Velleman DCA55 User Manual

Peak Atlas DCA Semiconductor Component Analyser Model DCA55 User Guide © Peak Electronic Design Limited 2000/2007 In the interests of devel

Atlas DCA User Guide October 2007 – Rev 7 Page 10 Bicolour LEDs Bicolour LEDs are automatically identified. If your LED has 3 leads then ensure th

Atlas DCA User Guide October 2007 – Rev 7 Page 11 Bipolar Junction Transistors (BJTs) Bipolar Junction Transistors are simply “conventional”

Atlas DCA User Guide October 2007 – Rev 7 Page 12 Pressing the scroll-off button will result in the transistor’s pinout being displayed.

Atlas DCA User Guide October 2007 – Rev 7 Page 13 Additionally, many Darlingtons and a few non-Darlington transistors also have a resistor shunt ne

Atlas DCA User Guide October 2007 – Rev 7 Page 14 Faulty or Very Low Gain Transistors Faulty transistors that exhibit very low gain may caus

Atlas DCA User Guide October 2007 – Rev 7 Page 15 Current Gain (HFE) The DC current gain (HFE) is displayed after any special transistor featu

Atlas DCA User Guide October 2007 – Rev 7 Page 16 Base-Emitter Voltage Drop The DC characteristics of the base-emitter junction are displayed

Atlas DCA User Guide October 2007 – Rev 7 Page 17 Collector Leakage Current The collector current that takes place when no base current i

Atlas DCA User Guide October 2007 – Rev 7 Page 18 Enhancement Mode MOSFETs MOSFET stands for Metal Oxide Semiconductor Field Effect Transistor.

Atlas DCA User Guide October 2007 – Rev 7 Page 19 Depletion Mode MOSFETs The fairly rare Depletion Mode MOSFET is very similar to the conventional

Atlas DCA User Guide October 2007 – Rev 7 Page 2 Want to use it now? We understand that you want to use your Atlas DCA right now. The unit is read

Atlas DCA User Guide October 2007 – Rev 7 Page 20 Junction FETs (JFETs) Junction FETs are conventional Field Effect Transistors. The voltage ap

Atlas DCA User Guide October 2007 – Rev 7 Page 21 Thyristors (SCRs) and Triacs Sensitive low power thyristors (Silicon Controlled Rectifiers - S

Atlas DCA User Guide October 2007 – Rev 7 Page 22 Care of your Atlas DCA The Peak Atlas DCA should provide many years of service if used

Atlas DCA User Guide October 2007 – Rev 7 Page 23 Self Test Procedure Each time the Atlas DCA is powered up, a self test procedure is performed. I

Atlas DCA User Guide October 2007 – Rev 7 Page 24 Appendix A - Technical Specifications All values are at 25°C unless otherwise specified. Paramet

Atlas DCA User Guide October 2007 – Rev 7 Page 25 Appendix B – Warranty Information Peak Satisfaction Guarantee If for any reason you are no

Atlas DCA User Guide October 2007 – Rev 7 Page 26 Appendix C – Disposal Information WEEE (Waste of Electrical and Electronic Equipment), Recy

Atlas DCA User Guide October 2007 – Rev 7 Page 3 Introduction The Peak Atlas DCA is an intelligent semiconductor analyser that offers great featur

Atlas DCA User Guide October 2007 – Rev 7 Page 4 Important Considerations Please observe the following guidelines: • This instrument must NEV

Atlas DCA User Guide October 2007 – Rev 7 Page 5 Analysing Components The Atlas DCA is designed to analyse discrete, unconnected, unpowered comp

Atlas DCA User Guide October 2007 – Rev 7 Page 6 If the Atlas DCA cannot detect any component between any of the test probes, the follo

Atlas DCA User Guide October 2007 – Rev 7 Page 7 Diodes The Atlas DCA will analyse almost any type of diode. Any pair of the three test clips ca

Atlas DCA User Guide October 2007 – Rev 7 Page 8 Diode Networks The Atlas DCA will intelligently identify popular types of three terminal

Atlas DCA User Guide October 2007 – Rev 7 Page 9 LEDs An LED is really just a another type of diode, however, the Atlas DCA will det