Goldak Goldak 2310 User manual

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Copyright© 2004 Goldak Inc.
All rights reserved
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By using this product and its associated materials,provided by Goldak Inc., the user agrees to the following terms:
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The electronic instrumentation and accompanying materials are provided “as is”,with a limited warranty of one (1)
year on material defects and workmanship.There is no warranty provided or implied regarding the merchantability
and fitness of this product for a particular purpose.
Goldak Inc.does NOT warrant that the features and capabilities of this product will meet your requirements,or that
operation of this product will be uninterrupted or error free.
The entire risk as to the use,quality,and performance of this product is with you,the user.Should the product prove
to be defective,you,and not Goldak Inc., assume the entire cost of any necessary repair.
However,Goldak Inc.DOES warrant that the electronic instrumentation provided is furnished free from defects in
materials and workmanship under normal use for a period of one (1) year from the date of delivery to you as
evidenced by a copy of your invoice/receipt.
Goldak Inc.’s entire liability and your exclusive remedy as to the product provided (subject to you returning the
product to Goldak Inc.or to an authorized dealer with a copy of your invoice/receipt) will be the repair or
replacement of any defective portion of the product,up to and including the entire product.If Goldak Inc.or an
authorized dealer is unable to repair or replace the product under the terms of this warranty,then the purchase price
will be refunded.
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Goldak Inc.assumes no liability pertaining to the accuracy of the results derived from the use of this product.
Because of the many unknowable and uncontrollable variables in locating job situations,apparent results when using
this product may be erroneous and should not be taken as absolute.Ultimate responsibility for interpretation of all
results reported by this product rests on the user alone.
Goldak Inc.reserves the right to modify this and all of its products for the sake of improvement at all times.
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IN NO EVENT WILL GOLDAK INC.BE LIABLE FOR ANY DAMAGES,INCLUDING LOSS OF PROPERTY,LOST
PROFITS,COST OF COVER OR OTHER SPECIAL,INCIDENTAL,CONSEQUENTIAL OR INDIRECT DAMAGES ARISING
FROM THE USE OF THIS PRODUCT OR ACCOMPANYING MATERIALS,HOWEVER CAUSED AND ON ANY THEORY
OF LIABILITY.THIS LIMITATION WILL APPLY EVEN IF GOLDAK INC.OR AN AUTHORIZED DEALER HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.YOU ACKNOWLEDGE THAT PURCHASE AND USE OF THIS
PRODUCT REFLECTS THIS ALLOCATION OF RISK.SOME JURISDICTIONS DO NOT ALLOW LIMITATION OR
EXCLUSION OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES,SO THE ABOVE LIMITATION MAY
NOT APPLY TO YOU.
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This Agreement will be governed by the laws of the State of California,U.S.A.In any dispute arising out of this
Agreement,Goldak Inc.and you each consents to the jurisdiction of both the state and federal courts of Los Angeles
County,California,U.S.A.
This Agreement is the entire agreement between us and supercedes any other communications with respect to the
product and accompanying materials.
If any provision of this Agreement is held to be unenforceable,then the remainder of this agreement shall continue in
full force and effect.
If you have any questions,please contact:
Goldak Inc., [phone]
e-mail: sales @ goldak.com
547 West Arden Ave.
Glendale,CA 91203
All trade names referenced are the trademark or registered trademark of their respective holder.
Goldak and TRIAD™ Digital Locating System are trademarks of Goldak Inc.

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Since  Goldak Inchas manufactured topoftheline underground
locating equipmentWith the introduction of the Triad Model  Digital
LocatorGoldak has set a new standard in portable locators
The Triad series of locators are designed with one key goal in mind: to
simplify underground locating tasks for the userThe advanced signal
detection system and stateoftheart digital electronics work together to
make these tasks straightforwardintuitiveand quickly managedThe
batterypowered Model  Receiver is lightweight and ergonomically
balancedand folds into a compact storage configurationActivated and
controlled by a single triggerthe  Receiver aides the operator in locating
underground lines (pipescablesetc) or coiltype transmitters (aka
"sondes") with easytounderstand visual and audio cues
Menus that are designed to be intuitive and selfteaching make the Model
 easy to operate regardless of one’s level of experiencebeginner to
expertWith features such as automatic tuning and gain controlautomatic
depth reportingmultiple frequenciesconstant numerical responsesearch
direction indicatorsand morethe user will recognize that the Model 
Digital Locator is truly one of a kind
Triad Locating System
The entire locating system consists of the Model  Receiverthe Model
X Transmitter Caseand miscellaneous accessoriesThe standard
accessories included with the basic system are a directconnection cable
(DCC)a ground rodand operating instructionsOptional accessories are
numerousand can be purchased to perform specific kinds of jobs
Before you get started…
It is important that the operator become familiar with this manual and with
other basic safety recommendations (Appendix D) prior to using the Triad
locating systemAlsothe operator should make sure that batteries are
installed in both the  Receiver and the X Transmitter Caseand that the
batteries are in good conditionTo access the battery compartments for the
 Receiver and the X Transmitterplease follow the instructions in
Appendix B“Care and Maintenance”of this manual

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The primary component of the Triad Locating System is the  ReceiverIt
has been designed to be lightweightergonomicand easytouseTaking
advantage of breakthrough technologythe  Receiver provides realtime
intuitive information to the user that makes locating jobs simple to
understandThe only control is a singlegunstyle triggerwhich gives the
user quick access to the Receiver’s featuresA crisp LCD display screen and
robust speaker output provide the user with the intuitive information needed
to make quick locatesRefer to the graphic below and the opposing page to
understand more about the physical features of the  Receiver

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DDiiiiss sspp ppllllaa aayy yy
A sharphighcontrast LCD screen that provides visual
feedback to the user during set up and locating operations
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PPiiiiss sstt ttoo oollll GG GGrr rriiiipp pp aa aann nndd dd TT TTrr rriiiigg gggg ggee eerr rr
The pistol grip is molded for comfort and
positioned for ergonomic balance while operating the  Receiver
The trigger is positioned comfortably for gunstyle operationThe
trigger is the only control feature on the entire instrumentPlease
read Operating Details for more information about using the trigger
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SSpp ppee eeaa aakk kkee eerr rr
The speaker provides strong audio feedback to the user
during operationThe volume of the speaker output is usercontrolled
FF
FFoo oolllldd ddiiiinn nngg gg AA AAnn nntt ttee eenn nnnn nnaa aa AA AArr rrmm mm
While being operatedthe receiver is
configured in a slenderbalanced package that is easy to wieldThis is
the “unfolded” positionTo store the receiverit must first be
collapsed (folded)To do thisthe antenna arm swings around the
swivel point ° to the folded position
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““PP PPoo ooiiiinn nntt ttee eerr rr”” ”” AA AAnn nntt ttee eenn nnnn nnaa aa
Mounted on the end of the folding arm is the
“pointer” antennaso called because it effectively points directly at the
object being located
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BBaa aatt tttt ttee eerr rryy yy CC CCoo oomm mmpp ppaa aarr rrtt ttmm mmee eenn nntt tt
Found on the underside of the receiverthis
easyaccess springloaded compartment houses the power supply for
the  ReceiverThe receiver requires eight () “AA” size alkaline
batteries to operate (carbon batteries NOT recommended)
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CCoo oonn nnnn nnee eecc cctt ttiiiioo oonn nn PP PPaa aann nnee eellll
Also found on the underside of the receiverthis
panel area provides plugin access for various accessories
(a) Headset JackFound in the middle
of the panelthis jack allows for an
ohm headset with a mm plug
to be connectedWhen the
headset is plugged inthe builtin
speaker no longer emits a sound
(b) Auxiliary Antenna PortWith the
appropriate adapterthis port
allows the user to connect up to two external antennas into the
 ReceiverSome examples of such antennas are a cable clamp
(for identifying a specific cable among a grouping of cables) and
an enhancedsensitivity detection antenna
(c) Communications PortThis port allows the receiver to
communicate with external devices via standard RS protocol
(d) ResetThis is a small pinpoint hole in the panel that allows the
user to reset the ’s internal computerusing for instance the
open end of a paper clip

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Built into the carrying case for the Model  Receiver is a powerful and
versatile lineenergizing transmitterthe Model XIt has the capability to
energize lines both by direct hookup and by an inductive fieldIt provides
flexible power level and multiple frequency options (standard and custom)
including three for inductive energizingAlsothe X control panel provides
a PULSE optionfor identifying the transmitting signal in difficult tracing
situations*A detailed description of the transmitter case features follows
* PULSE is included for compatibility with receivers other than the  It should NOT be used with
the Model  Receiver

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This panellocated under the left latch cover of the
casecontains all of the buttons used to activate and control the
transmitterAlso located on this panel is the LCD displaywhich
reports the modethe frequencythe output leveland other
information
ON ButtonPress this to activate the transmitter
OFF ButtonPress this to deactivate the transmitter
Select ButtonThis button advances the adjustment mode
Up ButtonThis button advances to the next highest setting
(eg frequency or power level)
Down ButtonThis button selects the next lowest setting
PULSE ButtonPress this button to cause the signal to pulse
(see note on previous page)Hold the button for seconds to
display the status of the internal battery
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OOuu uutt ttpp ppuu uutt tt PP PPaa aann nnee eellll
Located under the right latch coverthis panel contains
three jacks that are used for signal output and power input
Direct Output JacksThese are labeled “SIGNAL[]” and
“SIGNAL[]”The jacks are for standard /” mono phone
plugs (typically on a Direct Connection Cable)The SIGNAL[]
jackwhen used by itselfoutputs twice the standard signal
level of the SIGNAL[] jackWhen used in conjunction with
the SIGNAL[] jackthe SIGNAL[] jack outputs a standard
signal level
Auxiliary DC Power InputThis jack takes a standard mm
DC power input plugwhich is typically used on AC/DC wall
transformer power suppliesThe rated voltage of the external
supply should be no higher than V and no lower than V
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IInn nntt ttee eerr rrnn nnaa aallll BB BBaa aatt tttt ttee eerr rryy yy
The battery compartment is inside the caseon the
half where the  Receiver is storedThe compartment takes a 
Volt Alkaline CCell removable moduleTo access the batteryunscrew
the two thumbscrews that hold the battery cover in place
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LLaa aatt ttcc cchh hh CC CCoo oovv vvee eerr rrss ss
These secure the instrument in the closed position while
protecting the Control and Output panels
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SSuu uupp ppee eerr rr II IInn nndd dduu uucc cctt ttiiiivv vvee ee CC CCaa aapp ppaa aabb bbiiiilllliiiitt ttyy yy
A special patented antenna system is built
into the transmitter caseWith this special antennathe X
transmitter is the most powerful inductive line energizer available

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[[
[[ ]] ]]
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DDiiiirr rree eecc cctt tt CC CCoo oonn nnnn nnee eecc cctt ttiiiioo oonn nn CC CCaa aabb bbllllee ee (( ((DD DDCC CCCC CC)) ))
Use the DCC to inject a signal directly
(via electrical contact) into the target lineAdvantage: better than
using inductive mode for assuring
that target line is only thing
energizedAlsoeliminates air
coupled signals that come from the
transmitter case itselfDisadvantage:
part of line must be electrically
exposed to use the DCCwhich
sometimes is impracticalAlso
requires adequate ground return to
cause strong signal on line
[[
[[ ]] ]]
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GGrr rroo oouu uunn nndd dd RR RRoo oodd dd
This simple accessory can be used to
establish good grounding for direct connection to
a lineAdvantage: establishes better ground
return when used than when not used
Disadvantage: must have penetrable terrain to
use it
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[[
[[ ]] ]]
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This is the noncontact version of the DCCUse
the Inductive Clamp to energize the target line by plugging into a Model
X direct output jack and clamping around a portion of the line
Advantages: no electrical contact
point needed; very effective at
energizing the target line only
even in congested areas
Disadvantages: part of line must
be mechanically exposed enough
to get clamp around it; limited
target line diameter (up to about
” OD)
[[
[[ ]] ]]
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TTrr rraa aann nnss ssmm mmiiiitt tttt ttiiiinn nngg gg SS SSoo oonn nndd ddee eess ss
These are smallcapsuletype transmitters that
may be located only in the immediate area surrounding the transmitter
They are usually inserted inside nonmetallic lines in order to pinpoint a
location in the linebut can be used for a variety of applications
Typicallytransmitting sondes are batteryoperated and watertight
(a) The
Model  “Flusher” is a
watertight capsule transmitter
designed specifically to be flushed
down a toilet or a sewer cleanoutThey
are most often used for locating septic
tanks



(b) The Model  “Bullet” is also watertightand is
small and streamlined to fit into nonmetallic
conduits down to /” in diameterNormallythe
“Bullet” is attached to a fishtape and fed down
empty conduit linesHoweverit can be used in a
number of applications
(c) The Model  “TapeOn” is a watertight
roughly cylindrical transmitter designed
to attach “piggyback” on a sewer rod
sewer snakehydrocleaneror camera
reel
(d) The Model  “Navigator” is the largest and most powerful of
the insertable transmitters and
is typically used in city main
sewer lines
(e) The Model SRK is a small but powerful transmitter that is
designed to provide greater flexibility in locating jobs while
maintaining good locating rangeDesigned for inline attachment
(sewer snakespush rods
etc)the SRK is
streamlined to go where
many other transmitting
sondes cannot
[[
[[ ]] ]]
HH
HHee eeaa aadd ddss ssee eett tt
The  Receiver includes a 
mm jack to accommodate this accessory
an Ω walkmanstyle headsetOther
headsets with compatiple plugs and
ohmages may also be used
[[
[[ ]] ]]
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This twoprong
AC wall socket adapter that supplies
unlimited power to the X Transmitter
This is especially useful when the X drives
heavy loads at audio frequencies for long
duration[Specs: Input  VAC Hz
 W; Output  VDC @ Amp; Plug
dimension ø x  mm]
[[
[[ ]] ]]
CC
CCaa aarr rr BB BBaa aatt tttt ttee eerr rryy yy AA AAdd ddaa aapp pptt ttee eerr rr
An external power supply cable that plugs into a
standard automobile cigarette lighter socketFully extendedit is 
feet in lengthand comes with the mm plug required by the X DC
input panelLike the AC
power supply aboveit is
recommended to be used in
lowfrequencyhighoutput
applications


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[[
[[ ]] ]]
AA
AAcc cccc ccee eess ssss ssoo oorr rryy yy BB BBaa aagg gg
A canvas pouch
that mounts neatly on the
outside face of the transmitting
caseThis bag provides flexible
and easily accessible storage for
all of your instrument
accessories
[[
[[ ]] ]]
AA
AAlllltt ttee eerr rrnn nnaa aatt ttee ee AA AAnn nntt ttee eenn nnnn nnaa aa AA AAdd ddaa aapp pptt ttee eerr rr
This special adapter plugs into the antenna
port on the underside of the  ReceiverIt converts the port input to
two standard /” jacksthat may be used for a variety of special
applications

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 

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OOPP
PPEE EERR RRAA AATT TTII IINN NNGG GG DD
DDEE
EETT TTAA AAII IILL LLSS SS
MM
MMOO OODD DDEE EELL LL      RR RREE EECC CCEE EEII IIVV VVEE EERR RR
Trigger Usage
The first important step in learning how to use the  Locating Receiver is
to understand and master the simple functions of the gunstyle trigger
Having learned the two basic trigger commandsthe user will be well on the
way to properly and efficiently using this locator
The trigger functions much like the button on a computer mouseThe two
trigger commands are CC
CCLL LLII IICC CCKK KK and CC CCLL LLII IICC CCKK KK HH HHOO OOLL LLDD DD:
To CC
CCLL LLII IICC CCKK KKpull and quickly release the triggerIn generala CLICK
will turn the Receiver on and off (when no menus are active);
alsowhen a menu or control strip is activea CLICK will always
advance to the next choice on the menu or control strip
To CC
CCLL LLII IICC CCKK KK HH HHOO OOLL LLDD DDpull the trigger and hold it in until the desired
action takes place (this takes a halfsecond or so)CLICKHOLD
always chooses the highlighted choice in the active menu/control
strip
Mastering the trigger functions is not difficultand knowing them is essential
in using the receiver efficientlyFor your convenience these instructions for
trigger usage are summarized on the triangular serial number label on the
underside of the  Receiver
Preparing to Use the Receiver
When removed from the casethe  Receiver will be in its (a) compact
storage configurationTo unfold it(b) swing the lower antenna arm in a
clockwise direction ° about the swiveluntil it is fully extended in its
operating position
Activation
To turn on the Receiversimply CLICK the
triggerUpon startupthe receiver display will
momentarily present the Goldak logoThe logo
screen will scroll openand the following control
screen will be presented:


 
At the top of the screen you will see
a memory strip indicating the most
recent device set up (ie that was
used on the previous locating job)
At this timeyou may either
continue to locate with the stored
settings (RESUME)or opt for new
settings (NEW SET UP)Notice that
a small timer icon appears in the
upper right corner of the screen
When this graphic “timesout”any
active menu will be removed from
the screenand the receiver will
return to its original operating
settings
To RESUME: Verify that the icon is pointing at “RESUME” in the
startup menuthen CLICKHOLDThe receiver is now ready
to locate(NOTE: the icon will always point at
“RESUME” at startupmaking it very easy to continue with
an ongoing job)
NEW SET UP: To opt for new settingsCLICK to advance the icon to
“NEW SET UP”then CLICKHOLDThe display will then
immediately present the “Set Frequency” screen shown
below
SETTING THE FREQUENCY
As the menu graphic to the right
indicatesthere are three different ways
to set the receiver’s locating frequency:
by scanning for itby selecting it from a
catalogor by selecting the “passive”
mode
Setting Frequency by Scanning
Using the “BY SCAN” Option will
automatically tune the  Receiver to
the exact frequency of the transmitting
source (ie Model X Transmitter
another active line energizera “sonde”
or a camera head)To do thishold the receiver with the pointer antenna
aimed directly at the active transmitting sourceand held about to feet
away from itCLICK the icon to point to “BY SCAN” and then CLICK
HOLD
You will see the word “SCANNING” flashing
on the screen while the receiver scans for
the active transmitterIf SCAN fails to
detect anythingyou will here a lowpitched
toneand the  will return to its previous
operating mode


 
When scanning for a signal that has been set up by a DIRECT connectionif
SCAN fails to work by holding the pointer around the supposed area of the
energized linethen try draping the red lead from the DCC over the pointer
antenna and reattempting SCANThis will guarantee that the tracing signal
will be detected
After a successful scanthe display
will report as shown to the left
Having detected a signal from an
active transmitterthe receiver will
automatically present the “SET
LOCATING MODE” menuTo
continuefollow the instructions
for setting the locating mode given
on the following page of this
manualIf you are unable to SCAN
successfullyplease refer to
Appendix C“Troubleshooting”for
more help
Setting Frequency from the Catalog
The “BY CATALOG” option allows the user to choose the desired receiver
frequency manually from a list of precatalogued selectionsTo use this
featureCLICK the icon to “BY CATALOG” in the menu and then CLICK
HOLDDoing so will call up the catalog menu shown below
Visually scan the first page of the
catalogIf your desired frequency is
not foundCLICKHOLD with the
icon pointing at “NEXT PAGE” and
continue to search (NOTE:
frequencies are organized from
lowest to highest as you advance
from page to page)Once you have
found the desired frequencyCLICK
the icon to that frequencyand
CLICKHOLD to select itOnce the
frequency is selectedthe display will
automatically advance to the “SET
LOCATING MODE” menuTo learn
more about thislook at the instructions for setting the locating mode on the
following page of this manual
Selecting Passive Mode (Hz Line Tracing)
To select passive modeCLICK the icon to “Passive ( Hz)” on the menu
and CLICKHOLDOnce this mode is selectedthe receiver will automatically
enter the Triad LINE modeIf you wish to select a different locating mode
follow the instructions given in the next section“Set Locating Mode”


 
SETTING THE LOCATING MODE
While performing the automatic set
up routineand after the frequency
has been selectedthe receiver will
prompt the user to select the desired
locating modeas shown to the right
Visually scan the “SET LOCATING
MODE” menuand CLICK the trigger
to advance the icon to point to
the desired selectionThen CLICK
HOLD the trigger to make the
selectionNOTE: choices on this
menu will vary depending upon the
specific model type of the receiver (“SC”“UL”etc)The various locating
modes are listed and described here for reference
LINE (Triad) Mode
Select this mode to graphically display a representation of the target line on
the screen while it is being tracedThis mode is fully automaticrequiring no
user intervention after set up to perform its functionIt displays line position
and directionand automatically calculates the depth and depth accuracy
when the pointer antenna is positioned over the buried line
SONDE (Triad) Mode
This mode aids the user in locating a sonde by displaying a graphic icon
representation of its orientation and relative positionAs the user
approaches the sondethe audio response will gradually increase in pitchand
the display will indicate which way to position the receiver so that it “points”
at the sondeAs the receiver homes in on the sondethe centering circle
constricts about the sonde iconAt the same timethe approximate depth of
the sonde will be displayed in the upper right corner of the LCDWhen the
circle fully constricts about the icon and the  Receiver points directly at
the sondethe depth reading will stabilize on an actual value and the actual
orientation of the sonde will be evident from the icon
PEAK Mode
This is a conventional locating mode“Conventional” means that this method
of locating is common to many locating devices industrywideincluding
many Goldak productsIn PEAK modethe user relies on the relative
directional response around the target object to determine locationThus
PEAK mode only provides a bartype relative response graphicwhich
accompanies the ANR that is always onscreen in the upper left corner of the
displayPEAK mode responds only to signal that is detected in the
horizontalsidetoside direction
NULL Mode
Like PEAK modeNULL mode is conventionalIt presents that same bartype
graphic as PEAK modeHoweverNULL mode responds only to signal that is
detected in the vertical direction (see graphic in upper right corner of
display)This means that the response vanishes when the signal field is
perfectly horizontal


 
WHILE LOCATING…
After the initial set up routinethe  Receiver is completely automaticTo
searchlocateand pinpointsimply follow the visual and audio cues on the
display and from the builtin speaker
Features of Display During OperationWhen either of the special “Triad”
locating modesLL
LLII IINN NNEE EE or SS SSOO OONN NNDD DDEE EEare being usedthe LCD display presents the
basic screen shown below
A brief description of each display feature follows here:
Absolute Numerical Response (ANR) This number is always displayed in the
upper left corner of the displayregardless of the mode being usedIt
indicates at all times the strength of the signal being detected at the desired
frequencyBecause it is absoluteit always reflects the actual signal strength
Sothe ANR is always a good indicator of the working signal levelAn ANR
of “” and above is considered a strong working signal; an ANR between
“” and “” is fair; an ANR below “” is weakeven though it may
still be usable
Depth Report When the locating target becomes centered under the
crosshairthe estimated depth will appear automatically and remain as long
as the target remains centered
Depth Accuracy Report This is the receiver’s estimate of how accurate it
deems the calculated depth reportIn generalthe closer the depth accuracy
number is to “”the more accurate the receiver’s programming deems
the depth report to beHoweverthe user should be cautious when using
this indicatorbecause it is a “fuzzy” estimateAlsoit is always
recommended that depth estimates be verified by some other meansif
possible(One way of verifying depth is by triangulationThis and other
techniques for ascertaining depth accurately are discussed in Appendix A of
this manual) In practiceit has been found that the depth accuracy report
tends to be “worst case”; that isthe depth report will often be more accurate
than the depth accuracy number seems to indicate
Frequency/Mode Indicator The current frequency and locating mode being
used alternately flashes in the lower left corner at all times


 
Crosshair Just as might be expected for a targeting or locating devicethe
horizontal and vertical crosshairs aide the user in positioning the pointer
antenna directly at the target in question
Battery Indicator This icon in the lower right corner constantly reports the
status of the “AA” batteries powering the receiverIt should be seen as a
“fuel guage”When the icon is “empty”the batteries should be replaced with
fresh ones
Control Strip Menu
The popup control strip menu (shown below) provides a quick and easy way
for the user to make any desired adjustments to the receiver’s settings at any
time during a locating job
To access the control strip while locatingsimply CLICKHOLD the trigger
CLICK to advance through the available choicesAs each icon becomes
highlighteda help text above the strip indicates the function of the icon
Once the desired choice is highlightedCLICKHOLD to select that choice
The adjustments that can be made via the control strip follow here
SET FREQUENCYSelecting this will take you directly to the “SET
FREQUENCY” menu described in the startup procedure on the
previous pages
LOCATING MODESelecting this will activate the “SET LOCATING
MODE” menu previously described
SET VOLUMEAdjust the speaker/headset audio volume via this
choice
SET CONTRASTAdjust the LCD image contrast via this choice
BACKLIGHT THRESHOLDUse this function to set the light level
at which the LCD backlight comes on
HELPAllows access to information about the  locating
receiver
When setting the volumethe LCD contrastor the backlight thresholdthe
following adjustment bar will be displayed:


 
As usualCLICK to advance to the “Å” (decrease)the “X” (exit)or the “Æ”
(increase) iconCLICKHOLD to make the adjustmentAs you continue to
hold the triggerthe adjustment bar will continue to increase or decrease
Automatic Gain Control There is no manual gain control on the Model 
ReceiverThe instrument automatically selfadjusts as required during any
locating taskproviding maximum sensitivity while searching and the
appropriate sensitivity while pinpointing[NOTE: it is important to
understand that audio volume and gain (sensitivity) are completely
unrelatedIncreasing the speaker volume has no effect on the receiver’s
ability to detect and locate a signal source]
Shut Down The receiver may be turned off at any time by CLICKing the
triggerprovided no menu is being displayed on the screenAlsothe 
will automatically turn itself off after  minutes with no significant activity
Reminder
: During normal locating operationthe trigger has two
functions
CC
CCLL LLII IICC CCKK KK will turn off the receiver
CC
CCLL LLII IICC CCKK KK HH HHOO OOLL LLDD DD will call up the control strip menu