Instruction manual

Instruction Sheet
for the PASCO
Model ES-9057A
Charge Producers and Proof Planes
012-05258B
10/94
$1.00
Phone [phone] • FAX [phone] • TWX 910-383-2040
10101 Foothills Blvd. • P.O. Box 619011 • Roseville, CA 95678-9011 USA
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Introduction
The ES-9057A Charge Producers and Proof Planes are
electrostatic components for use with additional equip-
ment from the PASCO Electrostatics System ES-9062A.
The two charge producers are used to generate equal posi-
tive and negative charges by contact. The two proof
planes can be used to measure charge density on a
charged object.
The Charge Producers
The charge producers consist of two wands, one with blue
and one with white material attached to a conductive disk.
Briskly rub the blue and white surfaces of the two charge
producers together. The disk with the white surface will
acquire a positive charge; the disk with the blue surface
will acquire a negative charge. Rub the white surface of
the one charge producer against one of the proof planes.
The white disk will acquire a negative charge, while the
other disk will acquire a positive charge.
➤ NOTE: Any build-up on the non-conductive neck
can affect results. Clean with alcohol before using.
• If a zero charge is desirable, discharge the charge
producers by touching the conductive disk and
handle to ground. To be sure the disk and handle is
fully discharged, gently breathe on the non conduc-
tive neck. The moisture from your breath will help
remove any stray charge.
• Avoid touching the neck during normal use. The oils
from your hands will provide a path for charges to
leak off. Occasionally clean the disk surfaces and the
neck with alcohol.
• When you first use the charge producers, or just after
cleaning, they may not produce charges readily. Rub
the white surface vigorously on the conductive proof
plane disk.
➤ NOTE: The Charge Producers are designed to
be used with an electrometer (ES-9054B). They do
not produce sufficient charge for use with a stan-
dard electroscope.
The Proof Planes
The proof planes (set of two wands) are conductive disks
attached to insulated handles. They are used to sample the
charge density on charged conductive surfaces.
Conductive disk
(black)
Non conductive
neck (white)
Blue
surface
White
surface
Conductive disk
(black)
Non conductive
neck (white)