Teledyne ADFM Analog Output Module, Техническое руководство, Страница: 17 / 156

Introduction to the ADFM Velocity Profiler™
•
Only fuses with the required rated current, voltage, and specified
type should be used. Do not repair fuses or short circuit fuse-
holders. To do so could cause a shock or fire hazard.
•
Do not install substitute parts or perform any unauthorized modi-
fications to the instrument.
•
Certain test measurements described in the manual are performed
with power supplied to the instrument while protective covers
are removed. Energy available at many points may, if contacted,
result in personal injury.
•
Any maintenance and repair of the opened instrument under volt-
age should be avoided as much as possible, and when inevitable,
should be carried out only by a skilled person who is aware of
the hazards involved.
•
Capacitors inside the instrument may still be charged even if the
instrument has been disconnected from its source of supply.
1-4 ADFM Components Overview
Figure 1-13 illustrates the three major components of a ADFM system. Two
components are installed at each site: a transducer, installed in the bottom
of a pipe or channel, and its Electronics Unit, installed nearby in a non-
hazardous atmosphere. These two components communicate with the third
system component, a remote host IBM compatible PC computer, either via
a Modem, or a serial data interface (RS-232 or RS-422).
Laptop computer
Computer with Modem
Transducer Transducer cable
Telephone line
Serial cable
Figure 1-1. ADFM Components
ADFM Technical Manual (January 2000) page 1-3