If you need to go to places where the sand is soft and deep you'll be spending a lot of time on your knees beside 6 wheels attending to tyre pressures - first squat beside each wheel in turn to deflate. It's definitely a young man's job, holding that deflator two-handed to each valve for long minutes while the sibilant hiss of escaping gradually diminishes and the flies relentlessly attack and your knees burn like hot coals while the sun smites you mercilessly from above.
Then it's time to re inflate. Screw the hose onto the valve, walk back to the pump to switch it on; wait and watch until the tyre seems the right shape, walk to the compressor and switch it off, walk back to the wheel and check the gauge. Some more air required - walk back to the pump and turn it on. again, wait a little more and try again, and again. Repeat for all four wheels plus the two on the trailer.
There must be a better way than this...........
The Anderson connectors are rated for 50A max though the internal switchgear can handle 60A. Most compressors draw no more than 40A.
And there's a flashlight button provided in case you're doing this in the dark.
System is at rest.
The compressor is inactive.
The deflator is inactive.
All 3 modes - Inflate, Deflate and Auto are available.
Tyre pressure is 195kPa.
Target pressure is 220kPa.
Tyre Size is 31
Tap a green button to start Inflate, Auto, or Deflate.
The system can work in either of two modes - Manual or Automatic.
In the Manual mode the Remote Control continuously updates the mobile phone with pressure information coming from the transducer connected to the inflation hose. The user taps the compressor button to start the compressor, or the deflator button to open the exhaust valve. The Remote will continue to update the mobile with pressure information, but this is of limited value while air is moving into or out of the tyre since the pressure in the hose will differ from that in the tyre. Once the user taps the cancel button for either the compressor or the exhaust valve the pressure stabilises and a reliable reading is shown on the mobile phone. The Remote Control keeps the mobile informed of the state of its outputs and the mobile displays the state of the operation by defragmenting the icon of the operational device.
While air is flowing in or out of the tyre the tyre valve, even when pressed open, constitutes an impediment to the airflow. This makes the pressure in the air hose differ from that in the tyre - when deflating the hose will be at a lower pressure, and higher when inflating. Accurate measurement of the tyre pressure can only be made when there is no air flowing in either direction. (This is the major failing of mechanical pressure regulating systems - they act on hose pressure and not on tyre pressure.)
To use Automatic mode the user dials the target pressure into the relevant window using the up and down buttons and taps the Auto button. The mobile sends the Auto command together with the target pressure and the tyre size modifier to the Remote Control, which determines which way the pressure should go and approximately how long the operation should take. It keeps the mobile updated with the current pressure (not very meaningful at this time), the state of the outputs, and the number of seconds left in the current operational cycle.
Once the estimated time has elapsed the Remote Control switches off whatever output was active and allows five seconds for the pressure to stabilise.If the current pressure is within 5kPa of the target pressure the Remote exits Auto mode and causes a beep at the mobile to tell you to progress to the next wheel. If the pressure is more than 50 mBar from target the Remote Control calculates another cycle and initiates it as before. This continues until the difference from target is 5kPa or less.
The time periods caculated by the Remote Control are generic averages. In real life the time needed to inflate varies with compressor capacity and operating voltage, and deflation rates are dependent on tyre valve apertures. To allow compensation for these variances the tyre size modifier number betweem 1 and 100 may be selected to aid the controller in estimating an accurate estimate for a cycle time. The actual value of this setting that is correct for your tyres is determined by trial and error since there are a host of variables that affect it. Selecting too large a tyre may result in repeated overshoots of the target pressure, so it's better to err on the small side. The last tyre size setting is saved and loaded at the next program start.
The flashlight button is provided for night-time work.
The system is in Auto Mode.
The compressor is running.
The deflator is not active.
Hose pressure is 307kPa
Target pressure is 220kPa
Tyre Size is 78
Cycle has 5 seconds to run.
Tap the red button to stop Auto.
The T- Piece
A T-junction must be introduced into the air-hose to give the Remote Control access to the airway. This T will lead to a quick-disconnect coupler at the entrance to the controller's housing for convenience of stowing, and also to allow the controller to be isolated in the event of a malfunction. When disconnected the aperture from the compressor side will be closed. Both sides of the quick-disconnect coupler are provided as well as the T-junction, both of which will be compatible with 8mm hose.
If you are using a compressor with some muscle - not one of those toys that plug into a cigarette lighter outlet and that get zipped into a little bag and kept under the seat, you'll be connecting directly onto the battery with at least a 50 Amp DC Anderson connector. Most people would want to keep the engine running at idle to prevent unnecessary discharge of the battery while operating the compressor. The control unit can switch a DC current of up to 60A though the the Anderson connectors employed are only rated for 50A, which is current the limit of compressors that we support. Few 160L compressors draw more than 45A Max.
Under these circumstances there should not be enough volt-drop to the compressor to affect the operation of the remote control unit. If Bluetooth communication should fail while the compressor is drawing power it points to a connection problem that undoubtedly also inhibits proper functioning of the compressor and requires urgent investigation.
The cable between battery and compressor should have a cross-section of 6sq/mm, which can carry a current of up to 56A and be limited to about 2 metres if possible. Spring-loaded clamps are not ideal for connecting to a battery - it's advisable to make a short tail of 6sq/mm wires connected securely and permanently to the battery at one end and a 50A Anderson plug at the other.
Price - R1700.00
Includes only the controller, quick-disconnect coupler, WhatsApp and email support.
Excludes shipping charges.
Additionally you will need a 160L compressor, air hose that is compatible with the application, the usual accessories for delivering air to the tyres, and a suitable container such as a high lid ammo box.
PostNet offers a counter-to-counter service for R99 that takes 2 to 3 working days, and this is what many people opt for. Delivery to your door is available from PostNet at additional cost.
Example of the Complete Kit
And there's space for: