Instruction Sheet
for the PASCO
Model OS-9287B
Sodium Light Source
012-05364C
Phone (916) 786-3800 • FAX (916) 786-8905 • TWX 910-383-2040
10101 Foothills Blvd. • P.O. Box 619011 • Roseville, CA 95678-9011 USA
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IMPORTANT
TO AVOID ELECTRIC SHOCK
THE POWER CORD PROTECTIVE
GROUNDING CONDUCTOR MUST
BE CONNECTED TO GROUND.
REFER SERVICING T0
QUALIFIED PERSONNEL.
DISCONNECT INPUT POWER
BEFORE REPLACING BULB.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
Turn on lamp 20 minutes before
use. Avoid turning lamp on and
off for short periods.
LAMP CONTAINS ELEMENTAL
SODIUM. CONSULT YOUR
MANUAL for replacement and
disposal of bulb.
Na
LIGHT
SOURCE
ON
OFF
FOR CONTINUED FIRE PROTECTION
REPLACE ONLY WITH 4.0A, 250 V,
TYPE T FUSE, (PER IEC 127-2/III).
DISCONNECT INPUT POWER
BEFORE REPLACING FUSE.
LINE VOLTAGE RANGE: 108 - 132 VAC
POWER: 125 W MAX
FREQ.: 47 - 63 HZ
OS-9287
~
115 VOLTS
FOR CONTINUED FIRE PROTECTION
REPLACE ONLY WITH 2.0A, 250 V,
TYPE T FUSE, (PER IEC 127-2/III).
LINE VOLTAGE RANGE: 198 - 242 VAC
POWER: 125 W MAX
FREQ.: 47 - 63 HZ
220 VOLTS
~
FOR CONTINUED FIRE PROTECTION
REPLACE ONLY WITH 2.0A, 250 V,
TYPE T FUSE, (PER IEC 127-2/III).
LINE VOLTAGE RANGE: 216 - 264 VAC
POWER: 125 W MAX
FREQ.: 47 - 63 HZ
240 VOLTS
~
Fuse (3.15 amp, slo-blo for OS-9287B)
(1.6 amp, slo-blo for OS-9287B-220)
ON/OFF Switch
Rails for
mounting filters
To grounded
115 VAC, 60 Hz or
220V, 50 Hz outlet,
depending upon model.
The spectrum for the lamp is shown below. Better than
99.5% of the visible output is in the sodium doublet at
5889* and 5895* angstroms. Slight impurities (1% neon
and argon) are added to the sodium gas to improve operating
efficiency. Because of this, the lamp is not recommended
for use with instruments having a resolving power in excess
of 1 part in 10
4
. The sodium pressure in the lamp is 5
microns Hg.
Introduction
The PASCO scientific Model OS-9287B Low Pressure
Sodium Light Source provides 6 candela/cm
2
, with better
than 99.5% of the visible output in the 5889 and 5895
angstrom spectral lines. The light source comes with a built-
in power supply so the unit can be powered from a standard
115 VAC, 60 Hz or 220 VAC, 50 Hz outlet, depending
upon the model. Cooling fins and air vents on the sturdy
aluminum case ensure cool, safe operation. The rails on the
front and rear of the case allow easy mounting of standard 2-
inch by 2-inch filters.
To operate the light source, simply plug it into a grounded
115 VAC outlet; then flip the switch on the front of the light
source to On. Allow approximately 20 minutes warm-up
time. (The first time you use your light source, you will
need to install the sodium lamp. See the following page for
initial setup instructions.)
Important Note—For maximum lamp life:
1. Always operate the light source in its upright
position. Operation in other orientations will
severely reduce the life of the lamp.
2. If you are going to use the light source more
than once during the day, leave it on. Lamp wear
results more from turning the light source on and
off than from steady operation.
© 1994 PASCO scientific
This instruction sheet edited by: Dave Griffith
300 400 500 600 700 800
*
589.2 (the average of the
doublet)
819
wavelength (nm)
Note: Spectral lines
(of very low intensity)
also occur at 497.8,
515.4, and 616.0 nm.
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(23 pages)
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