METER [Large Demonstration]

$ 17.50 – $ 286.00 excl. GST

Housed in an ABS plastic case 300 x 150 x 300 mm.
Moving coil has accuracy of +/-2.5%.
Basic sensitivity is 5mA and 100mV at full scale deflection.
Can be used as an AC or DC ammeter or voltmeter.
Interchangeable dials with their own series resistors, shunts or rectifiers can be purchased to convert it to a number of ranges.
Movement can be centre zeroed when used as a galvanometer.
Supplied with the following dials:
2.5 – 0 – 2.5mA, •• 0 – 1A/DC.
0 – 15-volts / DC, •• 0 – 100mV / DC.
0 – 10A / DC, •• 0 – 5-volts / DC.

Description

Clear

SKU: METER-LARGE-DEMONSTRATION Categories: Measuring Devices, Meters, Physics

Description
Additional information

METER [Large Demonstration]

(Wikipedia excerpt: ..."...Meter {M] ....The D'Arsonval galvano-{M] is a moving coil am-{M] . It uses magnetic deflection, where current passing through a coil placed in the magnetic field of a permanent magnet causes the coil to move. The modern form of this instrument was developed by Edward Weston, and uses two spiral springs to provide the restoring force. The uniform air gap between the iron core and the permanent magnet poles make the deflection of the meter linearly proportional to current. These {M] have linear scales. Basic {M] movements can have full-scale deflection for currents from about 25 microamperes to 10 milliamperes.[4]

Because the magnetic field is polarised, the {M] needle acts in opposite directions for each direction of current. A DC am-{M] is thus sensitive to which polarity it is connected in; most are marked with a positive terminal, but some have centre-zero mechanisms[a] and can display currents in either direction. A moving coil {M] indicates the average (mean) of a varying current through it,[b] which is zero for AC. For this reason, moving-coil {M] are only usable directly for DC, not AC. This type of {M] movement is extremely common for both ammeters and other (M) derived from them, such as volt-{M] and ohm-{M] ....").

[Got more questions? Email us your query.] | [Home Page]