Page 2
Huntron Tracker 3200S instrument. Huntron warrants that the Huntron Tracker 3200S hardware shall be free from defects in material and workmanship for one (1) year from the date of purchase.
UALITY 1-5 W ........................11 ORKSTATIONS OFTWARE ....................11 UNTRON ORKSTATION SOFTWARE FEATURES SECTION 2 USING THE TRACKER 3200S ....................12 2-1 U ......................12 NPACKING AND WHAT IS INCLUDED 2-2 G 3200S ..................13 ETTING STARTED WITH THE RACKER .............................
ASA is simply a matter of finding the defective component by analyzing its signature. The Tracker 3200S implements the ASA technique of troubleshooting. The built-in current limited stimulus sine-wave of the Tracker 3200S ensures non-destructive testing and does not damage any components. ASA has many advantages as a proven, fast, and effective troubleshooting technique: •...
You can manually connect the Tracker 3200S front panel test terminals directly to the circuit card or component that you are testing. You can automate the test process by connecting to boards under test via custom cabling or IC clip and cables.
Page 7
Level: 0 to +/- 10V DC or Square wave; Pulse mode width: 2% to 50% duty cycle; Source Resistance: 100Ω; Maximum current: Pulse Generator 100mA per channel PC Interface USB 2.0 GENERAL Power Requirements 100/115V~ 0.2A 50/60Hz, 230V~ 0.1A 50Hz Fuse T400mA 5x20mm 250V 59 degrees F to 86 degrees F...
ATTENTION Ce symbole est utilisé dans le manuel de l'utilisateur comme un avertissement que l'usage abusif peut entraîner des dysfonctionnements unité. Pour votre sécurité toujours suivre les instructions à côté du symbole de l'unité et dans le manuel. The Huntron Tracker 3200S conforms to the following Standards: EN/IEC 55011 EN 61000-3-2...
Do Not Operate in Wet/Damp Conditions. Ne pas opérer dans les conditions humides ou humides. Do Not Operate in an Explosive Atmosphere. Ne pas opérer dans une atmosphère explosive. Environment Conformity Quality For more information see our website www.huntron.com/corporate/environment.htm...
Huntron wants to make sure that old Huntron products are responsibly recycled. As part of that goal, Huntron offers a trade-in for any one used Tracker or Prober when a new Tracker or Prober is purchased. All trade-in products are responsibly recycled. More information on Trade-in program go to www.huntron.com/sales-support/repairpolicy.htm.
Workstations Software The Tracker 3200S can be used with Huntron Workstation Software. For instructions on installing the software, see the Getting Started document that comes with the Tracker 3200S. Huntron Workstation software features • Create custom test routines for low volume manufacturing, repair and rework applications •...
Section 2 Using the Tracker 3200S Unpacking and what is included To set up and use your Tracker 3200S, you will need the following: • One set of Microprobes (Huntron MP20). • This manual (Tracker 3200S User’s manual) • Cables to connect to a PCB connector or DIP clip cables and clips (These are not included) •...
Getting started with the Tracker 3200S Front Panel Overview Figure 2-2 Tracker 3200S Front panel Overview Front Panel Breakout Note: Many of the front panel buttons have two states, solid LED and flashing LED. In most cases press once for sold LED and twice for flashing LED.
Probing with Microprobes • Connect the Tracker 3200S to power. • Turn the Tracker 3200S ON using the front panel power switch. The “Power-up” menu will be displayed on the LCD touch screen. • Insert your Huntron Microprobes into the shrouded banana jacks marked Channel A (or...
Page 15
used in the Channel A (or B) connection and the black Microprobe used in the Common connection. • Proceed to test components on a powered off circuit board by holding the tips of the test probes to the component pins. •...
2-3. Channel Selection There are two channels on the Tracker 3200S (channel A and channel B) which are selected by pressing the appropriate front panel button. When using a single channel, the red probe should be plugged into the corresponding channel test terminal and the black probe or common test lead should be plugged into the common test terminal.
Analog Signature Analysis (ASA) Basics Here's how ASA and power-off testing works: The Tracker 3200S outputs a precision current-limited AC sine wave signal to a component and displays the resulting current flow, voltage drop and any phase shift on the LCD display. The current flow causes a vertical trace deflection on the display, while the voltage across the component causes a horizontal trace deflection.
Page 19
. When using ASA for troubleshooting, the objective is to select the range that will display the most descriptive Tracker signature information. The Tracker 3200S user can readily accomplish this by changing the proper range parameter. The source voltage V of the test signal can be used to enhance or disregard semiconductor switching and avalanche characteristics.
Page 20
LCD display. When the test signal is negative, the voltage and current are negative so the trace is in the left hand side of the display. Turn on the Tracker 3200S and observe the LCD display. With nothing connected to its test terminals, ...
Page 21
LCD display. Connect the red microprobe to the output channel A jack on the Tracker 3200S and the black microprobe to the Common jack. Touch and hold the probes together and observe the Tracker signature on the LCD display.
Refer to Fig 2-11. Each one of these basic components responds differently to the Tracker 3200S test signal. Recognizing these four basic unique signatures on the LCD display is one of the keys to successful ASA troubleshooting. When components are connected together to form a circuit, the signature at each circuit node is a composite of the basic component signatures in that circuit.
2-10 Smart Tracker Active Range (STAR) feature The Tracker 3200S has a built-in operating feature called STAR (Smart Tracker Active Range). This important feature protects sensitive components from possible exposure to excessive power (for example, 15V and 10). Valid Tracker 3200S Ranges...
2-11 Pulse Generator The built-in Pulse Generator of the Tracker 3200S allows in-circuit testing of certain devices in their active mode. In addition to using the red and black probes, the output of the Pulse Generator is connected to the control input of the device to be tested with the blue clip lead provided. The Pulse Generator has two outputs enabling you to test two devices at the same time (comparison testing) or double the output current level by connecting` both outputs to one device.
Figure 2-13. Typical 3200S setup with DIP clips Using the scanning capabilities of the Tracker 3200S is very easy. It is possible to scan using one channel or both and also make signature comparisons between channel A and channel B.
Page 26
Press the Menu front panel button to display the Main menu. Select PKG from the touch screen Main menu to display the PKG menu. Select PKG (the text above the button will turn red) and use the and front panel buttons to step up or down through the package choices of DIP, SIP, BOTH or FRONT.
Page 27
(flashing LED) buttons on the front panel. If A+B or _ _ALT are used, a green check mark or red X will be displayed at the bottom left of the LCD indicating pass or fail. Tracker 3200S Scan modes: SCAN button (solid LED) – Scan through the 4 Default Ranges only _ _PIN button –...
2-14 Using the Footswitch with the Tracker 3200S A footswitch (Huntron part number 98-0314) is included for controlling certain functions of the Tracker 3200S. It connects to the auxiliary port located on the Tracker back panel. Figure 2-19 Footswitch accessory for...
• RANGE: Pressing the footswitch will step through the four Default ranges. 2-15 Tracker 3200S Touch Screen Menus The Tracker 3200S utilizes a color LCD touch screen menu system for configuring operation of the Tracker 3200S. Many of the LCD menus will two button labelled DFLTS and UNDO. The DFLTS button set the current to the original factory default settings.
Figure 2-22 Setting the RATE value SigAssist Control SigAssist is a feature that displays values such as capacitance value, resistance value, forward breakdown voltage and reverse breakdown voltage on the LCD screen. You can turn the SigAssist feature on or off using the LCD menus. Press the front panel MENU button to display the Main menu.
Volume Control When using the front buttons or using some of the Scan functions, you will hear an audible tone. You can control the volume of the tone using the LCD menus. Press the front panel MENU button to display the Main menu. Press the VIEW button on the touch screen to display the VIEW menu.
COMP – TOL (Tolerance) Controls Tracker 3200S users can a set tolerance value that allows for slight variation when the signature on channel A is compared against the signature on channel B. The tolerance is adjustable from 0 to 99 where 0 is no variation and 99 is maximum variation.
COMP – MAX V Controls The Tracker 3200S can be set to not exceed a specific voltage if desired using the MAX V control. To adjust the MAX V setting press the MENU button then the COMP button on the LCD. Select the MAX V button and use the ...
Figure 2-31 SETUP – DIAGS menu Defaults To set the Tracker 3200S to the original Factory defaults settings, press the front panel MENU button. Select the SETUP button and then the DFLTS button on the LCD. The Tracker will indicate that the...
Figure 2-32 Setting Tracker to Factory Defaults RTEST To run the Tracker 3200S range resistors test, press the front panel MENU button. Select the SETUP button and then the RTEST button on the LCD. The test will be run and the status indicated. Contact Huntron Technical Support if you see failures.
WAVE Mode The Tracker 3200S can be set to show the horizontal (voltage) and vertical (current) waveforms on the LCD in addition to the analog signatures. Press the front panel and then select CTRL on the LCD. Select the WAVE button on the LCD and use the and buttons to toggle the setting to YES or NO.
Exploring how the Tracker 3200S ranges interact with different resistance values is a good introduction on how basic ASA troubleshooting is applied. This section will briefly familiarize you with Tracker 3200S basic operation and teach you how resistor signatures relate to both test range and the resistance of the circuit under test.
Page 38
Now that you have an idea of what the signatures of different resistor values look like in different ranges, the next part will give you an idea of what happens when you vary R source resistance, V source voltage and F source frequency of the Tracker 3200S and how it affects the resistive analog signature.
Page 39
The Effect of R on Resistor Analog Signatures. Observe the signatures for a 100 ohm resistor in the figure below as R varies. Note how these resistor signatures respond to changing Tracker 3200S's internal resistance. = 50 = 100 = 1K...
Page 40
• As the range increases − the volts per division of the horizontal axis increases − the internal resistance increases − the signature becomes more vertical Troubleshooting Applications • The Tracker 3200S is a fast and efficient continuity tester, providing real time information.
Page 41
• The Tracker 3200S can be used to adjust a potentiometer in circuit to an approximate operational setting. This application requires a known good board. Adjust each potentiometer on the board under repair to match the settings on a known good operational board.
3-2. CAPACITORS With a capacitor connected to the Tracker 3200S, the test signal across it responds quite differently than a resistor. The typical analog signature of a capacitor is an elliptical or circular pattern due to the fact that relationship between the test signal's current and voltage are non linear. The current's waveform is 90 degrees out of phase with respect to the voltage.
Page 43
CAUTION The device to be tested must have all power turned off and have all high voltage capacitors discharged before connecting the Tracker 3200S to the device. The Signatures of Different Capacitors The figure below shows analog signatures for four different value capacitors, 1000 f, 100 f, 10 f and 1f using a 10V, 50...
Page 44
Effect of Changing Frequency on a 0.1F Capacitor Selected range 10V, 1K and 20Hx then changed to 60Hz, 500Hz and 2KHz. = 20 Hz = 60 Hz = 500 Hz = 2 kHz Figure 3-10. Signatures of a 0.1 F Capacitor at Different Frequencies. Note that as the test signal frequency increases, each signature changes from a horizontal elliptical pattern to a vertical elliptical pattern.
Page 45
Figure 3-13. Tracker 3200S Core Circuit Block Diagram with a Capacitor. The Huntron Workstation Software displays the Tracker 3200S signature as a response to its test signal, an analog signature that represents the relationship between voltage, current and resistance of a component.
Page 46
: As the frequency of the test signal increases, the capacitive reactance X will decrease and the amount of current in the circuit will increase. On the Tracker 3200S, the elliptical signature will become increasingly vertical that implies more current flow.
Page 47
• Capacitors with leakage flaws have their ellipses tilted diagonally due to an internal resistance in parallel with the capacitance. Applications • The Tracker 3200S can locate defective capacitors in or out of circuit. The ranges cover 100 pF to 15,000 F. • When analyzing a capacitor's signature, adjust the Tracker 3200S's R...
3-3. INDUCTORS Inductors, like capacitors, have elliptical analog signatures and respond to Tracker 3200S's test signal non-linearly. Also like capacitors, an inductor's reactance (resistance to an AC test signal) is dependent on the test signal's frequency. Because of the way they are constructed using wire with some amount of resistance in it, it is hard to find a pure inductance.
Page 49
Effect of Frequency Changes on Inductive Signatures Selected range 10V, 50, 60Hz then changed to 1KHz and 2KHz. = 60 Hz = 1KHz = 2KHz Figure 3-17 Effect of varied F on 12,000 µH Inductor Signatures. Note that the signature changes from a vertical position to a horizontal position as the frequency increases.
Page 50
Figure 3-19 Effect of Varying R on 12,000 µH Inductor Signatures. Note that the signature changes from a horizontal to a vertical position as the Tracker 3200S's internal resistance R increases. This means the inductor's resistance can be analyzed by matching it with the Tracker 3200S's test signal resistance.
Page 51
• Inductors display elliptical signatures similar to capacitors. Since the inductor also exhibits resistance, due to its construction, the ellipse may be distorted. • As the Tracker 3200S test signal’s frequency is increased, the ellipse signature becomes flatter. This response is opposite to that of a capacitor.
Page 52
With this technique, we have just verified the AC cord, the AC noise filter, the fuse, the power switch and the primary winding of the transformer, without removing the cover from the computer. • Another simple test for a speaker or microphone is to apply the Tracker 3200S signal in V = 10 V, = 50 , F...
A mechanical switch has two states: it is either open or closed. When open, no current can flow; when closed, it acts as a short and allows current to flow. The Tracker 3200S can test the switching function of mechanically activated switches easily. Unlike the DVM that samples and gives a continuity measurement, the Tracker 3200S displays real time activity so if a switch has noisy, resistive or intermittent operation, its analog signature on Tracker 3200S's display will reflect these conditions.
Page 54
Figure 3-23 Using the Tracker 3200S Pulse Generator for Relay Testing Review • The Tracker 3200S can test switches in real time. This makes an excellent test for microswitches, power switches, control switches, pressure and heat sensor switches. • As the mechanical switch closes, watch for erratic or discontinuous signature. Switch bounce will...
SECTION 4 TESTING DISCRETE SEMICONDUCTORS 4-1. DIODES The most basic type of solid state semiconductor component is the diode. Diodes are formed by creating a junction between p-type and n-type semiconductor material. The pn junction gives diodes and semiconductor components polarity characteristics that allow them to conduct current when an external voltage is applied.
Page 56
Figure 4-2. Tracker 3200S Core Circuit Block Diagram with a Diode. You can see this "knee" signature on some diodes in the next section. = 10 Volts = 3 Volts Figure 4-3. Signatures of a 1N914 type Silicon Diode at 50 and 60Hz.
Page 57
2KHz Figure 4-4. Signature of a 1N914 Diode at Different Frequencies at 3V and 50. Effects of Changing Resistance on Diode Signatures Changing Tracker 3200S's internal resistance R moves the vertical knee portion of the diode's analog signature. As R increases, the knee of the signature moves inward toward the origin.
Page 58
When multiple components are connected together, it's important to realize that the Tracker 3200S has the ability to selectively display the signature of a single component.
Page 59
Again, when multiple components are connected together, it's important to realize that the Tracker 3200S has the ability to selectively display the signature of a single component.
Page 60
The 50 range shows that there is a resistive component to the signature when the diode is conducting. This is the result of a defect in the diode's internal PN junction. The resistance is visible only in 50 range because the voltage drop across it is small. In the other two ranges, the resistance is masked due to the internal resistances being too large to show such a small voltage drop.
Page 61
In ASA terminology, this two knee signature is known as the classic "chair" pattern that is common in many solid state semiconductor components. Figure 4-14 Tracker 3200S Core Circuit Block Diagram with a Zener Diode. Figure 4-15 Single Zener Diode and two Zener Diodes in Series.
Page 62
• The Tracker 3200S can be used to identify an unknown zener diode. If the zener diode is damaged, locate a good one, possibly on another board or in the same circuit and use the Tracker 3200S to approximate the voltage.
4-2. TRANSISTORS A bipolar transistor is a three layer device. There are two basic types. A PNP transistor has a layer of n-type silicon material sandwiched between two layers of p-type material. An NPN transistor has a layer of p-type silicon material sandwiched between two layers of n-type material. Figure 4-17 shows circuit symbol for a PNP and an NPN transistor.
Page 64
Bipolar Transistor Signatures In order to better understand the signatures that transistors create on the Tracker 3200S, we can model these devices in terms of equivalent diode circuits. These are shown in figure 4-18. These figures show that the collector-based junction analog signature looks similar to a diode signature, and the emitter- base junction signature looks similar to a zener diode signature.
Page 65
Sometimes, we need to identify unknown transistors. We may need to replace one in a circuit for which we do not have a schematic. The Tracker 3200S makes this a relatively simple procedure because each type of junction has a characteristic signature. This makes it possible to identify each of...
Page 66
Figure 4-22 Signature of Pins 1 And 2 of an Unknown Transistor. • This looks like a collector-base signature. What you do not know yet, is which pin is the collector and which pin is the base? • Probe pin 3 with the red probe and pin 2 with the black probe. •...
Page 67
Figure 4-24 Signature of Pins 1 and 3 of an Unknown Transistor. Darlington Bipolar Transistor Signatures The Darlington transistor is basically two transistors paired together in a special configuration. The emitter of the first transistor is connected to the base of the second transistor. The collectors of both transistors are connected together.
Page 68
• The Tracker 3200S can be used to determine the type of transistor; bipolar, Darlington, FET, etc. • The Tracker 3200S can be used to identify the polarity of a transistor (PNP or NPN).
4-3. SOLID STATE SWITCHING COMPONENTS Optical Switches There are two types of optical switches: phototransistors and optocouplers. Phototransistors can be used in two modes depending on the application. It can be used as either a light activated transistor or as a light activated diode. In either mode, light is used to turn it on and allow current to flow. The optocoupler consists of a light emitting diode and a phototransistor in the same package.
Page 70
SCRs and TRIACs A SCR and TRIAC are semiconductor components that are used in switching applications. A SCR (silicon controlled rectifier) is used for DC switching circuits. A TRIAC is used for AC switching circuits. This section will demonstrate how to dynamically test these components. Silicon Controlled Rectifiers (SCR’s) The SCR is a switching semiconductor device that conducts positive current only.
Page 71
Figure 4-31 Testing a SCR using the Pulse Generator – Note the diode type signature Review Solid state photosensitive switch components are turned on by light. SCRs and TRIACs are solid state switches that are turned on by a control input pin called a gate. SCRs conduct current in one direction while TRIACs conduct current in both directions.
This can make troubleshooting easier by giving us an easy-to-find signature to use as a comparison. In this section, it is important to understand how the Tracker 3200S and ASA respond to these circuits. Integrated Circuit Failures A functioning IC may stop working for a number of reasons.
Page 73
Digital Integrated Circuits Before we examine the analog signatures of an IC, let's study the block diagram of a 74LS245 octal bi- directional bus buffer to introduce some basic concepts. This IC is a member of the low power Schottky transistor-transistor logic family (LSTTL). Examine the block diagram for this chip below. You will see that there are only four different kinds of circuits on this chip.
Page 74
Although the logic function is the same, there are differences in the circuitry of each logic family. These differences can be readily seen in their signatures using the Tracker 3200S. We will illustrate these concepts with the following example two hex inverters, a 7404 and a 74LS04 from different logic families.
Page 75
Pin 1 input Pin 2 output Pin 14 power 20V, 10K, 200Hz 20V, 10K, 200Hz 10V, 100 200Hz Figure 5-5. Signatures of a 74LS04 Hex Inverter. Note the differences between the two logic families. They have the same logic function but different construction, therefore different signatures.
Page 76
1. Select the 10K, 3V and 60 HZ range 2. Place or connect the black or blue ground clip lead from the Tracker 3200S's Common jack to both reference and suspect ICs or the board’s ground pin.
3. Place or clip the red test lead from the Tracker 3200S's Channel A test terminal to the reference or known good IC's pin. For this example, start with pin 1 of the known good IC. 4. Observe the signature. This is the signature of the pin of the known good component.
Page 78
Figure 5-9. Op Amp Symbol and Schematic Diagram of an Inverter Circuit. We will examine the signatures of this analog IC and present some troubleshooting concepts for this type of component. OP Amp Signatures Pin 2 –Input Pin 3 +Input Pin 6 Output Figure 5-10.
Page 79
The op amp has three main terminals; + input, - input and output. An alternative way to perform ASA on the op amp is to connect Tracker 3200S's Common terminal to the op amp's output while making a comparison with the red test probe to the “ + ” and then the “ - ” leg. This eliminates problems encountered when probing op-amps that are isolated from power and common.
• Integrated circuits are complex devices that are built using basic electronic components. • The IC signatures resemble zener diodes. • There are many causes for IC failures and the Tracker 3200S can display its "health" as resistive leakage, an open or a short.
Page 81
74LVQ245 is pin 10. 3. Use the red test lead from the Tracker 3200S's Channel A jack and probe each pin of the IC. For this example, pins 2 to 9 and 11 to 18 are all buffer circuits so they will have identical signatures.
Page 82
• The most common point for reference is ground, but V or another point might give a more informative signature. Applications Testing for faulty IC’s is one of the more common uses for the Tracker. A technician can compare IC’s in or out of circuit.
Need help?
Do you have a question about the Tracker 3200S and is the answer not in the manual?
Questions and answers