PASCO OS-9102C User Manual

Instruction Manual for
the PASCO scientific
Model OS-9102C

INCANDESCENT LIGHT SOURCE

012-07133A

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$2.00

INCANDESCENT LIGHT SOURCE

Description

The PASCO Scientific Incandescent Light Source, OS­9102C is intended to be used by students in an educational
environment to perform experiments in basic optics.

The Incandescent Light Source produces a light output of
approximately 15 candle power in the visible spectrum. It
is powered by a very stable, well-regulated power supply
that ensures the light source output will not drift in
intensity. The output is bright enough and stable enough to
perform demanding experiments such as investigations into
Young's coherence.

The Incandescent Light Source mounts magnetically to the
PASCO Introductory and Advanced Optics System's optical
benches. A knob is provided on the top of the unit to adjust
the filament position of the lamp.

10101 Foothills Blvd. • P.O. Box 619011 • Roseville, CA 95678-9011 USA

Phone [phone] • FAX [phone] • email: [e-mail]

Operating Instructions

1. Place the light source on the optical bench with its
steel pads on the bottom touching the magnetic strips
on the bench, and its back edge pressed up against the
alignment rail of the optical bench. To minimize
bending of the optical bench, it is advisable to place
the light source near one end of the bench.

2. Connect the light source to the 12 VDC, 2.5 A power
supply provided. Connect the AC line cord to the
power supply and to an appropriate power source.

3. When necessary, adjust the large knob on top of the
light source to align the bulb filament along the optical
axis of the optical bench. The bulb filament will move
in the same direction that the knob is turned.

4. Mount filters, apertures, variable diaphragms, etc. on
the magnetic surface of the front panel.

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012-07133A

Replacement of bulbs

1. Turn light source switch to OFF and disconnect the
power cord.

2. Remove the four screws from the front panel (the panel
with the 22 mm diameter hole in its center).

3. Gently push the bulb back against the socket, turn the
bulb counter-clockwise, and remove the bulb. (The
bulb has a standard “twist to lock” type bayonet
socket.)

4. A new #93 bulb is inserted by reversing the operation
in step 3.

Note: When replacing the front panel, make
certain that the bottom edge of the panel does not
hang below the bottom surface of the light source.
If the bottom edge of the panel does hangs below
the bottom surface, it will hinder the steel pads
from making proper contact with the optical
bench.

Figure 1 Spectral Output

Troubleshooting

If the bulb fails to light: The most common cause for this
situation is a burned-out bulb. Remove the bulb, and check
to see if the filament is broken.

Note: A filament may not appear broken to the
unaided eye. Therefore, it is recommended that in
case of doubt, check filament continuity with an
ohmmeter.

If the product is under warranty, or repairs by PASCO
scientific are desired, please refer to the Equipment Return
section in this manual. If you desire to perform repairs,
necessary technical data is provided.

Caution:

Light Source Specifications

Output: Approximately 15 candle power

For spectral output see Figure 1.

Filament temperature: 2700 °K
Bulb: #93 operated at 12 V , 1.1 A, lifespan

approximately 700 hours

Regulation: Maximum light output change is <1%.
Distance from filament to front panel light opening:

approximately 22 mm

Power Supply Specifications

Input: 100-250 V~

47-63 Hz

0.9 A maximum

Output: 12 V

2.5 A maximum

Note: Power supply is short circuit protected.

The lamp generates considerable heat, and after
continuous operation the light source housing will
become warm to the touch.

It is recommended, therefore, that you turn on the
light source only when setting up and for the
duration of the experiment.

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