Abs 45-65hz Ac Volt Meter High Precision 5A 99T Three Phase
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MC 612 multi-function digital display ammeter pointer single-phase ac 4216 digital high precision measurement of 99 t Introduction Ammeter refers to a meter used to measure current in AC and DC
circuits. In the circuit diagram, the symbol of the ammeter is
"circle A". The current value takes "A" or "A" as the standard
unit.
Specification
The principle The ammeter is made according to the force of the magnetic field on
the energized conductor in the magnetic field. There is a permanent
magnet inside the ammeter, which generates a magnetic field between
the poles. There is a coil in the magnetic field. There is a
hairspring spring at each end of the coil. The springs are
connected to a terminal of the ammeter. The spring and the coil are
connected by a shaft, and the shaft is opposite. At the front end
of the ammeter, there is a pointer. The pointer is deflected. Since
the magnitude of the magnetic field force increases with the
increase of the current, the magnitude of the current can be
observed by the degree of deflection of the pointer. This is called
a magnetoelectric ammeter, which is what we usually use in the
laboratory.
Precautions When measuring current, the ammeter should be connected in series
with the circuit under test; when measuring voltage, the voltmeter
should be connected in parallel with the circuit under test. When
measuring DC current and voltage, you must pay attention to the
polarity of the meter, and make the polarity of the meter
consistent with the polarity being measured. When measuring high voltage or large current, a voltage transformer
or current transformer must be used. The range of the voltmeter and
ammeter should be consistent with the secondary rated value of the
transformer. Generally, the voltage is 100V and the current is 5A. When the measurement in the circuit exceeds the range of the meter,
an external shunt or voltage divider can be used, but it should be
noted that its accuracy level should be consistent with the
accuracy level of the meter.
Digital display ammeter Rules of Use ① The ammeter should be connected in series with the electrical
appliance in the circuit (cannot be connected to the two ends of
the battery, otherwise the ammeter will be burnt out.); |
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Product Tags: 65hz Ac Volt Meter Ac Volt Meter High Precision 5A analog panel voltmeter 5A 99T |
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