发明名称 |
SET POINT CONTROL CIRCUIT FOR AN INFRARED GAS ANALYZER |
摘要 |
AN IMPROVED SET POINT CONTROL CIRCUIT FOR AN INFRARED GAS ANALYZER An arrangement for ensuring the stability of the set point for a gas analyzer is disclosed. The set point control circuit utilizes an amplifier which is alternately switched between a reference voltage and a sensor signal to provide a signal to a processor representing the reference signal and the sensor signal. The processor compares the two signals and adjusts the heater associated with the sensor to provide a stable set point for the gas analyzer. The arrangement eliminates the need for precision resistors within the set point control circuit and therefore significantly reduces the cost of the circuitry. |
申请公布号 |
CA1319525(C) |
申请公布日期 |
1993.06.29 |
申请号 |
CA19890596635 |
申请日期 |
1989.04.13 |
申请人 |
ANDROS ANALYZERS INCORPORATED |
发明人 |
ROGERS, RAYMOND E. |
分类号 |
G01N21/61;G01J1/18;G01N21/27;G01N21/31;G01N21/35 |
主分类号 |
G01N21/61 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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