Technical Specifications for

Tyrecheckers Light Vehicle LED Alert Caps

Technical Specifications

  1. The Alert Cap is designed to withstand the toughest of conditions, with the casing made of stainless steel, threads of brass and a polycarbonate lens. The Alert Cap is vibration, shock, and “road chemical” resistant.
  2. The Alert Cap is so small (25mm X 15mm) and light (15g) it will have little or no impact on the wheel balancing and is totally water proof and airtight.
  3. The battery is made from alkaline manganese which is a non hazardous substance and therefore doesn’t pose environmental or hazardous waste disposal problems.
  4. The Alert Cap can handle pressure spikes 200 psi above calibration pressure and will operate effectively within -40C - +100C temperature range.
  5. The Alert Cap has an accuracy of +/- 1psi

Battery Life
The battery life has approximately 4 years in stand by mode (with correct tyre pressure) or 6 to 7 weeks of continuous flashing (with under inflated tyres). If on inspection the flash becomes dim, the fully integrated batteries can be changed with 2x G10 button batteries. Each battery is Alkaline Manganese 1.5V, 11mm Diameter and 3.1mm High. Battery Replacements are available direct from www.tyrecheckers.com.au website.
To Recalibrate the Alert Cap
Take the cap off the valve stem. Hold the bottom of the cap using a 15mm 6point socket ( or 2nd key). Using the calibration fork end of the key, twist the calibration top section of the alert cap about 2 turns anti-clockwise. Then using the hex part of key screw the cap onto any tyre with some pressure in it. This will reset the calibration back to Zero. Then unscrew the cap off again and re-calibrate according to steps 1 to 6 in the instructions.
To change the Batteries
Take the cap off the valve stem. Hold the bottom of the cap using a 15mm 6point socket ( or 2nd key). Using the hex part of the key unscrew the top section of the alert cap anti-clockwise until it comes off. Carefully take out the 2 batteries and replace with both batteries Positive sides facing down, to the bottom of the cap, on top of the spring. Assemble the top of the cap again in reverse order.
General Precautions

  1. We recommend you periodically check the battery by taking the Alert Cap off to ensure the LED light flashes. A dimming of the flash will indicate a declining battery and the unit should have batteries replaced.
  2. If you run different front and rear tyre pressures, be sure the caps always remain in their original front/rear positions, since they are calibrated accordingly. To assist you with this you can with a sharp object scratch off the letter “F”(front) or “R”(rear) under the Alert Cap to ensure that it will be reattached to the right axle.
  3. If using Alert Caps in conjunction with valve extensions please make sure that the extensions are designed to constantly be pressurized and that there are no leaks in the joints. We also recommend that you calibrate the Alert Caps on the tyre without the extension before putting them onto the extension. The reasoning is that the additional spring load for the valve of the extensions may interfere with the calibration process.
  4. After fitting the Alert Caps, it is advised to check adequate clearance exists with other mechanical componentry e.g. e.g. brake callipers, bike frames, and that the Alert Caps do not stick out further than the side of the tyre. If they do, please have a shorter valve stem installed.
  5. As batteries are replaceable, Alert Caps can be used on spare tyres or tyres in storage. You can save battery life by taking batteries out or simply un-calibrate the Alert cap. This is done by using the fork end of key and twist the top, approx 2 full turns in a counter-clockwise direction.
  6. No need for a wheel balance but we recommend when you have your tyres balanced, to keep the caps on to include them in the weight.