Fluke 196C Telescope User Manual


 
Tips
Using the Independently Floating Isolated Inputs
7
71
Figure 44. Parasitic capacitance between probes,
instrument and environment
M
MOTION/MOTOR CONTROLLER
DC BUS
DC BUS
DIGITAL
GROUND
+
-
Figure 45. Parasitic capacitance between analog and
digital reference
A
NALOG INPUT DIGITAL CONTROLLER
ANALOG
GROUND
DIGITAL
GROUND
Figure 46. Correct connection of reference leads
A
NALOG INPUT DIGITAL CONTROLLER
ANALOG
GROUND
DIGITAL
GROUND
Figure 47. 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.