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42 - Microsense II Model 5300 Gaging System
Appendix A: Grounding
Electrical grounding issues are important to capacitive gaging. This type of transduction generally requires
that the target be connected to the circuit ground of the Model 5130 module.
Target Grounding
The target must be connected to the circuit ground of the gaging system. The Model 5130 has been
designed so that the probe housing is grounded. An electrical connection from the probe shell (or the fixture
holding the probe) to the target will provide the necessary ground.
Chassis Ground
The chassis of the Model 5130 gaging module is always capacitively coupled to Analog Ground. A jumper
has been provided (P13) which will explicitly ground the chassis. The default configuration is with the
jumper in place. This will connect the case to ground directly.
For some applications, it may be desirable to remove this jumper to improve noise performance or remove
ground loops caused by the fixtured position of the Model 5130 module.
Analog Return
The ARTN connection (P27) may be used to reduce noise due to non-uniform grounds between the Model
5130 and any data collection equipment. ARTN is a separate return which allows external equipment to
float +0.1V from analog ground. This allows the creation of a “pseudo-differential” connection to external
monitoring equipment to prevent ground loops.
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