Instruction Sheet
for the PASCO
Model ES-9078
BASIC ELECTROMETER
012-07124B
9/99
$1.00
© 1999 PASCO scientific
Introduction
The Model ES-9078 is a voltmeter used for direct
measurements of voltage and indirect measurements
of current and charge. Because of its high (“infinite”)
impedance of 10
14
ohms, it is especially suited for
measuring charge in electrostatic experiments. It has a
sensitivity nearly 1000 times that of a standard gold-
leaf electroscope, a center-zero meter that directly
indicates charge polarity, and 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.
The electrometer is powered by four AA-alkaline
batteries, easily replaced by opening the back casing
of the electrometer.
EQUIPMENT
Parts included:
• Basic Electrometer (ES-9078)
• Associated Cables, four (4)
Additional parts required:
• Faraday Ice Pail (ES-9042A)
• Proof Plane
• Basic Variable Capacitor (ES-9079)
• Pasco Computer Interface (Model 750, 500 or
300)
When replacing batteries, do not touch any
of the components or wires in the integrated
circuit panel; the components and
wires are all static sensitive.
