Keithley 3721-ST - Theory of Operation; Rear Panel, Backplane, and DMM Connect Relays Schematic

In this section:
Rear panel, backplane, and DMM connect relays schematic ... 8-1
Line cycle synchronization ....................................................... 8-2
AC voltage measurements and crest factor ............................. 8-5
DMM resistance measurement methods .................................. 8-7
Reference junctions ............................................................... 8-11
Open lead detection ............................................................... 8-13
Open thermocouple detection ................................................ 8-18
Accuracy calculations ............................................................. 8-20
Understanding Precision Time Protocol (PTP) ....................... 8-22
Rear panel, backplane, and DMM connect relays schematic
Refer to the following figure for a schematic of the rear panel, backplane, and DMM connect relays
with a typical card.
Section 8
Theory of operation