Digital multimeters are commonly used to test low-resistance or voltage during industrial troubleshooting work. The VOM X1 resistance scale, or the digital multimeter 200-ohm scale, is used to determine if a circuit is open or has continuity. The reading will be either infinity for open, or very few ohms for a completed circuit.

Internal Digital Multimeter

Ammeter milliamp ranges are used in electronics rather than electrical work. Ammeter ranges in the hundreds and tens of amps are usually required in industrial electrical test.

Example: A 10-hp 3-phase motor running at full load on 240 volts would draw 18 amps. The starting current would be six times the full load current (108 amps), but internal ampere ranges of multimeters cannot be used on these high values. Ranges of 0.2 to one amp are used for measuring coil current in industrial settings, Clamp on style ammeters would service the function more readily and is safer than placing a digital multimeter in series with the coil by disconnecting the leads.

Digital multimeters perform the same test as voltmeters with a lower percentage of internal error and better precisian, because they will display the numbers in tenths and hundreds. The eye has a difficult time distinguishing the small internal variations of a needle on the scale of a voltmeter.
Never assume that any digital multimeter will perform resistance or continuity measurements on a live circuit safely unless specifically stated.
 
Electrical troubleshooting test in which a digital multimeter would be used are as follows:
-Voltage value test
-Voltage status test
-Live circuit continuity test using voltage
-Dead circuit resistance test
Fluke produces several inexpensive meters that displays resistance or voltage values without changing functions.