Instruction Sheet
for the PASCO
Model ES-9057B
CHARGE PRODUCERS AND PROOF PLANE
012-07144A
5/99
$1.00
© 1994 PASCO scientific
Introduction
The PASCO ES-9057B Charge Producers and Proof
Plane are electrostatic components for use with additional
equipment from the PASCO Electrostatics System
ES-9062B. The two charge producers are used to
generate equal positive and negative charges by contact.
The proof plane 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 producers against the proof
plane. The white disk will acquire a negative charge, while
the disk of the charge producers will acquire a positive
charge.
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• 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 conductive 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 disk of the
proof plane
➤
NOTE:
The charge producers are designed
to be used with an electrometer (ES-9054B).
They do not produce sufficient charge for use
with a standard electroscope.
The Proof Plane
The proof plane is an aluminum-covered conductive disk
attached to an insulated handle. It is used to sample the
charge density on charged conductive surfaces.
blue surface
conductive disk
(black)
non-conductive
neck (white)
white surface
handle
➤
NOTE:
Oil build-up on the non-conductive
neck can affect results. Clean with alcohol
before using.
conductive disk
(black)
non-conductive
neck (white)
aluminum surface
handle
