aqua-tronics cable detector digi-7 Benutzerhandbuch

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The Digi-7 line locator is two locators built into one.  Both receiver and transmitter will operate in a full automatic mode or
a full manual mode with the push of a button.

The Model I.C.49, I,C,56, or I.C.56WT Inductive Couplers are used to help identify one line from other utilities even though
they are sharing a common ground.

RECEIVER: When the receiver is first turned on, all of the information available on the LCD is displayed for approximately
3 seconds.  A battery symbol in the upper right hand corner will show the approximate battery voltage is then displayed for
about 2 seconds.  With the receiver turned on, pushing the battery test button will show the approximate battery voltage and
the battery symbol.   If the batteries reach a low voltage during operation, this battery symbol will start flashing.  When a
low battery condition exists, the batteries should be replaced with six AA batteries.  Any type of AA battery can be used,
but Alkaline will provide a much longer life.  A thumbscrew allows entry to the battery compartment where a battery hold-
er can be removed for battery replacement.  Disconnect the battery snap connector to remove the battery holder.

TRANSMITTER: The battery voltage is continuously monitored when the transmitter is on.  If the voltage should drop, the
decimal point on the numerical display will start to flash.  The batteries should be replaced by 6 alkaline D cells.  Remove
the battery tube plugs to change the batteries. Three batteries are located on each side.  The + side of the batteries face
"IN" when being installed.  See Fig. 1. After one minute of operation, the transmitter will enter a battery saving mode and
shut off all test circuits that are not needed.  At this time, the numerical display will start flashing every 10 seconds.

RECEIVER
Turn on the receiver by rotating the large knob (on-off / sensitivity / volume) control clockwise.  When the receiver is first
turned on, the LCD (meter display) will display all of the information available in the different modes of operation.  The
receiver will go through a self-test of all functions and display the battery condition.  This will take somewhere between 5
to 7 seconds before the receiver is ready to operate.  The receiver will always power up in the Automatic Peak Mode of
operation.  

Flags or little arrowheads on the display point to the mode of operation, either Peak or Null.  On the right side of the display,
the decal has a "LOW SIGNAL" and a "PEAK" flag.  On the left side of the display the decal has a "MANUAL" and a "NULL"
flag.  These arrowheads indicate which antenna is operating and which mode the receiver is operating in. The settings can
be changed with push buttons that are located between the handle and the LCD display.

The button closest to the handle changes the receiver operation between  NULL and PEAK.  The button nearest the display
changes the receivers operation from AUTOMATIC to MANUAL as well as battery test.  

The Digi-7 can be used in several ways to locate the depth, however the Manual Mode - NULL is the easiest to use.   The null
or peak method can be used, but in the peak mode the position of the receiving antenna is more critical and this is not the
case in the null mode.

On a 45º right triangle, two of the sides will always be equal. There is a bubble level to the left of the receiver’s NULL-
PEAK switch. When the bubble is half way between the center ring and the outer black housing, the instrument is at a
45º angle.

When the line has been located and marked, move off to one side of the location with the bubble set at 45º. Move away
until a null point has been found with the nose of the antenna touching the ground. Mark that spot.  See Fig 10. Measure
the distance between the LOCATION MARK, and the DEPTH MARK. The depth of the line will be the distance between
these two marks.

The sensitivity control may have to be adjusted while making a depth reading. The null found should be sharp enough to
pinpoint the spot you want to mark. Also, bear in mind that the distance is calculated at a 45º angle from the receiving
antenna. The calculation will have to take into account any slope of terrain, or the height that the receiving antenna is
held above the ground when the depth measurement is being made.

When possible, a depth reading should be made from both sides of  the line being traced. If both measurements agree

with each other, the operator can assume a good depth measurement has been made, and the locate is fairly accurate. If
the two depth readings do not agree with each other, relocate the line and then repeat the two depth measurements. This
will verify if there is an error with this locate. If the two depth readings are still not the same, care should be used when
digging this locate. Other utilities are in the same area, creating a distorted field pattern. This distortion means your
locate could be marked off to one side of the line actually being traced.