technoac AP-019.1, Руководство по эксплуатации

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DEVELOPMENT, MANUFACTURING AND SUPPLY OF INSTRUMENTATION
25
1. One output of the
transmitter should be
connected to the point
of communication that
more distant from the
supposed place of the
defect (start of the
diagnostic site). The other
output of the generator is
grounded on the maximum
possible distance from
the communication.
From the other side (end
of the diagnostics site),
the communication is
grounded at the most
possible distance from the
communication. 2. The transmitter in the
mode «2F» sends to the
communication the signals of
two frequencies (1024Hz and
8192Hz) simultaneously.
8. Performing cable route location in the mode «2 frequencies»
The mode «2 frequencies» was added for determination of the signal direction in cable.
Additional possibilities of the mode are described in App. 2:
Append. 2 p.3 Amplitude «two-frequency» method «
Δ
A»;
Append. 2 i.4 Phase «two-frequency» «
Δφ
»
two-segment scale for
input signal level
«Off-scale reading»
is not available.
amplification control method
The amplification control in
this mode can be carried out
both manually (by short
pressings of buttons «more
less» ) and automatically (after «long»
pressing of any
«more less»
total level of the
frequency (А8+А1)
ratio of amplitudes of
frequency components
(А8/А1)
change of the phase difference
of the frequency components
Δφ
Signal direction («straight»/»back»)
The mode «2 frequencies» is realized only with the contact method of
connection
of the transmitter
signal levels at frequencies 1024
and 8192 Hz