hechengzi
第14楼2012/05/14
The sample coming out from the cell passes through an electronic mass flow transducer before it is vented into the atmosphere. The mass flow transducer gives flow information to the microprocessor system. This information is used to control the intensity of signal to be sent to the thermofluidic flow control valve. The microprocessor executes a P.I.D. algorithm (proportional - integral - derivative) to maintain the flow at the set point value. Never block the vent, or permanent damage will result to flow transducer. Leave vent at atmospheric pressure.
Never leave the flow set point higher than zero cc if gas is not
available, there is a risk to burn the valve, and flow module replacement will be necessary. For this reason make sure that gas is available before powering up the analyzer.
自己看。。。
chengjingbao
第17楼2012/05/14
我刚才查了一下plasma,如果采有FID类型的电子流量调节阀,则可以不通气通电,下好我上月刚进的一台PLASMA,需要更换屏幕电路板,到时拆开来看看就知道了。两种阀一对比就知道了。
http://bbs.instrument.com.cn/shtml/20110903/3502903/
hechengzi
第19楼2012/05/14
LDETEK的LD8000里面根本就没有象K2001一样的流量模块。。样本请看http://www.ldetek.com/pdf/LD8000_design_report.pdf