
%0 Journal Article
%A Henderson, R.J. 
%T Discussion on: "Magnetic susceptibility mapping at Broken Hill, Australia" by B.P.J. Stevens, Exploration Geophysics 30 (1999), 105?112
%J Exploration Geophysics
%D 2000/12/01
%V 31
%N 4
%P 629-629
%K 
%R https://doi.org/10.1071/EG00629
%U https://www.publish.csiro.au/paper/EG00629 
%X Mr Stevens indicated that he had used a Geo Instruments' Magnetic Susceptibility Meter, Model GMS-2. He also indicated that there was a problem with instrument drift and difficulty with obtaining a constant zero. We have since discussed this with Mr Stevens and it may be appropriate to indicate to all users of the GMS-2 that the best practice with this instrument, like other instruments of its type, is that the zeroing must be done in a noise-free environment. It should also be zeroed at relatively frequent intervals. A figure of zero or one should be obtained in this case. 
