Fluke 225C User Manual - Page 104

Fluke 19xC-2x5, digital reference

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Fluke 19xC-2x5 Users Manual ANALOG INPUT DIGITAL CONTROLLER ANALOG GROUND DIGITAL GROUND Figure 54. Parasitic capacitance between probes, instrument and environment MOTION/MOTOR CONTROLLER DC BUS + DIGITAL GROUND M - DC BUS Figure 55. Parasitic capacitance between analog and digital reference Figure 56. Correct connection of reference leads ANALOG INPUT DIGITAL CONTROLLER ANALOG GROUND DIGITAL GROUND Figure 57. 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. 94

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Fluke 19xC-2x5
Users Manual
94
Figure 54. Parasitic capacitance between probes,
instrument and environment
M
MOTION/MOTOR CONTROLLER
DC BUS
DC BUS
DIGITAL
GROUND
+
-
Figure 55. Parasitic capacitance between analog and
digital reference
ANALOG INPUT
DIGITAL CONTROLLER
ANALOG
GROUND
DIGITAL
GROUND
Figure 56. Correct connection of reference leads
ANALOG INPUT
DIGITAL CONTROLLER
ANALOG
GROUND
DIGITAL
GROUND
Figure 57. 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.