Keithley 3706a high performance digital multimeter dmm with six slots keithley 3706a p the keithley 3706a is a high performance digital multimeter dmm and contains six slots for plug in cards in a compact 2u high 89mm enclosure the multimeter easily accommodates the needs of medium to high channel count applications when fully loaded a mainframe can support up to 576 two wire multiplexer channels for unrivalled density and economical per channel costs p p the high performance mul