McLaughlin GX2 Operation Manual

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1. Safety

2. Introduction

3. Composition

3-1. Main equipment & standard accessories

3-2. Optional equipment

4. Specification

5. Description of parts & basic operation

5-1. Transmitter

5-2. Receiver

6. Warning Message

7. Operation of Transmitter (TX)

7-1. Direct connection mode

7-2. External coil mode

7-3. Indirect (Inductive) mode

8. Operation of Receiver (RX)

8-1. Peak & Null mode

8-2. Null mode

8-3. Peak mode

8-4. Depth measurement (High precision)

8-5. Logging data

8-6. Current index (Current measurement)

8-7. Passive mode

8-8. Probe for non-metallic pipe

Precautions and applications

(At the locating site)

Table of Contents

- 1 -

Always locate with proper respect and caution. Equipment misuse or carelessness can result in serious injury or damage to property. Always follow safety rules.

HAZARD ALERT INFORMATION

BE AWARE OF SAFETY INFORMATION

This is a safety-alert sign. This is placed in the manual and on your equipment to alert you to the potential for bodily injury or death.

SIGNAL WORDS

The safety-alert icon is used with the following signal word :

DANGER, WARNING, AND CAUTION. When you see these

words in the manual or on decals on your equipment, carefully read

and follow all instructions. Watch for these words and learn their

meanings.

DANGER – Imminent hazards which, if not avoided, will result in

death or serious injury.

WARNING – Potentially hazardous situation which, if not avoided,

could result in death or serious injury.

CAUTION – Potentially hazardous situation which, if not avoided,

may result in minor personal injury or property damage.

OPERATOR PREPARATIONS

Important : Read and understand this manual before using the Verifier/Vison GX Locator. Successful use of the Verifier/Vison GX Locator depends on good locating skills and correct understanding of receiver response.

GENERAL SAFETY

DANGER : Do not attempt to connect to Live Power without proper protective Equipment

and Training.

DAGER ELECTRIC SHOCK : Death or serious injury will result NOTICE : Do not apply more than 250 volts across clips. More than 250 volts will damage transmitter.

1. SAFETY

DANGER

WARNING

CAUTION

- 2 -

DANGER : High Voltage. Cutting high voltage cable can cause DEATH or ELECTROCUTION. Expose lines by a non-destructive means before excavating.

DANGER : Traffic Hazards can result in death or serious injury. Avoid moving Vehicles. Wear high-visibility clothing.

WARNING : Buried lines. Always confirm your depth estimate by exposing target line by a non-destructive means.

WARNING : Jobsite Hazards can cause DEATH or SERIOUS INJURY. Wear proper safety equipment.

NOTICE : Non-metallic lines can be accurately detected only by using a probe. Remember this before searching and attempting any excavation activity.

NOTICE : Use only alkaline batteries in the Verifier/Vison GX receiver and transmitter. Batteries contain acid, which may leak if the batteries are allowed to remain in The equipment when low or completely discharged. This acid can cause Equipment damage.

- 3 -

This equipment is the high performance digital measurement equipment to measure the location and the depth of buried cable / metal pipe from the ground. By adopting the most recent microcomputer technology, the digital correction of the measurement data realizes stable and high precious measurement.

- Principle measurement method -

When current flows through a buried cable/pipe, an alternating magnetic field is generated around it. Location, depth, and current value of the buried pipe can be measured using the Receiver at the surface of the ground.

- Feature -

· Adopting the differential coil method allows the Receiver to receive the signal from directly below the Receiver by reducing noise from surrounding area.

· Three kinds of the location measurement mode (having error detection protection function)

*Peak & Null mode: The method to detect maximum and minimum sensitivity simultaneously.

*Peak mode: The method to detect maximum sensitivity.

*Null mode: The method to detect minimum sensitivity point being indicated with arrow.

User operation is not needed.

Yaw angle, Depth of buried pipe and Current Measurement are continuously displayed when using all location modes.

· Two types of the depth measurement modes

*0-5m (16ft) mode: Measurement of depth with high precision is possible in indirect method, at the end of a cable, and jointing

points.

*0-10m (30ft) mode: Stable measurement is possible at deep depths, near guardrail, or fence. Do not use this mode when in

inductive mode.

· The Receiver can measure commercial frequency (50/ 60 Hz, 100 / 120 Hz) and Radio (from 9k to 33 kHz) without the use of the

Transmitter.

· The best-suited frequency is automatically selected in radio mode (9k – 33 kHz) with search function.

· The measured data is stored (maximum 400 data ) with one-touch operation.

The data can be transmitted to a PC as standard function. (PC software and PC cable are option.)

· Broadcasting of six frequencies （512Hz, 640Hz, 853Hz,9.5kHz, 38kHz, 80kHz) as needed for various buried utilities.

· A Probe as an option can be used to detect non-metallic pipe.

2. Introduction

Signal

Magnetic field

Pipe / Cable

Signal

Magnetic field

Pipe / Cable

*The model figure of the differential coil.

The differential coil method connects two coils. Signal is then compared inversely between each coil.

- 4 -

3-1. Main equipment & standard accessories

Description Q’ty Remark

Transmitter Unit 1pc Used as a signal generator.

Receiver Unit 1pc Digital locator

Accessories

38kHz External coil 1pc Used for External coil mode

Connecting cable 1pc Used for Direct connection mode

Ground rod 1pc Used for Direct connection mode

Operating manual 1pc English version

3-2. Optional equipment

Description Q’ty Remark

9.5kHz External coil 1pc Used for External coil mode.

80kHz External coil 1pc Used for External coil mode.

Sewer Probe 1pc Used for non-metallic pipe.

Standard probe for 75mm/ 3" & 100mm/ 4" pipe. Frequency: 38kHz or 512Hz

Mini probe 1pc For 25mm / 1" fiber optic duct.

For tracking non-directional drilling tools. Frequency: 38kHz , 512Hz, 850Hz

PC Interface Cable 1pc Provided as USB cable

Data viewer software 1pc Provided on the CD

Earphone 1pc Used in a noisy area.

Carrying bag 1pc

3. Composition

- 5 -

Transmitter(TX)

Output frequencies 38kHz

:38kHz

0.02% (Standard frequency)

9.5kHz

:9.5kHz

0.02%

80kHz

:78.125kHz ±0.02%

853Hz

:853.33Hz

0.02%

640Hz

:640Hz ±0.02%

512Hz

:512Hz ±0.02%

Dual

: Direct mode 9.5kHz &38kHz

0.02%

: Inductive mode (1) 38kHz &80kHz

0.02%

: Inductive mode (2) 9.5kHz &80kHz ±0.02% Output power 7 watts maximum / 80kHz: 1 watts maximum Operating Modes Direct connection mode, Inductive mode External coil mode (optional ) Battery type Ten Alkaline LR20 “D” or NiMH Battery Life

Direct mode : 50 hours (Output 4mA , 20

C / 68°F) Inductive mode : 20 hours (Output 50% , 20°C / 68°F) Full Power(5W) : 10 hours (20°C / 68°F)

Battery Status Low battery indication & Press key readout Visual Indication LCD : Bar graph & Digital number, includes Backlight Audio Indication Internal Speaker : Alarm, Beeping sounds Measuring function Output Current : 0 to 400mA Line Voltage : AC 0 to 250V

: DC -100V to +100V

Resistance : 0 to 10M ohms Output protection AC 250V ( 512Hz/640Hz: Output is cut off automatically) Operating Temperature

-20°C to 50°C / -4°F to 122°F

Dimensions

400 ´ 230 ´ 98mm(15.7” ´ 9.1” ´ 3.9”)

Weight 4.2kg/ 9.3lbs approx. including ten batteries

4. Specification

- 6 -

Receiver (RX)

Active Frequencies 38 kHz

: 38 kHz

9.5 kHz

: 9.5 kHz

80 kHz

: 80 kHz ±2%

512Hz

: 512 Hz

2% LF : Low frequency(200Hz to 1000Hz) --- factory configurable Passive Radio RAD : 9 k to 33 kHz (80 bands) Passive Power POW : 45~65 Hz 120 Hz : 95~125 Hz Battery type Six Alkaline LR6 “AA” Battery Life

18 hours (20

C / 68°F) Battery Status Continuous indication Power save function Automatically power off after 5minutes of inactivity Visual Indication LCD : Bar graph , Digital number & character, include Backlight Depth Display Range High precision depth measurement

Line: 0 to 5 m /16 ft. ( 0-5 m / 0-16 ft. mode)

0 to 10 m /30 ft. (0-10 m / 0-30 ft. mode)

Probe : 0 to 10 m /30 ft. Real time depth measurement 0 to 9.9 m / 33ft.

Depth Readout Unit Meter / Feet & Inch Depth Accuracy*1

2.0m / 6.5ft. :

2.5%

3.0m / 10ft. : ±5%

5.0m / 16.5ft. : ±10%

Current value Current value flowing on the conductor is displayed for line identity in

milliamps.

Audio output Internal Speaker with sound volume adjusting function, Earphone

(optional)

Data logging Memorized 400 points of the depth/ the current measurement/ the date and

time data.

Interface 6-pin output connector Operating Temperature

-20°C to 50°C / -4°F to 122°F

Dimensions 660 x 130 x 270 mm (26.0" x 5.1" x 10.6") Weight 2.1 kg/ 4.7 lbs. approx. including six batteries

Note: *1 Locators are tested in test field conditions with no adjacent signals. Always excavate the line with non-destructive means before digging.

*2 Optional cable is necessary to read the logging data.

- 7 -

5-1. Transmitter

1) LCD window

2) Key function

Power

Power ON / OFF

*Each time Transmitter is turned on the batteries are automatically checked.

Adjust

Press ADJUST key after hook up to automatically adjust power.

Selects operating frequency.

*1 DUAL : Broadcasts two frequencies simultaneously. *2 512Hz , 640Hz , 850Hz : Direct mode only.

Measurement the AC voltage, DC voltage,

sistance

or output signal

current when Direct connection mode.

Increase Output power

Reduce Output power

5. Description of parts & basic operation

LCD Window

Battery compartment

Touch pad

12-pin connector

Bar-graph (Output power)

Backlight On / Off

Sou

nd On / Off

Frequency

Battery indication

9.5kHz

80kHz

DUAL

38kHz

DC input

Output Power,/

Meas

urement value

Transmitting mode

Measure

Frequency

AC volts

DC volts

Resistance

Signal current

* Signal isn't outputted until Adjust is pressed when Direct connection mode.

512Hz

853Hz

640Hz

- 8 -

Light On/Off set

: Press

Key.

Sound set

: Press

Key.

: Sound on.

: Transmitter sound off. Function sound on.

: Sound off.

Press and hold

for 2 seconds.

Note : The last setting is memorized after the unit is Turned OFF

3) 12-pin connector

The Direct connection cord or the External coil cord are plugged into the 12-pin connector.

4) Battery compartment

Replace all batteries when there is a low battery condition. Use ten 1.5V alkaline type D (LR20 / 13A) batteries.

Transmitter sound:

ALWAYS CHECK THE BATTERY POLARITY BEFORE

CLOSING THE COMPARTMENT

Beep…(15sec.)…..Beep…(15sec)…Beep

Light On

Light Off

Mode

Battery 0％

Battery 100％

Unfasten the two hooks.

12-pin connector

DC input

- 9 -

5-2. Receiver

1)Key function

Power ON / OFF

*Power save function: Automatically powers off after 5~30 minutes of inactivity.

Adjusts s

ignal sensitivity for PEAK MODE.

epth

measuremen

t (High precision)

: Press DEPTH key at the peak value spot.

Battery compartment

Earphone plug

PC interface connector

Sensor connector

(Signal input terminal)

Frequency

Receiving sensitivity

DEPTH

Bar-graph

Battery indication

POWER

Measuring Mode

GAIN

LOG

MODE

PEAK/NULL

FREQUENCY

Gain setting value

Depth

Current index: Details page 26

Note: Current index is not displayed if probe is used.

Note: 100% is not the maximum peak value. When 100% appears, press Gain key again

until a new sharp peak value is obtained, that is not 100%.

When pressing the Gain key, sensitivity is adjusted automatically to 70%.

* Semi-Automatic gain control mode (AUTO GAIN)

POWER

GAIN

DEPTH

NULL

PEAK

PEAK & NULL MODE: Maximum sensitivity is the point directly above the object line and the buried object line location is indicated with arrow.

PEAK MODE: Maximum sensitivity is the point directly above the object line. NULL MODE: Minimum sensitivity is the point directly above the object line. The buried object line location

is indicated with

arrow.

Selects locating mode:

PEAK/NULL

LOG

* Manual gain control mode (MANU GAIN)

Press the ▼Gain key, sensitivity is decreased.

Press the ▲Log key, sensitivity is increased.

PEAK & NULL

Real time depth

- 10 -

Various settings

1. Selects backlight options. By pressing Mode , continue on.

2. Selects sound options. By pressing Mode , continue on.

3. Selects Depth function. By pressing Mode , continue on.

4. Selects Gain control operation. By pressing Mode , continue on.

5. Selects PROBE detection. By pressing Mode , continue on.

When Sewer or Mini Probe is employed for the detection of Non-metallic pipe or Boring device, 38kHz, 512Hz and 850Hz are used for Probe.

6. Select real time depth and current displaying in Peak-mode. By pressing Mode , return to measurement.

*The last setting is saved except Depth and PROBE function.

Press ▼Gain : Select speaker sound On / Off.

Press ▼Gain : Select depth function 0-5m / 0-10m ( 0-16ft / 0-30ft.).

Press ▼Gain : Select detecting

MODE

FREQUENCY

Selects operating frequency.

CAUTION

When applying Inductive mode, select 0-5m /16ft . Depth measurement

error increases near the Transmitter when 0-10m/30ft is applied.

PRB On . Probe detection

PRB OFF . Cable / Pipe detection

Press ▼Gain : Select backlight On / Off.

SPK OFF

SPK On - 1 (Small)

SPK On - 2 (Large)

LITE On LITE OFF

120Hz

80kHz

38kHz

9.5kHz

512Hz

RAD

POW

*0-5m / 16ft : Applied for Inductive mode.

Detecting near t he end of the pipe.

Depth measurement range 0 to 5m(16ft).

*0-10m / 30ft : Applied for the depths deeper than

5m(16ft.) , near guardrail or metal fence.

The measurement range of depth 0 to 10m(30ft).

(See page 9)

Press ▼Gain : Select Gain control operation

MANU

AUTO

LF *

“No icon”

Press ▼Gain : Select ON/OFF.

D / CU On :

D / CU OFF

GAIN

Real time Depth and Current are displayed.

*When

location

ode is

ull or

peak &

null

, real time depth and current are

always displayed regardless of this setting.

* LF : Low frequency (200~1000Hz). Factory configurable

- 11 -

Setting the Time and Date

a)Power on while holding Mode , wait for clock display appears.

The year will flash.

Press ▼Gain to advance the year or ▲Log to decrease the year.

b) Press Mode , the month will flash.

Press ▼Gain to advance the month or ▲Log to decrease the month.

c)Do same as above to set Day - -> Hour - - > Minute.

When measurement starts, setting is completed.

2) Battery compartment

Replace all batteries when there is a low battery condition.

Use six 1.5V alkaline type AA (IEC LR6/NEDA15A).

3) PC interface connector

4) Earphone plug

Earphone can be used in a noisy area.

Supplied as an option.

5) Sensor connector (Signal input terminal)

Used with Sensor Coil to find wiring

systems in a building or overhead telephone cables.

Sensor coil is supplied as options.

6) Digital level

Displayed the inclination of the receiver.

MODE

Battery 0％

Battery 100％

Open

ALWAYS CHECK THE BATTERY POLARITY

BEFORE CLOSING THE COMPARTMENT

Battery holder

The connector is used to communicate PC and GPS. *Interface cable & GPS are supplied as option.

Earphone plug

Sensor connector

PC interface connector

Calibration methodology of digital level

a) Power on while holding Depth key.

PUSH GAIN is indicated in 1 seconds.

b) Hold the receiver vertical position. (center of left chart)

c) Press ▼GAIN . Please do not move the receiver until OK is

displayed.

d) Press ▼GAIN again. Incline the receiver to the front, back,

left and right, and confirm the display.

The setting is memorized with Power off.

- 12 -

*Messages during your search procedure :

Receiving signal is too high.

a) Indirect mode : Transmitter and Receiver are too close each other. b) Other options: Reduce output of the Transmitter.

Receiving signal is too weak or not present.

a) In the case of direct, induction or coil

- Increase output of the Transmitter.

- Check batteries, connecting parts and frequency of the Transmitter.

- Check signal loop at the Transmitter.

b) In the case of Radio / Power mode

- There are no conductors to radiate magnetic fields. There is no pipe or cable

- There is a conductor, but the signal is too low to adhere to the line. Use Transmitter to search for the line.

*Messages on location :

Press GAIN key. Þ Normally this is your object line.

Reduces or increases signal strength.

*Messages on Depth measurement :

a) Received signal level is unstable, or received signal is too weak. b) Located point is not directly above the object line. c) Metallic fences, metallic structures or cars are interfering with the depth measurement. Find area with less interference. d) The Line is disconnected.

Indicating that the depth measured is deeper than 5 m / 16 ft.

In Line detection (0-5m / 0-16ft.) mode, locator cannot read below this depth

*Messages on transmitting operation:

Inside temperature exceeded an upper limit.

Þ Power off and move the transmitter to the cool place.

Power electric current exceeded an upper limit. Inside temperature exceeded an upper limit.

Þ Leave the transmitter from the neighborhood of the metal. Decrease transmitting output.

6. Warning Message

OVER

LOW

PUSH GAIN

ERR

16. --ft/in.

5. --m

HEAT!

LIMIT

- 13 -

Mode of Detection

Purpose of usage

This is the best way to inject AC current directly to the target line. Signal (AC current) will return to the Transmitter through the ground.

Effective for detecting the target line in congested areas.

Advantage for live power or cable, that is not accessible for Direct connection. The clamp is waterproof and will attach on any size cable or conduit.. No need for a ground stake. Effective for detecting the target line in congested area. The target line must be grounded.

If there is no direct access to the target line, use this method. The Transmitter can induce its signal to the buried line. Place the Transmitter in an upright position and at right angle to the buried line.

Minimum TX to RX distance Þ30 ft. / 10 m

Note: When using the indirect mode, set the depth mode of the receiver

to 0-5m (0-16ft.) .Depth measurement error increases near the Transmitter when 0-10m (30ft) is applied.

Used with External Coil to find wiring systems in the building.

TX's circuit is protected* up to 250V at 50 / 60 Hz.

*If using the low frequency (512Hz, 850Hz…), output is cut

off automatically for protecting the unit.

Used for tracing small diameter drains or plastic pipes. Also, pinpoint a drain blockage or collapse. Can trace nondirectional boring tools. The Probe is available in two 20mm/ 0.79" and 50mm / 2" diameter.

Direct Connection Mode

Building Wiring

Probe Mode

Indirect (Inductive) Mode

7. Operation of Transmitter (TX)

Signal

Black clip

Transmitter

Red clip

Target line

Ground stake

Ground

Signal

External Coil Mode

Signal

- 14 -

7-1. Direct connection mode

A specific route can be detected in Direct Connection mode. Use two connecting cables provided in the carrying case as one of the standard accessories.

When the clips are connected to the transmitter, Direct Connection mode automatically selected.

Frequency setting

Connect the cable clips to the target line and ground stake.

Press FREQUENCY key

Transmitter

Note:

Place the Earth/Ground as far as possible and at right angle to the object line.

Keep Receiver at least 5m/16ft. away from the signal connection point as illustrated

Receiver

Press Frequency key

Black clip

Ground stake

Red clip

Metal pipe

Note: Clean

connection area if rusted or painted to

ensure a good electrical connection.

Check the grounded point. Find the best place to ground to have a GOOD SIGNAL LOOP indication.

*Set a receiving frequency on the Receiver the same as

the transmitter.

90°

5m/16ft or more away

Display of the Direct mode

This groove is facing up.

- 15 -

heck the Voltage

and Resistance

of the cable/pipe before adjust output power.

Adjust output power

When output is adjusted

*When the Receiver indicates “ OVER” , Press

key. Þ Reduce output.

*W hen locating a long-distance line or deeper depth than 3m, Press

key. Þ Increase output.

ELECTRIC SHOCK

Death or serious injury will result. 250 Volts

maximum across clips. Use protective equipment.

DANGER

AC volts

DC volts

Resistance

Press Measure key.

When voltage is greater than 25 volts, Alarm sounds.

Note: 512Hz / 640Hz output is cut off automatically.

Telephone line, Gas pipe

Power line

Press Adjust key.

Automatically adjust power

Current value and “Good signal loop” are indicated.

*When “GOOD SIGNAL LOOP” isn't indicated after pressing ADJUST. Þ Clean off the connected part if

rusted or painted or move ground stake.

P P P P ….

When signal loop is acceptable, Beeping sound is emitted.

*Transmitter will beep for 30 seconds.

*Sound stops when Pressing ADJUST key.

*Sound setting is [b-0].ÞBeeping sound off.

Note: When frequency is changed, adjust output power again.

- 16 -

Direct Connection mode

Use the Receiver 5m / 16ft. away from the

transmitter and clips.

Applications (1)

Applications (2)

If the dead cable is the object, connect the red alligator clip of the connecting cable to either the aluminum-sheath or a bundle of the copper cores directly.

5m / 16ft. away

Telephone cable:

Disconnect Telephone Ground lead and connect the Red clip to it to locate Telephone line.

CATV cable:

Disconnect CATV's ground lead and connect the Red clip to it to locate CATV line.

Telephone cable

CATV cable

Remember to correctly reconnect common grounds for telephone & CATV. Check Local codes for proper grounding procedure. IMPROPER GROUNDING MAY CAUSE

DAMAGE TO APPLIANCES, FIRE OR EXPLOSIONS.

WARN

ING

The ground should be provide

the end of the line

Short distance dead cable

Long distance dead cable

No need of ground at the ending point

Common ground lead

Power cable

House meter

Power cable:

Disconnect other utilities that maybe connected to the common ground lead and connect the Red clip to Power line ground lead. Then locate Power line.

WARNING

Do not disconnect power line

- 17 -

7-2. External coil mode

Use 9.5 kHz, 38 kHz or 80kHz External coil supplied as an option. Use this mode if object is accessible. An induced current, generated by the coil in the External Coil attachment, is applied directly to the exposed part of the cable / pipe to be located.

Applicable to : Live Telecom cable or Live Power cable. Fiber optic cable having an aluminum-sheath.

When the External coil is connected to the transmitter, E

xternal coil mode is automatically selected.

Frequency setting

Adjust output power

Connect the External coil to the target line.

Note :Make sure it is attached parallel and in line with the cable as illustrated.

When 38kHz coil is connected

Transmitting coil

*The jaws do not have to be closed around the cable.

(This coil method is different from the conventional clamp

that must have jaws perfectly closed. Different size clamps

are not needed. This coil method uses Indirect / Inductive

principle.)

Electromagnetic field

Telecom / Power cable (Diameter up to 10cm / 4”)

Frequency is selected based on coil used with the External coil automatically.

*Set a receiving frequency on the Receiver the same

as the transmitter.

Press Frequency key

External Coil mode indication

Indicate output power with the bar graph and the numerical value when pressing / key.

Reduce output

power

increase output

power

This groove is upward.

- 18 -

External coil mode

Make sure that the cable is grounded at both ends.

Do not put the coil close to or around the ending or middle ground.

* If the cable is submerged in water, you can use the coil attachment in the water. The coil attachment is WATERPROOF.

Note : Do not attach to the metal pipe or metal riser above the ground.

Attach the coil clamp to the cable/PVC part.

Note :

Use the Receiver more than 5 m/16 ft away from the coil clamp

when starting the location work.

Unmeasurable

5m / 16 ft. away

Intermediate ground

Metal Pipe

PVC Pipe

Cable

Note : Fresh water has no effect Locating the cable or detecting depth.

Brackish or salt water will effect locating.

Signal to ground

will not trace.

- 19 -

7-3. Indirect (Inductive) mode

If there is not direct access to the object line, the Transmitter can apply AC current ( signal ) to the line directly below the Transmitter.

Note: When using the indirect mode, set the depth mode of the receiver to 0-5m (0-16ft.) .

When nothing is connected to the transmitter, Indirect mode automatically selected.

Frequency setting

Place the transmitter over or near the area to be located.

*Place the Transmitter in an upright position at a 90° angle to the object line as illustrated.

*Location the area of a manhole, place the Transmitter on the side of the manhole you wish to locate.

Indirect mode indication

Power on

Electromagnetic

field

Press Frequency key

Transmitter

*Set a receiving frequency on the Receiver the

same as the transmitter.

Press Frequency key

38kHz

9.5kHz

80kHz

DUAL1

80kHz 38kHz

DUAL2

80kHz

9.5kHz

Transmitter

signal

manhole

Do not place the Transmitter on a

manhole cover or other steel covering.

Object line

Top view

- 20 -

Indirect mode

Adjust output power

*Standard of adjustment.

- When depth is less than 0.6m / 2ft. Þ 50%

- When depth is more than 0.6m / 2ft., less than 1.5m / 5ft.Þ 75%

- When depth is more than 1.5m / 5ft.Þ 100%

Note :

Use Receiver

more than

10m. away from Transmitter

when starting the location work or an "Air Coupling" between the Transmitter and Receiver can exist.

Note: Detection of the Multiple Telephone Cable Pipes (Metal Ducts) in Indirect mode

Don't assume that the peak point of the signal strength obtained is the center of the multiple lines. It is the central point of the electromagnetic field applied by the Transmitter.

Receiving

sensitivity

Indicate output power with the bar graph and the numerical value when pressing / key.

Reduce power

Increase power

Note: If output is adjusted to 100%, you can usually locate in any area. But the battery of the transmitter is reduced as output increases.

More than 10 m / 30ft. away

- 21 -

Tutorial

Basic of the measurement.

Move the Receiver from side to side to determine

the exact position.

Hold

the Receiver perpendicular to t

he ground.

Use the DIGITAL LEVEL.

Measurement Mode

PEAK & NULL

MODE

PEAK MODE NULL MODE

Functional

Description

Icon

Bar Graph PEAK PEAK NULL

Display the graph

detecting right above the cable

Sensitivity

Indication

0 – 100% 0 – 100% 0 – 9999

Indicate the receiver sensitivity

Left and Right

direction

display

YES NO YES

Display the direction

by left and right allow

YAW angle

display

YES YES YES

Display the YAW angle

Continuous

Depth

measurement

YES

*See page 10

YES

Display the real time depth of the cable

Continuous

Current

measurement

YES

*See page 10

YES

Display the current

value of transmitting signal

Purpose Various uses

Simple

operation

Route s

earching

Using around the metal objects

*Use the Depth Key when measuring the depth of the buried pipe more accurately

8. Operation of Receiver (RX)

Pinpoint the position.

Do not swing like this.

- 22 -

8-1. Peak & Null mode

Starting Peak & Null Mode

To find the direction of the object line,

using the

Yaw Angle Display.

adjust the sensitivity of the receiving level.

A) Manual gain control mode

B) Semi-automatic gain control mode

Press the Gain/Select key, sensitivity is decreased.

Press the Gain / Log key, sensitivity is increased.

Select peak & null

Direction of the object line

PEAK & NULL

Receiving level

Gain setting value

Digital level

Yaw Angle

Real time depth

Direction of the buried cable.

30%

- - -

70%

- - -

Buried Line

30%

OUT OF RANGE

Percentage of the receiving

level is not indicated.

Move to the direction allow

Maximum (peak) value, the precise position and direction, are obtained when the

eceiver blade is located on the top of the object line

100% 100%

30%

When 100% appears…

70% appears as an initial receiving level.

Press Gain key.

Note: 100% is not the maximum peak value.

70%

50%

When PUSH GAIN appears…

OUT OF RANGE

Percentage of the receiving

level is not indicated.

Press PEAK / NULL key.

To find the position of the object line

Gain setting value

0: minimum sensibility

99: maximum sensibility

Yaw Angle

Operational frequency or

Real time current index

Distance is

approximately same as depth

Distance is

approximately same as depth

- 23 -

8-2. Null mode

Start

ing Null Mode

To find

the direction of the object line,

using

the Yaw Angle Display

8-3. Peak mode

Start

ing Peak Mode

Method of this

Mode

Peak mode is almost same as Peak & Null mode.

The difference is that there are no Null functions. See the

Peak & Null Mode Page 22.

*Real time depth and current are displayed when “D /CU”

setting is on. See page 10.

150

30 550

PE!

Move in the direction of the arrow.

100

Buried cable

OUT OF RANGE

Number of receiving level

is blinked.

340

300

TOP of the object line

The arrows are indicated on the both side.

Beep sound is emitted.

Real time depth or current index is

displayed on the bottom line.

The direction of the object line.

Null mode

Receiving level

Digital level

Gain setting value

Yaw angle

Real time depth

Direction of the buried cable.

Yaw angle

Select null

Press PEAK / NULL key.

To find the position of the object line

Bar-graph

(Sensibility and L/R direction)

Select peak

Press PEAK / NULL key.

Operational frequency or

Real time Current index

Distance is approximately same as depth

- 24 -

8-4. Depth measurement (High precision)

Once the precise location of the object line has been determined, the Depth key is pressed to display the distance from the Receiver's blade to the object line. Calculations are indicated on the digital display.

Note: Depth reading is a calculation of received signal strength.

Depth

Current index

Start locating

Signal is to

o low / too high.

Deeper than 5m / 16ft.

Press Depth key.

Press Gain key.

ERR appears…. *Receiving signal is not strong enough.

- Possibly this is the wrong line.

- Move the Receiver again from side to side to find the exact position. *Gas pipe Þ if not well jointed

- injected signal does not travel well

- receiving signal is too low

*Warning message

*Normal calculation

Data Logging

Press Log key.

Data

number

Memorized Depth, Current index, Date, time and frequency.

Indicate depth mode

Depth

Center

Blade

90°

Axis

If t

he ground slopes, keep

the Receiver at right

angles to the axis of the

globe.

Hold the Receiver vertically, place the blade on the ground and do not move it during

the depth measurement.

Touch the ground with the Receiver's blade at an upright position.

Object line

Check the vertical condition of the locator by Digital level indicator.

How to select unit of the depth measurement

1) Power on while holding PEAK/NULL key. DEP METE or DEP FEET screen is indicated in 3 seconds.

2) Press PEAK/NULL , and select METE (meter) or FEET (feet) .

3) The setting is memorized when Powered off.

Note: When

setting is

“

MANU GAIN”

(see page 9), to 5 seconds after depth value is displayed, the screen will return to the position locating automatically.

- 25 -

8-5. Logging Data

Indicate the Logging data

The data recorded at

the end is indicated.

Depth Data

Data number

1) Press Mode key.

2) Press and hold LOG .

for one second.

3) Press - Increase data number. Press - Decrease data number

Backlight setting screen

appears.

4) Two seconds after data is displayed., its stored date and hour is displayed automatically in order.

Delete Logging data

Press and hold Frequency .

key for two seconds..

Takes several seconds to

delete data.

CAUTION: If delete operation is done, all data is gone.

Return to locator function

Press Mode key.

Return to locator function

Press Mode key.

Download data to the PC

Refer Data viewer software manual about

operation of data communication with a PC.

Data communication screen appears.

* PC interface cable is option.

*Connect the PC interface cable

to the 6

pin connector.

Connecting mark

- 26 -

8-6. Current index (Current measurement)

Each time a Depth calculation is taken, a Current Index simultaneously appears on the display.

What

’

s the Current index?

*The Current gradually reduces as the distance from the Transmitter increases.

When

current sudden

ly drops

…

ERR : The line is disconnected.

Or, the current does not travel after the joint of the gas line / water line due to non-conductivity.

The Current value is not affected by the depth

Depth : 1.90m

Current Index :2.0mA

Depth : 1.75m

Current Index :1.5mA

Depth : 2.00m

Current Index :1.0mA

1.80m

0.7mA

*Normal tracing ® Current value progress down.

Current Value =2.0mA

Current Value =1.5mA

Current Value =1.0mA

0.7mA

1.00m / 2.0mA

1.00m / 0.5mA

ＥＲＲ

30cm

1.00m / 200

1.30m / 200

The current value is not affected by the depth,

but it is affected by the detection methods, the

frequencies and power level.

Leak/ Fault

Disconnect

1.00m / 0.1mA

The current leaks to a ground.

- 27 -

The Current index helps to confirm the line's identity.

If an adjacent line is running parallel with the object line.

If two lines are crossing:

Locating T connection

Þ Splicing/jointing points of Power cable, Telephone cable, Gas pipe, Water pipe, or Sewer pipe.

0.5m

Depth: 1.50 m

Current index: 2.6

Line: A

Line: B

1.5m

0.5m

Line: A

Line: B

Line-A with a 2.6 mA current index is the object line. Even though signal is smaller.

The line with the highest current index is the object line into which the signal is being broadcast.

ÞLine A with a 2.0 mA current index is the trace object.

Depth: 1.50 m

Current index

: 1.5 mA

Depth: 1.50 m

Current index:

0.5 mA

Depth: 1.00 m

Current index: 1.0 mA

Depth: 0.50 m

Current index:

0.7 mA

Main line-A with a 1.5 mA current index

Line-B: Index value 1.0 mA Þ Main line

Line-C: Index value 0.5 mA Þ Branch line

Depth: 1.50m

Current index:

2.0 mA

Depth: 0.50m

Current index:

1.0 mA

1.5m

Line: A

Line: B

Receiving

sensitivity

- 28 -

8-7. PASSIVE MODE

The Power and Radio passive modes of the Receiver are used to search an area for unknown power cables and other utility lines, without using the Transmitter.

When applying Radio wave (RAD) detection, the most sensitive frequency is selected with auto search function.

Search all frequencies

Set frequency to RAD , Press and hold Gain for one second. And then, search starts.

Search frequencies in several bands

Press Gain during search, Search stops. Resume search, the search starts from the halted frequency.

Above mentioned example shows the first search detects the most sensitive frequency from 9.1k to 17kHz. And then search is

halted. Then, search resumes. The second search detects the most sensitivity frequency from 17k to 32.8kHz

Applying this function, several different kind of cables can be detected in several stages.

Radio mode

It locates buried utility lines as they reradiate very low freque

ncy,

Power mode: Power mode detects 50/60 Hz or 100/120Hz frequency radiated by the live power cable.

50Hz / 60Hz : select POW .

100Hz / 120Hz : select 120Hz .

Select RAD .

Attention: Radio can only be selected when the peak mode or peak & null mode.

Press Frequency key.

Frequency setting

Frequency

9.1 kHz

Frequency

17.0 kHz

Frequency

17.0 kHz Frequency

32.8 kHz

Frequency

9.1 kHz

Search start

Search end.

Press Gain key.

Auto search function of Magnetic field in environment （Radio wave）

Search starts

Search stops

Resume search

Search stops

Search starts

Automatically selected the most sensitive frequency

- 29 -

Depth measurement Press DEPTH key after pinpointing the location.

Decide the place of the starting point. Press Gain , locate that circumference.

manhole

Streetlight

Power /

telephone

Trace a line from the starting point to have sensitivity.

Accuracy of the depth measurement using the passive modes is unreliable. Always expose the utility lines by exposing in a nondestructive manner before excavation.

WARNING

Press Depth key.

When street light is

lighting, 50 / 60Hz is

available.

Place the Receiver

close to the cable riser.

RAD auto search is

effective.

- 30 -

8-8. Probe for non-metallic pipe

A Probe, supplied as optional equipment, is a small waterproof transmitter emitting a signal that is traced by the Receiver.

The Probe can only be used in the non-metallic pipe.

Note : The metal pipe conceals a signal so that the Receiver cannot detect the signal. Use Direct connection mode.

Battery check

a) Set the rotary select switch to BATT. b) Check if the green lamp is ON. c) If the lamp is OFF, replace all batteries with new ones.

Repla

cement of batteries

a) Unscrew the top cover and open the battery compartment. b) Four 1.5V AA (LR-6, NEDA15A) batteries are placed in series. c) The proper polarities for the batteries are shown on the battery holder.

Output setting

a) OUTPUT LOW: 0.7 ft to 5.8 ft ( 0.2 m to 1.8 m ) Þ less than 4ft / 1 m b) OUTPUT HIGH: 5.9 ft to 16 ft ( 1.8 m to 5 m )Þ more than 4 ft / 1 m

Mini

Probe

Small probe for 1" Fiber optic duct or non-directional boring tools

Lamp

Attach the Sewer probe to the rodding tool and insert the probe into the pipe.

(+) (

Replacement of batteries

Attach the Mini-probe to the rodding tool

M10(mm) thread

*Mini-probe doesn't have battery check function.

Check the transmission of the probe on the ground

before locating.

PT3/8” (Pitch 3/8”)

Attach the Sewer probe to the Pulling eye with the pulling wire and pull the probe with the wire.

Attach the Mini-probe to the Pulling eye

- 31 -

Receiver Þ Press Frequency key to set the same frequency of the probe.

Set the detection mode to Probe mode.

Depth measurement Þ Press DEPTH key

Tracing a non-metallic drain or plastic pipe with the Probe.

Ex. Feed the Probe into the PVC pipe and locate

the blockage or collapse

Press Mode key

“PRB OFF”

Pipe & Cable mode

“PRB ON “

Probe mode

Press Gain key

Apply Peak mode. Horizontal direction

can not be detected with Null mode.

Use the Receiver parallel to the object line

like the drawing

Location measurement ( horizontal direction of the line)

Peak mode.

Three sensitivity peaks appear. The largest peak is the point directly above the Probe.

Location measurement (Same direction in the line)

Null mode

When n

ear the Probe, arrow indicates

the location above the Probe.

When a

way from the Probe, the receiving level flashes and the arrow indicates opposite direction.

* For the Sewer probe :

OVER Þ Change the output to OUTPUT LOW. LOW Þ Change the output to OUTPUT HIGH.

* For the Mini- probe :

OVER Þ Receiver is too close to probe. LOW Þ Receiver is too far away from probe.

* If tracking a boring tool, Probe should be housed in a metal housing with slots milled in housing to

allow

signal to escape. Location is done as above.

Depth

Current index is not displayed.

“No icon”

LITE

PRB SPK

DEP

GAIN

- 32 -

1) Locating Work Near the Guardrail (In Indirect mode)

2) Metal Fences or Other Metallic Structures

Locating with the Receiver next to the guardrail will give an incorrect reading.

Locate just between the breaks of the

guardrails.

9. Precautions and applications (At the locating site)

Keep more than

1m/3.4ft away

Keep more than

2m/7ft away

Metal fence

Footbridge

Object line

- 33 -

3) Street Light, Traffic-Control Sign

4) Power-Transmission Tower

5)Telephone / Electric Power Poles

There is no interference

from Power lines above.

Keep more than 10m / 30ft away

Keep more than

1m / 3.4ft away

Keep more than

1m / 3.4ft away

Keep more than

1m / 3.4ft away

The transmitter can be

placed next to the pole.

- 34 -

6) Heavy Traffic Flow

7) Railroads

Keep the receiver more

than 2m/7ft away

OK !

Stop locating when a train is approaching

OK !

Locate when traffic has passed.

Stop!

Keep the receiver more

than 2m/7ft away

Within 1m / 3.4ft

TAKACHIHO SANGYO CO., LTD.

Tokyo office

19-6, 5-Chome, Shiba, Minato-Ku, Tokyo 108-0014 TEL 81-3-3453-4778

Head office & Factory in Nagoya, Japan

Call & Contact

2016.4 832-080

McLaughlin GX2 Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual