Page 2 of 3
We can understand its function in the following two easy steps :
Step 1: Let 1 litre of water is need to save as 100% measurement. For this purpose, press 'UP & DOWN' button simultaneously to start measuring then the pump will start to supply liquid untill 'STOP' button is pressed. When 1 litre of water is completed, press 'STOP' button and hence amount is saved.
Step 2 : Now its time to have the output. Suppose we need 2 litres of water then by pressing UP/DOWN button set the output to 200%(because 2 litres = 200% of 1 litre). Now press 'START' button. You'll see that the pump starts to supply water. When amount of supply reaches to 2 litres, the pump will automatically stops. If you need½litre of water then set the output to 50%(because½litres = 50% of 1 litre) and hence so on upto 999%.
These are the LCD functional views :
The working principle is based on a proportionaly function "amount is proportional to time" and requires some calculations. When we start to save a measurement the counter counts the time lapsed to supply the liquid. When the output is set to a particular percentage the count is devided with respect to time.