Command ReadValue :

Return the last measured value for the given channel.
Measurement type: 0 -> temperature, 1 -> resistance, 2 -> voltage single ended, 3 -> voltage differential

ReadValue Definition
Input Argument	Tango::DEVVAR_LONGARRAY	Channel Number, measurement type
Output Argument	Tango::DEV_DOUBLE	Measured value
DisplayLevel	OPERATOR	..
Inherited	false	..
Abstract	false	..
Polling Period	Not polled	..
Command allowed for	All states	..