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Ammeter

Authors: Ms. Giselle dos Santos Castro - Federal University of Ceara - UFC
Dr. Nildo Loiola Dias - Federal University of Ceara - UFC

CONTROLS:

- Choose one of 4 possible resistance values.
- The black probe is fixed to the multimeter, but the other end can be dragged to a point on the circuit marked with a letter (from A to F) or to one of the voltage source outputs.
- Connect the red probe by dragging the circular end to the desired multimeter port and drag the other end to a point on the circuit marked with a letter (from A to F) or to one of the voltage source outputs.
- Press the yellow dot on the edge of the multimeter selection knob and move to the appropriate ammeter scale.
- Adjust the voltage source output potential difference at the cursor.
- Press the REPLACE MULTIMETER button if the multimeter image is blurred (indicating that it has been damaged by improper use).

DESCRIPTION OF THE SIMULATION:

This simulation allows studying the operation of the ammeter function of a digital multimeter. In the simulation only the ammeter function is active. An open circuit, with 5 resistors in series, with nominally equal resistance values (but different due to tolerance) is connected to a DC voltage source that can be regulated from 0 to 50 V. There are 4 options for the nominal values of the resistors. The black and red probes can be connected to the circuit in order to close the circuit by inserting the ammeter in series. The circuit can be formed with one, two, three, four or five resistors in series depending on how the probes are connected. The red probe must be connected to the appropriate port on the ammeter according to the desired scale. If you try to measure an electrical current greater than the chosen scale allows, the ammeter may burn out (this will be indicated by a blurry image of the multimeter). In this case press REPLACE MULTIMETER button to get a new multimeter.

For an analysis of the data, consult one of the proposed ACTIVITY GUIDE.

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