PASCO OS-8539 Educational Spectrophotometer - Manual (Page 12)

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E d u c a t i o n a l S p e c t r o p h o t o m e t e r A c c e s s o r y K i t a n d S y s t e m S e t U p
8
Mounting the Grating Mount
The threaded rod on the bottom of the Grating
Mount has a lock washer and a wing nut. Remove
the lock washer and wing nut from the threaded rod,
and screw the threaded rod into the short threaded
post in the center of the Degree Plate. Do not screw
the Grating Mount all the way down onto the Light
Sensor Arm. The Grating Mount must be slightly
above the Light Sensor Arm so the Degree Plate can
move.
Use the Light Sensor Arm to rotate the Degree Plate
until the zero line on the Degree Plate is aligned
with the index mark on the Spectrophotometer Base
Turn the Grating Mount so it is aligned with the
zero line on the Degree Plate and the label side of
the Grating Mount faces away from the sensor on
the Light Sensor Arm.
Put the lock washer and wing nut back onto the threaded rod and tighten the wing nut until the Grating Mount
remains in place when the Degree Plate is rotated in either direction (Fig. 12).
Mounting the Spectrophotometer Base on the Optics Bench
You can mount the components of the Spectrophotom-
eter on the 1.2 meter Optics Bench that is part of the
OS-8515 Basic Optics System, or the 0.6 meter (60
cm) Optics Bench that is included with the OS-8539
Spectrophotometer System. The Spectrophotometer
Base mounts into the T-slots on the sides of the Optics
Bench and the Collimating Slits and Collimating Lens
snap into the center of the Optics Bench.
To mount the Spectrophotometer Base on the Optics
Bench, loosen the thumbscrew on each side of the
Base so the square nuts can slip into the T-slots on the
sides of the Optics Bench. Insert the square nuts into
the slots and slide the Base along the bench until it is
about 20 cm from the end (Fig 13). Tighten the thumb-
screws to hold the Base firmly on the bench.
Rod Stand Mounting Clamps
You can adjust the height or angle of the Optics Bench using the
Rod Stand Mounting Clamps and two rods and bases (not
included). Each clamp has a thumbscrew and a square nut at
one end, and a second thumbscrew at the other end. The thumb-
screw with the square nut holds the clamp onto the bench, and
the other thumbscrew holds the clamp onto a rod. The clamp
has grooves on one side that match the lower lip of the optics
bench.
To mount the clamp on the bench, loosen the square nut and
then slide the square nut into the T-slot at the end of the optics
bench. Line up one of the grooves in the clamp with the lower
lip of the optics bench. Tighten the thumbscrew (Fig. 14).
Align the zero line on
the Degree Plate with
the index mark.
Zero
line
Fasten the mount
with the lock washer
and wing nut
Figure 13: Base onto Optics Bench (end view)
Spectrophotometer
Base
Optics Bench
Square nut
Thumbscrew
T-Slot
Figure 14: Mounting Clamp onto Optics Bench
Top view
Put support
rod here.
Slide groove onto lip.
End view
Line up the edge of
the Grating Mount
with the zero line.
Figure 12: Grating Mount onto Rotating Table