PASCO PK-9023, Instruction Manual And Experiment Manual

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scientific
2
012-04346B
Equipment Setup
Figure 1
e. A plastic template is included with the PASCO
scientific Field Mapper, for drawing circles. (see
Figure 3) Place the template on the conductive
paper and draw the circles with the conductive ink
pen. (If desired, you may first draw the circle
template with a soft lead pencil and trace over the
pencil line with the ink.)
Figure 3
3. Mount the conductive paper on the corkboard using one
of the metal push pins in each corner.
IMPORTANT:
The silver conductive ink reaches its maximum
conductivity after 20 minutes drying time. For
optimal results plan the timetable for conducting the
experiments and correlate drawing the conductive
ink paths accordingly.
1. Plan and sketch the layout (size, shape and relative
spacing) of the charged paths to be studied on a piece of
scratch paper. These paths can be any two dimensional
shape, such as straight or curved lines, circles, dots,
squares, etc. Since the charged paths will actually be
conductive ink electrodes, they will be referred to as
electrodes.
2. Draw the electrodes on the black paper (see Figure 1).
NOTE: This is the most difficult and crucial part
of the experiment. Follow these steps carefully.
a. Place the conductive paper, printed side up, on a
smooth hard surface. DO NOT attempt to draw the
electrodes while the paper is on the corkboard.
b. Shake the conductive ink pen (with the cap on)
vigorously for 10-20 seconds to disperse any
particle matter suspended in the ink.
c. Remove the cap. Pressing the spring loaded tip
lightly down on a piece of scrap paper while
squeezing the pen barrel firmly starts the ink
flowing. Drawing the pen slowly across the paper
produces a solid line. Drawing speed and exerted
pressure determines the path width. (see Figure 2)
Figure 2
d. Once a satisfactory line is produced on the scrap
paper, draw the electrodes on the black conductive
paper. If the line becomes thin or spotty, draw
over it again. A solid line is essential for good
measurements.
The line will be air dry in 3-5 minutes at room
temperature. However, the medium won’t reach
maximum conductivity until after 20 minutes
drying time.