Instruction/ maintenance manual of the product LER 2420 Learning Resources
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LER 2420 © Learning Resources, Inc., Ve r non Hills, IL (U.S.A.) Learning Resources Ltd., King’s L ynn, Norfolk (U.K.) Please retain our address for future reference. Made in China. LPK 2420-TG U.S. Patent No. D379,315 U.K. Patent No. 2057016 T e acher ’ s Guide ! W ARNING: CHOKING HAZARD - Small parts.
Precision Sc hool Balance Y our Precision School Balance (LER 2420) will help students explore, develop, and extend their understanding of mathematical and scientific concepts including inequalities, mass, comparisons, the four operations, and order .
on one side of the balance and use masses to find out if an object has greater , lesser , or close to equal the mass in a unit weight. Equal Masses Once students ha ve explored measurements that are greater , lesser , or close to the actual mass, encourage them to find the actual mass.
deux poids de 5 grammes, deux poids de 10 gr ammes, un poids de 20 gramme et un poids de 50 gr ammes, ainsi que ce manuel de quatre pages destiné aux enseignants.
Équilibre des masses Une fois que les élèves ont découv ert que les objets ont un poids supérieur , inférieur ou proche de celui du poids utilisé de l’autre côté de la balance, incitez-les à trouver le poids réel. Montrez-leur les lignes de calibrage qui indiquent quand la balance est équilibrée.
Bestandteile der W aage Ihre Präzisionsschulw aage besitzt viele Eigenschaften, die die Anwendung für die Schüler erleic htern, dessen Genauigkeit jedoch präzise Messungen erlaubt. Dazu gehören: • Der Stabilisierknopf ermöglicht es Ihnen, sc hnelle un genaue Messungen vorzunehmen.
10 7 Erklären Sie den besten W eg, einen Gegenstand zu wiegen. Führen Sie Beispiele an und lassen Sie die Schüler selbst den besten Weg herausfinden, das Gewic ht eines Gegenstandes zu bestimmen.
8 9 • Un botón de amortiguamiento que le permite hacer mediciones rápidas y precisas. Este botón estabiliza el brazo oscilante y evita que los platillos oscilen dur ante la medición. • Una guía de calibración que le permite poner a "cero" la balanza siempre que la balanza se muev a o se transporte.
An important point after buying a device Learning Resources LER 2420 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Learning Resources LER 2420 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Learning Resources LER 2420 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Learning Resources LER 2420 you will learn all the available features of the product, as well as information on its operation. The information that you get Learning Resources LER 2420 will certainly help you make a decision on the purchase.
If you already are a holder of Learning Resources LER 2420, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Learning Resources LER 2420.
However, one of the most important roles played by the user manual is to help in solving problems with Learning Resources LER 2420. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Learning Resources LER 2420 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
