Method and system of urea solution level measurement adjustment, display and heater operation

A method of operation of a heater, comprising:

• measuring urea solution concentration injected into a urea solution tank by a urea solution quality sensor;
• determining whether unclean urea solution is injected into the urea solution tank by the measured urea solution concentration;
• determining urea solution temperature is lower than heater operation condition temperature according to the unclean urea solution when the unclean urea solution is injected into the urea solution tank;
• and
• operating the heater when the urea solution temperature is lower than the heater operation condition temperature according to the unclean urea solution concentration.

A system of adjusting, displaying of urea solution level measurement value and heater operation, comprising:

• a urea solution temperature sensor measuring urea solution temperature;
• a urea solution level sensor measuring urea solution level;
• a urea solution quality sensor measuring urea solution quality;
• and
• a controller connected with the urea solution temperature sensor, the urea solution level sensor and the urea solution quality sensor, and lighting up a warning lamp when the urea solution is insufficient, and applying a signal operating a heater according to the urea solution temperature.