mA
- noun
- Specialized
- The Level Plus LT420 is a loop-powered 4- to 20-mA level transmitter.
- 4- to 20 mA
- 20 mA
- mA output
Examples
-
Zero and span adjustments permit scaling the input to set the 4- to 20-mA output as desired.
Academic text (1994) -
The external channels support 4-20 mA probes, including pressure transducers and water quality probes.
Academic text (1997) -
The control loop output is 4 to 20 mA or 0 to 20 mA.
Academic text (1995) -
F equals MA, force equals mass times acceleration.
-
The sensor operates on 5 V DC with a maximum of 30 mA current.
Academic text (1998) -
The transmitter has been designed for 1/1000-in. resolution with standard 4 to 20 mA DC output.
Academic text (1994) -
The self-contained unit provides a reversible 4-20 mA output proportional to liquid level or space.
Academic text (1997) -
Two integral relays, as well as a 4- to 20-mA output, allow for a range of alarming and indication possibilities.
Academic text (1996) -
The transmitter provides an adjustable 4-20 mA signal and an open-collector sensor pulse output signal.
Academic text (1998) -
The control loop output is 4 to 20 mA or 0 to 20 mA.
Synonyms
A unit of electric current equal to one thousandth of an ampere
One thousandth of an ampere of electric current
Compounds
Surface Forms
Morphology
mA = ampere (transparent) = m + A
Standard SI prefix 'm' (milli) denotes one thousandth of the base unit 'ampere', so the meaning is directly compositional.
Etymology
MA stands for milliampere, where milli- means 'one thousandth' (the same 'milli-' in millimeter and milligram) and ampere is the unit for 'electric current'. So, mA is one thousandth of an amp, which is why small devices often use values like 20 mA.