More and more consumers are looking towards nitrogen for tyre inflation due to the added advantages that it can offer.These are temperature stability,reduced osmosis and reduced tyre pressure maintenance.These will all increase the safety for the driver of the vehicle.It also provides the financial benefits of increased tyre life and greater fuel economy.To increase the purity of nitrogen in the tyre the air must be removed.The N2P facility can be set between 0 and 9.This is the number of times the unit will purge the contents of the tyre and then re-inflate with the nitrogen supplied. The DPS can be set between 4PSI/0.3bar/30kPa and 50% of the final target pressure.This is the first deflate lower limit setting.The unit will deflate the tyre down to the DPS setting,and then inflate to the final target pressure.If 1 N2P cycle was set,then the cycle is now completed.If more than one N2P cycle was set,from the second N2P procedure,the unit will deflate the tyre to 50% of the final target pressure and refill to the final target pressure,the purge routine(deflate/inflate)is repeated according to the number of purge cycle set.If both OPS and N2P are set,then the unit will first over inflate to seat the bead,and then continue to purge the contents as required.

 

When fitted,the bead of the new tyre must be seated on the wheel rim.This is done via inflating the tyre past the required pressure until the bead is in place.The pressure needs to then be reduced to the required pressure.Traditionally this is done manually and is therefore time consuming for the operator.The OPS function allows the operator to set the amount of over pressure between 0 and 2 bar/29psi/200kPa.The unit will then over inflate the tyre by the set amount before automatically deflating back to the final pressure required.