Self-heating electrometer for high pressure ion chamber for verification of temperature compensation
US9024618B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2012 |
| Grant date | May 5, 2015 |
| Priority date | — |
| Expiry date | Jun 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for verifying the temperature compensation correction factor accuracy of an electrometer is provided. The electrometer includes an electrical amplifier to convert a current signal to a voltage signal. The electrometer also includes a compensation circuit to modify the voltage signal for temperature compensation. The electrometer further includes a heat producing device to induce a temperature change of the electrical amplifier and the compensation circuit. An environmental radiation monitor is also provided. The environmental radiation monitor includes a power supply, a high pressure ionization chamber, and the electrometer. The method includes providing an environmental radiation monitor, measuring the voltage signal at a first time, activating a heat producing device, measuring the voltage signal at a second time, and comparing the two measured values of the voltage signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.