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A&D GX-13 Instruction Manual

Manual is about: Density Determination Kit

Summary of GX-13

  • Page 1

    Gx-13 density determination kit for gx-200/300/400/600/800/1000 gf-200/300/400/600/800/1000 instruction manual wm+pd4000134d.

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    ? 2005 a&d company ltd. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, or translated into any language in any form by any means without the written permission of a&d company ltd. The contents of this manual and the specifications of the instrument cover...

  • Page 3: Contents

    -1- contents welcome!..............................................................................................................................2 best measurement conditions ..........................................................................................2 1. The kit includes...............

  • Page 4: Welcome!

    -2- welcome! Thank you for your a&d purchase! This is the instruction manual for the density determination kit. The density determination kit, when combined with our electronic balance (gx-200, gx-300, gx-400, gx-600, gx-800, gx-1000, gf-200, gf-300, gf-400, gf-600, gf-800, gf-1000), allows the dens...

  • Page 5: 1. The Kit Includes

    -3- 1. The kit includes.

  • Page 6: Density

    -4- 2. Principle of density measurement density density refers to the total amount of mass of a sample per unit volume. (unit: g/cm 3 , etc.) : density m : mass v : volume specific gravity specific gravity refers to the ratio of the density of a sample to the density of pure water (with the same vol...

  • Page 7: Density of A Solid

    -5- density of a solid the density of a solid can be obtained according to the weight of the sample in air, weight in liquid and the density of the liquid. : density of sample a : weight in air b : weight in liquid : density of liquid density of a liquid a float with a known volume is used. The dens...

  • Page 8: 3. Error Factors

    -6- 3. Error factors there are several things that can affect the accuracy of a density measurement. Buoyancy of air when the density of a liquid is measured, an upward force, 0.0010 to 0.0014 g/cm 3 , is exerted in proportion to the volume of the liquid. The buoyancy in air per 1 cm 3 is found by: ...

  • Page 9: Influence of Wire

    -7- influence of wire when a solid sample is placed on the density pan, which is immersed in a liquid, for a density measurement, the liquid surface position rises. At this time, the wire (φ1 mm) connecting the upper and lower pans is subject to the buoyancy whose magnitude is equal to the weight of...

  • Page 10: Assembling The Kit

    -8- 4. Measuring the density of a solid assembling the kit (on the balance with a glass breeze break installed) (1) remove the weighing pan from the balance. (2) set the density pan stand on the balance. (3) set the beaker stand so that it does not touch the density pan stand. Set the beaker stand s...

  • Page 11: Assembling The Kit

    -9- assembling the kit (on the balance without a glass breeze break installed) (1) remove the weighing pan from the balance. (2) place the density pan stand on the balance. (3) set the beaker stand so that it does not touch the density pan stand. Set the beaker stand spacers under the beaker stand l...

  • Page 12

    -10- measuring the density of a solid the density of a solid is obtained by averaging the measured values. (1) start the measurement when the water temperature becomes stable. (2) press the re-zero key to reset the displayed value to zero. (3) place the sample on the upper pan and record its weight ...

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    -11- weight in air a (g) weight in liquid b (g) water temperature ( o c) (g/cm 3 ) 26 density of water (g/cm 3 ) 4.810 0.595 0.99678 8.06 (calculated value) (7) the density will be found by: where : density of sample (g/cm 3 ) a : weight in air (g) b : weight in liquid (g) : density of water (g/cm 3...

  • Page 14: Assembling The Kit

    -12- 5. Measuring the density of a liquid assemble the kit as described in the procedure below. Assembling the kit (1) follow the assembly procedure described in "4. Measuring the density of a solid", up to the setting of the beaker stand. (2) attach the thermometer clamp to the beaker and insert th...

  • Page 15

    -13- measuring the density of a liquid measure the density of a liquid by the following procedure: (1) press the re-zero key with the float hanging. (2) pour the liquid whose density is to be measured into the beaker. Adjust the amount of the liquid so that the float is about 10 mm below the surface...

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    -14- 6. Measurement using the density mode of the gx/gf series balance the gx/gf series balance is equipped with a density mode. It calculates the density of a solid using the weight of a sample in air and the weight in liquid. The density mode was not selected for use when the balance was shipped f...

  • Page 17

    -15- ● selecting a way to set the density of a liquid select the liquid density input method from the function table below. The function table is available only when the density mode is selected. Operation (1) press and hold the sample key to display ba5fnc . (2) press the sample key several times t...

  • Page 18

    -16- entering the water temperature ( ldin 0 ) in the density mode, press and hold the mode key until the water temperature currently set (unit: °c, factory setting : 25°c) is displayed. Use the following keys to change the value. Re-zero key to increase the temperature by one degree. (0-99) mode ke...

  • Page 19

    -17- measuring the density in the density measurement, the balance displays the weight of a sample in air, the weight in liquid and then the density. Z measuring the weight of a sample in air. The processing indicator blinks with the unit “g” displayed. Z measuring the weight of a sample in liquid. ...

  • Page 20

    -18- measuring procedure (1) confirm that the balance is in the mode to measure the weight of the sample in air. (“g” displayed and processing indicator blinking) (2) confirm that the balance indicates zero. If it does not indicate zero, press the re-zero to reset the displayed value to zero. (3) pl...

  • Page 21

    -19- 7. Frequently asked questions on density determination q: i'd like to measure the density of a resin pellet or sheet, which floats in water. Is it possible? A: use a liquid that has a lower density than water and does not dissolve the sample, such as methanol (density 0.798) or kerosene (densit...

  • Page 22

    -20- q: up to what size of sample can be measured? A: considering the density pan size, the maximum size of the sample that can be measured is as follows: diameter 25 mm height 30 mm mass 100 g q: can i measure the density of a liquid with a high viscosity? A: a liquid with a viscosity up to 500 mpa...