A & A Scales PT300, Руководство по обслуживанию

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PT300, Service Manual
Rev B, October, 2000
5
Scope of manual
This service manual describes the Intercomp PT300 scale specifications, theory of
operation, interconnection, calibration, and servicing. Please refer to the users manual
for detailed operating procedures and application information.
This manual is separated into several sections, each containing information on a
different aspect of the scale. The specifications show the design parameters for the
scale. The theory section includes a circuit description and theory of operation that
explains how the scale works. The service section provides information for
troubleshooting a defective circuit. The calibration section explains how to set the
scale adjustments. The interconnection section shows the way two or more scales
work together to form a larger system. The assembly instructions show correct
assembly and disassembly techniques.
This manual is not designed to be a substitute for proper training in the installation,
operation, maintenance or service of PT300 electronic scale. It is to be used as a
guide for training service personnel or as a reference source for training previously
received.
Caution
Your PT300 scale is covered by a one year warranty and should be referred to the
factory for maintenance within the warranty period. Attempts to make any extensive
repairs within the warranty period may invalidate the warranty. If repairs are needed
after the warranty period, only qualified technicians should attempt such repairs. An
understanding of the principles of operation of the PT300 circuitry as described herein
in necessary for rapid troubleshooting and repair of any scale malfunction.