GAC LSM201 Manual - Halaman 11

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TROUBLEShOOTING (CONTINUED)

EMi SUSCEPtiBilitY

The governor system can be adversely affected by large interfering signals that are conducted through the cabling or through direct

radiation into the control circuits.

All GAC speed control sensors contain filters and shielding designed to protect the units sensitive circuits from moderate external

interfering sources.

Although it is difficult to predict levels of interference, applications that include magnetos, solid sate ignition systems, radio transmit-

ters, voltage regulators or battery chargers should be considered suspect as possible interfering sources.

If it is suspected that external fields, either those that are radiated or conducted, are or will affect the governor systems operation,

it is recommended to use shielded cable for all external connections. Be sure that only one end of the shields, including the speed

sensor shield, is connected to a single point on the case of the speed control unit. Mount the speed control to a grounded metal

back plate or place it in a sealed metal box.

•

Radiation is when the interfering signal is radiated directly through space to the governing system. To isolate the governor sys-

tem electronics from this type of interference source, a metal shield or a solid metal container is usually effective.

•

Conduction is when the interfering signal is conducted through the interconnecting wiring to the governor system electronics.

Shielded cables and installing filters are common remedies.

In severe high-energy interference locations such as when the governor system is directly in the field of a powerful transmitting

source, the shielding may require to be a special EMI class shielding. For these conditions, contact GAC for specific recommenda-

tions.

LSM200 Series Load Sharing Modules 6-2021-B1 PIB4100