2
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.
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:
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.
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.
Figure 1 Spectral Output
