PASCO OS-8543 Prism Mount - Manual (Page 2)

Prism Mount 012-07111A
2
Figure 2: Attach the Prism Mount to the
OS-8539 Educational Spectrophotometer
The Prism Mount piece attaches to the top side of light
sensor arm used in the OS-8539 Educational
Spectrophotometer. The beveled stop piece attaches
to the bottom side of the light sensor arm (Figure 1)
and is designed to limit the range that the light sensor
arm travels to less than 90 degrees from the reference
line. The reference line is the straight path in which
parallel rays of light travel from the light source
through the collimating and focusing lenses. ( To
observe the position of the light sensor arm at the
reference line, move the arm until the angle indicator
reads 0 degrees.)
The light spectrum refracted through the prism is
typically observed between 58-62 degrees from the
reference angle. When the stop piece rests against the
angle indicator, the angle is approximately 76 degrees.
The infrared filter and bracket are designed for use
with the PASCO CI-6628 Infrared Light Sensor.
The
bracket comes with the glass filter attached. Use the
infrared sensor for experiments, such as blackbody,
when it desired to measure infrared wavelengths.
Description of Parts
1. Attach the Stop to the Light Sensor Arm
Note: Before attaching the stop, remove the light
sensor arm (if attached) from the degree plate of
the OS-8539 Educational Spectrophotometer.
a) Attach the stop to the light sensor arm using the
two screws provided (Figure 1). Note the
orientation of the stop. Position the beveled
corner of the stop so that it will hit against the
angle indicator on the spectrophotometer table.
Figure 1: Attach the stop piece to the light
sensor arm
beveled corner
light sensor arm
stop piece
PASC O OS
-8543
BLAC K BO
DY P RISM
10 1 100 GAIN
HIGH
SENSITIVITY
LIGHT SENSOR CI-6604
prism mount
tab
0-degree
line
180-degree line
angle indicator
light sensor
3. Attach the Prism Mount to the OS-8539
Educational Spectrophotometer
a) Set the angle indicator on the spectrophotometer
table to zero.
b) Locate the hole in the center of degree plate
resting over the spectrophotometer table. Insert
the threaded post into the center hole and slowly
turn the prism mount until the base of the mount
piece is positioned loosely over the top of the
degree plate (Figure 2).
Note: Do not screw the prism down too tight.
The light sensor arm must be free to rotate under
the prism without touching the prism mount.
c) Rotate the prism mount until it clears the light
sensor arm and the prism is oriented with its
apex pointed in the direction of the light
source. Keep the tab indicator aligned with
the 0 and 180-degree lines on the plate.
2. Mount the Light Sensor Arm to the DegreePlate
a) Align the light sensor arm over the bracketed
markers and the edge holes displayed on the
top surface of the degree plate. Use the thumb
screws to secure the arm to the plate.
b) After securing the arm, check to ensure the arm
rotates throughout the full range between the
reference line (zero mark) and the stop against
the angle indicator (approximately 76 degrees).
light sensor arm