There have been several posts on using a VOM, so here is my stab at it.
To measure amps, you want 0 resistance in the meter so it does not effect the reading. The holes that are marked amps and common provide this.
To measure voltage, you want infinite resistance in the meter so it does not effect the reading. The holes marked volts/resistance and common provide this.
To measure resistance, the meter provides a voltage and looks at the current required to determine resistance. The holes marked volts/resistance and common provide this.
You will usually not damage a meter if measuring current with the probes in the voltage holes, but can if measuring voltage with the probes in the current holes.
You should never have voltage on a circuit when measuring resistance.
The meter must be selected to the correct position that matches the holes or it will not work correctly.
The meter usually has in internal fuse that protects it.
To measure amps, you want 0 resistance in the meter so it does not effect the reading. The holes that are marked amps and common provide this.
To measure voltage, you want infinite resistance in the meter so it does not effect the reading. The holes marked volts/resistance and common provide this.
To measure resistance, the meter provides a voltage and looks at the current required to determine resistance. The holes marked volts/resistance and common provide this.
You will usually not damage a meter if measuring current with the probes in the voltage holes, but can if measuring voltage with the probes in the current holes.
You should never have voltage on a circuit when measuring resistance.
The meter must be selected to the correct position that matches the holes or it will not work correctly.
The meter usually has in internal fuse that protects it.