横河仪器测量电路简单介绍
仪器仪表记录笔、记录纸由此进
MeasuringCircuit.
showsasimplifiedschematicforthe
ER180recorderwithmanualrangeselectorunit-6
thermocoupleinputsand2ranges.Inthestandard
ER-180recorderwiththermcooupleinput,aslidewire
resistorwithnon-linearresistanceperunitlength
isusedtocorrectforthenon-linearity（记录笔、记录纸）
ofthermocoupleinput.However,intherecorder
withmanualrangeselectorunit,linearizercircuits
areusedforrespectiverangestocorrectforthe
thermocouple'snon-linearity(theslidewireresistor
islinear).Thelinearizer'sinput-outputcharacteristic
ismadetoagreewiththethermocouple.The
linearizerconvertsthethermocouple.
Figure4-2showsasimplifiedschematicforthe
ER-180recorderwithmanualrangeselectorunitRTDsinput,
6measuringpointsand2ranges.AsRTDshavecomparatvely
lowresistances,relaycontactsareusedintherangeselector
circuittominimizethecircuitresistance.
如需更多记录笔、记录纸知识由此进jilubi