I n s t r u c t i o n S h e e t
012-07144B
Charge Producers and Proof Plane
ES-9057C
800-772-8700
www.pasco.com
®
*012-07144*
Introduction
The PASCO ES-9057C Charge Producers and Proof Plane are
electrostatic components for use with additional equipment from
the PASCO Basic Electrostatics System (ES-9080). 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.
Recommended Equipment*
•
Faraday Ice Pail (ES-9042A)
•
Basic Electrometer (ES-9078)
Related Equipment*
•
Conductive Spheres (ES-9059C)
•
Conductive Shapes (ES-9061)
*See the PASCO catalog or web site at www.pasco.com for more informa-
tion.
The Charge Producers
The charge producers consist of two wands, one with light mate-
rial and one with dark material attached to a conductive disk.
Briskly rub the light and dark surfaces of the two charge produc-
ers together. The disk with the light surface will acquire a posi-
tive charge; the disk with the dark surface will acquire a negative
charge. Rub the light surface charge producer against the proof
plane. The white disk will acquire a negative charge, while the
disk of the proof plane will acquire a positive charge.
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.
NOTE:
Oil 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 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. Occa-
sionally clean the disk surfaces and the neck with alcohol.
•
When you first use the charge producers, or just after clean-
ing, they may not produce charges readily. Rub the white
surface vigorously on the conductive disk of the proof plane.
Conductive
knob
Conductive knob
Light
surface
Dark surface
Non-conductive neck
Non-conductive neck (white)
Handle
Conductive disk (black)
Aluminum
surface
Conductive disk (black)
Non-conductive neck (white)
Handle
Conductive knob
Non-conductive neck
