Basic functions of professional digital multimeter
The measurement of current, voltage and resistance is generally regarded as the basic function of a multimeter. The brand of the early multimeter manufacturer AVΩ is the abbreviation of the names of the three units of measurement that the device can measure: A Ampere, V Volt, Ω Ohm, so early electricians generally still The multimeter is called a three-meter.
New devices have been developed that can measure many more metrics; some common additional features, and the units of measure they measure, include:
H Inductance (Henry)
F capacitor (farads)
Conductance (Siemen) ---- Rarely used
°C/°F Temperature (Celsius or Fahrenheit)
Hz frequency (Hertz)
% duty cycle (percentage)
DWELL closed angle (car digital multimeter)
TACH Tach (RPM, Automotive DMM)
hFE (transistor magnification)
Functional Auxiliary Symbols or Logos:
AC or ~ , AC
DC or = , DC
Commonly used forms such as: DCV (direct current voltage), A~ (alternating current)
