Tracker-2800-2800S.pdf - 第36页
36 SECTION 3 TESTING P A SSIVE COMPONENTS 3-1. RESISTORS Exploring how the Tracker 2800 ranges intera ct with different resistance v alues is a good introductio n on how basic ASA troubleshooting is applied. Thi s sectio…
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CONTROL – 2000 Mode
The Tracker 2800/2800S can be set to display three of the ranges used with the popular Tracker 2000.
To enable 2000 mode, press the 2000 button in the Control menu. The display will change to the
Tracker 2000 ranges as shown in figure 2-32.
Figure 2-32 Tracker 2000 mode
LOW range: 10V at 54
MED1 range: 15V at 1.2K
MED2 range: 20V at 26.7K
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SECTION 3 TESTING PASSIVE COMPONENTS
3-1. RESISTORS
Exploring how the Tracker 2800 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
2800 basic operation and teach you how resistor signatures relate to both test range and the resistance
of the circuit under test. After completing this section, you will know how to:
Apply test probes across a resistor
Identify a pure resistive signature
Analyze and predict resistive signatures
As you go through the following section, make a mental note on the relationship between the Tracker
2800's test range parameters: voltage, resistance and frequency.
Put the red test lead in the Channel A jack, and the black test lead in the Common jack.
Micro Probe Adjustment (Do not over-tighten the tip in step 3):
Figure 3-1. Huntron MicroProbe Adjustment.
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To display the analog signature of a resistor:
1. Select the Tracker tab of the Signature pane of the Huntron Workstation Software.
2. Select the 50 ohm range by clicking the Resistance dropdown button and selecting 50.
3. Place or clip a test lead on the opposite ends of a resistor and observe the signature.
Below are four analog signatures of different resistors, 150, 1.5 k, 15 k and 150 k ohms in each of the
four Ranges. Note how the slope or angle of each analog signature changes with each resistor's value.
100 1 k 10 k 100 k
Vs=20V, Rs=100kFs=200Hz
100 1 k 10 k 100 k
Vs=20V, Rs=10k Fs=200Hz
100 1 k 10 k 100 k
Vs=15V, Rs=1k Fs=200Hz
100 1 k 10 k 100 k
Vs=10V, Rs=10 Fs=200Hz
Figure 3-2. Signatures of Different Resistors in 4 Ranges.