Gatekeeper Systems W9460 Remote Controlled Locking Wheel User Manual
Gatekeeper Systems (HK) Ltd. Remote Controlled Locking Wheel
User Manual

®

Le present appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence.
(1) This device may not cause harmful interference, and (2) This device must accept any interference 
The Gatekeeper Wheel
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
CartControl User Manual                   17
INSTRUCTIONS TO THE USER FOR FCC
-
received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15  
of the FCC Rules. These limits are designed to provide a reasonable protection against harmful interference in a  
residential installation. This equipment generates, uses, and can radiate radio frequency energy and if not installed  
and used in accordance with the instructions, may cause harmful interference to radio communications. However,  
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful 
interference to radio or television reception, which can be determined by turning the equipment off and on, the user  
is encouraged to try to correct the interference by one or more of the following measures:
· Reorient or relocate the receiving antenna.
· Increase the separation between the equipment and receiver.
· Connect the equipment into an outlet or a circuit different from that to which the receiver is connected.
· Consult the dealer or an experienced radio/TV technician for help.
Information for Canadian Users (IC Notice)
Operation is subject to the following two conditions: (1) This device may not cause interference, and (2) this device 
must accept any interference, including interference that may cause undesired operation of the device.
Any changes or modifications not expressly approved by the party responsible for compliance could void user’s 
authority to operate the equipment.
FCC Declaration of Conformance
Product devices comply with FCC Part 15.
The socket-outlet shall be installed near the equipment and shall be easily accessible.
le socle de prise de courant doit être installé à proximité du matériel et doit être aisément accessible.
This device complies with Industry Canada licence-exempt RSS standard(s).
L'exploitation est autorisee aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit accepter tout brouillage radioelectrique subi, meme si le brouillage est 
susceptible d'en compromettre le fonctionnement.

Table Of Contents        
    Introduction                1
    System Overview              2
    System Components              3     
   Customer Awareness Component       3
   Equipment        4
    System Operation              6    
   Unlocking Carts       6
   Master Unlock Procedure      7
   Changing CartKey Battery          7
    System Maintenance              8
    Troubleshooting               10
   System Component:  CentralTransmitter    10
   System Component:  The Gatekeeper wheel   11
   System Component:  The Gatekeeper wheel   12
   System Component:  CartKey        13
    Service                  13
    Customer Responsibilities            14
    Technical Specifications            15
    Cart Containment Log             16, 17
The specifications and information regarding the products in this manual are subject to change  
without notice. All statements, information, and recommendations in this manual are believed to  
be accurate but are presented without warranty of any kind, express or implied. Users must take  
full responsibility for their application of any products.
Gatekeeper Systems CartControl Shopping Cart Containment System User Manual
Copyright © 2010 Gatekeeper Systems Inc.
All Rights Reserved.
                    CartControl User Manual

CartControl User Manual                   01
INTRODUCTION          
To Our Valued Customers:
Thank you for allowing us to install the Gatekeeper Systems CartControl Shopping Cart Contain-
ment system at your store. The CartControl system is the most technologically advanced and user-
friendly cart containment system on the market. We are confident that it will dramatically improve 
your store’s existing efforts to keep shopping carts on the premises. 
In addition to providing the best cart containment system available, it is our aim to provide you with 
unparalleled customer service. Gatekeeper Systems offers a 24-hour toll-free customer service line 
as well as a nationwide network of field representatives and service technicians to handle any service 
issues. Should you have any questions or need to schedule a field service call, please call our  
toll-free 24-hour customer service number.
  GATEKEEPER SYSTEMS 24-HOUR 
  CUSTOMER SERVICE HOTLINE
  Toll Free (888) 808-9433    Press Option “1”
  Between the hours of 7 p.m. CST and 7 a.m. CST, select Option #5
  to activate our emergency dispatch service.vice.
The CartControl User Manual is designed to provide store personnel with a general information 
source regarding the shopping cart containment system. Making this manual available to all new 
employees who have not yet worked with the system will help ensure proper operation and added 
longevity. Properly trained employees are an integral part of the system’s operation.
The manual also contains technical information and is a good place to refer maintenance work-
ers and contractors with questions about the system. If questions concerning the system arise and 
answers are not available in this manual, please call the toll-free number to speak with a Gatekeeper 
Customer Service Representative. Never hesitate to contact Gatekeeper with your questions about 
the system.
We encourage your store to designate an employee who can act as a “contact person”. Gatekeeper 
will ask for this person by name when scheduling service or performing routine preventative mainte-
nance calls. Gatekeeper will also train this individual in additional system functions and troubleshoot-
ing procedures.

SYSTEM OVERVIEW                 
According to retail industry research, a shopping cart is stolen, damaged, or destroyed every  
ninety seconds in the United States, costing retailers approximately $180 million annually.  
The CartControl system combines a digital locking signal, perimeter antenna, and Gatekeeper’s  
electronically activated self-locking shopping cart wheel to provide the most effective and  
easy-to-operate cart containment solution available. The system prevents carts from leaving  
store premises, saving retailers thousands in costs associated with replacing, retrieving,  
and repairing carts.
02                     CartControl User Manual

SYSTEM COMPONENTS        
Customer Awareness Component
Every CartControl shopping cart containment system includes a Customer Awareness Component.  
The items included in this package are a critical part of the system’s success.
 Customer Awareness Inserts
  Prior to installation, Customer Awareness Inserts were sent  
  to your store and distributed. These fliers were given to each  
  customer to inform them of the introduction of the new shopping  
  cart containment system. It is important to make sure customers  
  are well informed about the presence of the system.
  Cart Signs
  Cart signs are installed on each shopping cart and serve as a  
  reminder for new and existing customers that carts will lock if  
  they are removed from the premises.
  Parking Lot Signs
  Large parking lot signs serve as a general reminder that the  
  system is active. Parking lot signs are placed near major lot  
  exits as well as just outside the store. 
  Perimeter Striping
  A 9-inch yellow stripe has been painted along the designated  
  store boundaries. These lines serve as the final reminder to  
  customers that their shopping carts will lock if they attempt to  
  cross the perimeter boundary. The stripe includes distinctive  
  “no-cart” symbols.
CartControl User Manual                   03
M-8008
Our shopping carts will lock if taken beyond 
the parking lot perimeter. While distinctive yellow 
lines mark normal exit s, the entire lot perimeter is protected.
Nuestros carritos no funcionan fuera de los limites del estacionamiento. 
Aunque las lineas amarillas distintivas indican las salidas normales, todo el 
perimetro del estacionamiento esta protegido.   
Attention
Shoppers!
´

SYSTEM COMPONENTS        
Equipment
CentralTransmitter 
The CentralTransmitter is located in an area that is secure, has adequate air flow, is out  
of harm’s way, and accessible for service. Typically, this area is found near the receiving  
area at the rear of the store. The CentralTransmitter sends the locking signal through the  
perimeter antenna which defines the locking boundary.  Additionally, some locations  
utilize an unlock boundary.  The CentralTransmitter also sends the unlocking signal  
through the perimeter antenna which defines the unlocking boundary. Once installed  
and plugged directly in to a 110-volt outlet or Universal Power Supply (UPS), the  
CentralTransmitter rarely requires service.
CentralTransmitter front panel detail:
      To prevent fire or shock hazard, do not expose the 
      CentralTransmitter to rain or moisture. 
04                     CartControl User Manual
• Please do not open the CentralTransmitter unless you are expressly told to do so by a Gatekeeper representative.
• Never disconnect the power supply.  • If you require service, please contact Gatekeeper Systems.

SYSTEM COMPONENTS        
Equipment, continued...
Perimeter Antenna 
The signal generated by the CentralTransmitter 
is carried around the designated store perimeter 
by a small, embedded cable known as the  
“Perimeter Antenna”. This antenna is embedded in a 1/4” wide by 1” deep saw cut around  
the parking lot which is sealed using a weatherproof sealant. The location of the perimeter  
antenna determines the boundary where carts will lock. The perimeter boundary is typically  
identified by a thick, painted yellow line found at all parking lot exits.
The Gatekeeper Wheel
Each shopping cart is equipped with Gatekeeper’s locking wheel. Inside each  
wheel is a signal receiver and locking mechanism. The receiver is factory  
programmed to listen for the locking or unlocking signals emitted from the  
perimeter antennas. The Gatekeeper wheel also accepts a locking or unlocking  
signal from a CartKey remote control. 
Anti-Tilt Bar
Each shopping cart is also equipped with an Anti-Tilt Bar. This is typically  
installed on the rear wheel on the opposite side of the locking wheel. The  
Anti-Tilt Bar limits the cart from being tilted back. If the cart is tipped back, 
the Anti-Tilt Bar will drag on the ground, making the cart extremely difficult  
to push.   
CartKey
The CartKey is a handheld device used by store employees to lock or  
unlock Gatekeeper wheels. The touch pad on the front of the CartKey has two  
buttons labeled “Lock” and “Unlock”. Use the “Unlock” button to unlock  
carts that have locked wheels. The “Lock” button can be used for different  
purposes, such as locking carts stored overnight in outdoor cart corrals, as  
well as to test wheels for operation. If the battery in the CartKey runs low,  
the low-battery indicator light (found in the upper left-hand corner on the  
front panel of the CartKey) will remain lit. Care should always be taken not  
to drop or otherwise damage the CartKeys. Gatekeeper recommends that  
you keep at least one CartKey in a secure location at all times in order to  
avoid losing or temporarily misplacing all CartKeys.
CartControl User Manual                   05

SYSTEM OPERATION        
Once installed, the CartControl system is easy to operate and requires very little technical mainte-
nance. Shopping carts will perform just as they did before the system was installed unless a cus-
tomer attempts to go beyond the store perimeter. If a customer pushes a cart to the designated 
perimeter, the Gatekeeper wheel on their shopping cart will lock—making the cart extremely difficult 
to move. Customers will usually take their merchandise and leave the cart right where it locked.  
Store employees responsible for retrieving carts can pull the abandoned shopping cart back to the 
unlocking signal boundary and the Gatekeeper wheel will automatically unlock. They can also bring a 
CartKey with them to unlock any locked shopping carts.
UNLOCKING CARTS - locations utilizing an unlock boundary
1. Pull the locked shopping cart to the unlocking signal boundary
2. Check to see that the wheel unlocks by gently rolling the shopping cart. Typically one can hear  
    the locking and unlocking mechanism operating in the wheel so the operator can wait until the  
    motor inside the wheel has stopped running which indicates the end of the lock or unlock cycle.  
3. Pull the shopping cart away from the locking and unlocking signal boundaries.
4. The shopping cart will immediately lock once it hears the locking signal so care must be  
    taken in handling the carts.
MANUALLY UNLOCKING CARTS WITH A CARTKEY – all locations
1. Hold the CartKey 18-inches to 48-inches away from the Gatekeeper wheel. For best results,  
    angle the bottom of the CartKey so it is oriented towards the Gatekeeper wheel (SEE DIAGRAM  
    BELOW).
2. Point the CartKey at the Gatekeeper wheel and depress the “Unlock” button. Once unlocked,  
    the Gatekeeper wheel will remain unlocked for ten (10) seconds even if left at the perimeter  
    boundary. 
3. Roll the cart(s) away from the perimeter boundary within the ten-second period. 
TIP: If the Gatekeeper wheel does not unlock after depressing the “Unlock” button on the  
CartKey, you can reset the Gatekeeper wheel by performing the following steps:
1. Hold the CartKey 18-inches to 48-inches away from the Gatekeeper wheel. For best results,  
    angle the bottom of the CartKey so it is oriented towards the Gatekeeper wheel.
2. Point the CartKey at the Gatekeeper wheel and depress the  
    “Lock” button. This will reset the Gatekeeper wheel to  
    accept the unlock signal.
3. Next, depress the “Unlock” button. This should unlock the   
    Gatekeeper wheel. If this fails, notify the store manager  
    or contact person.
06                     CartControl User Manual
CartKey should be held so that
the bottom is angled towards
the Gatekeeper wheel
18 to 48
inches
away
from
wheel

SYSTEM OPERATION       
MASTER UNLOCK PROCEDURE
If you need to simultaneously unlock numerous carts located near the perimeter boundary,  
the CentralTransmitter features a master unlock mode to enable unlocking and cart retrieval  
without the use of a CartKey. When activated, this feature will stay in effect for thirty (30)  
seconds. After thirty-seconds has passed, normal operation will resume. 
This feature requires at least two employees, one on the outer perimeter, and one at the  
CentralTransmitter. Once the needed personnel are in place, initiate the master unlock mode  
by depressing the silver button located on the front of the CentralTransmitter panel. All carts in  
the vicinity of the perimeter antenna will receive an unlock signal and can be retrieved within  
thirty-seconds. While this is a convenient option, it does present a period during which carts  
are unprotected. Please remember that the added convenience presents added exposure.
CHANGING CARTKEY BATTERY
CartKey batteries will need to be replaced from time to time during the life of the system. If you are 
having difficulty unlocking or locking the Gatekeeper wheel you may need to replace the battery. 
In order to replace your CartKey battery, perform the following steps. You will need a replacement 
CR123A 3V lithium battery. These are standard lithium batteries like the kind used in most digital 
cameras. You will also need a coin in order to open the battery cover (a quarter works best).
STEPS
1. Turn the CartKey over so you are looking at the side opposite the front panel. You will see a circular cover with a slot.  
    Place the CartKey on a flat surface.
2. Insert your coin into the slot and turn counterclockwise until the battery cover pops up. 
3. Remove the battery cover and set aside. 
4. Inside the CartKey, you will see a nylon strap holding the battery in place. Pull up on the nylon strap until the battery pops out. 
5. Insert the new battery so it lies on top of the nylon strap (this will ensure easy removal the next time you need to change the battery).    
    Make sure to align the “+” and “—” connectors on the battery with the “+” and “—” indicators inside the CartKey. Insert the “—” end  
    first and then push down on the battery until it snaps into place. 
6. Once the new battery is in place, fold the remaining end of the nylon strap back over the battery. 
7. Take the battery cover and place it back on the CartKey, making sure to line up the notches on the battery cover with the  
    notches on the CartKey opening. Push down on the battery cover until it is level with the surface of the CartKey. Turn the  
    battery cover clockwise. 
8. Insert your coin into the slot and turn clockwise until the battery cover clicks into place.
CartControl User Manual                   07

SYSTEM MAINTENANCE            
In order to ensure that the system is operating at peak performance, we  
recommend that you implement the following standard practices.
Perform a visual inspection of the perimeter each day.
Gatekeeper recommends walking the perimeter boundary at the opening of each day to identify any 
parking lot damage or the presence of any potentially damaging activity or objects. Make sure to look 
for potholes or other parking lot degradation that may require maintenance.
Test the system each day.
Gatekeeper recommends testing the perimeter signal at the opening of each day. To check the pe-
rimeter signal, take a CartKey and a shopping cart into the parking lot. Begin at the perimeter anten-
na’s closest point to the store and follow these steps:
  1. Roll the shopping cart to the perimeter line. The Gatekeeper wheel on the shopping  
      cart should lock.
  2. For locations utilizing an unlock boundary – Wait 30 seconds and then pull the shopping  
      cart into the unlock area, making sure the Gatekeeper wheel unlocks.  The wheel should  
      roll freely again.
     All locations – Hold the CartKey 18’ to 48’ away from the Gatekeeper wheel, point the  
               CartKey at the Gatekeeper wheel and depress the unlock button.  The Gatekeeper wheel  
               should roll freely again. The wheel should roll freely again.
  3. Move to another point along the perimeter boundary and repeat steps 1 and 2. Test the    
      cart at four other points along the perimeter.
If during any step the Gatekeeper wheel does not lock, repeat steps 1 and 2. If the problem contin-
ues after three attempts, immediately notify either the store contact person or the store manager.
Retrieve locked carts regularly.
Throughout the day and particularly toward the close of business, carts should be retrieved from the 
perimeter and brought to a cart corral or other collection area. If you are unable to unlock any locked 
wheels, take the locked cart(s) to a secure location until it can be serviced by a Gatekeeper Field 
Service Representative.
Take a weekly cart count.
A cart count should be conducted at least once a week. Monitoring the total number of carts avail-
able on a regular basis makes it easier to gauge the success of the system as well as identify any 
potential problems. A Cart Containment Log is available at the back of this user manual. If your store 
utilizes a cart retrieval service, closely monitor your retrieval numbers and ensure that only carts 
with Gatekeeper wheels are being delivered to your store and that those carts belong to your store.
08                     CartControl User Manual

Lock carts left outside at closing time.
At the close of your business day, Gatekeeper recommends that carts left outside be secured with 
a locked chain. In the event that a chain-locking procedure cannot be implemented, carts can be 
nested and locked using a CartKey. Do not forget to unlock carts before opening the following day.
Never disable the system alarm.
The CentralTransmitter is equipped with an audible alarm. The CentralTransmitter alarm will sound in 
the event that the perimeter antenna is compromised due to malfunction or physical damage. While 
you have the option to disable the audible alarm signal via a switch on the front panel of the Central-
Transmitter, Gatekeeper highly recommends leaving the audible alarm active at all times. An active 
audible alarm will ensure prompt notification in the event of any system malfunction.
Perform regular maintenance.
In order to continue to provide the best possible shopping experience, it is important to make sure 
that your customers remain aware of the system’s presence and function. Gatekeeper recommends 
performing periodic checks to make sure cart signs, parking lot signs, and perimeter boundary 
stripes are still in place, kept clean, and are clearly visible to customers. If you need to replace any 
signage, replacement signs are available for purchase from Gatekeeper Systems.
CartControl User Manual                   09

TROUBLESHOOTING        
This section will help you solve some of the problems that may occur with the system. It also con-
tains technical information and is a good place to refer maintenance workers and contractors with 
questions about the system. If questions concerning the system arise and you cannot solve your 
problem using this manual, call the toll-free number and speak with a Gatekeeper Customer Service 
Representative. Never hesitate to contact Gatekeeper with questions about the system.
The following chart is organized by system component so you can more quickly diagnose and  
solve specific problems.
SYSTEM COMPONENT: CentralTransmitter
Problem      Possible Cause    Solution
Carts not locking at the  Undetermined  
designated perimeter line
10                     CartControl User Manual
Try to lock a shopping cart using a CartKey. If 
the Gatekeeper wheel locks and unlocks prop-
erly, check your CentralTransmitter to verify it is 
plugged in. If you hear the CentralTransmitter 
alarm, immediately contact Gatekeeper Sys-
tems to set-up a service call.
Carts not locking at the  
designated perimeter line
Power outage If the CartControl system power is not on, but 
the store’s power is, make sure that the Cen-
tralTransmitter power cord is plugged into a live 
110 volt AC power outlet. If the store’s power 
is out, the CartControl system will not function 
unless connected to a universal battery backup. 
If the CentralTransmitter is plugged into a live 
outlet and your store’s power is on, contact 
Gatekeeper Customer Service for assistance. 
NEVER UNPLUG THE SYSTEM.
Audible Alarm sounding Cut Perimeter Antenna/
Signal frequency out of 
adjustment
Turn the audible alarm switch to the “Off” posi-
tion. Contact Gatekeeper Customer Service to 
schedule a qualified technician to come out and 
service the CentralTransmitter.
System Alert Light is lit Cut Perimeter Antenna/
Signal frequency out of 
adjustment
Contact Gatekeeper Customer Service to 
schedule a service call.
System is down after 
power surge
Power surge CentralTransmitter is plugged into power sup-
ply but no lights on front panel are illuminated. 
Check to ensure power is live at outlet. You 
can check this by plugging another device into 
the power outlet and determining whether or 
not the outlet is live. If the outlet is live, contact 
Gatekeeper Customer Service to schedule a 
service call. NEVER UNPLUG THE SYSTEM. 

TROUBLESHOOTING        
SYSTEM COMPONENT: Gatekeeper wheel – locations utilizing an unlock boundary
Problem      Possible Cause    Solution
All wheels do not lock   Power outage 
or unlock at perimeter
CartControl User Manual                   11
Check to see if the System Alert Light on the 
CentralTransmitter is illuminated or if an audible 
alarm is sounding. If not, confirm that the Cen-
tralTransmitter power cord is plugged into a live 
outlet or into a backup power supply. If none 
of these conditions exists, notify Gatekeeper 
Customer Service.
All wheels do not lock 
or unlock at perimeter
Damaged antenna Check to see if the System Alert Light on the 
CentralTransmitter is illuminated or if an audible 
alarm is sounding—which indicates that the  
Perimeter Antenna may have been damaged.  
If the System Warning Light is on and/or you 
hear the audible alarm, notify Gatekeeper  
Customer Service.
Wheels will not lock 
or unlock at the perimeter
System failure or cer-
tain wheels not working
Check to see if a wheel will lock or unlock using 
a CartKey. Take a cart to at least two sections 
of the perimeter to determine if wheel will lock 
and unlock.  If wheel does lock or unlock in one 
area, contact Gatekeeper Customer Service. 
When contacting Gatekeeper, take note of any 
construction or anything unusual that may have 
taken place in the store’s vicinity.
Wheels will not unlock  
using the CartKey
The Gatekeeper wheel 
needs to be reset
To reset the Gatekeeper wheel, hold the Cart-
Key 18” to 48” away from the Gatekeeper 
wheel, point the CartKey at the Gatekeeper 
wheel, and depress the “Lock” button. This 
will reset the Gatekeeper wheel to accept the 
unlock signal. Next, depress the “Unlock” but-
ton. This should unlock the Gatekeeper wheel. 
If this fails, notify the store manager or contact 
person.
…Now that we added a page the Table of Contents will need to be updated from page 12 on.
…Now that we added a page, we will not print on the interior covers.  Right now the front and back 
interior covers have printing on them.  In your layout, please adjust since by adding one printed page we 
will actually be adding 4 pages for printing.  Call if you are confused.

TROUBLESHOOTING        
SYSTEM COMPONENT: Gatekeeper wheel – all locations
Problem      Possible Cause    Solution
All wheels do not lock   Power outage 
at perimeter
Check to see if the System Alert Light on the 
CentralTransmitter is illuminated or if an audible 
alarm is sounding. If not, confirm that the Cen-
tralTransmitter power cord is plugged into a live 
outlet or into a backup power supply. If none 
of these conditions exists, notify Gatekeeper 
Customer Service.
All wheels do not lock 
at perimeter
Damaged antenna Check to see if the System Alert Light on the 
CentralTransmitter is illuminated or if an audible 
alarm is sounding—which indicates that the  
Perimeter Antenna may have been damaged.  
If the System Warning Light is on and/or you 
hear the audible alarm, notify Gatekeeper  
Customer Service.
Wheels will not lock 
at the perimeter
System failure or cer-
tain wheels not working
Check to see if a wheel will lock or unlock using 
a CartKey. Take a cart to at least two sections 
of the perimeter to determine if wheel will lock 
and unlock.  If wheel does lock or unlock in one 
area, contact Gatekeeper Customer Service. 
When contacting Gatekeeper, take note of any 
construction or anything unusual that may have 
taken place in the store’s vicinity.
Wheels will not unlock  
using the CartKey
The Gatekeeper wheel 
needs to be reset
To reset the Gatekeeper wheel, hold the Cart-
Key 18” to 48” away from the Gatekeeper 
wheel, point the CartKey at the Gatekeeper 
wheel, and depress the “Lock” button. This 
will reset the Gatekeeper wheel to accept the 
unlock signal. Next, depress the “Unlock” but-
ton. This should unlock the Gatekeeper wheel. 
If this fails, notify the store manager or contact 
person.
12                     CartControl User Manual

CartControl User Manual                   13
TROUBLESHOOTING        
SYSTEM COMPONENT: CartKey
Problem      Possible Cause    Solution
CartKey is not working  Improper reset distance
SERVICE           
Most field service calls are avoidable. In many cases, a quick call to Gatekeeper Customer Service 
will solve the problem. If you have done everything you can and you are still experiencing difficulties, 
please call Gatekeeper and ask to speak with Customer Service.
GATEKEEPER SYSTEMS 24-HOUR
CUSTOMER SERVICE HOTLINE
Toll Free (888) 808-9433 Press Option “1”
In the event that the problem requires onsite service, we will schedule a field service call—usually 
within 48 hours. 24-hour customer service is available via the toll-free number. If you are calling after 
our normal business hours (7 a.m. – 7 p.m. Central Standard Time (CST)) and reach the automated 
attendant, press “5” on your telephone keypad to place an immediate service call.
Test the CartKey on several shopping carts by 
alternately pressing and holding the “Lock” and 
“Unlock” buttons on the CartKey. Attempt to 
lock and unlock wheels while holding the  
CartKey at a variety of distances ranging from 
18” to 48”  away from the Gatekeeper wheel.
CartKey is not working Low/Dead battery If wheels lock at the perimeter boundary and 
you are unable to unlock them using the  
CartKey, it may be necessary to replace the  
battery in the CartKey. See Page 7 of this 
manual for instructions on how to replace  
the CartKey battery.
CartKey is not working Damaged CartKey Attempt to lock and unlock a variety of carts 
using the CartKey. Confirm that the CartKey 
battery is not low or dead. Contact Gatekeeper 
Customer Service to have a replacement  
CartKey shipped to you.

CUSTOMER RESPONSIBILITIES     
Gatekeeper Systems will work with you to ensure the success of the CartControl system. 
There are, however, certain responsibilities that the customer accepts.
The CentralTransmitter remains mounted in a safe and secure fashion. 
Ensuring that the CentralTransmitter is not damaged or altered in any fashion is the customer’s  
responsibility. If you believe adjustments to the CentralTransmitter are required, please contact  
Gatekeeper. Adjusting or modifying the CentralTransmitter will void the system warranty.
The Perimeter Antenna remains properly sealed to withstand traffic and weather. 
Once installed, the Perimeter Antenna becomes part of the property and therefore the responsibility 
of the customer or property owner/manager. In the event that the antenna is damaged for any reason 
other than an obvious installation error, the customer will be charged for repair. Examples of antenna 
damage not covered by warranty include: damage due to parking lot repair, deliberate sabotage, 
unusual forces of nature such as earthquake or flood, or other acts not reasonably considered normal 
operating characteristics of a retailer’s business. You will be supplied with a map of your property 
showing the location of the antenna so you can perform visual inspections or provide to anyone per-
forming work on your property.
Customer notification components are maintained.
The customer is responsible for making sure that shoppers remain aware of the system’s presence 
and function. Gatekeeper recommends performing periodic checks to make sure cart signs, parking 
lot signs, and perimeter boundary stripes are still in place, kept clean, and are clearly visible to cus-
tomers. If you need to replace any signage, replacement signs are available for purchase from Gate-
keeper Systems.
Although difficult, a cart that locks as intended can still be physically removed from your  
premises.
Gatekeeper Systems cannot be held responsible in the event a cart is physically removed from your 
premises. In addition, while both the Gatekeeper wheel and the CartKeys are extremely durable and 
have been proven to stand up to extreme conditions, obvious tampering, malicious damage, or ac-
cidental damage resulting from extreme impact (e.g. collisions between vehicles and system com-
ponents) are outside the bounds of intended use. Gatekeeper regrets that it cannot replace compo-
nents, under warranty, for these kinds of occurrences.
14                     CartControl User Manual

The hub cover is not detachable by user.
3-volt lithium battery.
TECHNICAL SPECIFICATIONS      
The Gatekeeper Wheel
Wheel       Standard 5-inch, non-marring, conductive (anti-static) wheel with 
        anti-static, non-marring rubber tread and sealed precision ball bearings.
Power Source   
Electronic Components  Programmable CMOS (low power consumption)  
        microprocessor.
CentralTransmitter
Microprocessor    Digital circuitry, programmed in the factory and compliant with FCC Part  
        15 (no testing or certification required).
Power Supply     110/220 VAC, 500mA, 50/60 Hz compliant with ANSI/UL 60950 and  
        CAN/CSA C22.2 No. 60950-00. 
Signal Output     Signal frequency is below 9 KHZ (VLF) and complies with FCC Part 15.
Perimeter Antenna
Cable        Either a 3/16 Cross Linked Polyethylene Traffic Loop Detector Wire or a 
        14 gauge (AWG), double-insulated cable, embedded directly into the   
        asphalt via a quarter-inch wide by one-inch deep saw cut.
Lock Signal      The digital signal transmitted is adjustable to be received by all carts    
        within a 3-foot perimeter of the embedded antenna. Signal is adjustable 
        for proper reception at any distance from 2+ feet.
CartKey
Power       Power is supplied via a CR123A, 3 volt, lithium battery identical to the  
        one installed in the Gatekeeper wheel. The battery is easily replaced    
        (see Page 7).
Frequency      Programmed to send a signal below 9KHZ (VLF), to be compliant with  
        FCC Part 15.
CartControl User Manual                   15

CART CONTAINMENT LOG        
Use the following table to log your cart counts and take notes.
Date    Cart Count    Counted By    Notes
16                     CartControl User Manual

CART CONTAINMENT LOG        
Use the following table to log your cart counts and take notes.
Date    Cart Count    Counted By    Notes
CartControl User Manual                   17
