GPS Prueftechnik Digital Colour Analyzer Manuel utilisateur
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User Manual for Digital Colour Analyzer
GPS Prueftechnik GmbH
www.gps-prueftechnik.de
E-Mail: info@gps-prueftechnik.de
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1. LED Digital Colour Analyzer
1.1 Mounting the Digital Colour Analyzer
1.2 Mounting the fiber-optic
1.3 Cutting the fiber
2. Interface and Power Wiring
2.1 Mounting a stand-alone unit
2.2 Mounting connected units
2.3 Mounting interconnected units for USB
2.4 Mounting interconnected units for RS 232
3. Setting the Digital Colour Analyzer
3.1 The Digital Colour Sensor
3.2 Setting an offset to calculate the components of the standard colour values x and y
3.3 Manual for the GPS LED Analyzer Software
3.3.1 The main screen of the LED Analyzer Software with PopUp-menus
3.3.2 Configuration of the LED Analyzer
3.3.3 To perform a measurement by using the functional elements of the main screen
3.3.4 To perform a measurement and compare several LEDs by using
“Measurement Window” and “Settings Window”.
3.3.5 How to use “Terminal Modes”
4. List of Commands for the LED Analyzer
Table of contents:
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1.LED Digital Colour Analyzer
The construcon of the xture is one of the most crical aspects of a successful implementaon of the Digital Colour
Analyzer. If this step is implemented properly the resulng tests will be more stable and repeatable with low risk of
false failures.
Figure 1: GPS Digital Colour Analyzer
1.1 Mounting the Digital Colour Analyzer
The LED Analyzer can be mounted on the top as well as on the bottom side of the fixture.
When mounting the LED Analyzer be careful that the fibers can move freely and are not exposed to sharp bends.
The minimum bend radius is 15 mm. Sharper bends can cause a loss of light which can affect the measurements.
In order to get a clean measurement it must be guaranteed that all light from the LEDs can travel through the fiber
to the sensor on the board.
Figure 2: Mounting measurements
The mounting holes will accept M3 screws. Take care that the mounting holes are connected to the unit
ground
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1.2 Mounting the fiber optic
Figure 3: Plastic Fiber
Figure 4: Positioning the Fiber
The fiber must be located over optical centre of the LED. For further information please look up the producers
datasheet. The gap between the LED and the fiber should be 1 - 3 mm.
This must be find out empirical in individual cases.
Figure 5: Offset and Gap
The intensity of a measurement depends strongly on the gap and the offset from the LED to the fiber.
Construction of the fixture is one of the most critical aspects of a successful implementation of a LED Colour
Analyzer. If this step is implemented properly the resulting tests will be more stable and repeatable with a low
risk of false measurements.
Some important characteristics of the fiber are:
Minimum bend radius 10mm
Operating temperature range –40 to +70 C°
Numerical aperture 0.5
Angle of incidence ca. 60 degrees
Attenuation at 650 nm 0,18 dB/m (ca. 2%/m)
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1.3 Cutting the Fiber
The fibers of the LED Analyser are delivered standardly with a length of about 600 mm.
To avoid damages it is recomended to shorten the fibers to the correct length.
While cutting take care that the fiber is in a 90° to the razor otherwise a loss of light has to be expected.
It is recommended to use each hole only once in order to guarantee a clean cut of the fiber.
2. Attachment for thin fibers:
Additional to the 75mil sockets you can also use the attachment E39-F9 In that case the fixing with silicon is
not necessary.
The advantage: the fiber is fixed permanently and can be changed easily if required.
There are different possibilities to position a fiber above the LED which has to be tested.
1.Mounting with a 75 mil socket:
The recommended method of mounting the fiber is using the supplied 1mm ID, with a 75 mil socket. Another advantage
of the socket is the internal indentation, which fixes the fiber effectively in position during the debugging.
After the debugging the fiber can be held in position using a small dot of silicon adhesive.
Figure 6: 75 mil Socket
Figure 8: Cutting tool for the fibers
Figure 7: Attachment E39-F9
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2. Interface and Power Wiring
2.1. Mounting a stand-alone unit for USB Interface
The Digital Colour Analyzer can be operated by RS 232 as well as by an USB Interface.
During RS 232 operating a voltage of 7-15V, 80mA has to be applied additionally.
RS 232 Connect:
Female 2, Pin 23 Rx 2 RS 232 Kabel: Pin 2 Tx 2 yellow mark
Pin 24 Tx 2 Pin 3 Rx 2
Pin 25,26 GND Pin 5 GND
Female 2, Pin 23,24 Jumper (if using several boards the jumper has to be set only at the last board)
Supply Voltage:
Setting Jumper
Female 2, Pin 1,2 U In 7-15V
Pin 5,6 GND
BR1 Pin 2+3 Jumper
RS 232 cable can be ordered from GPS.
Figure 9: Physical Layout
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2. Interface and Power Wiring
2.2. Mounting a stand-alone unit for RS 232 Interface
The Digital Colour Analyzer can be operated by RS 232 as well as by an USB Interface.
During USB operating the power supply for the board takes place through the USB Interface.
USB Connect: USB Cable:
Connector BU2,Pin 29 +5V USB Female: Pin1 (yellow mark) USB Connector: Pin 1 +5V
Pin 30 —Pin2 — —-
Pin 31 Data- Pin3 Data- Pin 2 Data -
Pin 32 Data+ Pin4 Data+ Pin 3 Data +
Pin 33 GND Pin5 GND Pin 4 GND
Pin 34 —Pin6 — —-
BR1 Pin 1+2 Jumper
USB cable can be ordered from GPS.
Figure 9: Physical Layout
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USB Connect:
Pin-strip Pin 29,30 +5V USB Cable: Pin 1+5V yellow mark
Pin 31 Data- Pin 2Data -
Pin 32 Data+ Pin 3Data +
Pin 33,34 GND Pin 4GND
Bridge Pin 1+2 Jumper for USB operating
Current receiving is 80 mA for each device. With USB you can support up to 5 devices (max. 400 mA)
Data-bus: Board 1 up to N-1: Pin 19 Rx4 Board N: Pin 24 Tx2
Pin 20 Tx4 Pin 23 Rx2
Pin 6 GND Pin 5 GND
Pin 4 5V Pin 3 5V
Pin 19, 20 Jumper
Figure 10a: Connection Dia-
2.2. Mounting interconnected units for USB
If the power input is 80 mA per board
up to 5 boards can be operated through
the USB Interface.
(Complete supply voltage about 400mA).
In this case the LED Colour Analyzer can
be tested 25 LEDs.
See the physical layout below:
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2.4. Mounting interconnected units for RS 232
The Digital Colour Analyzer can be connected
to 99 boards so that 495 LEDs can be tested.
See the physical layout below:
RS 232 Connect:
Female2, Pin 23 Rx 2 RS 232 Cable: Pin 2 Tx 2 yellow mark
Pin 24 Tx 2 Pin 3 Rx 2
Pin 25,26 GND Pin 5 GND
Data Bus:
Female2, Pin 19 Rx 4 Pin 21,22GND
Pin 20 Tx 4
Pin 23 Rx 2 Pin 25,26GND
Pin 24 Tx 2
Last board setting Jumper
Female 2, Pin 19,20 Jumper
Supply Voltage: Each board has an own power supply unit and can be operated + 7V to 15V (power input about 80mA).
Female 2, Pin 1,2 U In 7-15V
Pin 5,6 GND
BR1 Pin 2+3 Jumper USB and RS 232 cable can be ordered from GPS .
Figure 10b: Connecting Diagram
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3. Setting the Digital Colour Analyzer
After the software has been installed and the Digital Colour Analyzer has been attached the following settings have to be
respected.
Configuration:
Interface
The USB Port is configured as a virtual Com Port and will be designated a name such as Com5, Com6, etc.
The Baud Rate can be changed to any between 9600 and 115200 .
Set the serial port to Auto and the baud rate to 115200.
The Digital Colour Analyzer Test Program is a graphical tool that can be used to send commands and receive results
from the Analyzer.
One LED can be tested at a time. The results are stored in a data e.g. TestReport.txt.
This program allows to determine the correct setting for the LED which has to be tested.
For further details, please refer to chapter 3.3.3 .
Alternately, a customised program may be generated that sends commands and receives data through the virtual
USB Com Port or RS 232 interface.
Figure 11: Settings
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