Spectroline 11SC-1 User manual

OPERATOR’S MANUAL
11SC-1, 11SC-2 and 36-380
Miniature Ultraviolet Quartz Pencil Lamps
and SCT-1A Power Supply
Manual No. 86007-3
Printed in U.S.A. Issued: November 2004
Recycled
Paper

DANGER – Ultraviolet radiation emitted from
this product. Avoid exposure. ALWAYS WEAR PROTECTIVE
CLOTHING. EXPOSURE MAY CAUSE PREMATURE AGING OF THE
SKIN AND CANCER. ALWAYS WEAR PROTECTIVE EYEWEAR;
FAILURE TO DO SO MAY RESULT IN SEVERE BURNS OR LONG
TERM INJURY TO EYE. Never look directly into the lamp.
Exposure can cause eye and skin allergy and allergic reac-
tions. Medications or cosmetics may increase your
sensitivity to ultraviolet radiation. Consult physician before
operating this product if you are using medication or have
a history of skin problems or believe yourself especially
sensitive to sunlight.
For Professional Use Only
WARNING
Please read the instructions in this manual carefully before
using your Spectroline®UV quartz lamp. Never use this
equipment in any manner not specified in these instructions
because the protection provided by the equipment may be
impaired. We recommend using Spectroline UV-absorbing
protective eye and face wear (i.e., UVS-30 spectacles, UVG-50
goggles or UVF-80 face shield).
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LAMP CONTAINS MERCURY
Manage in Accord with Disposal Laws
See: www.lamprecycle.org

INTRODUCTION
The Spectroline 11SC-1, 11SC-2 and 36-380 quartz pencil lamps
are small, low-pressure, mercury vapor discharge lamps made of
double-bore material with both electrodes at one end. When
used properly, they are very stable lamps and maintain a high
output of ultraviolet radiation over several thousand hours.
These pencil lamps have a spectral emission characteristic of a
low-pressure mercury discharge consisting of many well-separated
lines in the ultraviolet, visible and infrared parts of the spectrum
(see figures 1 and 2). They are widely used as spectral calibration
sources in spectroscopy, chromatography and photometry, and
many other laboratory and industrial applications.
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FIGURE 1
SPECTRAL IRRADIANCE OF SPECTROLINE 11SC-1 AND 11SC-2 QUARTZ PENCIL LAMPS
FIGURE 2
SPECTRAL IRRADIANCE OF SPECTROLINE 36-380 QUARTZ PENCIL LAMP

• The 11SC-1 is a short wave (254nm) ultraviolet lamp with a
lighted tube length of 2 1/8 in (5.4cm), 1/4 in (0.64cm) outside
diameter (OD). It may be used alone or with any of three
separately available light shields, each with a different aperture
for directing the light.
• The 11SC-2 is a short wave UV lamp with a lighted tube length
of 3/4 in (1.9cm), 1/4 in (0.64cm) OD. Because of its shorter
length, no light shields are available.
• The 36-380 is a long wave (365nm) UV lamp with a lighted
tube length of 2 1/8 in (5.4cm), 3/8 in (0.95cm) OD. The lamp is
encased in a tubular glass filter that absorbs visible white light
while transmitting maximum UV intensity.
INSTALLATION
UNPACKING AND INSPECTION
Unpack the pencil lamp and power supply and inspect them
thoroughly for possible damage from shipment. Check the
electrical performance as soon as possible according to the
instructions below. If damage is noted, immediately notify the
carrier and supplier before using the equipment.
Save the shipping cartons and packing materials for future storing
and shipping of the lamps or power supply.
PREPARATION FOR USE
The Spectroline SCT-1A and SCT-1A/F power supplies are available
separately. They provide correct electrical characteristics to
operate the 11SC-1, 11SC-2, and 36-380 lamps efficiently. Only
properly matched lamps and power supplies, as specified by
Spectronics Corporation, should be paired together for operation.
WARNING—HIGH VOLTAGE
Make certain that the power supply is unplugged from electrical
outlet when installing pencil lamps.
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3. UV Filter
4. Pencil Lamp
Cord
DESCRIPTION
1. Quartz Tube Emits ultraviolet light.
2. Lamp Handle Insulating material protects user from
voltage transferred from power supply
and from heat produced by lamp.
3. UV Filter Absorbs visible light and transmits long
(36-380 lamp only) wave ultraviolet light.
4. Pencil Lamp Cord Transfers power from SCT-1A power
supply to pencil lamp.
5. On/Off Switch Connects/disconnects power to lamp.
6. Cord and Female Point of connection of lamp
Connector cord to power supply.
7. Power Supply Cord Supplies power from AC outlet.
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1. Quartz Tube
2. Lamp Handle
11SC-1
36-380
5. On/Off Switch 6. Cord and Female
Connector
7. Power Supply
Cord
SCT-1A

OPERATION
WARNING
Avoid handling the quartz tube of the pencil lamp with fingers.
Skin oils will etch the tube surface. Always use a clean cloth or
gloves.
PRELIMINARY CHECKS
1. The toggle switch of the power supply should be in the "OFF"
position before it is plugged into the AC outlet.
2. Make sure the lamp is securely connected to the power supply
before the system is turned on.
3. Make sure that the power supply is connected to an electrical
outlet that conforms to the power requirements noted on the
label.
GENERAL OPERATION
After reviewing preliminary precautions, plug the power supply
into an appropriate AC outlet. Point the pencil lamp toward the
area to be illuminated and switch the power supply on.
IDEAL OPERATING CONDITIONS
The minimum temperature on the inside surface of its quartz tube
(usually at the tip) determines the quality of a pencil lamp’s
output. This temperature results from heat generated by the
lamp itself, as well as from heat transferred to or from the lamp
through any portion of the lamp. Optimum 254nm output is
achieved when the lamp surface temperature is approximately
149°F (65°C). Deviations will lead to less than optimum output.
Thus, the lamp’s performance depends on how and where it is
used, as well as its construction. Aluminum-handled lamps, for
example, may not operate optimally because of heat loss through
the handle. Many users insulate or attach such lamps to heaters
to maintain optimum output. Alternatively, insufficient heat loss,
which may happen when using a phenolic-handled lamp in a
small enclosure, can cause the lamp to run at higher than optimal
temperatures. Ventilation can lower the temperature of the lamp
surface, but irregular ventilation may result in unstable operation.
Please note that less than ideal use of the lamp may reduce lamp
life via electrode destruction or stress on the metal-glass seals
inside the lamp.
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POLAR INTENSITY PROFILE
All double-bore pencil lamps, such as the 11SC-1, 11SC-2 and
36-380, produce uneven irradiance around their quartz tubes,
especially at close range. Distinct areas of lower irradiance
occur near the glass-dividing wall, which is visible inside the tube
between the two electrodes. Figure 3 illustrates the relative
intensities around the 11SC-1 and 11SC-2 lamps, with respect to
this wall.
When a phosphor-coated lamp, such as the 36-380, is used, this
variation is less pronounced. The irradiance pattern resembles a
broad ellipse, with its shortest radius in line with the wall.
OPERATION ON DC CURRENT
DC operation is strongly discouraged because migration effects
in the lamp can lead to eventual extinction of the discharge.
Furthermore, the lamp is mechanically designed for AC operation,
being made with identical electrodes.
However, if DC operation is necessary the polarity of the
electrodes should be reversed periodically to counteract the det-
rimental polarizing effects of this type of operation. The period will
depend upon the lamp temperature, the electrical current in the
lamp, and the reduction in intensity that can be tolerated.
NOTE: The Spectroline SCT-1A and SCT-1A/F power supplies are
specified for AC operation only.
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10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
FIGURE 3
POLAR DIAGRAM OF TYPICAL IRRADIANCE AT 1/2" FROM THE SURFACE OF
SPECTROLINE 11SC-1 AND 11SC-2 QUARTZ PENCIL LAMPS

ACCESSORIES
USING 11SC-1 WITH LIGHT SHIELDS
Light shields are available separately for the 11SC-1 lamp with
different apertures for directing the light source.
• Shield A has a 0.04 in (0.10cm) ID drill hole and is used where
point emission is desired.
• Shield B has a 5/16 x 5/8 in (0.79 x 1.59cm) window and is
frequently used as a source shield for interferometers.
• Shield C has a larger window, 3/16 x 11 /2 in (0.48 x 3.8cm) and is
widely used in calibrating spectrophotometers.
To operate, slip the open end of the light shield over the 11SC-1
lamp tube. The base of the shield should fit snugly over the lamp
handle. With the power supply switched "on," point the open part
of the shield toward the area to be illuminated.
USING 11SC-1 WITH 2537FA FILTER ASSEMBLY
For applications in which "pure" short wave UV radiation is required,
the 2537FA filter assembly (available separately) absorbs visible
light and primarily transmits 254nm radiation.
Installation and operation of the 2537FA filter assembly with the
11SC-1 is identical to that of the light shields (above).
WARNING
If the filter assembly is hand-held, UV-absorbing face wear (such
as the Spectroline UVF-80 face shield) and protective clothing is
strongly advised. Short wave pencil lamps produce hazardous
ultraviolet radiation. Do not expose eyes or skin.
MAINTENANCE
As with all metal vapor discharge lamps, the output of the quartz
pencil lamp slowly decreases throughout its life. The actual end of
the useful life will depend upon the lamp’s application.
Note that dust collecting on the lamp can easily cause more
output loss at the irradiated surface than that caused by the age
of the lamp. To maintain maximum intensity, the lamp should be
periodically cleaned (after power has been shut off) with an
alcohol-dampened, lint-free cloth.
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STORAGE
All components should be stored in a place free from tempera-
ture or humidity extremes, vibration or mechanical shock, dust
or corrosive fumes, and strong electrical or electromagnetic
interference. (Using the lamp in such areas should also be
avoided).
ENVIRONMENTAL CONDITIONS
These UV pencil lamps are designed to be safe under the
following conditions:
• Indoor use;
• Altitude up to 2,000 m (6,562 ft);
• Temperature 5°C to 40°C (41°F to 104°F);
• Maximum relative humidity 80% for temperatures up to 31°C
(88°F) decreasing linearly to 50% relative humidity at 40°C
(104°F);
• Mains supply voltage fluctuations not to exceed ± 10% of the
nominal voltage;
• Installation Category II;
• Pollution Degree 2.
WARRANTY
The warranty policy for the Spectroline UV quartz pencil lamps
is provided on the Certificate of Limited Warranty enclosed
separately with each unit.
NOTE: For assistance of any kind, including help with a unit
under warranty, contact the Customer Service Department at
Spectronics Corporation. In the U.S. and Canada, call toll-free
1-800-274-8888. Give full details of the difficulty and include the
model and serial numbers of the unit and the date of purchase.
If return of the unit to the factory is deemed necessary, shipping
instructions will be provided. If an estimate of charges for
nonwarranty work or other services is required, a quote will be
furnished upon evaluation of the unit. Out-of-warranty service
work will not be performed without customer approval.
SHIPPING
Carefully pack the unit in the original shipping container and
packing materials. Insure it for full value and ship it prepaid to
the factory.
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TROUBLESHOOTING
Symptom Probable Cause Cure
1. Will not light (a) Lamp temperature (a) Warm lamp in hand
too cold (with power off) or
store/use lamp in
warmer environment
(above 60°F/15.6°C)
(b) Power supply voltage (b) output too low
Replace power
supply
(c) Lamp cracked (c) Replace lamp
(d) Lamp life expired (d) Replace lamp
(e) Lamp not connected (e) Check lamp/power
to power supply connections
2. Abnormally (a) Lamp at end of useful life (a) Replace lamp
low intensity (b) Lamp being used in (b) Regulate tempera-
emitted temperature-extreme ture or air circulation
environment
(c) Current from power (c) Replace power
supply to lamp too low supply
(d) Lamp dirty (d) Clean lamp
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