|Maintainer:||Axel Fischer (sweep-me.net)|
A Device Class to readout a Voltcraft Multimeter model VC840 or
The communication is based on COM port communication using a FS9721-LPX protocol. Any other multimeter using this standard can be read out as well.
Switching the mode of the multimeter during a measurement is not recommended any may lead to errorneous values.
The first return value is a float of the displayed value. The second value is a string of the momentary unit.