BC 14.12 STS ALTI
Here you can find information about your product. In the “Service” tab you will find FAQs and operating instructions. In the “Accessories” tab you will find compatible accessories for your product.
BC 14.12 ALTI STS VIDEOS
OPERATION MANUAL BC 14.12 ALTI / STS
What is the top speed that can be displayed by the bike computer?
All SIGMA SPORT bike computers can display a maximum speed of 199.8 km/h.
How is the wheel diameter determined?
– Multiply the wheel diameter in mm or cm by 3.14.
– Measure the distance travelled in one complete turn of the wheel.
When am I entitled to make a warranty claim?
You can make a warranty claim in relation to material and workmanship defects. The warranty does not cover batteries, wear-and-tear parts, wear caused by commercial usage, or accidents.You are only entitled to make a warranty claim if the SIGMA product itself has not been opened without authorization and the receipt of purchase is provided.
Where can I get the DATA CENTER evaluation software?
The DATA CENTER software can be downloaded from the SIGMA online shop at www.sigma-data-center.com.
Why is the bike computer displaying no or incorrect speed?
No speed displayed:
– Is the computer correctly fastened into the bracket?
– Are the contacts on the bracket/bike computer oxidized/corroded?
– Has the sleeve been pushed over the magnet?
– Has the clip-on cover (bearing the word SIGMA) been mounted facing outwards (this can possibly make the gap between the magnet and the sensor too large)? – Image of power magnet
– The gap between the magnet and the transmitter is too large max. 5 mm for the standard magnet and max. 12 mm for the power magnet.
– Is the magnet still magnetized? To test, hold the magnet against a metal object. If the magnet is not attracted to the object, it is no longer magnetized.
– For ATS and/or STS bike computers, check the battery status of the speed transmitter.
Incorrect speed displayed:
– Are two magnets attached to the spokes?
– Is the magnet correctly positioned? The magnet should always be positioned parallel and centrally to the transmitter.
– Is the wheel size correctly set? To set the wheel size, please see the operating instructions or the section “Entering the wheel size”.
– For STS speed transmitters and bike computers with automatic second bike detection, is the speed transmitter set to the right bike?
Are additional accessories needed to transmit and evaluate the trip data?
The trip data can be manually input directly into the software or automatically transmitted using the optionally available docking station.
The docking station not only enables you to automatically transmit data but also to conveniently configure your bike computer via your PC.
It can be purchased from the SIGMA online shop at www.sigma-data-center.com or in store from your specialist retailer.
Can I change the battery myself without voiding the warranty?
All SIGMA SPORT bike computers come with a battery compartment, which can be opened and closed by the user with the aid of a coin or a tool (supplied). When changing the battery, always note the position of the O-ring placed on the cover to ensure that the bike computer remains watertight.
Why is my display reacting more and more slowly/getting darker and darker?
The bike computer’s display can change in very high or low temperatures. In very high temperatures, the display gets darker; in very low temperatures, the display reacts more slowly. As soon as the temperature has cooled down or warmed up, the display returns to the original state. The display’s temperature range is -10°C to +50°C.
Maintenance and care of your SIGMA product
Your SIGMA SPORT bike computer is a measuring instrument that must be handled carefully.
After a prolonged period of use, especially if the bike and/or bike computer is/are stored outside, the contacts on both parts should be checked for corrosion. In the event of slight corrosion, you should carefully clean the contacts. Store your bike computer in a cool, dry place. After a prolonged winter break, we advise you to check the batteries in both the computer head and the transmitter(s). Although the power consumption during storage is extremely low, temperature fluctuations can impair the battery quality. When changing the battery, always use branded goods.
When cleaning the bike, remove the bike computer from the bracket. When using a high-pressure washer, avoid spraying the bike computer at close range. Ideal scenario: remove the bike computer from the bracket.
Can I use my bike computer in the rain?
All SIGMA SPORT products are spray-resistant so that they can also be used in the rain. The bike computer is not suitable for use when swimming and is not machine washable!
How do I switch my bike computer from km/h to mph?
Your bike computer can be switched from km/h to mph in the settings menu (under the function “unit”).
Please note that switching from km/h to mph automatically changes the time from 24h format to 12h format. The wheel size is also automatically converted. For information on how to make the switch, please see the operating instructions.
My cable/sensor/bracket is broken/faulty. How can I obtain a replacement?
All SIGMA SPORT bike computer accessories are available on the market. If your retailer does not stock the replacement you can find the product number in the accessories list and order it from your retailer.
What battery does the bike computer come with?
Model name CR 2032 CR 2450 PURE 1/ATS x PURE 1 ATS Sensor x BC 5.12 x BC 8.12 x BC 12.12 x BC 14.12 ALTI x BC 16.12 x BC 8.12 ATS x ATS speed transmitter x BC 12.12 STS x BC 16.12 STS x STS speed transmitter x STS cadence transmitter x BC 509 x BC 1009 x BC 1609 x BC 1009 STS x BC 1609 STS x BC 1909 HR x BC 2209 MHR x BC 2209 TARGA x STS chest belt x ROX 8.0 / 8.1 x ROX 9.0 / 9.1 x R1 heart rate transmitter x
For information on how to change the bike computer/transmitter battery, please see the set-up instructions.
Why do my total values disappear during rides?
The SIGMA SPORT bike computers hide all total values during rides. This prevents you from unnecessarily clicking through the total values while cycling. As soon as there are no speed signals, the total values all reappear.
What is my bike computer’s battery life?
Model name Battery life
PURE 1/ATS 1 PURE 1 ATS Sensor 1,5 BC 5.12 3 BC 8.12 3 BC 12.12 1,5 BC 14.12 ALTI 2 BC 16.12 1 BC 8.12 ATS 1 ATS speed transmitter 1 BC 12.12 STS 1 BC 16.12 STS 1 STS speed transmitter 1 STS cadence transmitter 1 BC 509 2 BC 1009 2 BC 1609 2 BC 1009 STS 1 BC 1609 STS 1 BC 1909 HR 1 BC 2209 MHR 1 BC 2209 TARGA 1 STS chest belt 1 ROX 8.0 / 8.1 1 ROX 9.0 / 9.1 1 R1 heart rate transmitter 1
On using quality batteries for one hour per day or 7,300 km per year at an average speed of 20 km/h (batteries available from SIGMA SPORT®).
Is my TOPLINE 2012 bike computer compatible with the previous docking station?
TOPLINE 2012 bike computers are all ONLY compatible with the dual-sided docking station (ref. no.: 00120). The earlier version of the docking station is solely compatible with models in the TOPLINE 2009 series.
Why is nothing appearing on my TOPLINE 2012 bike computer’s display despite the battery being inserted?
The bike computers come in ‘deep sleep mode’. This prevents undesired energy consumption during storage and ensures that the bike computer offers 100% battery capacity on purchase. Depending on the model, to activate the bike computer, press and hold the bottom button(s) for at least five seconds.
Does the bike computer switch on/off automatically?
All wired SIGMA SPORT bike computers switch on and off automatically.
All STS (Sigma Transmission System) wireless SIGMA SPORT bike computers switch on and off automatically. The bike computer switches on automatically when:
The bike computer is mounted in the bracket and the bike moves (STS devices) or the wheel is rolled (wired devices).
Only the BC 8.12 ATS has to be awoken by pressing a button.
The bike computer switches off automatically after five minutes (sleep mode) providing that no speed signals are received and no buttons are pressed.
How do I attach my bike computer?
You can use the set-up instructions to help you attach your bike computer.
Set-up videos for the individual computers are however also available.
What is the range of my ATS/STS transmitter (speed/cadence)?
STS transmitter range
Speed: 90 cm Cadence: 110 cm Heart rate: 110 cm
ATS transmitter range:
Speed: 70 cm
If the battery in the wireless transmitter is cold or low, the range may shorten.
What are the differences between ATS and STS?
Both wireless transmission systems from SIGMA SPORT have been developed on the same basis, with the intention of offering stable, interference-free transmission.
The key differences between the two transmission systems can be seen in the table below:
Transmission type Analog Digital
Encoding yes yes
Frequency type Low frequency Low frequency
Available channels Speed Speed
Range 70 cm Speed: 90 cm
Cadence: 110 cm
Heart rate: 110 cm
Value updating Yes, trip distance Yes, trip distance and ride time
Can battery-powered lighting interfere with my wireless bike computer?
Various electrical and electronic components or devices can interfere with transmission. This also applies to battery-powered lights, and in particular LED lights. The pulsing of the LED (fast, regular switching on/off of the LED) can generate a frequency, which can in turn interfere with the bike computer’s transmission.
The frequency generated can be isolated within the LED light so that there is no interference with the transmission.
Sigma LED lights are diode suppressed meaning that they do not generate an interfering electromagnetic field. You can resolve problems by attaching the LED light to the handlebars approx. 10 cm from the bike computer.
Why is the bike computer displaying the message "Low Bat" even though the voltage reading shows as 3V?
A pure voltage measurement (e.g. with a multimeter) without any battery load does not provide precise information about the (residual) capacity of a button cell battery. The battery can still have a voltage of 3 V without load but of only 2.4 V when under load, e.g. if the wireless receiver is operating.
How does Sigma determine if a battery is dead?
The bike computer measures the voltage of the button cell under a defined load. It can then calculate the cell’s residual capacity based on the voltage dip under this load. The “Low Bat” message is activated when the total capacity falls below approx. 25%.
Can I also attach my speed transmitter to the rear wheel strut?
Speed transmitters can only be attached to some rear wheel struts and only when using devices with the STS system. The STS system has been designed for the speed transmitter to be attached to the fork.
Attaching the speed transmitter to the bike’s rear wheel strut means that the antennas are unfavorably positioned in relation to one another and that the range is therefore reduced. If the speed transmitter is attached to the rear wheel, a check should therefore always been conducted to see if transmission is stable.
Please note: The reduced range and the unfavorable positioning of the antennas in relation to one another can lead to the low battery message not appearing but gaps in transmission already occurring. In such a case, please immediately change the batteries for the receiver and the transmitter.
Do I have to enter a reference altitude?
The entry of a reference altitude is optional.
As the device’s altitude measurement is based on barometric air pressure though, the current altitude theoretically changes in the event of any barometric changes. To ensure the complete accuracy of the current altitude during your ride, we recommend entering a reference altitude into the device before you set off.
Why does my bike computer show me a different altitude after a couple of days?
The bike computer’s altitude measurement is determined on the basis of the barometric air pressure. Any change to the weather means a change to the air pressure, which can lead to a change to your current altitude.
How can I calibrate the altitude?
The following altitude calibration options are available:
The ‘start altitude’ is the altitude of your usual start location (usually your home). You can find this information on road or country maps. It is set on the bike computer once and can be calibrated within three seconds. The start altitude is permanently stored in the bike computer (including after changing the battery).
The ‘current altitude’ is the altitude of the place in which you are currently located, irrespective of your start altitude (e.g. the start of a trip). The ‘current altitude’ is used if you are out on your bike and altitude information is provided. Only one of the two options needs to be used to calibrate the altitude.
Air pressure at sea level:
If you are at an unknown location (no information available on the current altitude), you can enter the ‘air pressure reduced to sea level’ to calculate the current altitude. The air pressure reduced to sea level can be found online (e.g. www.meteo24.de), in the daily newspaper or at airports (please do not enter this in addition to the current altitude!).
What does the start altitude mean?
The start altitude is the altitude of your usual start location (usually your home). You can find this information on road or country maps. It is set on the bike computer once and can be calibrated within a matter of seconds.
Can I adjust the display contrast?
Your bike computer has a function in the settings menu that enables a three-stage contrast adjustment. For information on how to use this, please see the operating instructions.
Which min./max. wheel circumference can be set as value?
Wheel circumference min. 500 mm
Wheel circumference max. 3999 mm
With the ROX 12.0 GPS, even an input less than 500 mm can be adjusted.
What is the maximum speed that the bike computer can display?
The speed is displayed up to 199.8 km/h with a wheel circumference set at 2,095 mm.
What warranty entitlement do I have?
Warranty claims can be made in the event of material and workmanship errors. Excluded from the warranty are batteries, elastic straps, textile chest straps, e.g. Comfortex, wear and tear parts and wear due to commercial use or accidents. If no speed is displayed, this can be due to the transmitter or the computer.
How can I obtain a replacement?
Accessories are available in the SIGMA Webshop.