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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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