DEVELOPMENT, MANUFACTURING AND SUPPLY OF INSTRUMENTATION
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7. Perfoming the cable location in the mode «Minimum maximum»
In the mode
«Minimum maximum»
, the device works simultaneously both on the method
«maximum» and method
«minimum»
. This mode is used in the conditions of the distorted field,
in the presence of the nearby utilities, at the low induced signal. It allows to perform location, to
determine presence and location of the utilities located nearby.
In the
«Minimum maximum»
mode the receiver display is divided in two halves. The moving
diagram of the signal level change is displayed in the upper part by the
«minimum»
method
- when located over the cable the signal is minimal, when deviating from the axis - the signal
increases, in the bottom part - the moving diagram of the signal level change depending on the
time by the «maximum» method - when you stand over the cable, the signal is maximum, when
deviating from the axis - the signal decreases.
In this mode the value of the depth and current in the communication are not displayed
.
the signal level change
diagram, at each updating
of the display, the graphic is
automatically shifts by one
position to the left, and the
end right position is filled with
the new value
digit indicating the current
(maximum right)percentage
value of the signal
amplification regulation
method
receiver amplification
coefficient in dB
change of the image scale
the input signal type set in the receiver (continuous or
impulse)
frequency of the filter
set
indication of the
«LS»
work
mode
current value
of the input signal
graphical
display of the maximum
value of the input signal
for the previous second
maximum value of
the input signal for the
previous second in the
percentage of the scale
change of the
«LS»
work
mode
The cable route location shall be performed similarly to route location in the Graphic mode,
orienting on the maximum level of the signal on the lower scale of the graphic and minimum level
of the signal on the upper scale. To determine the number of the nearby communications, you
should step aside from the axis of the located cable and go straight across to the communication
axis to visualize the amount and place of the route of communications.
the
presence of two
communications
close to each other
presence
of the single
communication
Summary of Contents for AP-019.1
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