Cs-3 Manual - Scintrex

Operating the CS-3 in the Field• sinewave Larmor signal is transformer coupled inside the sensor electronicsbox on to the D.C. power supply line. This is done in a similar way as in theolder models of Varian and Scintrex cesium vapor magnetometers. The onlydifference that the output amplitude of the CS-3 is electronically stabilizedto be independent of the sensor orientation or slightly dependent of theLarmor frequency over the range of 50-350kHz. This additional feature willprevent the sensitivity of the magnetometer to deteriorate more thannecessary in presence of the power supply noise. The power supply noiseaffects more the signal with the lower amplitude.Couplers, Processors and Power SuppliesIn older magnetometers the output amplitude was varying as much as 10:1.The CS-3 magnetometer could easily replace, as far as the power and signalconditioning is concerned, the older models without any changes to theexisting equipment such as sensor couplers, magnetometer processors, powersupplies.The only incompatibility is in the control of the operating hemisphere, as itwill be explained in the next section. The Larmor signal coupled on thecoaxial power cable could be transmitted to the processor (decoupler) overthe distance of up 100 meters before it is decoupled by a transformer.Many of modern magnetometer processors, such as Scintrex MEP series ofprocessors, incorporate the power and signal conditioning circuits such as theregulated power supply and the sensor decoupler. One has to just connect thecoaxial power cable to the appropriate power output connector and theinstallation is complete. The supply current is measured and displayed, aswell.For more detailed information, please, refer to the specific processoroperating manual. The MEP series of processors obsoletes the oldergeneration of Scintrex self standing sensor couplers such as VIW2340A1 orVIW2340D4, but they still could be used in existing installations to decouplethe Larmor signal from the CS-3.2-6CS-3 Manual - part # 762701Revision 1.0