Pasco Scientific ES-9054B, Инструкция по эксплуатации и руководство по экспериментам

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012-03175E
1
The Model ES-9054B Electrometer is an infinite
impedance (10
14
ý) voltmeter that can be used for
direct measurements of voltage, and indirect measure-
ments of current and charge. Because of its high
impedance, it is especially suited for measuring charge
in electrostatic experiments. It has a sensitivity nearly
1,000 times that of a standard, gold-leaf electroscope,
it has a center-zero meter that directly indicates charge
polarity, and it measures charges as low as 10
-11
coulombs.
With these features, you’ll find that your electrostatics
demonstrations and labs are easier to perform and, with
quantitative data, are more informative as well.
The electrometer is battery powered by two 9 volt
batteries, and comes complete with the batteries and a
shielded test lead. Instructions for inserting the
batteries are at the end of this manual.
Introduction
The controls on the front panel of the electrometer are
explained in Figure 1. Whether you’re using the
electrometer to measure voltage, current, or charge, the
following procedure should be followed each time you
turn on the electrometer. More information on making
accurate measurements is given in the sections that
follow.
Operation
äIMPORTANT:
①
Never use the Electrometer for measuring
potentials in excess of 100 volts.
②
Never connect the electrometer to an electro-
static generator such as a Van de Graff generator
or a Wimshurst machine.
③
Never touch the input leads until you have
grounded yourself to an earth ground. A person
walking across a rug on a cool, dry day can easily
pick up a potential of several thousand volts.