Vantaġġi u żvantaġġi ta ' konvenzjonali u diġitali multimetri
A pointer multimeter is an medja strument. It has an intuwittiv. Visual indication of the reading.
(Ġenerali qari huma mill-qrib relatati ma ' l- angolu swing ta' il pointer, so it huwa ħafna intuwittiv).
Diġitali multimeter is an instantaneous style instrument. It uses 0.3 seconds to take a sample to display the measurement results. Sometimes the results of sample are only very similar. Not exactly the same. This is not convenient for reading results as pointer type.
Pointer multimeters generally do not have an internal amplifikatur. So the internal resistance is small. The MF-10}, for example, has a DC voltage sensitivity of 100 kOhm/volt. The MF-500 has a DC voltage sensitivity of 20 kOhm/volt.
Diġitali multimetri have an internal op amp circuit. Internal resistance can be made very large. Often 1M ohms or greater. (i.e., can get a higher sensitivity). This makes the impact on the measured circuit can be smaller. Higher measurement accuracy.
Pointer multimeter due to the small internal resistance, and more discrete components to form a shunt voltage circuit. So the frequency characteristics are not uniform (relative to digital). And the frequency characteristics of the pointer multimeter is relatively good.
Pointer multimeter intern struttura huwa sempliċi hekk il spiża huwa baxx. Dewer funzjonijiet. Sempliċi manutenzjoni. Aktar b'saħħtu kurrent żejjed u vultaġġ żejjed kapaċità.
Diġitali multimeter adopts ħafna kinds of oxxillation, amplification. Frequency division. Protection circuitry so more functions, such as temperature measurement. Frequency (in a lower range). Capacitance, inductance. Or as a signal generator and so on.
Due to the internal structure of many integrated circuits, so the overload capacity is poor. (But now some been been able to automatically shift gears. Automatic protection. But the use of more complex). Damage is generally not easy to repair.
Diġitali multimeter output vultaġġ is low (normalment no aktar than 1 volt). For some special voltage characteristics of the components of the test inconvenience (bħal, controlled, light-emitting diodes, etc.).
Pointer multimeter output voltage is higher, (10.5 volts, 12 volts, etc.).
Kurrenti huwa wkoll kbir (bħal MF-500 * 1 ohm gear massimu of 100 mA or so) can be konvenjenti to test the SCR, light-emitting diodes and so on.
