Elcometer 2250 Manuel utilisateur

Elcometer 2250

Krebs Viscometer

Operating Instructions

This product meets the Electromagnetic Compatibility Directive and the Low Voltage

Directive.

The product is Class B, Group 1 ISM equipment according to CISPR 11.

Group 1 ISM product: A product in which there is intentionally generated and/or used conductively

coupled radio-frequency energy which is necessary for the internal functioning of the equipment

itself.

Class B product are suitable for use in domestic establishments and in establishments directly

connected to a low voltage power supply network which supplies buildings used for domestic

purposes

, is a registered trademark of Elcometer Limited.

All other trademarks acknowledged.

(in a retrieval system or otherwise) or translated into any language, in any form or by any means

(electronic, mechanical, magnetic, optical, manual or otherwise) without the prior written permission

of Elcometer Limited.

A copy of this Instruction Manual is available for download on our Website via www.elcometer.com.

Doc.No. TMA-0475 Issue 03

Text with Cover No: 21806

CONTENTS

Section Page

1 About your Viscometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1 What the box contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.3 Krebs units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.1 The parts of the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.2 Rear connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.3 Installing the Viscometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.4 Fitting the spindle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.5 Fitting a sample container support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.6 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4 The sample. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 Sample quantity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2 Sample temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 Configuring your Viscometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6 Taking a measurement in automatic mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7 Taking a measurement in manual mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

8 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8.1 Security stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8.2 Unstable readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8.3 Instrument does not zero. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

9 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

10 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

10.1 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

10.2 Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

11 Technical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

12 Spare parts and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

13 Related equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Thank you for purchasing this Elcometer Krebs Viscometer. Welcome to Elcometer.

Elcometer are world leaders in the design, manufacture and supply of inspection equipment for

coatings and concrete. Our products cover all aspects of coating inspection, from development

through application to post application inspection.

The Elcometer Krebs Viscometer is a world beating product. With the purchase of this product you

now have access to the worldwide service and support network of Elcometer. For more information

visit our website at www.elcometer.com

1 ABOUT YOUR VISCOMETER

The Elcometer Krebs Viscometer measures the viscosity of paints, varnishes, adhesives, pastes

and liquid inks in accordance with ASTM D 562 and other standards.

This simple-to-use instrument consists of a paddle mounted on the end of a rotating spindle. The

paddle is immersed in the sample and rotated at a constant speed of 200 revolutions per minute.

The viscometer automatically calculates the viscosity value from the power required to maintain the

speed of rotation of the spindle.

A digital display shows the viscosity of the sample in Krebs units, centipoise or grams.

The Elcometer Krebs Viscometer features manual or automatic operation. In automatic mode, at

the press of a button:

• the spindle lowers into the sample to a pre-set depth

• the instrument waits to allow turbulence in the sample to subside (the wait time is adjustable)

• the spindle rotates and the measurement is taken (the measurement rotation time is

adjustable)

• the spindle rises out of the sample.

The operation of the Elcometer Krebs Viscometer is based on the Stormer mechanical system. In

this system a blade rotates at a constant angular velocity and the variation of viscosity between

products is determined by modifying theweight (ingrams) neededto maintainthis constantvelocity.

1.1 What the box contains

Note: When removing the viscometer from the packaging box, hold the viscometer by the

base and the column - do not lift it by the head.

•Viscometer

• Drive coupling protection cap, plastic

• Krebs spindle

• Sample container support, large, for 600 ml glass beaker and 1 pint (USA) can

• Sample container support, small, for ½ pint (USA) can

• Locating plug for sample container support

• Sample container, 600 ml, glass

• Hexagonal wrench, 1.5 mm

• Power supply cable

• Calibration certificate

• Operating instructions

Your Elcometer Krebs Viscometer is packed in a cardboard and foam package. Please ensure that

this packaging is disposed of in an environmentally sensitive manner. Consult your local

Environmental Authority for further guidance.

1.2 Standards

Your Viscometer can be used in accordance with the following National and International

Standards:

• AS/NZS 1580.214.1

• ASTM D 562

• ASTM D 1084-C

1.3 Krebs units

The Elcometer Krebs Viscometer is suitable for measuring in Krebs units (KU) the viscosity of

paints, varnishes, adhesives, pastes, liquid inks and other similar substances.

The Krebs unit scale is commonly used to refer to viscosity or consistency of paints that are applied

by brush or roller.

The Krebs unit is defined by following equation:

• For viscosity in the range from 200 cP to 2100 cP

KU = 1.1187 + 0.8542 ln ( 0.1938 v + 36 ) - 0.0443 [ ln ( 0.1938 v + 36 ) ] 2

• For viscosity in the range from 2100 cP to 5000 cP

KU = 1.8118 + 0.596 ln ( 0.1938 v + 36 ) - 0.0206 [ ln ( 0.1938 v + 36 ) ] 2

where:

• KU is viscosity in Krebs units

• v is viscosity in centipoise (cP)

Note: The equivalent viscosity in cP given by the instrument should only be used for comparison

between one sample and another; it must never be used for quantitative measurement of viscosity.

To maximise the benefits of your new Elcometer Krebs Viscometer please take some time to

read these Operating Instructions. Do not hesitate to contact Elcometer or your Elcometer

supplier if you have any questions.

2 CAUTION

The Elcometer Krebs Viscometer has been manufactured with your safety in mind.

However, improper use can result in damage to the machine.

Please observe the precautions discussed in these operating instructions.

• To reduce the risk of electric shock, do not open the Viscometer. There are no

user-serviceable parts inside.

• To reduce the risk of fire or electric shock, do not expose the Viscometer to rain or excess

moisture.

• The mains plug on your Viscometer may be fitted with a fuse. When replacing this fuse, ensure

a fuse of the correct rating is used.

• Do not use the Elcometer Krebs Viscometer in hazardous environments.

3 GETTING STARTED

3.1 The parts of the instrument

Viscometer head with

display and control

panel

Spindle

Base

Column

Sample container

support for

beaker/can

3.2 Rear connections

3.3 Installing the Viscometer

To install your Viscometer:

1. Place the base on a stable and flat

surface.

2. Rotate the adjustable feet under the

base until the instrument is level; use a

bubble level placed on the base of the

instrument as a guide.

3. Remove the plastic drive coupling

protection cap from the bottom of the

Viscometer; pull the cap vertically

down until it is well clear of the drive

coupling and then remove to one side.

Do not dispose of the protection

cap. To prevent accidental damage

to the drive coupling, always replace

the cap when the instrument is not

in use.

4. Connect the instrument to the mains.

Power supply socket

RS 232 interface

Power on/off switch

Drive

coupling

protection

cap

3.4 Fitting the spindle

Note: This operation must be done very

carefully to ensure that the spindle is not

bent and the motor drive coupling or internal

components are not damaged.

1. Check that the connecting surfaces of

the spindle and the motor drive

coupling are clean.

2. Insert the spindle as far as it will go up

into the motor drive coupling.

3. Using the hexagonal wrench supplied,

rotate the retaining screw until it just

makes contact with the spindle.

4. Pull down on the spindle until its

movement is stopped by the retaining

screw.

5. Tighten the retaining screw.

3.5 Fitting a sample container

support

During a test, the sample container (glass

beaker or can) is held in position at the

correct height by the sample container

support. Two supports are supplied with the

instrument - a large one and a smaller one.

Which support you use depends upon the

size of the sample container.

The sample container support is held in

position on the base by the locating plug.

To fit the sample container support:

When using the glass beaker supplied

with the instrument, or a 1 pint (USA)

can

1. Place the locating plug into the recess

on the base of the instrument.

2. Place the large sample container

support onto the locating plug.

When using a ½ pint (USA) can

1. Place the locating plug into the recess on the base of the instrument.

2. Place the large sample container support onto the locating plug.

3. Place the smaller sample container support into the recess on the top of the large sample

container support.

Spindle

Drive

coupling

Smaller

support

Large

support

Locating

plug

3.6 Control panel

Your Viscometer is controlled using the five buttons on the control panel on the front of the

Viscometer head.

4 THE SAMPLE

4.1 Sample quantity

To maximise the accuracy and consistency of test results, always use the same quantity of sample

for each test.

To determine the correct quantity of sample, do the following:

1. Place the sample container on the sample container support.

2. Attach the spindle to the drive head (see “Fitting the spindle” on page 8).

3. Switch on the instrument and select manual mode (see “Taking a measurement in manual

mode” on page 14).

4. Press [DOWN] until the spindle reaches the lowest position (the instrument will sound an

audible beep when the spindle reaches the lowest position).

5. Pour the sample into the container. Stop pouring when the surface of the sample reaches the

notch on the spindle shaft. If using the 600 ml glass beaker supplied with the instrument,

450 ml to 460 ml of sample will be required to reach this level.

6. Make a record of the quantity of sample used.

Whenever you conduct a test, always use this same quantity of sample. By doing this, you will be

able to perform different measurements with the same working conditions, therefore permitting

reliable comparisons between test results to be made.

4.2 Sample temperature

The temperature of the sample has a significant effect upon its viscosity. Always check the

temperature of the sample before conducting a test. The temperature of the sample must be stable

and at the value specified in the test standard.

Raise and lower

spindle (manual

mode)

Scroll in menus

Start test

(automatic mode)

Stop test

Start test (manual mode)

Confirm menu selection

5 CONFIGURING YOUR VISCOMETER

To configure your Elcometer Krebs Viscometer ready to take measurements, do the following:

1. Switch on the Viscometer (use the power on/off switch at rear of head).

The instrument displays:

2. While the welcome message is displayed (5 seconds), press [START] and then [ENTER].

The instrument displays the viscosity units selection screen:

3. If necessary, press [UP] or [DOWN] to select the working units: Ku (Krebs units),

cP (Centipoise) or g (grams).

4. Press [ENTER] to confirm your selection.

The instrument displays the SWT (sample wait time) selection screen:

5. If necessary, press [UP] or [DOWN] to select the sample wait time: minimum = 1 second,

maximum = 99 seconds, default = 1 second.

6. Press [ENTER] to confirm your selection.

The instrument displays the SMT (sample measure time) selection screen:

7. If necessary, press [UP] or [DOWN] to select the sample measure time: minimum = 5 seconds,

maximum = 99 seconds, default = 10 seconds.

2250 KV 1.1

Viscosity Units

SWT: 01

Sample Wait Time

SMT: 10

Sample Measure Time

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