Fluke ScopeMeter 192B User Manual page 84

Fluke 192B - 196B/C - 199B/C
Users Manual
Figure 42. Parasitic capacitance between probes,
instrument and environment
MOTION/MOTOR CONTROLLER
DIGITAL
GROUND
Figure 43. Parasitic capacitance between analog and
digital reference
76
DC BUS +
M
-
DC BUS
ANALOG INPUT
ANALOG
GROUND
Figure 44. Correct connection of reference leads
ANALOG INPUT
ANALOG
GROUND
Figure 45. Wrong connection of reference leads
Noise that is picked up by reference lead B can be
transmitted by parasitic capacitance to the analog input
amplifier.
DIGITAL CONTROLLER
DIGITAL
GROUND
DIGITAL CONTROLLER
DIGITAL
GROUND