User Manual

RPM/Speed Sensor (Electric)
In electric cars and trucks, the rpm sensor is mounted near the spur gear and gets rpm readings directly
from that gear. A conversion in the transmitter can be programmed to give speed in mph or rpm. See the
Telemetry Speed Unit section on rpm and speed for more details. Because of the diverse types of electric
vehicles, it may be necessary to fabricate a mount from Lexan for some types of vehicles.
RPM/Speed Sensor Installation (Electric)
• Determine the best method to mount the sensor near the spur gear. The face of the sensor must face
the side of the gear. A mount can be fabricated from Lexan and taped in place using servo tape then
bent to allow installation in most applications.
• Mount the rpm sensor such that the sensor is 1/8” from the side of the gear.
• If the gear is non-reective, place a reective decal on the gear so it passes between the sensor and
the flywheel when rotated. If the gear is reflective, place a flat black decal on the gear so it passes
between the sensor and the gear when rotated.
• Plug the sensor into the RPM port in the SR3300T receiver.
Temperature Sensor (Nitro)
An optional temperature sensor loop is needed that wraps around the head of the engine to monitor head
temperature. This is useful in tuning engines and in preventing damaging over-lean runs.
Temperature Sensor Installation (Nitro)
• Install the loop as shown around the cylinder of the engine. It is best to place the sensor near the point
at which the head meets the cylinder to get the most accurate consistent readings.
• Plug the temperature sensor into the port marked TEMP in the SR3300T receiver.
The Telemetry screen on the DX3S should now display the room temperature.
Temperature Sensor (Electric)
An optional Thermister-type temperature sensor is needed in the electric system that can be taped to the
battery or motor to monitor real-time temperature. Transparent tape can be used to attach the sensor for
temperatures up to approximately 250°F. High temperature tape is needed for temperatures exceeding
250°F.
Temperature Sensor Installation (Electric)
• Tape the temperature sensor to the desired area you wish to monitor (normally the batteries or motor).
• Plug the temperature sensor into the port marked TEMP in the SR3300T receiver.
The Telemetry screen on the DX3S transmitter should now display room temperature.
Tips on Using 2.4GHz Systems
Your DSM equipped 2.4GHz system is intuitive to operate, functioning nearly identically to FM systems.
Following are a few common questions from customers:
1. Q: Which do I turn on first, the transmitter or the receiver?
A: It doesn’t matter, although it is suggested to turn the transmitter on first. If the receiver is turned
on first, all channels will be driven to the failsafe position set during binding. When the transmitter
is then turned on, the transmitter scans the 2.4GHz band and acquires an open channel. Then the
receiver that was previously bound to the transmitter scans the band and finds the GUID (Globally
Unique Identifier code) stored during binding. The system then connects and operates normally.
If the transmitter is turned on first, the transmitter scans the 2.4GHz band and acquires an open
channel. When the receiver is turned on, the receiver scans the 2.4GHz band looking for the
previously stored GUID. When it locates the specific GUID code and confirms uncorrupted repeat-
able packet information, the system connects and normal operation takes place. Typically this takes
2 to 6 seconds.
2. Q: Sometimes the system takes longer to connect and sometimes it doesn’t connect at all. Why?
A: In order for the system to connect (after the receiver is bound), the receiver must receive a large
number of continuous (one after the other) uninterrupted perfect packets from the transmitter. This
process is purposely critical of the environment ensuring that it’s safe to drive when the system
does connect. If the transmitter is too close to the receiver (less than 4 feet) or if the transmitter is
located near metal objects (inside or around a pit trailer, metal transmitter case, the bed of a truck,
the top of a metal work bench, etc.) connection will take longer. In some cases connection will
not occur as the system is receiving reflected 2.4GHz energy from itself and is interpreting this as
unfriendly noise. Moving the system away from metal objects or moving the transmitter away from
the receiver and powering the system up again will enable a connection to occur. This only happens
during the initial connection. Once connected the system is locked, and should a loss of signal
occur (failsafe), the system connects immediately (4ms) when signal is regained.
3. Q: I’ve heard that the DSM system is less tolerant of low voltage. Is this correct?
A: The SR3300T has an operational voltage range of 3.2 to 9.6 volts. With most systems this is not a
problem as in fact most servos cease to operate at around 3.8 volts. When using multiple high-
current draw servos with a single or inadequate battery/power source, heavy momentary loads
can cause the voltage to dip below this 3.2-volt threshold causing the entire system (servos and
receiver) to brown out. When the voltage drops below the low voltage threshold (3.2 volts), the
receiver must reboot (go through the start-up process of scanning the band and finding the
transmitter) and this can take several seconds.
4. Q: Sometimes my receiver loses its bind and won’t connect, requiring rebinding. What happens if the
bind is lost during use?
A: The receiver will never lose its bind unless it’s instructed to. It’s important to understand that
during the binding process the receiver not only learns the GUID (code) of the transmitter but the
transmitter learns and stores the type of receiver that it’s bound to.
If the system fails to connect, more than likely the transmitter is near conductive material
(transmitter case, truck bed, etc.) and the reflected 2.4GHz energy is preventing the system from
connecting. (See #2 above)
Non-Warranty Repairs
Should your repair not be covered by warranty the repair will be completed and payment will be required without notification or estimate of the
expense unless the expense exceeds 50% of the retail purchase cost. By submitting the item for repair you are agreeing to payment of the repair
without notification. Repair estimates are available upon request. You must include this request with your repair. Non-warranty repair estimates
will be billed a minimum of ½ hour of labor. In addition you will be billed for return freight. Please advise us of your preferred method of payment.
Horizon accepts money orders and cashiers checks, as well as Visa, MasterCard, American Express, and Discover cards. If you choose to pay
by credit card, please include your credit card number and expiration date. Any repair left unpaid or unclaimed after 90 days will be considered
abandoned and will be disposed of accordingly. Please note: non-warranty repair is only available on electronics and model engines.
Electronics and engines requiring inspection or repair should be shipped to the following address:
Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822
All other Products requiring warranty inspection or repair should be shipped to the following address:
Horizon Product Support
4105 Fieldstone Road
Champaign, Illinois 61822
Please call 877-504-0233 or e-mail us at [e-mail] with any questions or concerns regarding this product or warranty.
European Union:
Electronics and engines requiring inspection or repair should be shipped to one of the following addresses:
FCC Information
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Caution: Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to
operate the equipment.
This product contains a radio transmitter with wireless technology which has been tested and found to be compliant with the applicable regulations
governing a radio transmitter in the 2.400GHz to 2.4835GHz frequency range.
The associated regulatory agencies of the following countries recognize the noted certifications for this product as authorized for sale and use:
Instructions for Disposal of WEEE by Users in the European Union
This product must not be disposed of with other waste. Instead, it is the user’s responsibility to dispose of their waste equipment by handing it over
to a designated collection point for the recycling of waste electrical and electronic equipment. The separate collection and recycling of your waste
equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and
the environment. For more information about where you can drop off your waste equipment for recycling, please contact your local city office, your
household waste disposal service or where you purchased the product.
Warranty Period
Exclusive Warranty- Horizon Hobby, Inc., (Horizon) warranties that the Products purchased (the “Product”) will be free from defects in materials and
workmanship for a period of 1 year from the date of purchase by the Purchaser.
Limited Warranty
(a) This warranty is limited to the original Purchaser (“Purchaser”) and is not transferable. REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS
WARRANTY IS THE EXCLUSIVE REMEDY OF THE PURCHASER. This warranty covers only those Products purchased from an authorized Horizon dealer.
Third party transactions are not covered by this warranty. Proof of purchase is required for warranty claims. Further, Horizon reserves the right to change or
modify this warranty without notice and disclaims all other warranties, express or implied.
(b) Limitations- HORIZON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT NON-INFRINGEMENT, MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCT. THE PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED THAT THE
PRODUCT WILL SUITABLY MEET THE REQUIREMENTS OF THE PURCHASER’S INTENDED USE.
(c) Purchaser Remedy- Horizon’s sole obligation hereunder shall be that Horizon will, at its option, (i) repair or (ii) replace, any Product determined by
Horizon to be defective. In the event of a defect, these are the Purchaser’s exclusive remedies. Horizon reserves the right to inspect any and all equipment
involved in a warranty claim. Repair or replacement decisions are at the sole discretion of Horizon. This warranty does not cover cosmetic damage or
damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or modification of or to any part of the Product. This warranty does not
cover damage due to improper installation, operation, maintenance, or attempted repair by anyone other than Horizon. Return of any goods by Purchaser
must be approved in writing by Horizon before shipment.
Damage Limits
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL
LOSS IN ANY WAY CONNECTED WITH THE PRODUCT, WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY. Further, in no event shall the liability of Horizon exceed the individual price of the Product on which liability is asserted. As Horizon has no
control over use, setup, final assembly, modification or misuse, no liability shall be assumed nor accepted for any resulting damage or injury. By the act of
use, setup or assembly, the user accepts all resulting liability.
If you as the Purchaser or user are not prepared to accept the liability associated with the use of this Product, you are advised to return this Product
immediately in new and unused condition to the place of purchase.
Law: These Terms are governed by Illinois law (without regard to conflict of law principals).
Safety Precautions
This is a sophisticated hobby Product and not a toy. It must be operated with caution and common sense and requires some basic mechanical ability.
Failure to operate this Product in a safe and responsible manner could result in injury or damage to the Product or other property. This Product is not
intended for use by children without direct adult supervision. The Product manual contains instructions for safety, operation and maintenance. It is essential
to read and follow all the instructions and warnings in the manual, prior to assembly, setup or use, in order to operate correctly and avoid damage or injury.
Questions, Assistance, and Repairs
Your local hobby store and/or place of purchase cannot provide warranty support or repair. Once assembly, setup or use of the Product has been started,
you must contact Horizon directly. This will enable Horizon to better answer your questions and service you in the event that you may need any assistance.
For questions or assistance, please direct your email to [e-mail], or call 877.504.0233 toll free to speak to the Product Support
department.
Inspection or Repairs
If this Product needs to be inspected or repaired, please call for a Return Merchandise Authorization (RMA). Pack the Product securely using a shipping
carton. Please note that original boxes may be included, but are not designed to withstand the rigors of shipping without additional protection. Ship via a
carrier that provides tracking and insurance for lost or damaged parcels, as Horizon is not responsible for merchandise until it arrives and is accepted at
our facility. A Service Repair Request is available at www.horizonhobby.com on the “Support” tab. If you do not have internet access, please include a letter
with your complete name, street address, email address and phone number where you can be reached during business days, your RMA number, a list of the
included items, method of payment for any non-warranty expenses and a brief summary of the problem. Your original sales receipt must also be included
for warranty consideration. Be sure your name, address, and RMA number are clearly written on the outside of the shipping carton.
Warranty Inspection and Repairs
To receive warranty service, you must include your original sales receipt verifying the proof-of-purchase date. Provided warranty conditions have been met,
your Product will be repaired or replaced free of charge. Repair or replacement decisions are at the sole discretion of Horizon Hobby.
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