Setup – PASCO OS-8542 BLACK BODY LIGHT SOURCE User Manual
Page 9
012–07105B
Black Body Instruction Manual
5
Setup
PASCO
OS-8543
BLACK BODY PRISM
10
1
100
GAIN
HIGH
SENSITIVITY
LIGHT SENSOR
CI-6
604
Figure 4: Attach the stop piece to the
light sensor arm
stop piece
light sensor arm
prism mount
This section describes the procedure for mounting the light sensor arm, prism mount and black body light
source. For more detailed instructions about setting up the spectrophotometer table and rotary motion sensor,
see the PASCO OS-9539 Educational Spectrophotometer System Instruction Manual. Before proceeding,
calibrate the rotary motion sensor, as described in the “Calibration” section on page 9 of this manual.
Figure 5: Mount the Light Sensor Arm to the
Degree Plate
Figure 6: Attach the Prism Mount to the
Spectrophotometer Table
angle
indicator
degree
plate
light sensor arm
pinion
angle
indicator
1. Attach the Stop to the Light Sensor Arm
Attach the stop to the light sensor arm using the two screws
provided (Figure 4). 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.
2. Mount the Light Sensor arm to the Degree Plate
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.
After securing the arm, check to ensure that the arm rotates
throughout the full range between the zero mark and the
stop.
3. Attach the Prism Mount to the Degree Plate and
Spectrophotometer Table
Remove the wing nut and lock washer from the prism
mount. Set the angle indicator on the spectrophotometer
table to zero. Locate the hole in the center of the circular
table on the spectrophotometer. Screw the prism mount
into this center hole (Figure 6).
Note: Do not screw it down tight. The light sensor
arm must be free to rotate under the prism without
touching the prism mount.
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, and the prism mount bracket is
aligned with the 0 and 180 degree lines on the plate.
Check to see that the angle indicator on the degree plate is
set to zero and the tab indicator on the prism mount is
aligned parallel to the 180-degree line on the plate. From
the bottom side of the degree plate, place a lock washer
and wingnut on the threaded post to help secure the prism
mount onto the table.
beveled corner
zero-degree
mark
0
tab indicator
180-degree mark