Instruction Sheet
for the PASCO
Model EM-6715
Mounting screw
(adjustable position)
012-07512A
12/00
$1.00
Helmholtz Coil Base
Mounting screw
(0 cm fixed position)
Rectangular boxes
(for recommended coil position)
Introduction
The PASCO EM-6715 Helmholtz Coil Base allows
you to mount and change the distance between the
PASCO EM-6711 Field Coils and is used in studies
of electromagnetism. The base has a slot that allows
the coils to be separated at any distance from 3 to 20
cm. Two rectangular boxes are marked on the base to
denote the recommended placement of the coils at a
10 cm separation distance.
Additional Equipment Required
PASCO Field Coils (EM-6711)
Additional Equipment Recommended
Magnetic Field Sensor (CI-6520A)
Linear Motion Accessory (CI-6538)
Rotary Motion Sensor (CI-6538)
Power Supply (SE-9720)
Large Base and Support Rod (ME-9355)
ScienceWorkhop® Interface (500, 700 or 750)
DataStudio™, version 1.5.2 or later
Specifications
Base: 11.071 x 5.35x x 1.5; aluminum with black
finish; mounting holes 0.25 inch (0.635 cm)
Cap screw: 1/4-20 x 3/4 in.
Thumb screw: 1/4-20 x .540 in.
Cap washer: 0.312 x 0.204 x 0.012 in.
Mounting the Helmholtz Coils on the
Helmholtz Coil Base
1. Place the first coil over the rectangular slot on the
end of the base (0 cm position). Use the provided
cap screw to secure the mount firmly against the
top surface of the base. (See Figure 1.)
2. Attach the second coil to the cap screw provided in
the center slot on the base, and slide it to the
desired position. Then secure the mount firmly
against the top surface of the base. (See Figure 2.)
© 1999 PASCO scientific
Helmholtz Coil Base 012-07512A
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200 TURN FIELD COIL
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Figure 3: Coils Positioned in the Base
Figure 1: Attaching the fixed-position coil
200 TURN FIELD COIL
200 TURN FIELD COIL
slide
direction
Figure 2: Attaching the adjustable coil
NOTE: The separation distance between the two
rectangular boxes on the base is 10 cm and is equal to
the radius of the PASCO Field Coils (See Figure 3).
A uniform magnetic field can be generated between
the coils when the two coils are placed 10 cm (1
radius) apart.
Recommended Experimental Setup
Use the Helmholtz Coils with the Rotary Motion
Sensor and the Magnetic Field Sensor to determine the
magnetic field strength for various positions both
outside and inside the Field Coils. Set up the
equipment as shown in Figure 4.
Rotary Motion
Linear Motion
Accessory
to
ScienceWorkhop
Interface
Sensor
Magnetic Field
Sensor
stand and
support rod
to power supply
Figure 4: Recommended experiment setup
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012-07512A Helmholtz Coil Base
By rotating the pulley on the Rotary Motion Sensor,
the Magnetic Field Sensor moves either toward or
away from the Field Coils. Using DataStudio and a
ScienceWorkshop interface, students can produce a
graph of magnetic field strength vs. position.
There is no need to rotate the pulley at a constant rate
as the Rotary Motion Sensor measures its position
using an optical encoder.
Limited Warranty
PASCO scientific warrants the product to be free from
defects in materials and workmanship for a period of
one year from the date of shipment to the customer.
PASCO will repair or replace, at its option, any part of
the product which is deemed to be defective in
material or workmanship. The warranty does not cover
damage to the product caused by abuse or improper
use. Determination of whether a product failure is the
result of a manufacturing defect or improper use by
the customer shall be made solely by PASCO
scientific. Responsibility for the return of equipment
for warranty repair belongs to the customer.
Equipment must be properly packed to prevent
damage and shipped postage or freight prepaid.
(Damage caused by improper packing of the
equipment for return shipment will not be covered by
the warranty.) Shipping costs for returning the
equipment after repair will be paid by PASCO
scientific.
This graph shows the increasing magnetic field as the
sensor is moved toward the first coil, the uniform
magnetic field in between the coils, and the decrease in
magnetic field as the sensors moves beyond the second
coil.
Address: PASCO scientific
10101 Foothills Blvd.
Roseville, CA 95747-7100
Phone: 1-800-772-8700 or
(916) 786-3800
FAX: (916) 786-3292
e-mail: techsupp@pasco.com
Web site: www.pasco.com
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Helmholtz Coil Base 012-07512A
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