PCE Instruments PCE-RVI 7 User manual

PCE Americas Inc.

711 Commerce Way

Suite 8

Jupiter

FL-33458

USA

From outside US: +1

Tel: (561) 320-9162

Fax: (561) 320-9176

info@pce-americas.com

PCE Instruments UK Ltd.

Units 12/13

Southpoint Business Park

Ensign way

Hampshire / Southampton

United Kingdom, SO31 4RF

From outside UK: +44

Tel: (0) 2380 98703 0

Fax: (0) 2380 98703 9

info@pce-instruments.com

www.pce-instruments.com/english

www.pce-instruments.com

Manual

Viscometer PCE-RVI 7

Version 1.0

Date of creation: 16.11.2015

Date of last change: 07.06.2016

Manual

Contents

1Introduction .............................................................................................................3

2Safety notes.............................................................................................................3

3Specifications..........................................................................................................4

3.1 Technical specifications.............................................................................................................. 4

3.2 Contents of delivery.................................................................................................................... 4

3.3 Optional accessories .................................................................................................................. 4

4System description.................................................................................................5

4.1 Button and display description ................................................................................................... 5

5Setup........................................................................................................................6

5.1 Insert / replace the batteries....................................................................................................... 6

5.2 Attach a rotor / spindle................................................................................................................ 6

5.3 Measuring vessel........................................................................................................................ 6

6Measurement...........................................................................................................7

6.1 Turn on the viscometer............................................................................................................... 7

6.2 Select a rotor/spindle.................................................................................................................. 7

6.3 Take a measurement.................................................................................................................. 7

7Further functions ....................................................................................................8

7.1 Auto zero .................................................................................................................................... 8

7.2 Change the measuring unit ........................................................................................................ 8

8Troubleshooting......................................................................................................9

9Further information.................................................................................................9

9.1 Calibration................................................................................................................................... 9

9.2 Reference substances and viscosities ....................................................................................... 9

10 Disposal.................................................................................................................10

11 Contact...................................................................................................................10

11.1 PCE Instruments UK ................................................................................................................ 10

11.2 PCE Americas .......................................................................................................................... 10

Manual

1 Introduction

Thank you for purchasing a viscometer from PCE Instruments.

The PCE-RVI 7 viscometer measures the viscosity of fluids by using the Brookfield method. To increase

its field of application, the viscometer comes with 3 different spindle/rotor attachments for different

measuring purposes. The different measuring ranges of the rotors can be seen in chapter 3.1. Due to its

simple construction and its low weight, the PCE-RVI 7 can be used as a laboratory viscometer or as a

portable device.

2 Safety notes

Please read this manual carefully and completely before you use the device for the first time. The device

may only be used by qualified personnel and repaired by PCE Instruments personnel. There is no

warranty of damages or injuries caused by non-observance of the manual.

The device may only be used in the approved temperature range.

The case should only be opened by qualified personnel of PCE Instruments.

The instrument should never be placed with the user interface facing an object (e. g. keyboard

side on a table).

You must not make any technical changes to the device.

The appliance should only be cleaned with a damp cloth / use only pH-neutral cleaner.

Do not expose the device or its components (except for the rotors) to water or other liquids. Do

not operate the device with wet hands.

Before replacing the batteries, please make sure the device is turned off and no rotor is attached

to the engine shaft.

The viscometer must not be operated in areas with explosive or inflammable atmospheres.

The device should only be operated in a controlled electromagnetic environment. Transmitters,

such as mobile phones, should not be used near the viscometer.

Before taking a measurement, make sure that the device is levelled properly. Use a water level to

check and adjust.

This user's handbook is published by PCE Instruments without any guarantee.

We expressly point to our general guarantee terms which can be found in our general terms of business.

If you have any questions please contact PCE Instruments.

Manual

3 Specifications

3.1 Technical specifications

Rotational speed

fixed speed at 62.5 rpm

Measuring range

Rotor 3: 0.3 … 13 dPa s // 30 … 1,300 mPa s

(with measuring vessel no. 3)

Rotor 1: 3 … 150 dPa s // 300 … 15,000 mPa s

(with measuring vessel no. 3)

Rotor 2: 100 … 4,000 dPa s // 10,000 … 400,000 mPa s

(with measuring vessel no. 3)

Accuracy

±2 % f.s.

Repeatability

±1 %

Displayed data

rpm (fixed at 62.5 rpm)

selected rotor (R1 –R3)

dynamic viscosity (mPa s / dPa s)

full scale range

full scale percentage

battery level indicator

Rotors

3 different rotors included (R1, R2, R3)

Power supply

4 x AA LR6 or R6 batteries (6 V)

Battery life

24 … 30 hours of continuous operation

Operating conditions

+10 … +40 °C

≤80 % RH, non-condensing

max. 2,000 m above mean sea level

Pollution degree

Protection class

IP 20

Dimensions

170 x 110 x 410 mm

Weight

1.8 kg

Viscosity table

Rotor

Measuring range (dPa

Measuring range (mPa s)

Measuring

vessel

Sample

capacity

0.3 … 13 dPa s

30 … 1,300 mPa s

No. 3

±170 ml

3 … 150 dPa s

300 … 15,000 mPa s

No. 3

±170 ml

100 … 4,000 dPa s

10,000 … 400,000 mPa s

No. 3

±170 ml

3.2 Contents of delivery

1 x viscometer PCE-RVI 7

1 x set of rotors (R1, R2, R3)

1 x calibration certificate

1 x measuring vessel (no. 3; capacity 170 ml)

4 x 1.5 V AA batteries

1 x spindle protector

1 x instruction manual

1 x carrying case

3.3 Optional accessories

Calibration oils (500 ml)

Manual

4 System description

4.1 Button and display description

Attached rotor

Battery status

Full scale

percentage

Down button

Enter button

Up button

Viscosity

Rotational

speed

Manual

5 Setup

5.1 Insert / replace the batteries

The battery compartment is located at the back of the display unit. To open it, you have to loosen 2

screws first. Then you can remove the cover plate.

Replace the old batteries with 4 new AA batteries and make sure you insert them properly before

mounting the cover plate back on.

5.2 Attach a rotor / spindle

The rotors can be attached to the viscometer via a screw connection.

To do so, gently place the rotor at the bottom end of the engine shaft at the bottom of the display unit and

carefully turn it clockwise.

Note: Be careful when attaching the rotor to prevent damage to the rotor and shaft.

Note: Always keep the engine shaft and rotors clean, especially the screw connection.

Note: Every rotor has a mark with its name on it at the top end.

5.3 Measuring vessel

The included measuring vessel has 3 pins on the bottom side, which fit into the 3 holes on the base plate

of the viscometer. This prevents the measuring vessel from moving when you are taking a measurement.

To prepare a measurement, fill the vessel with a fluid up to the filling mark (170 ml) and place it on the

base plate.

Note: Make sure the viscometer is levelled properly before taking a measurement.

Rotor

Screw

connection

Engine

shaft

Manual

6 Measurement

6.1 Turn on the viscometer

To turn on the viscometer, you have to press and hold the Enter button for 2 seconds.

First, the display shows an information screen where you can see the version of your viscometer and its

firmware, as well as the battery status.

After that, you are redirected to the main screen. Here you can see the rotational speed, the current

viscosity, the selected rotor, the battery status and the full scale percentage.

To turn off the device, press and hold the Enter button for a few seconds.

Note: The full scale percentage refers to the maximum viscosity reading, which can be achieved with the

attached rotor.

6.2 Select a rotor/spindle

If the selected rotor on the display does not match with the one you attached to the engine shaft, you

have to select a different rotor.

To do so, press the Up / Down buttons when you are in the main screen. Now you can navigate through

all rotors available. The display shows the name of the rotor on the left side and its measuring range on

the right side.

By pressing the Up or Down button you can go to the next or previous rotor. Once you have found the

attached rotor, press Enter to confirm the selection.

6.3 Take a measurement

First, please make sure that the viscometer is levelled properly. Next, use the height adjustment at the

side of the viscometer and adjust it so that the measuring vessel can be placed on the base plate without

touching the rotor. After you placed the vessel on the base, use the height adjustment again and set it to

the lowest position possible. The wheel of the rotor should now be inside of the measuring vessel and

covered with the fluid to be measured.

Now, turn on the viscometer, select the attached rotor and press the Enter button to start the

measurement.

You will see the following screen:

The question marks mean that the device is waiting for the viscosity reading. After a short time, the

reading will show on the display.

If the viscosity of the fluid exceeds the measuring range of the rotor or the device, the display shows the

following:

Note: The full scale percentage can show readings between 5 and 100 % of the full scale. The optimum

lies between 10 and 90 % f.s. When below 5 %, the display shows “0” viscosity.

When you have finished your measurement, press Enter to stop the measurement and the rotation.

Manual

7 Further functions

7.1 Auto zero

If you start a measurement and initiate rotation without immersing the rotor into a fluid and the display

does not show zero, you have to use the auto zero function.

To do so, follow these steps:

Turn on the device by holding the Enter button for 2 seconds.

When the information screen appears, press the Down button and then the Enter button shortly, one after

the other.

Now you see this screen:

Press Enter to get to the next screen:

Now, remove the spindle/rotor and press Enter again to start the zeroing procedure. During the zeroing,

the display shows the following screen:

After the zeroing was successful, the viscometer automatically goes back to the information screen.

7.2 Change the measuring unit

To select the measuring unit (you can choose between mPa s and dPa s), turn on the viscometer by

pressing and holding the Enter button for 6 to 10 seconds. Once the information screen appears, press

the Up button followed by the Down button. Now you get to the following screen:

Press Enter to open the unit selection screen:

Here you can select the desired measuring unit (mPa s or dPa s) by using the Up and Down buttons.

After that, press Enter to confirm. You will be redirected to the information screen automatically.

Manual

8 Troubleshooting

Problem

Possible solution

The viscometer does not work

Check the batteries

The instrument does not show “zero” without any

fluids

Use the auto zero function

Viscosity speed is unstable and inaccurate

Check the rheological characteristics of the fluid

Perform a calibration check by using calibration

standards

Check if the rotor disk rotates steadily

Check if the temperature of the sample is stable

9 Further information

9.1 Calibration

The viscometer comes factory-calibrated and with a calibration certificate.

We recommend checking the accuracy of the viscometer on a regular basis by using optional calibration

oils.

For the verification, we recommend using the R3 rotor and a calibration standard of 1,000 mPa s. Perform

at least 5 measurements and compare the reading to the viscosity of the calibration oil.

Note: Keep in mind that the viscosity is greatly influenced by the temperature. Therefore, you should

perform the verification under the specified conditions of the calibration oil.

9.2 Reference substances and viscosities

Substance

Approx. viscosity (mPas)

Motor oil SAE 10

Olive oil

Coatings (airbrushed)

100

Yoghurt

150

Sugar solution 70 %

400

Lubricating oil

50 –1,000

Concentrated juice

1,500

Inks

550 –2,200

Honey

10,000

Nanocellulose (common additive)

8,000 –10,000

Toothpaste

100,000

Manual

10 Disposal

For the disposal of batteries, the 2006/66/EC directive of the European Parliament applies. Due to the

contained pollutants, batteries must not be disposed of as household waste. They must be given to

collection points designed for that purpose.

In order to comply with the EU directive 2012/19/EU we take our devices back. We either re-use them or

give them to a recycling company which disposes of the devices in line with law.

If you have any questions, please contact PCE Instruments.

11 Contact

If you have any questions about our range of products or measuring instruments please contact PCE

Instruments.

11.1 PCE Instruments UK

By post:

PCE Instruments UK Ltd.

Units 12/13 Southpoint Business Park

Ensign Way, Southampton

Hampshire

United Kingdom, SO31 4RF

By phone:

02380 987 035

11.2 PCE Americas

By post:

PCE Americas Inc.

711 Commerce Way

Suite 8

Jupiter

33458 FL

USA

By phone:

561 320 9162

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