MODERNER CNDB-4 Zahn Viscosity Cup (zahn cup) 4.3mm portable Zahn cup

Viscosity range 220~1100cSt, outflow time 20~80s, flow hole diameter 4.3mm, capacity 45ml, cup body material stainless steel, filter material stainless steel, handle material stainless steel, applicable standard ASTM D4212-93.

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CNDB-4

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Details SPEC Con OI

Moderner CNDB-4 Zahn Viscosity CupSPEC

Moderner CNDB-4 Zahn Viscosity CupDetails

Moderner CNDB-4 Zahn Viscosity CupPacking list

SKU: NB015115

Viscosity range: 220~1100cSt

outflow time: 20~80s

Flow hole diameter: 4.3mm

Capacity: 45ml

Cup body material: stainless steel

Filter material: stainless steel

Handle material: stainless steel

Applicable standard: ASTM D4212-93

CNDB-4

Zahn Viscosity Cup

use

Zahn Viscosity Cups are used to test the viscosity of Newtonian or near-Newtonian fluids. CNDB type Chai's Viscosity Cup is manufactured according to ASTM D4212-93 standard.

Model Selection

model	Measuring range	Recommended outflow time	Aperture
CNDB-1	5-60	35-80	2.0mm
CNDB-2	20-230	20-80	2.7mm
CNDB-3	150-850	20-80	3.8mm
CNDB-4	220-1100	20-80	4.3mm
CNDB-5	460-1840	20-80	5.3mm
Unit: cSt, s, mm
Other parameters
volume	45± 2ml

zahn portable Viscosity Cup

Use and maintenance

1. Clean the cup body with a suitable solvent before and after use.

2. Choose an appropriate cup number, and try to make the outflow time meet the recommended outflow time in the above table.

3. Immerse the cup body in the container for 1 to 5 minutes to make the cup reach thermal equilibrium, then pull the cup vertically out of the raw material, and the action needs to be fast and steady. When the top edge of the cup leaves the liquid surface, keep the cup body vertical when the liquid flows, and the distance between the bottom of the cup and the liquid surface of the container should not exceed 150mm. Stop timing when the first breakpoint occurs, and the number of seconds of outflow time at this time indicates a certain viscosity value. The difference between the two measured values should be less than 5% of the average value.

4. Convert the outflow time into kinematic viscosity according to the following formula: (sample temperature is 25°C±0.5°C when measuring)

ν = k(t - c)

In the formula: ν—kinematic viscosity, cSt

t — outflow time, s

k, c — corresponding constants (see table below)

cup number	1	2	3	4	5
k	1.1	3.5	11.7	14.8	twenty three
c	29	14	7.5	5	0

FAQ

QOur laboratory needs to test coatings of different viscosities. How should we choose the type?

A You can choose according to the viscosity range: CNDB-1 for low viscosity such as varnish (5-60cSt), CNDB-2 or CNDB-3 for ordinary paints (20-850cSt), CNDB-4 or CNDB-5 for high viscosity coatings (220-1840cSt). The key is to control the outflow time within 20-80 seconds, so that the measurement is the most accurate.

QWhat materials is CNDB-4 suitable for testing?

A The CNDB-4 is suitable for measuring high viscosity newtonian fluids such as paints, inks, and varnishes. Because of its 4.3mm pore size and 220-1100cSt range, it can accurately measure the viscosity of such materials, and it meets ASTM standards and has reliable data.

QWhat standards does the viscosity cup meet?

A CNDB-4 viscosity cup manufactured according to ASTM D4212-93 standard.

QI would like to ask how many seconds does the No. 3 cup measure the water? Is the No. 4 cup about 8 seconds?

QWhy does the measurement of outflow time need to keep the cup vertical?

A Keeping the cup vertical is to ensure the accuracy of measurement and avoid inaccurate fluid outflow time due to angular deviation.

QHow do the constants k and c of the CNDB Zahn viscosity cup relate to the cup number?

A The constants k and c of the CNDB Zahn viscosity cup are related to the cup number, and different cup numbers have different constant values, which are used to convert the outflow time to kinematic viscosity. The values of the constants k and c vary with the cup number, and the specific values are listed in the table provided.

QWhat is the recommended outflow time for the CNDB-4 viscosity cup?

A The recommended outflow time is 20-80 seconds.

QThe main use of CNDB Zahn viscosity cup?

A CNDB Zahn viscosity cup is mainly used to test the viscosity of Newtonian or approximate Newtonian fluids.

QWhat steps should I pay attention to when using the CNDB Zahn viscosity cup?

A The cup needs to be cleaned with a suitable solvent before and after use. Select the appropriate cup number to make the outflow time meet the recommended time as much as possible. After immersing the cup body in the container for 1 to 5 minutes to achieve hot equilibrate, then pull out the cup vertically. The action should be fast and smooth. From the time the upper edge of the cup leaves the liquid surface, the liquid should be kept vertical when flowing, and ensure that the distance between the bottom of the cup and the liquid surface of the container does not exceed 150mm. Stop timing when the first breakpoint occurs. At this time, the number of seconds of outflow time indicates a certain size of viscosity value. The difference between the two measured values should be less than 5% of the average value.

QWhat is the capacity of the CNDB-4 Zain Cup?

A Hello, this Zahn viscosity cup has a capacity of 45ml.

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