Digital Volt/Ohm Meter (DVOM)

Digital Volt-Ohmmeter:

PURPOSE
Like Analog meters, Digital Volt/Ohm Meters (DVOM's), can be used to measure and compare actual values with expected circuit values.

ADVANTAGES OF DIGITAL METERS OVER ANALOG METERS
Digital Volt/Ohm Meters (DVOM's) have a numerical readout, which is more precise than the needle reading on an analog meter.

Digital Volt/Ohm Meters (DVOM's) have a higher internal impedance (10 Meg ohms typical), which prevents loading or damaging digital (computer related), circuits.

VOLTMETER CONNECTION:
When measuring voltage always connect the voltmeter in parallel to the circuit or component.

CAUTION: Connecting a voltmeter in series with a circuit may damage the meter and/or circuit.

OHM METER CONNECTION:
Before attempting to measure the resistance of a circuit or component, always disconnect any voltage sources from the circuit or component.
Connect the ohmmeter across--in parallel with--the resistance to be measured.

CAUTION: Connecting an ohmmeter to a circuit while voltage is present may damage the meter and/or the circuit.

AMMETER CONNECTION:
Connect the ammeter in series with the circuit.

CAUTION: Make sure polarity is correct prior to energizing circuit.