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Spectra
Candela III Traffic Signal Light Tester
Measures Degradation and
Intensity of LED Traffic Signals |
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INTRODUCTION:
The Spectra Candela
III Traffic Signal Light Tester measures luminous
intensity and light output degradation of Red,
Yellow and Green LED signal modules in order to meet
mandated minimum safety standards.
Spectra Candela III Traffic Signal Light Tester Model
2000 is a versatile, precision, portable multiple
channel Photometer/Radiometer. Its’ specifically Custom
Configuration allows unit for measuring luminous
intensity, illuminance, luminance, irradiance, radiance,
radiant energy, and many other special parameters.
Specifically configured calibrated channels can also be
used to measure luminous intensity [Candlepower in
candelas (Cd)] of Red, Yellow, and green LED traffic
signal modules and Photometric brightness Red, Yellow
and Green Arrows (foot-lamberts/cd/m2). Calibration and
indication of the proper readout unit is accomplished
automatically when the switches are set and the proper
accessories/attachments are installed.
The TSL tester can measure luminous
intensity of LED signal modules and photometric
brightness of LED signal
arrows. The measuring capability and sensitivity
range of the instrument is given in Instrument
Specifications. LED
Traffic Signal Light Maintenance The
transportation industry demands a portable, calibrated
light meter (photometer) for field measurement of light
output degradation of Light Emitting Diode (LED) traffic
signal light emission.
There are number of inherent problems with LEDs. One
critical issue is degradation. Instead of burning out
catastrophically, like the incandescent lamps they
replace, LED lamp light output continuously degrades
(dims) as a function of time and temperature. Rarely
does an LED lamp exhibit complete burnout. As an
example, the subtle, continuous decrease in light output
of a red stoplight eventually results in impaired
visibility, leading to a potential traffic safety
hazard.
Responding to industry requests, the Company
introduced a Traffic Signal Light (TSL) field tester and
currently has more than 300 systems in the field,
including several units approved and purchased by
California Department of Transportation (Caltrans) and
other municipalities and states.
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SPECIFICATIONS:
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Type:
Hand held Photometer/Radiometer that can be used to
measure luminous intensity, illuminance, luminance and
many other special parameters. This instrument can be
custom configured for your application.
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Technology: For highest accuracy and
reliability the Tester utilizes advanced front-end
electronics, Custom Sealed Hybrid circuitry, Multiple
Range Linear Circuit controlled by embedded
microcomputer and a custom liquid crystal display with
backlit electroluminescent lamp.
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Light Sensor: Silicon Photovoltaic
Detector.
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Sensitivity Range: With English
calibration, Illuminance levels: 0.1 to 70,000
foot-candles; Luminance levels: 0.1 to 70,0000
foot-lamberts. With Metric (SI) calibration, Illuminance
levels: 1 to 100,000 lux; Luminance levels: cd/m2.
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Luminous Intensity [(Candlepower in candelas (cd)]:
The Tester is calibrated to measure traffic signal light
modules Candlepower directly.
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Luminance: Photometric Brightness in foot-lamberts
and cd/m2. The Tester
is calibrated to measure luminance directly of the
traffic signal light modules "Arrow".
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Memory:
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The Memory Store and Recall functions
are available on Models SK-TSL-2000 and BK-TSL-2000. You
may store one measurement in memory by pressing the
‘STR’ switch for later recording or tracking
degradation.
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The advanced memory functions are
available only on Model ST-TSL-2000. When Mode selection
switch is activated and the Ratio or Average annunciator
is displayed, you may recall the stored reading in
memory-1 (M1), current reading in memory-2 (M2) and or
the Ratio and Average of the two readings by pressing
the ‘RCL’ switch.
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Absolute Photometric Accuracy:
± 5% of
full scale (when measuring blackbody sources).
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Repeatability: ± 1% of the full-scale on
any range (at constant temperature).
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Power: One 6-volt silver oxide or lithium
battery (Eveready 544,L544 or equivalents).
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Warranty: One year limited warranty.
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All Spectra Candela III Traffic Signal Light Testers are
supplied with :
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Light Integrator
• Carrying case
• Instruction Manual
• N.I.S.T traceable
calibration
• 6V Battery
* Operating Temperature
Range: 32˚F to 130˚F (0˚C to 55˚C).
* SPECIFICATIONS SUBJECT TO CHANGE WITHOUT
NOTICE.
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ACCESSORIES:
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CR-2000:
The Cosine Receptor is
specifically designed for cosine-corrected illuminance/
irradiance measurement. The specially designed white
molded plastic diffuser receptor provides cosine
correction to a high degree of refinements; thus the
detector correctly evaluates the light level regardless
of the direction. |
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SA-2000-1: The Spot Attachment is a unique
optical accessory that converts the Spectra Tester into
a high- sensitivity 2° or 5° Spotmeter for narrow-angle
reflected-light measurements. The Spot Attachment
enables accurate luminance measurements of distant
objects particularly useful for making accurate object
contrast or ratio measurement. The Spot Attachment
features a bright, erect, wide-field (12°), life-size
optical system. A sharp reticle in the eyepiece
accurately defines 2° or 5° measuring field. |
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LR-2008 (4", 2", 1.5",.205"): The LED
Receptors are accessories calibrated for LED and LED
cluster measurement of axial luminous intensity
(candlepower). The unit of measure is also called
"candela". The full-scale sensitivity range of the
Spectra Tester with LR-2008 is 0.1 to 100,000 candelas.
The Receptor consists of a 12-inch long black aluminum
anodized tube with an LED (LED cluster measurement) port
on one end and a hemispherical shaped diffuser at the
other end. The diffuser end attaches to the front of the
Tester's detector head assembly. Other adapters can be
provided for specific custom configuration. |
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LA-2000-14: The Luminance Adapter modifies
the angular response of the Tester to 14 degrees it is designed
and calibrated to measure the surface luminance and
radiance of LED clusters, back-lit sources or CRTs. The
final readings are displayed in foot-lamberts or cd/m2. |
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LI-20008 & LI 200012 Light Integrator: Light Integrator assembly is designed to measure LED
intensity in order to keep track of LED degradation of
the traffic signal modules. Light Integrator is
geometrically shaped design (hemispheric shape). The
inner side of the Light Integrator is white diffused
Reflectance Standard material and an opaque diffuser
assembly is attached on the front end. Light Integrator
integrates and/or averages the effect of all the LED’s
intensity and weighs them proportionally. Rear port of
the Light Integrator attaches to the Spectra Candela’s
detector head assembly. The front end of the Light
Integrator fits flush against and totally covers the
traffic light module to be measured. |
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All Available Models
You may order Spectra Candela
III TSL Model 2000 with the pre-selected and calibrated
attachments and accessories for your particular
applications.
Available Models -
for USA
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SK-TSL-2000
STARTER KIT:
Spectra Candela III Tester; "Single channel",
LI-20012- 12" (300mm), LI-2008- 8"(200mm) Light
Integrator for (C1) Red, (C2) Yellow OR (C3)
Green LED signal modules. Foam Lined carrying case.
One year limited warranty.
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BK-TSL-2000 BASIC
KIT :
Spectra Candela III Tester; "Three Channel",
LI-20012- 12" (300mm), LI-2008- 8"(200mm) Light
Integrator for (C1) Red, (C2) Yellow AND (C3)
Green LED signal modules. Foam Lined carrying case.
One year limited warranty.
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ST-TSL-2000
STANDARD KIT :
Spectra Candela III Tester; "Six Channel",
LI-20012- 12" (300mm), LI-2008- 8"(200mm) Light
Integrator for (C1) Red, (C2) Yellow AND (C3)
Green LED signal modules, AND 12" (300 mm) Luminance
Adapter for Red, Yellow AND Green LED signal ARROWS.
Foam Lined carrying case. One year limited warranty.
Available Models -
for Europe
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BK-TSL-2000 BASIC
KIT :
Spectra Candela III Tester; "Three Channel",
LI-2008- 8"(200mm) Light Integrator for (C1) Red, (C2)
Yellow AND (C3) Green LED signal modules. Foam
Lined carrying case. One year limited warranty.
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