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6.Operation interface
6.1 Testing interface display
After enter into the testing interface, for different gas quantity, will
display different interface
：
as the following picture, displaying one gas, two
gas, three gas, four gas orderly.
As the above displaying, time, temperature, pump running, battery
and humidity. Take A for example, for O3, CO, CH2O, Ex, for each gas
with the gas concentration; Once some up to the alarming value, it will
appear the alarming symbol, such as the CH2O alarming.
