Kern ABT-A01 User guide

KERN & Sohn GmbH

Ziegelei 1	Tel: +49-[0]7433- 9933-0
D-72336 Balingen	Fax: +49-[0]7433-9933-149
E-Mail: [e-mail]	Internet: www.kern-sohn.com

Operating Instructions Density Determination Set for Analytical Balance KERN ABT

KERN ABT-A01

Version 1.0 02/2007 GB

ABT-BA-e-0710

KERN ABT-A01

GB

Version 1.0 2/2007

Operating Manual

Density Determination Set for Analytical Balance KERN ABT

Contents:

1	INTRODUCTION ............................................................................................................................		4
	1.1	SCOPE OF DELIVERY.................................................................................................................	5
2	INSTALLING THE DENSITY DETERMINATION SET ..................................................................		7
3	PRINCIPLE OF DENSITY DETERMINATION...............................................................................		9
	3.1	INFLUENCING MAGNITUDES AND ERROR SOURCES ....................................................................	10
4	DENSITY DETERMINATION OF SOLIDS...................................................................................		11
	4.1	ACTIVATE FUNCTION ...............................................................................................................	12
	4.2	ENTERING DENSITY FOR FLUID................................................................................................	13
	4.3	CARRYING OUT MEASUREMENT ..............................................................................................	14
5	DETERMINING DENSITY OF LIQUIDS ......................................................................................		14
	5.1	ACTIVATE FUNCTION ...............................................................................................................	14
	5.2	ENTERING DENSITY OF GLASS PLUMMET.................................................................................	16
	5.3	CARRYING OUT MEASUREMENT ..............................................................................................	17
6	PRECONDITIONS FOR PRECISE MEASUREMENTS...............................................................		18
	6.1	CALCULATION OF RESULTS .....................................................................................................	18
	6.2	INFLUENCE FACTORS FOR MEASUREMENT ERRORS .................................................................	19
	6.2.1	Air bubbles.......................................................................................................................	19
	6.2.2	Solid Specimen................................................................................................................	19
	6.2.3	Liquids..............................................................................................................................	19
	6.2.4	Surface.............................................................................................................................	19
	6.2.5 Glass Plummet for Measuring Fluids...............................................................................		20
	6.3	GENERAL INFORMATION ..........................................................................................................	20
	6.3.1 Density / Relative Density................................................................................................		20
	6.3.2 Drift of Balance Display ...................................................................................................		20
7	DENSITY TABLE FOR FLUIDS...................................................................................................		21
8	UNCERTAINTY OF MEASUREMENT FOR DENSITY DETERMINATION OF SOLIDS............		22
9	USER INSTRUCTIONS................................................................................................................		23

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1 Introduction

Safety instructions:

In order to guarantee a safe and smooth operation of this instrument, you have to comply with the precautions below.

1.Carefully read the operating instructions.

2.Handle this set and the balance with care as they are precision instruments. This set contains parts made of glass. Protect all parts against shocks and impacts.

3.Do not disassemble this set nor the balance.

KERN ABT-A01 Density determination set for analytical balances of the KERN ABT series (readability d = 0.1 mg).

This set is designed for the efficient determination of the density of solids by means of an analytical balance.

In addition the density of fluids may be determined by means of an additional plummet.

These operating instructions only describe the operation of the density determination set. For further information on how to operate your balance please refer to the operating instructions supplied with each balance.

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1.1 Scope of delivery

SAMPLE DISH

SAMPLE DISH

FILTER BOWL

FILTER BOWL

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MONTAGE THERMOMETER:

No.	Designation
1	Platform assembly (sample dish and sifting bowl), 2 x
2	Weighing platform with rack
3	Beaker
4	Platform for glass beaker
5	Thermometer
6	Holder for thermometer
7	--
8	Glass plummet

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2 Installing the density determination set

1.Turn off and disconnect the power supply for the balance

2.Open the lateral glass doors of the weighing space of the balance and remove the grading ring, the weighing plate and the support of the weighing plate.

3. Carefully insert the weighing platform with rack onto the floor of the weighing space.

4. Place the platform for the glass beaker above it without touching the weighing platform, as shown.

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5. Attach the platform assembly (sample dish and sifting bowl) to the rack of the weighing platform. In doing so, bear in mind that the centering of the upper sample dish matches the notch in the upper part of the weighing platform.

6.Close the glass doors and connect the power supply for the balance. Wait for the auto test of the balance and the display message "oFF“. Some models additionally carry out an automatic adjustment before displaying “oFF“. (Connect the balance to the platform assembly but without any fluid in the glass beaker. )

7.Turn on the balance by pressing the [ON/OFF] key, so that gram appears on the display.

8.Attach the holder with thermometer to the glass beaker. Fill the glass beaker with known fluid (for density determination of solids) or test fluid (for density determination of fluids).

9.To be able to place the glass beaker in the centre of the platform, the platform assembly must first be removed from the rack.

10.Reattach the platform assembly to the rack and ensure that the sifting bowl does not touch the glass beaker.

11.Observe the waiting time until the test fluid, the known fluid, the instruments or the plummet have the same temperature. For the balance also observe the required warm-up time. (For details please refer to the operating instructions for the balance)

Attention:

•The platform for the beaker must not touch the frame!

•When the density set is installed, correct adjustment is not possible. To achieve correct adjustment reinsert the weighing plate.

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