Read LCR meter results.
Sets LCR meter mode if not already set.
Waits for next unread data if necessary.
Clears new data available bit read by
DAV?
11 data values separated by commas:
freq, Vmag, Amag, impedance,
phase, R, C, L, tan, Qf, reactance
LCR? waits for next unread data.
LCR? without specifying the phase returns
the appropriate single phase data.