GENERAL DESCRIPTION OF THE ECHOMETER
A.
AMPLIFIER-RECORDER
The
amplifier-recorder receives
the
signals
from
the
microphone, amplifies
these
signals,
filters
the
signals
to accent desired information,
and
records
the
information on
heat
sensitive
paper.
The
controls
and
their
functions follow:
AMPLIFIER POWER SWITCH
II
Ur.its
built
after
June
1, 1985. Momentarily placing
the
switch
in
the
"On" position
energizes
the
amplifier circuit for four to five minutes.
Turning
on
the
chart
drive energizes
the
amplifier circuit for
an
additional four to five minutes. Additional
battery
life will be obtained
if
the
amplifier power switch is
momentarily
placed
in
the
"Off' position immediately
after
the
record
is
completed.
Units
built
before
June
1, 1985. A toggle switch controls power to
the
amplifier.
Turn
the
switch to "On"
and
allow
ten
seconds for stabilization. As a safety precaution, a safety switch
will
automatically
turn
off
the
power
when
the
lid is closed.
SENSITIVITY
Two sensitivity controls
are
located on
the
panel. The
higher
knob is
the
COLLAR
sensitivity control,
and
it
controls
the
sensitivity when
the
filter is
in
UPPER
COLLARS or
DEEP
COLLARS. The lower knob controls
the
sensitivity when
the
filter is
in
LIQUID LEVEL.
FILTER
The
Echometer uses a very effective filter system. The filter is labeled
UPPER
COLLARS,
DEEP
COLLARS
and
LIQUID LEVEL.
The
various filter positions
tune
the
system
to record
the
type
ofsignal desired.
UPPER
COLLARS
tunes
the
amplifier to
high
frequency
signals
which
result
in
the
collars being recorded
as
sharp,
distinct "kicks".
DEEP
COLLARS passes
medium
band
signals
and
records
these
signals
similar
to smooth sine waves.
DEEP
COLLARS
accents deep collars for
greater
accuracy
in
deep
w~lls.
LIQUID LEVEL
tunes
the
system
to
the
low frequency signals found from
the
liquid level
in
deep, low pressure wells.
The
UPPER
COLLARS filter position is used on shallow wells (less
than
4000 feet),
high
pressure
wells,
dirty
wells,
and
wells
with
irregular
length
tubing. The collars
are
recorded
as
"sharp"
kicks.
The
DEEP
COLLAR filter position
is
recommended for most low pressure, deep wells below
4000 feet.
With
normal conditions,
the
upper
collars
are
strong
and
distinct,
and
the
liquid level
is
strong
and
distinct,
but
the
lower collars
are
weak
and
they
become indistinct.
The
DEEP
COLLAR filter position will accent
these
signals while removing undesired
background
noise
and
result
in
the
recording
of
lower collars. This is a more accurate record
than
a record
without
the
lower collars recorded.
