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Bubble ViscometersA5-A1 / A-T / U-Z6 / Z7-Z10

Manual

Bubble ViscometersA5-A1 / A-T / U-Z6 / Z7-Z10 Manual

PV-0500 SeriesPV-0600 Series

BYK-Gardner GmbHLausitzer Str. 8D-82538 GeretsriedGermanyTel. 0-800-gardner (0-800-4273637) +49-8171-3493-0Fax +49-8171-3493-140

BYK - Gardner USA9104 Guilford RoadColumbia, MD 21046USAPhone 800-343-7721 301-483-6500Fax 800-394-8215 301-483-6555

www.byk.com/instruments

Eng

lish

DIRECTIONS FOR USING THE GARDNER BUBBLE VISCOMETER A-5 to A-1 CAT. NO. PV-0500

This instrument is based on the principle that the viscosity is directly proportional to the bubble speed. The viscosity of a sample of varnish or other transparent liquid is therefore determined by reference to the standard tubes in which an air bubble rises with the same speed as it does in a tube of the sample being tested. For this purpose two carefully calibrated empty tubes are furnished with each set.

The bubble size of the sample is first adjusted as nearly as possible to that in the standard tubes. The tubes are then brought to a temperature of 25ºC (77ºF). This is essential due to the difference in the temperature coefficient of viscosity of mineral oils and varnishes. It is suggested that a water bath be used, which quickly brings the tubes to the proper temperature and insures greater accuracy.

The bubble should be started from the flat end of the tube held in a true vertical position. The bottom meniscus of the bubble should be used for comparing the samples. It is only necessary that they start together. Owing to unavoidable differences in bubble sizes and in the shapes of the ends of the tubes, it may be necessary to raise one of the tubes so that the points of comparison will be on the same level. The observation is made after the bubbles are completely formes and moving upwards along a true vertical line. This takes place about 1½ to 2 cm from the bottom of the tube.

The standard empty grade “A” tubes have been carefully selected to and I.D. of 10.65 ± 0.0025 mm. and should be used for exact determinations. However, this close tolerance is relatively expensive, and for the sake of economy, tubes

Directions for Using the Gardner Bubble Viscometer

2

Directions for Using the Gardner Bubble Viscometer

having the same approximate diameter with a tolerance of ± 0.150 mm. Grade “B” are used by many manufacturer for general factory control tests.

This viscometer meets the requirements of ASTM D 154, D 555, D 1131, D 1545, D 1725, FTMS 14la-Method 4271, and AOCS Method Ka6.

Approximate Viscosity in Stokes at 25º C (77º F)

A5 0.051

A4 0.071

A3 0.140

A2 0.213

A1 0.310

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Directions for Using the Gardner Bubble Viscometer

DIRECTIONS FOR USING THE GARDNER BUBBLE VISCOMETER A to T CAT. NO. PV-0510

This instrument is based on the principle that the viscosity is directly proportional to the bubble speed. The viscosity of a sample of varnish or other transparent liquid is therefore determined by reference to the standard tubes in which an air bubble rises with the same speed as it does in a tube of the sample being tested. For this purpose two carefully calibrated empty tubes are furnished with each set.

The bubble size of the sample is first adjusted as nearly as possible to that in the standard tubes. The tubes are then brought to a temperature of 25ºC (77ºF). This is essential due to the difference in the temperature coefficient of viscosity of mine-ral oils and varnishes. It is suggested that a water bath be used, which quickly brings the tubes to the proper temperature and insures greater accu-racy.

The bubble should be started from the flat end of the tube held in a true vertical position. The bottom meniscus of the bubble should be used for comparing the samples. It is only necessary that they start together. Owing to unavoidable differences in bubble sizes and in the shapes of the ends of the tubes, it may be necessary to raise one of the tubes so that the points of compari-son will be on the same level. The observation is made after the bubbles are completely formes and moving upwards along a true vertical line. This takes place about 1½ to 2 cm from the bottom of the tube.

The standard empty grade “A” tubes have been carefully selected to and I.D. of 10.65 ± 0.0025 mm. and should be used for exact determinations.

5

However, this close tolerance is relatively expensive, and for the sake of economy, tubes having the same approximate diameter with a tolerance of ± 0.150 mm. Grade “B” are used by many manufacturer for general factory control tests.

This viscometer meets the requirements of ASTM D 154, D 555, D 1131, D 1545, D 1725, FTMS 14la-Method 4271, and AOCS Method Ka6.

Approximate Viscosity in Stokes at 25º C (77º F)

A 0.54 B 0.69 C 0.93 D 1.03 E 1.23

F 1.52 G 1.60 H 2.11 I 2.24 J 2.68 K 2.88 L 3.02 M 3.35 N 3.45 O 3.78

P 4.09 Q 4.42 R 4.67 S 5.18 T 5.47

Directions for Using the Gardner Bubble Viscometer

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DIRECTIONS FOR USING THE GARDNER BUBBLE VISCOMETER „U“ to „Z-6“ CAT. NO. PV-0540

This instrument is based on the principle that the viscosity is directly proportional to the bubble speed. The viscosity of a sample of varnish or other transparent liquid is therefore determined by reference to the standard tubes in which an air bubble rises with the same speed as it does in a tube of the sample being tested. For this purpose two carefully calibrated empty tubes are furnished with each set.

The bubble size of the sample is first adjusted as nearly as possible to that in the standard tubes. The tubes are then brought to a temperature of 25ºC (77ºF). This is essential due to the difference in the temperature coefficient of viscosity of mine-ral oils and varnishes. It is suggested that a water bath be used, which quickly brings the tubes to the proper temperature and insures greater accuracy.

The bubble should be started from the flat end of the tube held in a true vertical position. The bottom meniscus of the bubble should be used for comparing the samples. It is only necessary that they start together. Owing to unavoidable differences in bubble sizes and in the shapes of the ends of the tubes, it may be necessary to raise one of the tubes so that the points of compari-son will be on the same level. The observation is made after the bubbles are completely formes and moving upwards along a true vertical line. This takes place about 1½ to 2 cm from the bottom of the tube.

The standard empty grade “A” tubes have been carefully selected to and I.D. of 10.65 ± 0.0025

Directions for Using the Gardner Bubble Viscometer

7

Directions for Using the Gardner Bubble Viscometer

mm. and should be used for exact determinations. However, this close tolerance is relatively expensive, and for the sake of economy, tubes having the same approximate diameter with a tolerance of ± 0.150 mm. Grade “B” are used by many manufacturer for general factory control tests.

This viscometer meets the requirements of ASTM D 154, D 555, D 1131, D 1545, D 1725, FTMS 14la-Method 4271, and AOCS Method Ka6.

Approximate Viscosity in Stokes at 25º C (77º F)

U 6.66 V 8.89 W 10.7 X 12.0

Y 17.4 Z 22.9 Z-1 29.1 Z-2 40.6

Z-3 48.4 Z-4 72.4 Z-5 99.2 Z-6 150.8

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Directions for Using the Gardner Bubble Viscometer

DIRECTIONS FOR USING THE GARDNER BUBBLE VISCOMETER Z-7 to Z-10 CAT. NO. PV-0560

This instrument is based on the principle that the viscosity is directly proportional to the bubble speed. The viscosity of a sample of varnish or other transparent liquid is therefore determined by reference to the standard tubes in which an air bubble rises with the same speed as it does in a tube of the sample being tested. For this purpose two carefully calibrated empty tubes are furnished with each set.

The bubble size of the sample is first adjusted as nearly as possible to that in the standard tubes. The tubes are then brought to a temperature of 25ºC (77ºF). This is essential due to the difference in the temperature coefficient of viscosity of mineral oils and varnishes. It is suggested that a water bath be used, which quickly brings the tubes to the proper temperature and insures greater accuracy.

The bubble should be started from the flat end of the tube held in a true vertical position. The bottom meniscus of the bubble should be used for comparing the samples. It is only necessary that they start together. Owing to unavoidable differences in bubble sizes and in the shapes of the ends of the tubes, it may be necessary to raise one of the tubes so that the points of comparison will be on the same level. The observation is made after the bubbles are completely formes and moving upwards along a true vertical line. This takes place about 1½ to 2 cm from the bottom of the tube.

The standard empty grade “A” tubes have been carefully selected to and I.D. of 10.65 ± 0.0025 mm. and should be used for exact determinations. However, this close tolerance is relatively expensive, and for the sake of economy, tubes having the same approximate diameter with a

9

Directions for Using the Gardner Bubble Viscometer

tolerance of ± 0.150 mm. Grade “B” are used by many manufacturer for general factory control tests.

This viscometer meets the requirements of ASTM D 154, D 555, D 1131, D 1545, D 1725, FTMS 14la-Method 4271, and AOCS Method Ka6.

Approximate Viscosity in Stokes at 25º C (77º F)

Z-7 407 Z-8 733 Z-9 915 Z-10 1190

253 017 659 EDFIS 0408 Europe