RIDGID SeekTech ST-33Q User manual

SeekTech®ST-33Q
Record product serial number below as it appears on the nameplate.
Serial
No.
Operator’s Manual
WARNING!
Read this Operator’s Manual
carefully before using this
tool. Failure to understand
and follow the contents of
this manual may result in
electrical shock, fire and/or
serious personal injury.
SeekTech®ST-33Q

2 - English
SeekTech®ST-33Q
Table of Contents
Recording Form for Machine Serial Number ��������������������������������������������������������������������������������������������������������������������������� 1
Safety Symbols�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 3
General Safety Rules
Work Area Safety ���������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 3
Electrical Safety ������������������������������������������������������������������������������������������������������������������������������������������������������������������������������ 3
Personal Safety������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 3
Equipment Use and Care���������������������������������������������������������������������������������������������������������������������������������������������������������������� 3
Service�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 4
Specific Safety Information ���������������������������������������������������������������������������������������������������������������������������������������������������������� 4
ST‑33Q Safety��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 4
Description, Specifications, and Standard Equipment
Description�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 5
Specifications���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 5
Standard Equipment ����������������������������������������������������������������������������������������������������������������������������������������������������������������������� 5
ST‑33Q Components ���������������������������������������������������������������������������������������������������������������������������������������������������������������������� 6
Icon Legend�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 6
High Voltage Indicator ���������������������������������������������������������������������������������������������������������������������������������������������������� 7
High Temperature Warning ��������������������������������������������������������������������������������������������������������������������������������������������� 7
Pre‑Operation Inspection�������������������������������������������������������������������������������������������������������������������������������������������������������������� 7
Work Area and Equipment Set Up
Kick Stand Positioning���������������������������������������������������������������������������������������������������������������������������������������������������� 8
ST‑33Q Magnetic Clips��������������������������������������������������������������������������������������������������������������������������������������������������� 8
Powering the ST‑33Q ���������������������������������������������������������������������������������������������������������������������������������������������������������������������� 9
Operating Instructions
Powering On the ST‑33Q ���������������������������������������������������������������������������������������������������������������������������������������������������������������� 9
Direct Connect Mode �������������������������������������������������������������������������������������������������������������������������������������������������������������������� 10
Inductive Clamp Mode ������������������������������������������������������������������������������������������������������������������������������������������������������������������ 12
Inductive Mode������������������������������������������������������������������������������������������������������������������������������������������������������������������������������ 13
Customizing the ST‑33Q ��������������������������������������������������������������������������������������������������������������������������������������������������������������� 15
Helpful Hints���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 18
Cleaning Instructions������������������������������������������������������������������������������������������������������������������������������������������������������������������� 18
Accessories ������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������ 18
Transport and Storage ����������������������������������������������������������������������������������������������������������������������������������������������������������������� 18
Service and Repair ����������������������������������������������������������������������������������������������������������������������������������������������������������������������� 19
Disposal������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 19
Troubleshooting����������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 20
Frequencies Used by Various Manufacturers ������������������������������������������������������������������������������������������������������������������������ 21
Lifetime Warranty ������������������������������������������������������������������������������������������������������������������������������������������������������������Back Cover
Other trademarks or trade names may be used in this document to refer to either the entities claiming the marks and names or their products� RIDGID
disclaims any proprietary interest in trademarks and trade names other than its own�

English - 3
SeekTech®ST-33Q
Safety Symbols
In this operator’s manual and on the product, safety symbols and signal words are used to communicate important safety
information. This section is provided to improve 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 operator’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 injury�
This symbol indicates the risk of electrical shock�
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
atmospheres, such as in the presence of
flammable liquids, gases, or dust. Equipment can
create sparks which may ignite the dust or fumes�
• Keep children and bystanders away while
operating equipment. Distractions can cause you
to lose control�
Electrical Safety
• Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges, and
refrigerators. There is an increased risk of electrical
shock if your body is earthed or grounded�
• Do not expose equipment to rain or wet
conditions. Water entering equipment will increase
the risk of electrical shock�
• Do not abuse the cord. Never use the cord for
carrying, pulling, or unplugging the power tool� Keep
cord away from heat, oil, sharp edges, and moving
parts� Damaged or entangled cords increase the risk
of electric shock�
• If operating equipment in a damp location is
unavoidable, use a ground fault circuit interrupter
(GFCI) protected supply. Use of a GFCI reduces
the risk of electric 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
common 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 personal injury�
• Use personal protective equipment. Always wear
eye protection� The appropriate use of protective
equipment 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
equipment in unexpected situations�
• Dress properly. Do not wear loose clothing or
jewelry� Keep your hair, clothing, and gloves away
from moving parts� Loose clothes, jewelry, and long
hair can be caught in moving parts�
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�

4 - English
SeekTech®ST-33Q
• Do not use equipment if the power switch does
not turn it ON and OFF. Any equipment that cannot
be controlled 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
making 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
equipment or these instructions to operate the
equipment. Equipment can be dangerous in the
hands of untrained users�
• Maintain equipment. Check for misalignment or
binding of moving parts, missing parts, breakage
of parts, and any other condition that may affect
the equipment’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 could 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�
Service
Ensure a qualified repair person services your equipment
using only identical replacement parts to maintain
the safety of the tool� Remove the batteries and refer
servicing to qualified service personnel under any of the
following conditions:
• If liquid has been spilled or objects have fallen
into product�
• If the product does not operate normally when
following the operating instructions�
• If the product has been dropped or damaged�
• When the product exhibits a distinct change in
performance�
Specic Safety Information
WARNING
This section contains important safety information that is
specific to the ST‑33Q. Read these precautions carefully
before using the ST‑33Q to reduce the risk of electrical
shock, fire, or other serious personal injury.
SAVE ALL WARNINGS AND INSTRUCTIONS
FOR FUTURE REFERENCE!
Keep this manual with the equipment for use by the operator�
ST‑33Q Safety
• An improperly grounded electrical outlet can
cause electrical shock and/or severely damage
equipment. Always check work area for a properly
grounded electrical outlet� Presence of a three‑
prong or GFCI outlet does not ensure that the outlet
is properly grounded� If in doubt, have the outlet
inspected by a licensed electrician�
• Do not operate this equipment if operator or
ST‑33Q is standing in water. Operating the ST‑33Q
while in water increases the risk of electrical shock�
• Do not use where a danger of high voltage contact
is present. Do not attach leads to high voltage lines�
The equipment is not designed to provide high
voltage protection and isolation� Use high voltage
precautions when disconnecting the leads�
• Always attach leads before turning the ST‑33Q
ON and always turn OFF the ST‑33Q before
disconnecting the leads to reduce the risk of
electrical shock.
• Follow local guidelines and call before digging.
Locating equipment uses electromagnetic fields that
can be distorted and interfered with� More than one
utility may be present in a given area� Follow local
guidelines and service procedures� Confirm location
of utilities before digging�
• Read and understand this operator’s manual,
and the instructions for any other equipment in
use and all warnings before operating the ST‑33Q.
Failure to follow all instructions and warnings may result
in property damage and/or serious personal injury�
• Practice good hygiene. Use hot, soapy water to
wash hands and other body parts after handling
or using equipment� To prevent contamination from
toxic or infectious material, do not eat or smoke while
operating or handling equipment�
The information supplied with this product cannot
cover all possible conditions and situations that
may occur, and should be used in conjunction with
appropriate training, sound judgment, and good
work practices.These factors cannot be built into the

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SeekTech®ST-33Q
product, but must be supplied by the operator.
The EC Declaration of Conformity (890‑011‑320�10) will
accompany this manual as a separate booklet when
required�
If you have any question concerning this RIDGID product:
• Contact your local RIDGID distributor�
• Visit www�RIDGID�com or www�RIDGID�eu to find
your local RIDGID contact point�
• Contact RIDGID Technical Services Department
at rtctechservices@emerson�com, or in the U�S�
and Canada call 800‑519‑3456�
Description, Specications, and
Standard Equipment
Description
The ST‑33Q is a powerful, multi‑frequency transmitter
that can be used in conjunction with a SeekTech locator
to find buried conductors such as pipes, cables, and
wires�
The ST‑33Q can apply an active tracing signal to target
a conductor using the following three modes:
• Direct Connect — The leads on the ST‑33Q connect
directly to the target conductor and a suitable ground�
• Inductive Clamp — The optional inductive clamp
encircles the target conductor which eliminates
metal‑to‑metal contact�
• Inductive — The ST‑33Q is placed over and in‑line
with a conductor� The internal antenna will induce a
signal to locate the target conductor�
In addition to a series of defualt frequencies, the ST‑33Q
can also accept custom frequency settings up to 490
kHz�
NOTE
The ST‑33Q complies with Part 15 of FCC
rules in accordance with the following: Operation must not
cause harmful interference and this device must accept
any interference received, including interference that may
cause undesired operation.
Specications
Table 1
ST‑33Q Specifications
Weight:
without batteries 10�65 lb [4�8 kg]
Dimensions:
Depth 7�96 in [20�2 cm]
Width 16�06 in [40�8 cm]
Height 14�18 in [36�0 cm]
Cable length 1�4 ft – 25 ft [0�4 m – 7�6 m]
Output power:
External power adapter 10 W
Batteries 5 W
Power settings:
Internal batteries 5 mA –400 mA
NIMH batteries ≤1,000 mA
External power supply ≤1,000 mA
Default settings 60 Hz, 2 hour shutoff, 100
mA, Direct connect mode
Default frequencies 129 Hz, 1 kHz, 8 kHz,
33 kHz, 93 kHz, 262 kHz
Ingress Protection (IP) 65
Standard Equipment
• ST‑33Q
• Operator’s Manual
• Instructional DVD
• Direct connect leads and clips
• Grounding stake

6 - English
SeekTech®ST-33Q
ST‑33Q Components
Lead Clip
Coil Cord
Battery Compartment Carriage (2)
Display Screen
Keypad
External Power Jack
Inductive Clamp Jack
Figure 1 – Front View Transmitter Components
Grounding Stake
Support Post
Kick Stand
Lead Clip
Serial Number
Instructional Label
(side and bottom)
Figure 2 – Back View Transmitter Components
Inductive Mode
Select Key
Frequency Key/Left
Arrow Key Down Arrow Key
Power Key
Main Menu/Back Key
Up Arrow Key
High Voltage Indicator
Figure 3 – Keypad
Icon Legend
Table 2
Keypad Icons
Icon Name Function
Inductive Mode
Toggles between Inductive
Mode and Direct Connect
Mode�
Up Arrow Key Up Arrow
Select Key
Activates a frequency and
selects highlighted menu
choices�
Down Arrow Key Down Arrow
Main Menu Key
Activates the Main Menu�
Moves back one level within
submenus�
Frequency Key/
Left Arrow Key
Steps through selected
frequencies in the active
mode� Long press displays a
scrollable list of frequencies�
Also acts as the Left Arrow
Key within menus�
Power Key/Right
Arrow Key
Powers the ST‑33Q ON and
OFF� Also acts as the Right
Arrow Key within menus�

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SeekTech®ST-33Q
Table 3
Screen Icons
Icon Definition
Available Frequencies
Sub Menus
Tools Menu
LCD Screen Brightness Adjustment
Audio ON/OFF
Auto Shutdown Setting
Add Frequencies to Main Menu
Set User‑Defined Frequencies
Standard Power Mode
NiMH Batteries Only
Information Screen
Factory Reset
Delete User‑defined Frequencies
Odometer Option
Battery Level Symbol
High Voltage Indicator
If connected to an energized line, the voltage on the
line can cause excess current to be forced through the
ST‑33Q� The ST‑33Q has a detection circuit that can
sense excess current and disconnect output from the
energized line� If the ST‑33Q senses excess current, a
warning message will appear on the screen, a warning
beep will sound, and the High Voltage LED will turn ON
(See Item 1, Figure 4)�
1
Figure 4 – High Voltage LED
WARNING
If the High Voltage LED turns ON, turn OFF the ST‑33Q to
reset the detection current. After turning OFF the ST‑33Q,
carefully disconnect the ST‑33Q using high voltage
precautions. Do not use the transmitter to test for high
voltage. Connecting the ST‑33Q to external voltages
greater than 250 V will damage the unit.
High Temperature Warning
If the internal temperature of the ST‑33Q reaches 167°F
[67°C] or greater, a warning will appear on the screen
(See Figure 5)�
Figure 5 – High Temperature Warning
If the high temperature warning appears, the ST‑33Q will
automatically reduce power� If the internal temperature
reaches 176°F [80°C] the ST‑33Q will suspend output�
If the internal temperature reaches 176°F [80°C], turn
OFF the ST‑33Q to avoid damage and ensure a RIDGID
Independent Authorized Service Center services and
repairs the unit�
Pre‑Operation Inspection
WARNING
Before each use, inspect the ST‑33Q and correct any
problems to reduce the risk of serious injury from electrical
shock or other causes and prevent machine damage.
1� Confirm that the power is OFF, that any external
power and cords are disconnected, and that the
battery is removed� Inspect the cords, cables, and
connectors for damage or modification�
2� Clean any dirt, oil, or other contamination from the
ST‑33Q to aid in inspection and to prevent the unit
from slipping from your grip during transport or use�
3� Inspect the ST‑33Q for any broken, worn, missing,
misaligned or binding parts, or any other condition
which might prevent safe, normal operation�

8 - English
SeekTech®ST-33Q
4� Inspect any other equipment being used per its
instructions to make sure it is in good, usable
condition�
5� If any problems are found, do not use the equipment
until the problems are corrected�
Work Area and Equipment Set Up
WARNING
Set up the ST‑33Q and work area in accordance with these
procedures to reduce the risk of injury from electrical
shock, fire, and other causes and to prevent damage to
the ST‑33Q.
1� Check work area for the following:
• Adequate lighting�
• Flammable liquids, vapors, or dust that may ignite� If
present, do not work in area until sources have been
identified and corrected� The ST‑33Q is not explosion
proof� Electrical connections can cause sparks�
• Clear, level, stable dry place for operator� Do not use
the machine while standing in water�
• Clear path to electrical outlet that does not contain any
potential sources of damage for the power cord when
using external power�
2� Inspect the line to have a signal applied to it� The
line must be metal to allow the ST‑33Q to locate
it� If using the transmitter on insulated conductors,
ground the target conductor at each end to ensure
that the signal will be strong enough to locate� The
ST‑33Q is not designed to provide high voltage
insulation or protection� Do not use where a danger
of high voltage contact is present�
3� Determine the presence of chemicals� If chemicals
are present, it is important to understand the
specific safety measures required to work around
the chemicals� Contact the chemical manufacturer
for required information�
4� Determine the correct equipment for the application�
The ST‑33Q is made to locate conductors
underground� Inspection and locating equipment
for other applications can be found in the Ridge
Tool Catalog or online at www�RIDGID�com or www�
RIDGID�eu�
5� Make sure all equipment has been properly
inspected�
6� Evaluate the work area and determine if any
barriers are needed to keep bystanders away�
Bystanders can distract the operator during use� If
working near traffic, erect cones or other barriers
to alert drivers�
NOTICE
Do not place two ST‑33Qs in inductive Mode
with the power ON within 10 ft [3 m] of each other. The
inductive output of each ST‑33Q can reinforce the load of
another ST‑33Q and can possibly damage one or both of
the units.
Kick Stand Positioning
The kick stand on the back of the ST‑33Q allows the unit
to be positioned on its back which allows easy viewing
of the screen and access to the controls� Positioning
the ST‑33Q on the kick stand also helps place the unit
in a convenient position for locating when using Direct
Connect Mode�
ST‑33Q Magnetic Clips
The ST‑33Q contains advanced connection clips that
can be attached mechanically or magnetically� The front
end of the clip includes a scraper tip (See Item 1, Figure
6) which can be used to remove rust or paint� Before
connecting the ST‑33Q leads to a flat, metal surface
such as a steel junction box or fire hydrant, use the tip
of the clip to scrape off rust and place the teeth of the
clip (See Item 2,Figure 6) in contact with the metal� The
teeth and the finger‑guard (See Item 3, Figure 6) will
support the clip and the magnet (See Item 4, Figure 6)
will hold the clip to the metal�
NOTE
The magnetic clips provided with the ST‑33Q
contain strong magnets. Do not place the clips near data
storage devices, credit cards, ATM cards, or other
magnetically encoded data.
3
41
2
Figure 6 – ST‑33Q Magnetic Clip

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SeekTech®ST-33Q
Powering the ST‑33Q
WARNING
Disconnect external leads from any energized utility before
opening the battery compartment. To prevent overheating
and leakage, do not mix battery types or used and new
batteries. Always remove the batteries before shipping the
ST‑33Q.
Battery Power
Install batteries in the ST‑33Q in accordance with the
following:
1� Turn the knob on the battery compartment caps
counterclockwise�
2� Insert three D‑cell batteries into each battery
compartment� High capacity rechargeable NiMH
batteries are recommended for use with the
ST‑33Q� Ensure the positive end of each battery
points outward�
3� Although the batteries will protrude slightly, push
the caps over the battery ends and screw the caps
firmly into place�
Using six new alkaline D batteries with a load of 100 Ω
at a frequency of 8 kHz and a power level of 100 mA will
power the ST‑33Q for approximately 17�5 hours� Battery
operation time will vary with battery rating and use�
Battery Check
Upon start up, the ST‑33Q will check available power and
will indicate the estimated battery levels in accordance
with the following:
Table 4
Battery Status LED Indicators
Battery Icon Charge Level
One bar Low battery
Two bars Partial battery
Three bars Full battery
Alternate Power Supply
The ST‑33Q can also operate by using an external
10‑28VDC power source with a supply no less than 35 W�
If using an adapter, read and follow the instructions
as specified by the manufacturer� To prevent electrical
shock and damage, ensure the external power source
is fully isolated from the ground and power mains� Do
not use a non‑isolated power supply with the ST‑33Q�
Ensure the adapter cord has a clear, dry path and does
not contain any potential source of damage� Use dry
hands to plug in the cords�
Operating Instructions
WARNING
Always wear eye protection to protect your eyes against dirt
and other foreign objects. Follow operating instructions to
reduce the risk of injury from electrical shock and other
causes.
Powering On the ST‑33Q
Power ON and start using the ST‑33Q in accordance
with the following:
1� Press the Power Key to start the unit� Check the
battery level symbol and ensure the batteries
are fully charged�
2� After turning ON the ST‑33Q a splash screen will
appear for 3 seconds which will show the selected
frequency and an icon representing the current
connection mode (See Figure 7)� If connected to a
conductor, a beep will sound in intervals�
Figure 7 – ST‑33Q Splash Screen
3� Press the Main Menu Key to access a list of
available frequencies, the Tools Menu , and
the Information Menu �
4� Use the Up and Down Arrow Keys to scroll
through the list of available frequencies� Press the
Select Key to activate a highlighted frequency�
The box next to each frequency will be checked
when activated (See Figure 8)�
Figure 8 – Main Menu List of Available Frequencies

10 - English
SeekTech®ST-33Q
5� Press the Main Menu Key after activating
frequencies and to return to the normal operating
display� The last activated frequency will appear in
the upper right hand corner of the display along
with the current mode setting�
6� Press the Frequency Key to allow the ST‑33Q
to scroll through the set of activated frequencies
for the current set mode� If the desired frequency
does not appear, press the Main Menu Key to
return to activate additional frequencies (See the
“Customizing the ST-33Q”section of this Operator’s
Manual for more information).
7� Press the Power Key again to turn OFF the
ST‑33Q� After a short countdown, the ST‑33Q will
shut down� Press any key during the countdown to
cancel the shut down�
Note that frequency lists are context sensitive which
allows separate lists of frequencies for Direct Connect
Mode, Inductive Clamp Mode, and Inductive Mode�
Direct Connect Mode
1
Figure 9 – Direct Connect Screen
Direct Connect Mode is most commonly used when
the target utility is readily accessible� Do not use Direct
Connect Mode on energized conductors�
When using Direct Connect Mode, the Direct Connect
Icon will appear in the top of the screen (See Item 1,
Figure 9)� Use the ST‑33Q in Direct Connect Mode in
accordance with the following:
1� Ensure that the target conductor is not live� The
ST‑33Q is not designed to connect to live conductors�
2� Chose connection locations for the ground spike
and the target conductor� The ST‑33Q leads will
extend up to 25 ft [7�6 m]� The further the leads
are extended, the more incidental the signal and
the further the receiver should be used from the
transmitter to avoid confusing the signals with the
cable leads� If performing a location close to the
transmitter, keep the leads as short as possible
and store excess lead cable in the side pockets of
the transmitter�
Figure 10 – Attaching the ST‑33Q Lead to the
Ground Stake
3� Remove the ground spike from the bottom of the
ST‑33Q and insert it into the earth�To enable a good
ground, insert the ground spike as far as possible
into the earth� If desired, wet the earth around the
ground spike to improve grounding and to lower the
resistance of the ground� With the ST‑33Q powered
OFF, attach the ST‑33Q lead to the ground stake
(See Figure 10)� In lieu of using the grounding stake
provided with the ST‑33Q, attach the cable lead to
other things like a shovel blade or a larger rod sunk
into the earth� Using other grounding equipment
may also improve grounding by increasing the area
in contact with the earth�
Figure 11 – Connecting the ST‑33Q Cable Lead to
the Target Conductor
4� Scrape away any dirt, paint, corrosion, or other
coatings on the target conductor to ensure good
contact with the cable lead, to lower the resistance
of the circuit, and to produce a stronger tracing
signal� Connect the other cable lead to the target
conductor (See Figure 11)� Non‑conductive pipes,
such as those made of clay or plastic, cannot carry
a tracing current without a trace wire� Plastic pipes

English - 11
SeekTech®ST-33Q
typically have a trace wire installed with the pipe for
tracing purposes� Clip the cable lead to the trace
wire to enable tracing�
NOTE
Always connect the lead to the ground stake
before connecting another lead to the target line to direct
any current within the target conductor away from the user.
5� After attaching both leads, press the Power Key
to turn ON the ST‑33Q� After powering ON, the
ST‑33Q will emit ascending beeps and will then
pause to measure the current flowing through the
target conductor� Faster beeps will indicate a higher
detected current� To turn OFF the sound, press the
Main Menu Key , highlight the Audio Icon ,
and press the Select Key to toggle between
“OFF” and “ON�”
6� Select a frequency, check the circuit, and adjust
the current in accordance with the “Selecting a
Frequency” section of this Operator’s Manual�
7� Turn on the receiver or locator and follow the
instructions specified in the operator’s manual�
Ensure the frequency on the receiver or locator
matches the ST‑33Q� If the receiver signal
increases when the receiver or locator is held near
the ST‑33Q, it is correctly picking up the transmitted
frequency�
8� After completing the location, press the Power
Key to turn OFF the ST‑33Q� To reduce the
risk of electrical shock, turn the unit OFF before
disconnecting the leads and remove the lead from
the target conductor before disconnecting the lead
from the ground spike�
NOTE
When the ST‑33Q is ON and in Direct Connect
Mode do not come in contact with the scraper tip and only
hold leads by its plastic sheathing.
Selecting a Frequency
The following frequencies are available for use on the
ST‑33Q using Direct Connect Mode:
• 128 Hz
• 1 kHz [1,024 Hz]
• 8 kHz [8,192 Hz]
• 33 kHz [32,768 Hz]
• 93 kHz [93,623 Hz]
• 262 kHz [262,144 Hz]
To select an active frequency, press the Frequency Key
until the desired frequency appears�
Push and hold the Frequency Key to bring up a
pop‑up list of available frequencies (See Figure 12)� Use
the Up and Down Arrow Keys to scroll through the
pop‑up list� When the desired frequency is highlighted,
press the Select Key to activate it�
Figure 12 – Frequency Pop‑up List
The ST‑33Q also allows the addition of custom, user
defined frequencies (See the section on adding user
defined frequencies in this Operator’s Manual for more
details).
WARNING
The ST‑33Q is designed to withstand up to 240VAC between
the two leads. This protection is not intended to be used
continuously. If the ST‑33Q encounters a target conductor
voltage greater than 42 V (RMS), the High Voltage Present
Indicator LED will flash red and the screen will display the
safety alert symbol and the words, “HV MODE.”To reduce
the risk of electrical shock, do not touch the transmitter,
cords, or connections during this time. Use high voltage
precautions to disconnect the ST‑33Q.
Adjusting the Current
Use the Up and Down Arrow Keys to adjust the
current� In Direct Connect Mode, the ST‑33Q will
increase the current as close to the following levels as
possible:
• 25 mA
• 50 mA
• 100 mA (default)
• 200 mA
• 400 mA
High Output Mode
Under normal operating conditions, the output in Direct
Connect Mode is limited to 400 mA to extend battery
life� For higher output, adjust the ST‑33Q to one of the
following frequencies:
• 600 mA
• 800 mA
• 1,000 mA
To adjust the ST‑33Q to a higher output perform the
following:

12 - English
SeekTech®ST-33Q
1� Press the Main Menu Key �
2� Use the Down Arrow Key to scroll down to the
Tools Menu and then press the Select Key �
3� Use the Down Arrow Key to scroll down to
“Output Mode�” Press the Select Key to toggle
the output mode between 400 mA
and 1,000 mA �
1
Figure 13 – Box Icons
The ST‑33Q will display a number of box icons next
to the current (See Item 1, Figure 13)� Hollow boxes
represent selected power levels� Solid boxes represent
actual output current levels� If the display screen shows
“Lo” the circuit is open or the current has a very high
resistance and may require improvements in order to
accurately locate�
NOTE
Using a higher power setting will produce a
stronger signal on the receiver, but will reduce battery life.
Only use 1,000 mA High Output Mode if using high
capacity NiMH D cell batteries or external power. Do not
use the ST‑33Q in high output mode with standard alkaline
batteries.
Checking the Receiver
To ensure that the ST‑33Q and the receiver are set to
the same frequency, hold the receiver near the ST‑33Q
cables and confirm that the signal is being received�
Inductive Clamp Mode
Figure 14 – ST‑33Q with an Inductive Clamp
NOTE
Ensure the inductive clamp contains the
symbol which indicates that the clamp is rated for
the higher output of the ST‑33Q. Use an inductive clamp
rated for the higher output of the ST‑33Q as specified by
in the accessory section located in the end of the this
Operator’s Manual�
Use the ST‑33Q with an inductive clamp in accordance
with the following:
1� Confirm that the target conductor is not live� The
ST‑33Q is not designed to be connected to live
conductors�
2� If the ST‑33Q is ON, press the Power Key to turn
the ST‑33Q OFF� Do not turn ON the ST‑33Q until
the inductive clamp has been attached�
3� Insert the inductive clamp plug into the port on
the ST‑33Q located underneath the keypad� After
plugging in the inductive clamp, the ST‑33Q will
automatically switch to Inductive Clamp Mode,
disable the cables, and display the word “Clamp”
on the screen�
4� Place the jaws of the inductive clamp around the
target conductor� Ensure the jaws of the inductive
clamp fully close (See Figure 15)�

English - 13
SeekTech®ST-33Q
Figure 15 – Inductive Clamp Connected to a Cable
5� Press the Power Key to turn ON the ST‑33Q
and select a frequency for locating� Check the
circuit and adjust the current� The ST‑33Q will
automatically set the frequency to 33 kHz the
first time Inductive Clamp Mode is used� After the
first use, the ST‑33Q will automatically use the
frequency last used in Inductive Clamp Mode� The
ST‑33Q will also default to 50 percent power level
to conserve battery power while in Inductive Clamp
Mode�
6� After completing the location, press the Power Key
to turn OFF the ST‑33Q before disconnecting
the inductive clamp�
Inductive Mode
WARNING
Disconnect the lead clips from any external conductors
before switching the ST‑33Q to Inductive Mode. If the
lead clips are connected to an external conductor and
the ST‑33Q is switched to Inductive Mode, a warning will
appear and an operator override will be required.
When using Inductive Mode, only 8 kHz and 33 kHz
frequencies will be available for use on the ST‑33Q�
To use the ST‑33Q in Inductive Mode, perform the
following:
1� Place the ST‑33Q so the orientation mark located
on top of the ST‑33Q aligns with the target conductor
(See Item 1, Figure 16)�
1
Figure 16 – Orientation Marks Aligning with the
Target Conductor
2� Place the ST‑33Q over the line to be traced (See
Figure 17)�
Figure 17 – Inductive Mode Alignment
3� Press the Power Key to turn ON the ST‑33Q�
Press the Inductive Mode Key to toggle the
ST‑33Q between Direct Connect Mode and
Inductive Mode�
Figure 18 – Inductive Mode Screen
Do not use clips and leads in Inductive Mode� The
ST‑33Q will automatically set the frequency to 33 kHz
the first time Inductive Mode is used� After the first use,
the ST‑33Q will automatically use the frequency last
used in Inductive Mode�

14 - English
SeekTech®ST-33Q
Ground both ends of the utility for the best signal
induction�
The ST‑33Q will also default to 50 percent power level
to conserve battery power while in Inductive Mode� If
higher power is required for a clear signal, use the Up
and Down Arrow Keys and select either 25 percent,
50 percent, or 100 percent� In High Output Mode, a
power of 200 percent can also be selected� Using
a power level of 100 percent or greater will drain the
batteries rapidly� The power‑setting boxes will blink if set
at 100 mA or higher to indicate the higher rate of battery
consumption (See Figure 19).
Figure 19 – High Power Level Warning
Self‑Tuning Transmitter
In Inductive Mode, the ST‑33Q self‑tunes by modifying
its own circuit to resonant at a frequency that matches
the frequency selected by the operator�
In rare situations, if using Induction Mode near a mass of
metal or next to a transformer for example, the ST‑33Q may
not be able to tune to a desired frequency� The ST‑33Q will
attempt to tune to a desired frequency for up to 6 seconds�
If the ST‑33Q cannot tune to a desired frequency after
6 seconds, the ST‑33Q will suspend output, display a
warning, and emit a low beep (See Figure 20)�
Figure 20 – Self‑Tuning Warning
If the ST‑33Q cannot tune to a desired frequency
perform one of the following:
1� Press the Select Key to attempt to retune at the
current frequency�
2� Press the Inductive Mode Key to return to Direct
Connect Mode�
3� Move the ST‑33Q to a different location to perform
the locate�
4� Press the Frequency Key and select a different
frequency to try in Inductive Mode�
Air‑Coupling
In Inductive Mode, the ST‑33Q will generate a field
through the air around it;including the ground underneath�
If within air‑coupling range of the ST‑33Q, the receiver
will measure this field instead of the target conductor�
Air‑coupling may distort readings and misconstrue the
location of the target conductor�
Air‑coupling can occur over a wide range; greater than
70 ft [20 m] if the induced utility is deep and poorly
grounded� Very weak induction and deep utilities will
result in greater air‑coupling distances� Always confirm
the detection of utilities and the readings of depth
measurements�
Air‑coupling does not depend on the output power of
the transmitter and cannot be reduced by turning down
the power� Air‑coupling only depends on the ratio of the
field from the transmitter compared to the induced field
in the target utility�
Note that air‑coupling can vary continuously� Be aware
of the difference between the transmitter’s field and
the induced field of the utility being traced� While both
will have the same frequency, the transmitter’s field is
limited to the region around the transmitter itself� Be
sure to look overhead for power lines that could also
confuse the locate�
Testing for Air‑Coupling
To test for air‑coupling, tilt the locator at a 45 degree angle
towards the ST‑33Q and ensure the lower antenna of the
locator touches the ground� Afterwards, tilt the locator
45 degrees away from the ST‑33Q and observe the
depth reading� If the depth reading changes significantly,
air‑coupling may be occurring (See Figure 21)�
Figure 21 – Testing for Air‑Coupling
Alternatively, test for air‑coupling by standing 20 ft [6 m]
away from the ST‑33Q� With the lower antenna on the
ground, take note of the indicated depth measurement
on the locator� Raise the locator vertically 18 in [45
cm] and observe the change in the depth indication� If
the locator only reads the conductor, the depth should
increase accordingly� If the locator is air‑coupling, the
depth indication will not change by 18 in [45 cm], but will

English - 15
SeekTech®ST-33Q
change disproportionately�
Using the Kick Stand in Inductive Mode
In Inductive Mode, the kick stand allows the aiming of the
output field to maximize the intersection with the conductor
of interest while also reducing the field’s intersection with
a nearby known conductor (See Figure 22).
Figure 22 – Using the Kickstand
Customizing the ST‑33Q
Tools Menu
Access the Tools Menu from the Main Menu
to perform the following:
• Adjust the LCD screen contrast
• Modify the list of Main Menu frequencies
• Turn ON or OFF the current‑indication beep
• Restore the default settings
• Create and store user‑defined frequencies
Figure 23 – Selecting the Tools Menu
Use the Up and Down Arrow Keys to highlight an
option and press the Select Key to make changes
within the selection�
LCD Setting
From the Tools Menu select the LCD Setting
option to adjust the brightness of the LCD
screen� Use the Up and Down Arrow Keys or use
the Frequency Key and the Power Key as left and
right arrow keys to adjust the brightness (See Figure 24)�
Figure 24 – Adjusting LCD Screen Brightness
If the Frequency Key is pressed while the LCD Setting
option is highlighted in the Tools Menu , a
diagnostic screen showing the current frequency, power
level, and output voltage will appear after a countdown�
Press the Main Menu Key to return to the Main Menu�
Audio Setting
Turn the beeping current signal ON or OFF from the
Audio option found in the Tools Menu � Press
the Select Key to toggle between ON and OFF� The
audio setting will default to ON after the ST‑33Q is
turned OFF�
Auto‑shutdown Setting
The ST‑33Q has an auto‑shutdown feature that will shut
off the device if a key is not pressed within a set time�
The ST‑33Q can be set to auto‑shutdown in 1 hour, 2
hours, 4 hours, or never (See Figure 25)�
Figure 25 – Setting Auto‑shutdown Intervals
After selecting auto‑shutdown from the Tools Menu
, the ST‑33Q will cycle through the auto‑shutdown
intervals� Press the Main Menu Key to exit and to
save the selection� During auto‑shutdown, press any
key on the keypad to restart the countdown�
Frequencies
Select the Frequencies option from the Tools
Menu to exclude default frequencies from the
active frequency list�The ST‑33Q lists active frequencies
in the Main Menu for frequencies used most often and
for frequencies that may require quick access� The
ST‑33Q also lists frequencies in the Frequencies Menu

16 - English
SeekTech®ST-33Q
which contains all default and user‑defined frequencies�
Select frequencies within the Frequencies Menu to
appear in the Main Menu list� Deselect frequencies in
the Main Menu list to appear in the Frequencies Menu�
Use the Up and Down Arrow Keys to highlight a
frequency and press the Select Key to turn it ON
or OFF� When enabled, a frequency will show an arrow
icon and will appear in the top level list of the Main
Menu� When disabled, the frequency will show an “X”�
User‑defined Frequencies
The ST‑33Q can accept 40 custom, user‑defined
frequencies that can be used in either Direct Connect
Mode or Inductive Clamp Mode� A user‑defined
frequency can be unselected on either list within a
mode without affecting the other mode�
Figure 26 – User‑defined Frequency Option
Select the User‑defined Frequency option
after selecting the Frequencies option from
the Tools Menu to add custom user‑defined or
factory‑installed frequencies (See Figure 26)�
The ST‑33Q will accept user‑defined frequencies
from 10 Hz to 490 kHz for North America models� For
European models, the ST‑33Q will accept user‑defined
frequencies from 10 Hz to 95 kHz� See the last page of
this Operator’s Manual for a list of frequencies used by
common manufacturers�
Adding a User‑defined Frequency
To add a user‑defined frequency, select the User‑defined
Frequency option after selecting the Frequencies
option from the Tools Menu � After
selecting a the User‑defined frequency option, a screen
with six digit placeholders will appear (See Figure 27)�
Figure 27 – User‑defined Frequency Screen
Use the Frequency Key as a Left Arrow Key to move
all the way to the left of the screen to access a drop‑down
list of pre‑stored 3‑digit and 4‑digit frequencies� Use the
Up and Down Arrow Keys to scroll through the list�
When highlighted, press the Select Key to confirm
the selection (See Figure 28)�
Figure 28 – Stored User‑defined Frequencies
Use the Frequency Key and the Power Key as
left and right arrow keys to move through each digit
placeholder� Use the Up and Down Arrow Keys
to increase and decrease the value of each digit� The
ST‑33Q will adjust the output frequency as each digit
is entered� This auto‑adjustment allows the tuning of
the target frequency for maximum signal at the receiver�
Press the Select Key to confirm the frequency once
entered�
After pressing the Select Key , the ST‑33Q will add the
user‑defined frequency to the user‑defined frequency list
and the frequency will automatically appear, selected
for use, in the Main Menu� If enabled, user‑defined
frequencies will show a “+ sign” next to it in the Main
Menu (See Figure 29)�
Figure 29 – Enabled User‑defined Frequency
Editing a User‑defined Frequency
To edit a user‑defined frequency, press the Main Menu
Key to access the top‑level menu� Use the Up and
Down Arrow Keys to scroll to the user defined
frequency that requires editing� When highlighted, press
the Frequency Key �
If the frequency that requires editing does not appear
in the top‑level menu, select the Frequencies option
from the Tools Menu � Select the
User‑defined Frequency option and use the Up
and Down Arrow Keys to scroll to the frequency that

English - 17
SeekTech®ST-33Q
requires editing� When highlighted, press the Frequency
Key �
When the editing screen appears, use the Up and Down
Arrow Keys to edit each digit� When a user‑defined
frequency has been edited, it will also appear as edited
in the mode enabled�
Deleting a User‑defined Frequency
To delete a user‑defined frequency, press the Main
Menu Key to access the top‑level menu� Use the Up
and Down Arrow Keys to scroll to the user defined
frequency that requires editing� When highlighted, press
the Frequency Key �
If the frequency that requires deleting does not appear
in the top‑level menu, select the Frequencies option
from the Tools Menu � Select the
User‑defined frequency option and use the Up
and Down Arrow Keys to scroll to the frequency
that requires deleting� When highlighted, press the
Frequency Key �
When the editing screen appears, use the Up and Down
Arrow Keys to change each digit to zero� When
each digit has been changed to zero, press the Select
Key to delete the frequency from both the Direct
Connect Mode and the Inductive Clamp Mode�
Odometer
Select the Odometer option from the Tools Menu
to make changes used for system diagnosis or
to access operations data (See Figure 30)�
Figure 30 – Odometer Option
When selected, the Odometer option will show
the number of hours each frequency has been used or
the number of times each frequency has been selected
for actual use� The Odometer option will also
display the total time spent in each mode, minimum
and maximum voltages encountered, and the amount
of time spent at various power levels�
Use the Frequency Key and the Power Key as left
and right arrow keys to toggle the Odometer between a
list of system values and a list of frequencies showing
the amount of time the ST‑33Q has logged on each
frequency and in various mode� Press the Main Menu
Key to exit the Odometer option �
NOTE
The Factory Reset will not reset the Odometer
stored values.
Information Menu
Access the Information Menu from the Main Menu
(See Figure 31).
Figure 31 – Information Menu
Select the Information Menu to view the following:
• The version of software included in the ST‑33Q
• The boot‑load version
• Maximum frequency set
Reset to Factory Default
From the Information screen, press the Select Key to
bring up the option to restore the ST‑33Q to the default,
factory settings (See Figure 32).
Figure 32 – Reset to Factory Default Screen
To reset the ST‑33Q to the factory default settings, use
the Up and Down Arrow Keys to highlight the
Factory Reset option and press the Select Key
� Note that restoring the factory default settings will
not erase user‑defined frequencies created and stored
on the ST‑33Q�
To erase all user‑defined frequencies, highlight the
second option in the Factory Reset Menu and
press the Select Key �
To exit the Factory Reset Screen without making
changes, use the Up and Down Arrow Keys to
highlight the icon and press the Select Key or
press the Main Menu Key �

18 - English
SeekTech®ST-33Q
Helpful Hints
• As a general guideline, using lower frequencies
with the least amount of current and a clear signal
will produce best locating results� Start with a low
frequency if tracing long distances or when receiving
too much bleed‑over onto other utilities�
• The ST‑33Q will generate frequencies as low as 128
Hz in Direct Connect Mode� The ST‑33Q will allow
custom frequencies as low as 10 Hz�
• In general, 8 kHz offers a good starting point when
using the ST‑33Q in Direct Connect Mode� When
using Inductive Mode, 33 kHz will likely be the best
starting frequency�
• The ST‑33Q will generate frequencies as high as
490 kHz (95 kHz in the European version)� High
frequency signals are especially valuable when
tracing a line with interruption (such as a gasket or
damaged insulation)� Unlike low frequency signals,
high frequency signals can “jump” some barriers and
continue without appreciable dissipation�
• When using Inductive Clamp Mode, use higher
frequencies since the signal must overcome
additional resistance�
Cleaning Instructions
WARNING
Disconnect all cords and cables and remove batteries
prior to cleaning the ST‑33Q to reduce the risk of electrical
shock.
Do not use liquid or abrasive cleaners on the ST‑33Q�
Clean the ST‑33Q with damp cloth� Only clean screen
with cleaners approved for use on LCD screens� Do not
allow any liquid to enter the ST‑33Q�
Accessories
WARNING
The following accessories have been designed for use
with the ST‑33Q. Other accessories may become hazardous
when used with the ST‑33Q. To reduce the risk of serious
injury, only use accessories specifically designed and
recommended for use with the ST‑33Q.
Table 5
SeekTech ST‑33Q Accessories
Cat # US Cat # EU Description
21893 21893 RIDGID SeekTech SR‑20
22163 30123 RIDGID SeekTech SR‑60
20973 20973 Inductive Clamp
Transport and Storage
Keep the equipment indoors or well‑covered in wet
weather� Store the ST‑33Q in a locked area, out of
the reach of children and people unfamiliar with its
operation� This equipment could cause serious injury in
the hands of untrained users� Do not expose to heavy
shocks or impacts during transport�
Remove batteries before shipping and before storing for
extended periods�
Store electrical devices in a dry place to reduce risk
of electrical shock� Store in temperatures from 14°F to
158°F [−10°C to 70°C]� Store the unit away from heat
sources such as radiators, heat registers, stoves, and
other products (including amplifiers) that produce heat�

English - 19
SeekTech®ST-33Q
Service and Repair
WARNING
Improper service or repair can make the ST‑33Q unsafe to
operate.
Service and repair of the SeekTech ST‑33Q must
be performed by a RIDGID Independent Authorized
Service Center�
For information on your nearest RIDGID Independent
Service Center or any service or repair questions:
• Contact your local RIDGID distributor�
• Visit www�RIDGID�com or www�RIDGID�eu to find
your local Ridge Tool contact point�
• Contact Ridge Tool Technical Service Department at
rtctechservices@emerson�com or, in the U�S� and
Canada, call 800‑519‑3456�
Disposal
Parts of the unit contain valuable materials that can
be recycled� There are companies that specialize
in recycling that may be found locally� Dispose of
the components in compliance with all applicable
regulations� Contact your local waste management
authority for more information�
For EC countries: Do not dispose of
electrical equipment with household
waste!
According to the European Guideline
2002/96/EC for Waste Electrical
and Electronic Equipment and its
implementation into national legislation,
electrical equipment that is no longer usable must
be collected separately and disposed of in an
environmentally‑correct manner�

20 - English
SeekTech®ST-33Q
Table 6
Troubleshooting
Problem Solution
ST‑33Q will not turn ON
Check orientation of batteries
Check that batteries are charged
Check that the battery contacts are clean and unbent
Receiver will not pick up the line
transmitter’s signal
Check that the circuit is complete
Check that the transmitter is in the correct mode� See the descriptions for
Direct Connect Mode, Inductive Mode, and Inductive Clamp Mode�
Check that the receiver and the ST‑33Q are set to the same frequency (for
example, some receivers will use 93,622�9 Hz or 93,696 Hz instead of 93
kHz)� Create custom frequencies to exactly match the receiver�
Ensure the proper functions are activated on the receiver�
Press up the Up Arrow Key to increase the power output
Ensure adequate grounding and improve if possible
LCD screen completely dark or light
when the ST‑33Q is ON
Power the ST‑33Q OFF and ON
Check and adjust LCD brightness from the Tools Menu
If exposed to excessive heat or sunlight, allow the ST‑33Q to cool
ST‑33Q appears stuck in one mode
and will not reset
Remove and replace or recharge batteries�
Apply external power source
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