups deviate from the standard by the same amount - the range being from near compliance to a variance exceeding a factor of two.
Manufacturing procedures include calibration with oils traceable to the National Institute of Standards and Technology. Certification with compliance to ANSI/NCSL Z540 or ISO/IEC 17025, ISO 9001, as applicable, is available. Tables are available which convert between S90 Zahn Signature and EZ™ cups of the same number, to the nearest tenth of a second, to assist those who need to work with both established standards. |
Accessories
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| Atkins Platinum RTD Thermometer and Probe System |
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- Long-term stability at high temperatures
- O-ring sealed housing makes instrument water resistant
- Measures -76°F to 500°F (-60°C to 260°C)
- Probe permanently attached by 29" high temperature wrap-around cable.
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| Technical Data |
| Resolution: |
0.1 degrees from -76.0°F to 199.9°F (-60.0°C to +93.3°C)
1.0 degrees from 200°F to 500°F |
| Range: |
-76°F to 500°F (-60°C to 260°C) |
| Accuracy: |
±0.5F° from -76.0°F to 199.9°F; ±1F° from 200°F to 500°F
(±0.3C° from -60.0°C to 93.3°C; ±1C° from 200°C to 260°C) |
| Battery Life: |
500 hours, 9VDC (400 μA current drain) / 10 hour lo batt indicator |
Ambient Temp:
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Operating: -10°C to 50°C / Storage: -25°C to 60°C |
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Prices
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Prices subject to change  Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only Export orders require quotations - click here for a quote For more info call us 1-800-762-2478 or 954-946-9454. |
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| Item Number |
Item |
Prices |
| VI-2101 |
No. 1 S90 Zahn Viscosity Cup (Each) with Conversion Chart |
$133.00 |
| VI-2101/C |
Certified No. 1 S90 Zahn Viscosity Cup (Each) with Conversion Chart |
298.00 |
| VI-2102 |
No. 2 S90 Zahn Viscosity Cup (Each) with Conversion Chart |
133.00 |
| VI-2102/C |
Certified No. 2 S90 Zahn Viscosity Cup (Each) with Conversion Chart |
298.00 |
| VI-2103 |
No. 3 S90 Zahn Viscosity Cup (Each) with Conversion Chart |
133.00 |
| VI-2103/C |
Certified No. 3 S90 Zahn Viscosity Cup (Each) with Conversion Chart |
298.00 |
| VI-2104 |
No. 4 S90 Zahn Viscosity Cup (Each) with Conversion Chart |
133.00 |
| VI-2104/C |
Certified No. 4 S90 Zahn Viscosity Cup (Each) with Conversion Chart |
298.00 |
| VI-2105 |
No. 5 S90 Zahn Viscosity Cup (Each) with Conversion Chart |
133.00 |
| VI-2105/C |
Certified No. 5 S90 Zahn Viscosity Cup (Each) with Conversion Chart |
298.00 |
| VI-2100/C |
NIST & ANSI/NCSL Z540 or ISO/IEC 17025, ISO 9001, as applicable, Calibration Certificate |
165.00 |
| VI-3805 |
G-20 Certified Viscosity Standard - Pint |
91.00 |
| VI-3815 |
G-60 Certified Viscosity Standard - Pint |
91.00 |
| VI-3820 |
G-100 Certified Viscosity Standard - Pint |
91.00 |
| VI-3825 |
G-350 Certified Viscosity Standard -Pint |
91.00 |
| VI-VCC |
Viscosity Cup Equivalent Wall Chart (download here) |
FREE |
| PU-G205 |
S90 Manual |
20.00 |
| Equivalent Charts cover Gardco Calibrated Viscosity Cups and are based on conversion formulas of a type & with parameters as referenced in The Encyclopedia of Polymer Science & Engineering (Vol. 4, Second Edition, John Wiley & Sons, Inc.). Standard oils traceable to the National Institute of Standards & Technology were used in experimental development of these formulas. |
| VI-201901 |
Aluminum Carousel Stand w/5 Hooks |
300.00 |
| TM-AX705 |
Ultimate Stopwatch, 1/100 |
32.00 |
| TM-AX705/C |
Ultimate Stopwatch, 1/100 - Certified traceable to N.I.S.T |
54.00 |
| TH-0482 |
Thermometer, Glass, blue spirit filled, 4-1/2", 20° to 30°C |
52.00 |
| TH-16100860 |
GT-100R Thermometer, Stainless, 8" Stem, 25° to 125°F |
34.98 |
| TH-16100875 |
GT-100R Thermometer, Stainless, 8" Stem, 0° to 50°C |
34.98 |
| TH-36036-FC |
Platinum RTD Thermometer System (-76° to 500°F and -60° to 260°C) |
484.00 |
| LA-2029060 |
Griffin Beaker, 600 ml |
21.00 |
| Viscosity Cups are non-returnable items. Subject to final sale. |
| S90TM is a Registered Trade Mark of the Paul N. Gardner Company, Inc |
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