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Summary of Contents for Cairn OptoLed Lite
- Page 1 Specialists in Fluoresence Microscopy - DESIGN TO INTEGRATION OptoLed Lite Instruction Manual www.cairn-research.co.uk Free Phone: 08453301267 (UK only) Tel: +44 (0) 1795590140 Fax: +44 (0) 1795594510...
- Page 3 2. Our standard LED heads have built in protection to avoid damage, however if in any doubt then please check with Cairn as to the rated power of the supplied heads, and use accordingly.
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Page 5: Table Of Contents
Contents Introduction Installation Guide Technical Summary Specifications Appendix LED Head Connections Overload Protection Technical Support... -
Page 6: Introduction
Introduction The Cairn OptoLED Lite is capable of driving an LED over a wide range of currents. The standard operating current range, which is set either by a front panel control or by an external control voltage, is 0-2 amps (A). This current is... -
Page 7: Installation Guide
Installation Guide Depending on the required configuration the LED head may have been pre-installed in a microscope coupling (described in a separate manual), or it may be a discrete unit. Either way we would recommend connecting the LED to the controller box using the DIN plugs provided and pointing the LED (or output of coupling) at a piece of white paper (NEVER VIEW THE LEDS DIRECTLY). - Page 8 necessary information for how to do this is given in the Appendix. ‘POWER ON’ Indicator This indicator is illuminated when the power is turned on both at the main socket as well as the power on switch located on the rear panel. ‘INT/EXT’...
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Page 9: Technical Summary
LED light sources have developed at a very fast rate over recent years and Cairn have now developed their own range of LED light sources for microscopy / macroscopy. - Page 10 For more general illumination, LED arrays with many more devices are also available. The OptoLED Lite can drive any of these as long as their required voltage and current requirements are within the specifications given below.
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Page 11: Specifications
Specifications Mains input voltage 85-260V, 50-60Hz, CE compliant Maximum output 20V Maximum output current 5A Response time to change in external analogue input <10usec External analogue control voltage range 0 to+5V Digital inputs TTL level (0V or +5V nominal) Overload detection, parameters set by components in the LED heads cut-out duration during overload, 1 sec nominal, auto reset Page 6... -
Page 12: Appendix
Heads for the OptoLED Lite to not include a feedback photodiode so only the pins indicated in bold are used. The heads are interchangeable between the OptoLED and the OptoLED Lite, with the extra functionality only being active if the full OptoLED heads are used with a full OptoLED controller. -
Page 13: Overload Protection
Pin 8 Negative supply (-5V) for the photodiode amplifier. Note that the controller detects the presence of an LED head by the current drawn from here by the photodiode amplifier. Therefore if no amplifier is fitted, a 10Kohm resistor should be connected from here to ground (pin 3) in order to provide a dummy load. - Page 14 Calculated values and nearest preferred resistor values for higher powers are as follows: Power Calculated Preferred 199K 200K 100K 65.7K 32.3K 27.6K 14.4K 12.3K 10.1K 7.7K 6.1K 4.3K 3.2K 100W 1.04K These resistor values correspond to tenfold higher power levels in array mode, which is signalled as described in the LED head connections section of this Appendix.
- Page 15 a decay time constant of around 10-20msec or possibly a little longer, will probably be about as far as we can go. For setting a higher transient power overload level, another resistor Rp, in series with a capacitor C is connected in parallel with the resistance R calculated as above.
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Page 16: Technical Support
Technical Support e-mail : tech@cairn-research.co.uk Web : http://www.cairn-research..co.uk/ Address : Cairn Research Ltd Graveney Road Faversham Kent ME13 8UP Telephone : +44 (0) 1795 590 140 Fax : +44 (0) 1795 594 510 Page 11... - Page 17 Page 12...
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