Ultra low-voltage and fast continuity tester. Digital multimeters are very good at precise measurements, but usually not so good at continuity testing. This little tester solves the problem.
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Open terminals voltage is 100 mV, short terminals current is 100 μA. Suitable for in-circuit measurement (keep p-n juntions closed) without the risk of damaging sensitive components.
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Resistance-dependent beeper tones with chromatic steps. Audible feedback avoid moving your viewpoint. Discrete chromatic steps make it easier to determine resistance by ear. The range is 0–10 Ω with 1 Ω steps.
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Detects shorts of 1 ms with ensured minimal beep duration of 100 ms. Suitable for finding connections by sweeping and brushing without the risk of missing a beep. Gold-plated probes are recommended.
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Auto hold the minimal resistance. Helps against unstable contacts, e.g. on dirty, oxidized, or lacquered boards. The hold resets when resistance became more than 10 Ω.
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200 working hours on a single CR2032 cell. Consumes 0.7 mA when on (+0.3 mA when beeping), 0.1 μA when off. After 3 minites of inactivity, the tester switched off automatically.
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Test points for measuring the amplifed resistance signal. In case you want more precise measurements, connect a voltmeter to the dedicated test points. This tester isn't a calibrated ohmmeter, so this should be used only for relative measurements. Voltage scale on the test points is approx. 100 mV/Ω. An analog voltmeter is recommended here.
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±30 V input protection. The tester should not be used on a powered circuit, but just in case. Also saves against charged capacitors. The input impedance of the tester is 1 kΩ, so the risk of damaging an accidentally powered circuit under test is also low.
