| 摘要 |
An apparatus and method for conducting a test cycle for an electrometer of an environmental radiation monitor by current injection is provided. The environmental radiation monitor includes a high pressure ionization chamber, a power supply electrically connected to the high pressure ionization chamber, and an electrometer electrically connected to the high pressure ionization chamber. A controller controls the power supply voltage signal provided to the high pressure ionization chamber to create a constant current to be injected into the electrometer. The methods include varying the voltage signal provided to the high pressure ionization chamber, measuring a current signal, processing the current signal with the electrometer and comparing the voltage signal to an expected result, indicating proper operation of the electrometer. Further examples of the method include initiating and discontinuing a test function. |
