Ridgid SR-24, SR-20 User Manual

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Operator’s Manual

SR-24 is used to refer to both the SR-24

and the SR-20 throughout this manual. The

SR-24 has integrated GPS and Bluetooth

technology. The SR-20 does not, but is oth-

erwise functionally identical.

™

Locators

Original Instructions – English – 1

WARNING!

Read this Operator’s Man-

ual carefully before using

this tool. Failure to under-

stand and follow the con-

tents of this manual may

result in electrical shock,

fire, and/or serious per-

sonal injury.

2 – English

Table of Contents

Introduction

Regulatory Statements ��4

Safety Symbols ��4

General Safety Rules

Work Area Safety �� 5

Electrical Safety �� 5

Personal Safety ��5

Equipment Use and Care ��6

Pre-Operation Inspection

Specific Safety Information

SR‑24/SR‑20 Safety �� 7

System Overview

Description ��7

Standard Equipment �� 8

Components ��9

Operating Instructions

Quick Start �� 10

Powering the System �� 11

Receiver Operation Modes �� 11

Audio ��12

Display Elements �� 13

Understanding the Display ��17

Active Line Tracing

Direct Connect �� 19

Inductive Clamp �� 19

Induction �� 20

Induction and Air‑Coupling ��20

Tracing the Target Line ��21

Confirming Accuracy ��21

Passive Line Tracing

Passive Power ��22

Passive Radio Frequency Broadband ��22

OmniSeek ��23

Confirming Accuracy ��23

Sonde Locating

Locating the Sonde ��24

Depth

Depth Verification Test ��27

Depth Average �� 27

Improving and Confirming Accuracy

Signal Strength �� 29

Tracing Circuit ��31

Confirming Accuracy ��31

English – 3

Main Menu

Setting the Frequency �� 33

Bluetooth ��34

Connecting to a Transmitter with Bluetooth��37

Transmitter Control Screen ��38

SD Card ��40

Units of Measurement ��44

LCD Contrast �� 44

Custom Frequencies ��44

Settings

IO Menu �� 48

SR‑24 GPS ��49

Customizing Display Elements ��51

Information Options �� 54

Maintenance and Support

Cleaning ��55

Accessories �� 55

Transportation and Storage ��55

Service and Repair �� 56

Disposal ��56

Troubleshooting ��57

Appendices

Appendix A: Glossary of Terms ��58

Appendix B: Main Menu Map ��60

Appendix C: Data Logging Abbreviations ��61

4 – English

Safety Symbols

In this operator’s manual and on the product, safety sym‑

bols and signal words are used to communicate import‑

ant safety information� This section is provided to im‑

prove understanding of these signal words and symbols�

This is the safety alert symbol� It is used to alert

you to potential personal injury hazards� Obey all

safety messages that follow this symbol to avoid

possible injury or death�

DANGER

DANGER indicates a hazardous situation which, if not

avoided, will result in death or serious injury�

WARNING

WARNING indicates a hazardous situation which, if not

avoided, could result in death or serious injury�

CAUTION

CAUTION indicates a hazardous situation which, if not

avoided, could result in minor or moderate injury�

NOTICE

NOTICE indicates information that relates

to the protection of property�

This symbol means read the operator’s manual

carefully before using the equipment� The oper‑

ator’s manual contains important information on

the safe and proper operation of the equipment�

This symbol means always wear safety glasses

with side shields or goggles when handling or

using this equipment to reduce the risk of eye in‑

jury�

This symbol indicates the risk of electrical shock�

Introduction

The warnings, cautions, and instructions dis-

cussed in this operator’s manual cannot cover

all possible conditions and situations that may

occur. It must be understood by the operator

that common sense and caution are factors

which cannot be built into this product, but must

be supplied by the operator.

Regulatory Statements

The EC Declaration of Conformity (890‑011‑

320�10) will accompany this manual as a sepa‑

rate booklet when required�

This device complies with Part 15 of FCC Rules�

Operation is subject to the following two condi‑

tions: (1) this device may not cause harmful in‑

terference, and (2) this device must accept any

interference received, including interference that

may cause undesired operation�

Contains Transmitter Module FCC ID: QOQWT41�

English – 5

General Safety Rules

WARNING

Read all safety warnings and instructions. Failure to

follow the warnings and instructions may result in

electric shock, fire, and/or serious injury.

SAVE THESE INSTRUCTIONS!

Work Area Safety

• Keep your work area clean and well lit. Cluttered or

dark areas invite accidents�

• Do not operate equipment in explosive atmo-

spheres, such as in the presence of flammable liq-

uids, gases, or dust. Equipment can create sparks

which may ignite the dust or fumes�

• Keep children and bystanders away while operat-

ing equipment. Distractions can cause you to lose

control�

Electrical Safety

• Avoid body contact with earthed or grounded sur-

faces such as pipes, radiators, ranges, and refrig-

erators. There is an increased risk of electrical shock

if your body is earthed or grounded�

• Do not expose equipment to rain or wet condi-

tions. Water entering equipment will increase the risk

of electrical shock�

• Keep all electrical connections dry and off the

ground. Do not touch equipment or plugs with wet

hands to reduce the risk of electrical shock�

Personal Safety

• Stay alert, watch what you are doing, and use com-

mon sense when operating equipment. Do not use

equipment while you are tired or under the influence of

drugs, alcohol, or medication� A moment of inattention

while operating equipment may result in serious per‑

sonal injury�

• Use personal protective equipment. Always wear

eye protection� The appropriate use of protective equip‑

ment such as a dust mask, non‑skid safety shoes, a

hard hat, and hearing protection will reduce personal

injuries�

• Do not overreach. Keep proper footing and balance

at all times� This enables better control of the equip‑

ment in unexpected situations�

• Dress properly. Do not wear loose clothing or jewelry�

Loose clothes, jewelry, and long hair can be caught in

moving parts�

DANGER

• Avoid traffic. Pay close attention to moving vehicles

when using on or near roadways� Wear high‑visibility

clothing or reflector vests�

6 – English

Equipment Use and Care

• Do not force equipment. Use the correct equipment

for your application� The correct equipment will do the

job better and safer at the rate for which it is designed�

• Do not use equipment if the power switch does not

turn it on and off. Any equipment that cannot be con‑

trolled with the power switch is dangerous and must

be repaired�

• Disconnect the plug from the power source and/or

the battery pack from the equipment before mak-

ing adjustments, changing accessories, or storing.

Preventive safety measures reduce the risk of injury�

• Store idle equipment out of the reach of children

and do not allow persons unfamiliar with the equip-

ment or these instructions to operate the equip-

ment. Equipment can be dangerous in the hands of

untrained users�

• Maintain equipment. Check for misalignment or bind‑

ing of moving parts, missing parts, breakage of parts,

and any other condition that may affect the equip‑

ment’s operation� If damaged, have the equipment

repaired before use� Many accidents are caused by

poorly maintained equipment�

• Use the equipment and accessories in accordance

with these instructions; taking into account the

working conditions and the work to be performed.

Use of the equipment for operations different from

those intended can result in a hazardous situation�

• Use only accessories that are recommended by

the manufacturer for your equipment. Accessories

that may be suitable for one piece of equipment may

become hazardous when used with other equipment�

• Keep handles dry, clean, and free from oil and

grease. This allows for better control of the equipment�

Pre-Operation Inspection

WARNING

To reduce the risk of serious injury from electrical

shock or other causes, and to prevent damage to

your equipment, inspect all equipment and correct

any problems before each use.

To inspect all equipment, follow these steps:

1� Power off your equipment�

2� Disconnect and inspect all cords, cables, and con‑

nectors for damage or modification�

3� Clean any dirt, oil, or other contamination from your

equipment to ease inspection and to prevent it from

slipping from your grip during transportation or use�

4� Inspect your equipment for any broken, worn, miss‑

ing, misaligned or binding parts, or any other con‑

dition which might prevent safe, normal operation�

5� Check your work area for the following:

• Adequate lighting�

• The presence of flammable liquids, vapors, or

dust that may ignite� If present, do not work in

area until sources have been identified and cor‑

rected� The equipment is not explosion proof�

Electrical connections can cause sparks�

• A clear, level, stable, and dry place for the oper‑

ator� Do not use the equipment while standing

in water�

6� Examine the job to be done and determine the cor‑

rect equipment for the task�

7� Observe the work area and erect barriers or cones

as necessary to keep bystanders away and, if near

traffic, alert drivers�

English – 7

Specic Safety Information

WARNING

This section contains important safety information

that is specific to the SeekTech SR-24/SR-20. Read

these precautions carefully before using the SR-24/

SR-20 to reduce the risk of electrical shock, fire, or

other serious personal injury.

SAVE ALL WARNINGS AND INSTRUCTIONS

FOR FUTURE REFERENCE!

SR-24/SR-20 Safety

• Read and understand this operator’s manual and

the instructions for any other equipment in use in-

cluding, but not limited to, transmitters, clamps,

and sondes. Failure to follow all instructions and

warnings may result in property damage and/or seri‑

ous personal injury�

• Do not use this equipment if operator or SR-24/

SR-20 is standing in water. Operating the SR‑24/

SR‑20 while in water increases the risk of electrical

shock�

• Do not use where a danger of high voltage contact

is present. The SR‑24/SR020 is not designed to pro‑

vide high voltage protection and isolation�

• Exposing the utility is the only way to be certain of

its location. Several utilities may be underground in

the same area� Be sure to follow local guidelines and

One Call service procedures�

NOTICE

Ridge Tool Company, its affiliates and

suppliers, will not be liable for any injury

or any direct, indirect, incidental or con-

sequential damages sustained or in-

curred by reason of the use of the SR-24/

SR-20.

System Overview

Description

SR-24 is used to refer to both the SR-24 and the

SR-20 throughout this manual. The SR-24 has inte-

grated GPS and Bluetooth

technology. The SR-20

does not, but is otherwise functionally identical.

The RIDGID SeekTech SR‑24 receiver gives utility locat‑

ing professionals the information they need to confident‑

ly determine the position of underground utilities�

The SR‑24’s Omnidirectional antenna system measures

electromagnetic signals and calculates the signal’s ori‑

entation strength, depth, and degree of distortion or in‑

terference� The display and the multidimensional audio

cues give you a locating experience that is immediately

intuitive�

For an added degree of confidence, the SR‑24 continu‑

ously monitors the electromagnetic field for interference

from conflicting signals that could distort its shape� When

the SR‑24 detects distortion, the SR‑24 emits audio

cues and displays on‑screen guidance so that appropri‑

ate action can be taken to avoid mismarking the utility’s

position�

Built on the trusted and time tested SR‑20 platform, the

SR‑24 has integrated GPS and Bluetooth

technology,

giving a real‑time stream of data to Bluetooth enabled

devices, including smart phones, tablets, and high preci‑

sion GPS instruments�

8 – English

SeekTech SR-24 and SR-20 Specifications

Dimensions

Length 285mm [11�2in]

Width 109mm [4�3in]

Height 790mm [31�1in]

Weight without batteries 1�5kg [3�3lb]

Power

Power rating

6 V, 375 mA (SR‑20)

6 V, 450 mA (SR‑24)

Battery type

Four size C,

1�5V alkaline

(ANSI/NEDA 14A,

IEC LR14), or

1�2V NiMH or Ni‑

Cad rechargeable

batteries

Power consumption

2�25 W (SR‑20)

2�7 W (SR‑24)

LCD

Resolution

Monochrome

240 × 160 pixels

Display size

45mm × 65mm

[1�8 in × 2�6 in]

Contrast ratio 700:1

Brightness

500 Cd/m2

Environmental

Operating temperature

‑20°C to 50°C

[‑4°F to 122°F]

Storage temperature

‑20°C to 60°C

[‑4°F to 140°F]

Relative humidity 5% to 95%

USB

Cable Mini‑B, 1�8 m [6ft]

Type

2�0

SD Card Micro 16 GB

SeekTech SR-24 Specifications

Bluetooth

Type Class 1

Profile RFCOMM

Transmit power 19�1 dBm

Operating spectrum 2402 – 2480 MHz

Receiver sensitivity ‑92 dBm

Operating range

Up to 1,000m

[3,281ft]

GPS

Processor

48‑channel

SiRFstarIV GSD4e

Accuracy

<2�5m [8�2ft]**

Tracking ‑163 dBm

Autonomous acquisition ‑147 dBm

Operating spectrum 1559 – 1610 MHz

**According to the documentation supplied by the man-

ufacturer of the internal SiRFstarIV GPS module, its

nominal accuracy is “<2.5m (65 percent, 24 hour stat-

ic, -130dBm).”

Standard Equipment

• Operator’s manual

• Instructional DVD

• Four size C alkaline batteries

• Marker chips

• Mini‑B USB cable

English – 9

Components

Handle

Speaker

Antenna Mast

Upper Antenna

Folding Joint

Lower Antenna

Gradient Antennas

Release Latch

Battery Compartment

Serial Number Label

Marker Chips

Folding Antenna Mast

Unfold the antenna mast and lock the folding joint into

place� When the job is complete, press the red release

latch to fold the antenna mast� Secure the folding mast

into the clip for storage or transportation�

NOTICE

You must unfold the antenna mast to use

the SR-24. To prevent damage to the

mast, do not snap or whip the SR-24 to

open or close it. Only open and close

the SR-24 manually.

USB Port Cover

USB Port

Micro SD Card Slot

10 – English

Keypad

Light Sensor LCD Screen

SR-24 Keypad

Key Function

Power Key/Right Arrow Key

Frequency Key/Left Arrow Key

Menu Key

Up Arrow Key

Down Arrow Key

Volume Key

Select Key

Operating Instructions

DANGER

Exposing the utility prior to digging is the only way

to verify its existence, location, and depth. If exca-

vating a utility, periodically recheck the measured

depth and position to avoid damaging the utility and

to identify additional utility signals that may have

been overlooked.

Quick Start

SR-24 is used to refer to both the SR-24 and the

SR-20 throughout this manual. The SR-24 has

integrated GPS and Bluetooth technology. The

SR-20 does not, but is otherwise functionally

identical.

The SR‑24 functions by measuring an electro‑

magnetic signal and estimating the position of its

source� The SR‑24 can locate the signal transmitted

by a RIDGID SeekTech transmitter or Sonde, other

manufacturer’s transmitters, or passive signals from

surrounding metallic conductors�

1� Insert four fully charged, size C, alkaline bat‑

teries into the battery compartment and turn

the knob clockwise to close�

2� Unfold the antenna mast and lock it into place�

3� Power on by pressing the Power Key �

4� Set the receiver and the transmitter to the

same frequency�

5� Begin tracing the line at a logical starting place

such as the transmitter hook up point�

Note: Refer to the Active Line Tracing, Passive Line

Tracing, and Sonde Locating sections that follow

for information on how to locate buried utilities with

the SR-24.

English – 11

Powering the System

Battery operation time varies with battery rating and use�

Four size C, alkaline batteries can power the SR‑24 for

10 to 15 hours�

NOTICE

Use batteries that are all the same type.

Mixing alkaline and rechargeable batter-

ies can cause over heating and battery

leakage.

To install or change the batteries, follow these steps:

1� Turn the knob on the battery compartment count‑

er‑clockwise and pull straight out�

2� Insert four size C batteries as shown on the label in‑

side the battery compartment�

Note: Make sure the batteries drop completely into

the compartment.

3� Fit the cover back onto the battery compartment,

press the cover down, and turn the knob clockwise

to close�

Low Battery Warning

When the batteries are low, a low battery warning ap‑

pears on the screen and a tone sounds every 10 minutes

before the SR‑24 powers off� When the low battery warn‑

ing appears, replace the batteries�

Note: If you are using rechargeable batteries, the volt-

age may drop quickly at the end of its charge resulting

in a shortened warning period before power failure.

Receiver Operation Modes

The SR‑24 can operate using two modes: Line Trace

Mode and Sonde Mode�

Line Trace Mode

In Line Trace Mode you can Active Line Trace by inten‑

tionally applying a signal onto the target line through

metal‑to‑metal conduction or non metal‑to‑metal induc‑

tion with a transmitter�

Also in Line Trace Mode, you can Passive Line Trace

by detecting signal energy coupled onto metallic con‑

ductors from nearby energy sources such as power

lines� Passive Line Trace Mode includes Passive Power,

Radio Broadband, and OmniSeek Broadband Modes�

Broadband frequencies target any signal in a range of

frequencies�

Note: Active signals within a broadband range are also

detected.

Line Trace Mode

Active Frequencies

Default

128 Hz

1 kHz

8 kHz

33 kHz

User Programmable 10 Hz – 35 kHz

Passive Frequencies

Default North America

60 Hz

< 4 kHz

Default Europe

50 Hz

< 4 kHz

Default Japan

50 Hz

60 Hz

< 4 kHz

Power Preprogrammed

50 Hz

60 Hz

100 Hz

120 Hz

User Programmable 10 Hz – 35 kHz

Radio Frequency Broadband

4 kHz – 15 kHz

> 15 kHz

OmniSeek Broadband Modes

(All three simultaneously)

< 4 kHz

4 kHz – 15 kHz

> 15 kHz

12 – English

Sonde Mode

Use Sonde Mode to locate a sonde that is inside a pipe,

conduit, or tunnel�

Sonde Mode Frequencies

Default 512 Hz

Preprogrammed

16 Hz

640 Hz

850 Hz

8 kHz

16 kHz

33 kHz

User Programmable 10 Hz – 35 kHz

Note: Sonde Mode and Line Trace Mode can

sometimes use the same frequency. Make sure the

mode icon next to the frequency that you are using is

the mode you intend to be locating with. Depth mea-

surements will be in error if the incorrect mode is used.

User Programmable Custom Frequencies

The SR‑24 comes preprogrammed with a selection of

frequencies that are set by default in Active Line Trace

Mode, Passive Line Trace Mode, and Sonde Mode� You

can also create custom frequencies to use the SR‑24

with transmitters from most manufacturers�

Note: Refer to the Custom Frequencies section for more

information.

Audio

Volume Control

To increase and decrease the volume level of the SR‑24’s

audio cues, first press the Volume Key � You can then

either press the Volume Key to cycle through volume set‑

tings, or press the Volume Key once and use the Up

and Down Arrow Keys to adjust the volume set‑

tings� Press the Select Key to exit the volume settings

screen�

In all modes, if the sound level reaches its maxi‑

mum frequency range (pitch), it rescales to the mid‑

dle of its frequency range� The modulation of fre‑

quency is used to indicate signal strength�

Line Trace Modes

The SR‑24 emits sounds related to the estimated posi‑

tion of the utility� If the utility’s estimated position is on the

left side of the receiver, you will hear a warbling sound�

If the utility’s estimated position is on the right side of

the receiver, you will hear the same warbling sound plus

short clicks�

In Active Line Trace Mode and Passive Line Trace Mode,

the SR‑24 emits a higher pitch as it approaches the tar‑

get� The rising pitch indicates an increasingly strong

Signal Strength�

When local conditions distort the shape of the signal

field, the Tracing Line is fuzzy and the audio contains

static� The degree of fuzziness and the amount of static

in the audio reflect the amount of distortion detected in

the signal field�

Sonde Mode

In Sonde Mode the pitch rises and falls relative to chang‑

es in the Signal Strength� As the SR‑24 moves away from

the sonde, the pitch falls� As the SR‑24 moves closer to

the sonde, the pitch rises�

English – 13

Display Elements

Line Trace Mode Display

The display elements shown below appear in Passive Line Trace Mode , Active Line Trace Mode , and Radio

Broadband Mode �

Proximity Number

Current Measurement (mA)

Battery Status

Receiver Operation Mode

Guidance Line

Guidance Arrows

Measured Depth

Tracing Line

(example shows distortion)

Signal Strength

Bluetooth

SD Card

Currently Set Frequency

GPS

GPS Estimated

Positional Error

Backlight

SD Card Usage Bar Graph

Line Trace Mode Display Elements

Icon Name Description

Active Line Trace

Mode

The Active Line Trace icon indicates the SR‑24 is set to an Active Line Trace

frequency�

Passive Power Line

Trace Mode

The Passive Line Trace icon indicates the SR‑24 is set to a Passive Power

Line Trace frequency�

Passive Radio

Frequency Broadband

Line Trace Mode

The Passive Radio Frequency Broadband Line Trace icon indicates the SR‑24

is set to a Passive Radio Frequency Broadband Line Trace frequency�

Passive OmniSeek

Line Trace Mode

The Passive OmniSeek Line Trace icon indicates the SR‑24 is set to a

Passive OmniSeek Line Trace frequency range� Refer to the OmniSeek

section for more information about OmniSeek Line Tracing.

Proximity Number

The Proximity Number represents the nearness of the target line to the SR‑24�

The larger the number, the closer you are to the target line�

Current Measurement

(mA)

Current Measurement (mA) appears in miliamps when the SR‑24 is directly

over the line�

Signal Strength

Strength of the signal detected by the Omnidirectional antennas� Observe the

Signal Strength to determine the maximum signal strength� At the maximum

signal strength, the receiver is over the target line�

Signal Angle

Signal Angle appears in place of Current Measurement (mA) when the

detected signal is at an angle greater than 35°�

Measured Depth

Measured Depth shows the approximate depth of the target line� The depth

appears in either meters (m) or feet (ft)� In addition to the measured depth

reading, Depth Average displays a Depth Average Report on screen� Refer to

the Depth Average section for more information.

14 – English

Line Trace Mode Display Elements

Icon Name Description

Tracing Line

The orientation and offset of the Tracing Line indicate the direction of the

target line relative to the position of the receiver� The Tracing Line Distortion

Response is enabled by default� When the Tracing Line Distortion Response

is enabled the Tracing Line also represents the amount of distortion detected

by the receiver and the approximate axis of the target line� Increasing levels of

field distortion are represented by increasing degrees of fuzziness�

Distortion Line

The Distortion Line represents the signal from the Upper Antenna node�

Compare the Tracing Line and the Distortion Line to estimate the degree of

distortion on the signal� The Distortion Line is disabled by default and only

appears if the Tracing Line Distortion response is disabled�

Guidance Arrows

When the Guidance Arrows are touching, they indicate the point where the

strength of the field is equal on both sides of the receiver�

Guidance Line

The Guidance Line shows the alignment of the Tracing Line and when the

orientation of the SR‑24 is close to the orientation of the utility�

Cross Hairs

The Cross Hairs are placed at the center of the Active View Area to represent

the receiver’s location�

Rotation Arrows

When the receiver is out of alignment with the target line, two rotation arrows

appear to indicate the direction you should turn the receiver to realign with

the target line� Correct orientation of the receiver is required for the Guidance

Arrows and Guidance Line to function properly� The Rotation Arrows only

appear when the receiver is not in line with the target line�

SD Card and Usage

Bar Graph

The SD Card and Usage Bar Graph icon indicates the SR‑24 is logging to the

installed SD Card� The Usage Bar Graph shows disk space usage�

GPS The GPS icon indicates the internal GPS feature is enabled�

GPS Estimated

Positional Error

GPS Estimated Positional Error is the number next to the GPS icon� It

indicates the Estimated Positional Error of the internal GPS� Refer to the

SR‑24 GPS section for more information�

No GPS Signal Lock Internal GPS signal is not locked and is searching for satellites�

Battery Status

The Battery Status icon indicates the amount of charge remaining in the

batteries�

Backlight The Backlight icon indicates the Backlight is on�

Bluetooth

The Bluetooth icon indicates the Bluetooth feature is enabled and the SR‑24

is connected to and paired with a Bluetooth enabled device�

English – 15

Sonde Mode Display

The display elements shown below appear in Sonde Mode �

Bluetooth

SD Card and Usage

Bar Graph

Signal Strength

Receiver Operation Mode

Pipe Direction

Pole

Zoom Ring

Cross Hairs

Signal Angle

Currently Set Frequency

Battery Status

Backlight

Measured Depth

GPS

GPS Estimated

Positional Error

Equator Line

SD Card and Usage

Bar Graph

Equator Line

Poles

Sonde Equator

No GPS Signal Lock

Bluetooth

Signal Strength

Currently Set Frequency

Receiver Operation Mode

Measured Depth

Battery Status

Signal Angle

Sonde Mode Display Elements

Icon Name Description

Sonde Mode

The sonde icon underneath the currently set frequency, indicates the SR‑24 is

set to a sonde frequency�

Signal Strength

Strength of the signal detected by the omnidirectional antennas� Observe the

signal strength to determine the maximum signal strength�

Signal Angle

The signal angle displays the measured polar angle of the SR‑24 to the sonde

dipole field�

Measured Depth

Measured depth shows the approximate depth of the target line� The depth

appears in either meters (m) or feet (ft)�

Pole The pole icon represents the location of a pole of the sonde’s dipole field�

Cross Hairs

The cross hairs are placed at the center of the active view area to represent the

receivers location�

Pipe Direction The pipe direction represents the approximate orientation of the sonde’s axis�

16 – English

Sonde Mode Display Elements

Icon Name Description

Sonde Equator

Two sonde equator icons appear along the equator line once the first pole has

been located�

Equator Line The equator line represents the equator of the sonde’s field�

Zoom Ring The Zoom Ring appears when the receiver moves close to one of the Poles�

SD Card and Usage

Bar Graph

The SD Card and Usage Bar Graph icon indicates the SR‑24 is logging to the

installed SD Card� The Usage Bar Graph shows disk space usage�

GPS The GPS icon indicates the internal GPS feature is enabled�

GPS Estimated

Positional Error

GPS Estimated Positional Error is the number next to the GPS icon� It indicates

the Estimated Positional Error of the internal GPS� Refer to the SR-24 GPS

section for more information.

No GPS Signal

Lock

Internal GPS signal is not locked and is searching for satellites�

Battery Status

The Battery Status icon indicates the amount of charge remaining in the

batteries�

Backlight The Backlight icon indicates the Backlight is on�

Bluetooth

The Bluetooth icon indicates the Bluetooth feature is enabled and the SR‑24 is

connected to and paired with a Bluetooth enabled device�

Note: Refer to the Customizing Display Elements section for instructions on how to customize display elements and for

information about additional display options.

English – 17

Understanding the Display

Refer to the SR‑20 Instructional Video for a demonstra‑

tion of how the display elements work during a locate

and to see how they work together to make your locates

accurate and efficient� The video is on a DVD included

with the SR‑24 manual pack or can be viewed online:

www�RIDGID�com/us/en/instructional‑videos

Tracing Line

The Tracing Line shows the location and direction of the

target line’s signal, change in direction of the target line,

and the amount of distortion on the target line�

If the signal is clear and the detected field is undistorted,

the following occurs:

• The Tracing Line appears as a clear, single line�

• The Guidance Arrows point to the center of the

screen�

• The Guidance Line aligns with the Tracing Line�

If the Tracing Line appears fuzzy, the field may be distort‑

ed by interfering electromagnetic fields� As the distortion

increases, the Tracing Line appears increasingly fuzzy

and the audio cue increases static noise�

Guidance Arrows and the Guidance Line

The Guidance Arrows reflect the difference in the Signal

Strength measurement made on either side of the

SR‑24� They point in the direction of the strongest signal�

The Guidance Line appears between the arrows when

the receiver is aligned with the target line�

The Guidance Line gets longer as the receiver aligns

with the direction of the target line� For best guidance

accuracy, align the Tracing Line and Guidance Line be‑

tween the Guidance Arrows� As a general rule, if there

is a moderate mismatch between the Tracing Line and

Guidance Line, the Guidance Line will be closer to the

actual utility position� Any mismatch is an indication of

distortion�

18 – English

Distortion

Electromagnetic receivers like the SR‑24 require a sig‑

nal directly from the target utility without modification

by environmental factors to obtain optimal accuracy�

Environmental factors can include the presence of near‑

by metallic conductors or the addition of electromagnetic

fields from other sources like fields radiating from adja‑

cent utilities� These factors may distort the shape of the

field received by the SR‑24 and are experienced by the

SR‑24 as distortion� The SR‑24 uses its Omnidirectional

antennas and gradient antennas to measure distortion

and provide audio and on‑screen indicators�

Nearby metallic conductors can distort the shape of the

target line’s electromagnetic field� The SR‑24 gives three

different indicators to alert you that distortion is present�

Take extra precautions when distortion is present to

confirm the accuracy of the locate.

Note: Refer to the Improving and Confirming Accuracy

section for information on improving the locate.

The Tracing Line Distortion Response activates when dis‑

tortion is detected� The Tracing Line Distortion Response

makes the Tracing Line appear fuzzy when distortion is

present� The fuzzier and more spread out the Tracing

Line is, the greater the distortion�

You can set the Tracing Line Distortion Response to

high “H,” medium “M,” low “L” (default), or “OFF�” Set the

Tracing Line Distortion Response to high to increase its

sensitivity to distortion�

Note: To change the Tracing Line Distortion Response

sensitivity settings, refer to the Customizing Display

Elements section.

When the Distortion Line is enabled, the tracing line fuzz‑

iness is turned off� The Tracing Line becomes a solid line

and the Distortion Line (dashed line) appears when dis‑

tortion is present� The dashed Distortion Line represents

the signal detected by the Upper Antenna and the solid

Tracing Line represents the signal detected by the Lower

Antenna�

Distortion is likely if the Distortion Line does not align

with the Tracing Line� The Distortion Line and the Tracing

Line may move randomly if the SR‑24 receives a weak

signal�

English – 19

Active Line Tracing

In Active Line Tracing Mode, the SR‑24 detects signals

generated by a line transmitter, such as the RIDGID

SeekTech ST‑33Q+� Transmitters can energize a target

line with a tracing signal in three ways: Direct Connect

(metal‑to‑metal contact), with an Inductive Clamp, or

using the transmitter’s internal transmitting antenna

through Induction�

Note: For complete instructions on generating a locating

signal with a transmitter, refer to the operator’s manual

that came with the line transmitter you are using.

Direct Connect

Energizing a target line by direct connection requires

metal‑to‑metal contact�

1� Use the clip’s built‑in scraper to remove paint, dirt,

or debris from the connection point to ensure good

metal‑to‑metal contact�

2� Attach one of the transmitter’s lead clips to the tar‑

get line�

3� Push the grounding stake into the ground as far as

possible and attach the transmitter’s other lead clip

to it�

With the transmitter’s lead clips attached to the tar‑

get line and the grounding stake, a circuit is created

for the signal to travel� The circuit allows current to

flow, energizing the target line�

Note: A weak ground connection can cause a poor

tracing circuit. Refer to the Improving the Tracing

Circuit section for more information on grounding.

4� Begin tracing the line�

Note: Refer to Tracing the Target Line section for in-

structions on how to trace the target line.

Inductive Clamp

To use the Inductive Clamp, connect it to the transmit‑

ter and close the clamp around the exposed pipe� The

transmitter energizes the clamp and induces a current

onto the target line� The clamp must be fully closed for it

to operate properly�

20 – English

Induction

To induce a signal onto the target line, place the trans‑

mitter over and in line with the target line� The transmit‑

ter must be oriented with respect to the line, as shown

below, to operate properly (orientation is specific to the

transmitter model)�

The transmitter’s internal transmitting antenna generates

a signal that energizes correctly oriented, nearby metal‑

lic objects�

To improve the circuit, ensure that both ends of the target

line are grounded and place the transmitter away from

other metallic conductors that may be nearby�

Note: For complete instructions on generating a locating

signal with a transmitter, please consult the operator’s

manual for your line transmitter.

Induction and Air-Coupling

WARNING

Air-coupling can lead to false locates.

With Induction, the transmitter broadcasts a signal in all

directions� If the receiver is too near to the transmitter,

the signal broadcast through the air will be stronger than

the signal from the target line underground� This is called

air‑coupling and it can prevent you from getting an accu‑

rate locate�

The impact of air‑coupling varies with each locate and

can occur at ranges greater than 20m [70ft] if the utili‑

ty is deep or poorly grounded� Very weak inductive cou‑

pling and deep utilities result in greater air‑coupling rang‑

es� Always confirm the detection of utilities and the depth

measurement readings by testing for air‑coupling� Read

the following sections for instructions on how to test for

air‑coupling�

Testing for Air-Coupling

When the receiver is severely air coupled it will warn you

by hiding the Tracing Line and Guidance Arrows� Even

if you see these displayed, the receiver may still be dis‑

playing results corrupted by air‑coupling� There are two

ways you can test for air‑coupling: the 45° tilt test and the

depth verification test�

To perform the 45° tilt test, follow these steps:

1� With the SR‑24 aligned with the target line, touch

the Lower Antenna to the ground and tilt the SR‑24

at a 45° angle toward the transmitter�

2� Note the depth�

3� With the Lower Antenna still touching the ground, tilt

the SR‑24 away from the transmitter at a 45° angle�

4� Note the depth�

If the tilted depth reading changes significantly compar‑

ing the two cases, air‑coupling is occurring�

Note: The depth reading will not be an accurate reading

of the target line’s depth.

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