Modern Digital Multimeter Features
Integral circuits provide current digital instruments extra capability by enabling everything from control circuits to tiny embedded computers.
These are typical augmentation measurements:
measuring the current-limited semiconductor junction voltage drop to identify the type of transistor;
graphic representation of measurable values, like histograms;
can simplify go/no-go measurements;
measurement that is ongoing and an alert that sounds when a circuit occurs;
oscilloscope for low frequency;
phone test equipment;
Automatic circuit testing, such as timing and delay signal generation automatically;
Simple data probing operations, such as keeping track of the highest and lowest values for a predetermined amount of time or capturing a given number of sample readings on a regular basis
when a device is removed from a test circuit, sample and hold locks the most recent reading for reading;
Automatic test range switching, automatic measurement range selection during measurement, and instrument protection are all features that the device has.
The circuitry or software in most digital multimeters ensures precise measurement of AC voltage at any frequency. This kind of multimeter combines the input signal using the root mean square approach so that the true voltage value can be read accurately even if the input signal is not an ideal sine wave.
Infrared, RS-232, the IEEE-488 device bus, and other methods can be used to link some contemporary multimeters to a personal computer. These methods allow the computer to capture readings as they are made or allow the device to upload a set of data to the computer.
Multimeters are disappearing from the technician's toolkit as current systems and gadgets grow more intricate; in their place, more sophisticated and specialized equipment. For instance, when evaluating an antenna in the past, a worker would have used an ohmmeter to gauge its resistance; a modern specialist might have tested a number of factors using a handheld analyzer to ascertain the integrity of the antenna cable.
