• Signal and control wiring should be, at a minimum, in twisted pairs. Lines for
magnetic pick-ups and other frequency output devices should be run in
separate shielded cables.
• Try not to use commutators or slip rings to transmit low-level signals. Should
this be absolutely necessary, ensure that the point of contact is maintained and
clean at all times. Refer questions about this type of application to your local
distributor.
• Connect the drain from shielded cables so that no current flows in the
shielded cable by first connecting all shield segments in series, then to the
appropriate connection on the tachometer or to an approved earth ground
nearest the instrument.
• Provide a power source that is free of electrical noise and power interruption.
Use either the available AI-TEK DC power supply or one that can operate
within the limits of the instruments specifications. Battery chargers should be
avoided unless isolation can be provided between the tachometer and charger
system.
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