Vernier Go Direct Light and Color GDX-LC User manual

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is located near the barcode on the
sensor. The Bluetooth LED will
blink green when it is successfully
connected.
7. This is a multi-channel sensor. The
active channel is listed in the
Connected Devices Sensor
Channels list. To change channels,
select the check box next to the
Sensor Channel(s) you would like
to activate.
8. Click or tap Done to enter
data-collection mode.
Charging the Sensor
Connect the Go Direct Light and Color to the included USB Charging Cable
and any USB device for two hours.
You can also charge up to eight Go Direct Light and Color Sensors using our
GoDirect Charge Station, sold separately (order code: GDX-CRG). An LED on
each Go Direct Light and Color indicates charging status.
Charging Orange LED next to the battery icon is solid
while the sensor is charging.
Fully charged Green LED next to the battery icon is solid
when the sensor is fully charged.
Powering the Sensor
Turning on the sensor Press button once. Red LED indicator next to the
Bluetooth icon flashes when the unit is on. Press
button again (after 5 second delay) to turn on/off
the white LED.
Putting the sensor in
sleep mode
Press and hold button for more than three seconds
to put into sleep mode. Red LED indicator next to
Bluetooth icon stops flashing when sleeping.
Connecting the Sensor
See the following link for up-to-date connection information:
www.vernier.com/start/gdx-lc
Go Direct®Light and
Color
(Order Code GDX-LC)
This light sensor measures light in the visible and
ultraviolet electromagnetic spectra. An RGB
color sensor detects relative contributions of
primary colors in light. Go Direct Light and
Color directly connects via Bluetooth wireless
technology or wired via USB to your platform. The sensor can be used for the
study of visible light intensity, UV light intensity, and color investigations.
Note: Vernier products are designed for educational use. Our products are not
designed nor are they recommended for any industrial, medical, or commercial
process such as life support, patient diagnosis, control of a manufacturing
process, or industrial testing of any kind.
What's Included
lGo Direct Light and Color
lMicro USBCable
Compatible Software
See www.vernier.com/manuals/gdx-lc for a list of software compatible with the Go
Direct Light and Color Sensor.
Getting Started
Please see the following link for platform-specific connection information:
www.vernier.com/start/gdx-lc
Bluetooth Connection USB Connection
1. Install Graphical Analysis 4 on
your computer, Chromebook™, or
mobile device. See
www.vernier.com/ga4 for software
availability.
2. Charge your sensor for at least
2hours before first use.
3. Turn on your sensor by pressing
the power button once. The
Bluetooth®LED will blink red.
4. Launch Graphical Analysis 4.
5. Click or tap Sensor Data
Collection.
6. Click or tap your Go Direct sensor
from the list of Discovered
Wireless Devices. Your sensor's ID
1. If using a computer or Chromebook,
install Graphical Analysis 4. If using
LabQuest 2, make sure LabQuest
App is up to date. See
www.vernier.com/ga4 for Graphical
Analysis 4 availability or
www.vernier.com/downloads to
update LabQuest App.
2. Connect the sensor to the USB port.
3. Launch Graphical Analysis 4 or turn
on LabQuest 2. You are now ready
to collect data.
4. This is a multi-channel sensor. To
change the default channel
selections, see
www.vernier.com/start/gdx-lc

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Specifications
Light intensity range 0 lx to 150,000 lx
Maximum light intensity
sampling rate
1,000 samples/s
Resolution ±0.2 lx (when using in less than 10,000 lux);
±5 lx (when using in greater than 10,000 lux)
UV sensitivity range 320 nm to 375 nm
Red, green, blue intensity
range
0 to 1,000 (relative scale)
USBspecification USB 2.0 full speed
Wireless specification Bluetooth v4.2
Maximum wireless range 30 m (unobstructed)
Dimensions 8.8 cm × 6.0 cm × 3.2 cm
Battery 300 mAh Li-Poly Rechargeable
Battery life (single full charge) ~10 hours continuous data collection
Battery life (long term) ~300 full charge cycles (several years
depending on usage)
Safety
Avoid pointing the white LED directly at your eye. The light is bright and may
cause discomfort.
Care and Maintenance
To ensure longest battery life, turn white LED off when not in use.
Battery Information
The Go Direct Light and Color contains a small lithium-ion battery in the case.
The system is designed to consume very little power and not put heavy
demands on the battery. Although the battery is warranted for one year, the
expected battery life should be several years. Replacement batteries are available
from Vernier (order code: GDX-BAT-300).
Storage and Maintenance
To store the Go Direct Light and Color for extended periods of time, put the
device in sleep mode by holding the button down for at least three seconds. The
red LED will stop flashing to show that the unit is in sleep mode. Over several
months, the battery will discharge but will not be damaged. After such storage,
charge the device for a few hours, and the unit will be ready to go.
Exposing the battery to temperatures over 35°C (95°F) will reduce its lifespan. If
possible, store the device in an area that is not exposed to temperature extremes.
Connecting via Bluetooth
Ready to connect Red LED next to the Bluetooth icon flashes
when sensor is awake and ready to connect.
Connected Green LED next to the Bluetooth icon flashes
when sensor is connected via Bluetooth.
Connecting via USB
Connected and charging Orange LED next to the battery icon is solid
when the sensor is connected to Graphical Ana-
lysis via USB and the unit is charging. LED next
to Bluetooth icon is off.
Connected, fully charged Green LED next to the battery icon is solid
when the sensor is connected to Graphical Ana-
lysis via USB and fully charged. LED next to
Bluetooth icon is off.
Charging via USB,
connected via Bluetooth
Orange LED next to the battery icon is solid
when the sensor is charging. Green LED next to
the Bluetooth icon flashes.
Using the Product
Connect the sensor following the steps in the Getting Started section of this user
manual.
In order to turn on the white LED on the sensor face, wait five seconds after
initially turning the sensor on and press the button once. A single press will
toggle this LED on and off.
Channels
Click on the sensor icon to select other channels for this sensor, including
lUV
l615 nm (Red)
l525 nm (Green)
l465 nm (Blue)

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Troubleshooting
Press the power button on the sensor to turn it on. (The Bluetooth LED will
flash red.) Start the Graphical Analysis app on your device and select the
desired sensor from the list of available sensors. If connecting via Bluetooth, the
LED will be steady green. Click on the sensor icon and select the desired
channel(s) from the list of available sensors. Expose the light aperture to a
variety of UV, visible light, or colors and confirm that the sensor reading
responds appropriately. Press the power button to toggle the white LED on and
off.
View additional FAQ's related to this product at www.vernier.com/gdx-lc
Repair Information
If you have followed the troubleshooting steps and are still having trouble with
your Go Direct Light and Color, contact Vernier Technical Support at
[e-mail] or call 888-837-6437. Support specialists will work with
you to determine if the unit needs to be sent in for repair. At that time, a Return
Merchandise Authorization (RMA) number will be issued and instructions will
be communicated on how to return the unit for repair.
Accessories/Replacements
Item Order Code
Micro USBCable CB-USB-MICRO
Micro USB-CCable CB-USB-C-MICRO
Go Direct 300 mAh Replacement Battery GDX-BAT-300
Warranty
Vernier warrants this product to be free from defects in materials and
Water Resistance
The Go Direct Light and Color is not water resistant and should never be
immersed in water.
If water gets into the device, immediately power the unit down (press and hold
the power button for more than three seconds). Disconnect the sensor and
charging cable, and remove the battery. Allow the device to dry thoroughly
before attempting to use the device again. Do not attempt to dry using an
external heat source.
How the Sensor Works
Light Sensor: The sensor uses a silicon photodiode. It produces a voltage that is
proportional to light intensity. The spectral response approximates the response
of the human eye, as shown in this diagram.
UV Sensor: The sensor uses a photodiode sensitive to UVA light. It
incorporates photodiode, amplifiers, and analog/digital circuits into a single
chip using a CMOS process. When the UV channel is activated, it is able to
detect UV intensity and reports this value as a relative term.
RGB Color Sensor: The color sensor uses a combination of sensors that have a
peak response that corresponds roughly to red, green, and blue light. It
incorporates photodiodes, amplifiers, and analog/digital circuits into a single
chip using CMOS process.
The software analyzes the relative contribution of each primary light color based
on a peak response of 615 nm for red, 525 nm for green, and 465 nm for blue.
Each of the sensors will register a light intensity (relative units).

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(1) l’appareil ne doit pas produire de brouillage, et
(2) l’appareil doit accepter tout interférence radioélectrique, même si cela résulte à un brouillage susceptible d’en compromettre le
fonctionnement.
Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux appareils numériques de Classe B prescrites dans
la norme sur le matériel interférant-brouilleur: “Appareils Numériques,” NMB-003 édictée par industrie Canada. L’utilisation est soumise
aux deux conditions suivantes:
(1) cet appareil ne peut causer d’interférences, et
(2) cet appareil doit accepter toutes interférences, y comprises celles susceptibles de provoquer un disfonctionnement du dispositif.
Afin de réduire les interférences radio potentielles pour les autres utilisateurs, le type d’antenne et son gain doivent être choisie de telle
façon que l’équivalent de puissance isotrope émis (e.i.r.p) n’est pas plus grand que celui permis pour une communication établie.
Avertissement d’exposition RF: L’équipement est conforme aux limites d’exposition aux RF établies pour un environnement non
supervisé. L’antenne (s) utilisée pour ce transmetteur ne doit pas être jumelés ou fonctionner en conjonction avec toute autre antenne ou
transmetteur.
Note: This product is a sensitive measurement device. For best results, use the cables that were provided. Keep the device away from
electromagnetic noise sources, such as microwaves, monitors, electric motors, and appliances.
Vernier Software & Technology
13979 SW Millikan Way • Beaverton, OR 97005-2886
Toll Free [phone] • [phone] • Fax [phone]
[e-mail] • www.vernier.com
Rev. 05/02/18
Go Direct, Graphical Analysis, LabQuest, and other marks shown are our trademarks or registered trademarks in
the United States. All other marks not owned by us that appear herein are the property of their respective
owners, who may or may not be affiliated with, connected to, or sponsored by us.
The Bluetooth®word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of
such marks by Vernier Software & Technology is under license. Other trademarks and trade names are those of
their respective owners.
workmanship for a period of five years from the date of shipment to the
customer. This warranty does not cover damage to the product caused by abuse
or improper use. This warranty covers educational institutions only.
Disposal
When disposing of this electronic product, do not treat it as household waste. Its
disposal is subject to regulations that vary by country and region. This item
should be given to an applicable collection point for the recycling of electrical
and electronic equipment. By ensuring that this product is disposed of correctly,
you help prevent potential negative consequences on human health or on the
environment. The recycling of materials will help to conserve natural resources.
For more detailed information about recycling this product, contact your local
city office or your disposal service.
Battery recycling information is available at www.call2recycle.org
Do not puncture or expose the battery to excessive heat or flame.
The symbol, shown here, indicates that this product must not be disposed of
in a standard waste container.
Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
FCC Caution
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference and
(2) this device must accept any interference received, including interference that may cause undesired operation
RF Exposure Warning
The equipment complies with RF exposure limits set forth for an uncontrolled environment. The antenna(s) used for this transmitter must
not be co-located or operating in conjunction with any other antenna or transmitter. You are cautioned that changes or modifications not
expressly approved by the party responsible for compliance could void your authority to operate the equipment.
IC Statement
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired operation of the device.
Industry Canada - Class B This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus
as set out in the interference-causing equipment standard entitled “Digital Apparatus,” ICES-003 of Industry Canada. Operation is subject
to the following two conditions: (1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired operation of the device.
To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically
radiated power (e.i.r.p.) is not more than that permitted for successful communication.
RF exposure warning: The equipment complies with RF exposure limits set forth for an uncontrolled environment. The antenna(s) used
for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de licence. L’exploitation est
autorisée aux deux conditions suivantes :