OPERATION MANUAL - Scintrex

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Operating the CS-3 in the FieldIt is important to mention that the disturbing effect is reduced, if the directionof the spurious AC field is perpendicular to the sensor optical axis. It hasbeen experimentally determined that in this case the tested magnetometeroperated satisfactory in presence of the disturbing field with magnitude3500nT peak at the frequency 3kHz.The operating range of the tumble angle, in the plane perpendicular to thedirection of the spurious field, was reduced from 10°-85° (without the ACfield) to 25°-65° (with the AC field).2-10CS-3 Manual - part # 762701 Revision 2.0
3 OrientingYour CS-3An ideal magnetometer placed in a constant field should produce a constantfrequency. A real optically pumped magnetometer, regardless of whichelement it uses for its operation (cesium, rubidium, potassium or helium), andregardless of which principle of operation it employs (self oscillating, lockedoscillator), produces a frequency which varies because:• the unavoidable sensor noise makes the frequency jitter around the correctfrequency• the output frequency is somewhat dependent on the magnetometerorientationThe later dependency gives rise to the so-called heading error. Both, themagnetometer noise and the heading error, are low due to proper design andcareful alignment of the magnetometer. Precautions should be taken that theyare sustained low by properly orienting the magnetometer sensor inside theoperating active zone.The purpose of this section is to recommend how to achieve the properorientation without restricting established survey practices.Orientation3-1CS-3 Manual - part # 762701 Revision 2.0
Page 1 and 2: CS-3Scintrex Cesium Vapor Magnetome
Page 3 and 4: CS-3Scintrex Cesium Vapor Magnetome
Page 5 and 6: ForewordGetting StartedAbout this m
Page 7 and 8: ForewordForewordThe CS-3 is an opti
Page 9 and 10: High Gradient ToleranceAbsorption c
Page 11 and 12: • the interfering EM field are no
Page 13 and 14: 1 GettingStartedStartupAbout this m
Page 15 and 16: About this manualChapter LayoutThis
Page 17 and 18: Understanding Instrument BasicsUnde
Page 19 and 20: Understanding Instrument BasicsSens
Page 21 and 22: Understanding Instrument BasicsOld
Page 23 and 24: 2 Operating theCS-3 in theFieldBy n
Page 25 and 26: Setting Up the CS-3Mounting the CS-
Page 27 and 28: Obtaining the Larmor SignalObtainin
Page 29 and 30: Setting the Operating HemisphereSet
Page 31: Operating in the Presence of Spurio
Page 35 and 36: in the southern polar orientation t
Page 37 and 38: OrientationFigure 6a - Plot of tumb
Page 39 and 40: Using a Strapped Down CS-3 for Surv
Page 41 and 42: Sensor Inclination 90°From the gra
Page 43 and 44: Figure 9 - Plot of tumble angle ver
Page 45 and 46: Figure 11 - Plot of tumble angle ve
Page 47 and 48: Sensor Inclination 22.5°The orient
Page 49 and 50: Sensor Inclination 0°The orientati
Page 51 and 52: In the overlap regions the tumble a
Page 53 and 54: Only two orientations are useful an
Page 55 and 56: 4Maintaining YourCS-3 andTrouble-sh
Page 57 and 58: Trouble-shootingThere are largespur
Page 59 and 60: 5 ReferenceInformationReferenceCS-3
Page 61 and 62: Instrument Parts ListInstrument Par
Page 63 and 64: Warranty and RepairUnit #1Concord,
Page 65 and 66: ATheory ofOperationTheorySystem Ove
Page 67 and 68: Therefore, no pumping is taking pla
Page 70 and 71: Figure B-1 CS-3 Block DiagramB-2CS-
Page 72 and 73: four pin I/O connector 2-4TNC conne

OPERATION MANUAL - Scintrex

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