ENVI PRO OPERATION MANUAL - Scintrex

Console Disassembly/Assembly ....................................................................9—4
Cable Repair ..................................................................................................9—4
Trouble Shooting................................................................................................9—5
Chapter 10 Reference Information ...................................................................10—1
Envi Pro Technical Specifications ....................................................................10—1
Dimensions & Weight...................................................................................10—2
Warranty & Repair............................................................................................10—3
Warranty.......................................................................................................10—3
Repair...........................................................................................................10—3
When to ship the unit.................................................................................10—3
Description of the problem ........................................................................10—3
Shipping Instructions....................................................................................10—3
Chapter 11 Applications for the ENVI PRO......................................................11—1
Magnetic Surveying Overview..........................................................................11—1
Introduction ......................................................................................................11—1
Basic magnetic theory......................................................................................11—1
What is being measured? ............................................................................11—1
Anomalies ....................................................................................................11—3
Shape........................................................................................................11—4
Amplitude ..................................................................................................11—6
Variations in the Earth’s magnetic field ............................................................11—7
Diurnal variation ........................................................................................11—7
Micro-pulsations ........................................................................................11—8
Magnetic storms ........................................................................................11—8
Removing magnetic variations ..................................................................11—9
Magnetic targets.............................................................................................11—10
Induced and Remanent magnetism ...........................................................11—10
Survey Planning .............................................................................................11—12
Introduction ................................................................................................11—12
Sampling intervals......................................................................................11—12
Line and Station spacing vs. Anomaly width ...........................................11—12
Precision and Accuracy of Surveys............................................................11—13
Noise .......................................................................................................11—13
Tuning .....................................................................................................11—14
Survey mode ...........................................................................................11—14
Field Observations ..................................................................................11—16
Grid layout and orientation .........................................................................11—16
Survey procedures and a sample survey.......................................................11—17
Introduction ................................................................................................11—17
Survey do’s and don’ts...............................................................................11—17
Laying out the grid...................................................................................11—17
Diurnal corrections vs. Survey pattern ....................................................11—19
Search mode...........................................................................................11—21
Note taking ..............................................................................................11—21
Surveying in the WALKMAG mode .........................................................11—21
Surveying in the Stop-and-Go mode .......................................................11—23
Magnetic cleanliness ...............................................................................11—23
Monitoring your data................................................................................11—24
Post-survey procedures .............................................................................11—24
Clean-up site if required ..........................................................................11—24
Data correction ........................................................................................11—24
Data transfer............................................................................................11—24
Processing data.......................................................................................11—24
Field example.............................................................................................11—25
Columbia test site — Waterloo, Ontario ..................................................11—25
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