Specifications

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The 2125A's measurement capabilities are:
Quantity Useful measurement range
If outside range,
looks like
Resistance 10 Ω to about 10 kΩ
< 10 Ω→ short
> 10 kΩ → open
Capacitance 0.33 µF to 330 µF
< 0.33 µF → open
> 330 µF → short
Inductance 50 mH to 5 H
< 50 mH → short
> 5 H → open
As an example, a 1 H inductor might look like the ellipse in Figure 14 and a 10 H inductor would look
like an open circuit.
The component tester limits the current through the device. The short circuit current will be on the order
of 10 mA, so it will be difficult to damage a component. However, since the peak-to-peak voltage is
around 18 volts, you may not want to use the component tester on sensitive low voltage
semiconductors.
The component tester can test combinations of components too. This is valuable when troubleshooting,
especially if you have a known-good circuit to compare the behavior to. If the suspect circuit matches
the signature of the known-good circuit, the tested subcircuit of the suspect circuit is probably good.
Conversely, if they don't match, that section of the circuit may deserve more in-depth troubleshooting
examination.
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