Introduction
A1-2 ENVI-MAG Manual
Cold boot
Note: Please read the section “First time operation” on page A4-1 so that you
will know how to do a cold boot of the instrument. This is needed the first
time you use it, whenever you wish to change operating configurations,
or after the batteries have been removed for more than 10 minutes.
Instrument overview
The SCINTREX ENVI-MAG is an easy-to-use, light-weight, battery-powered, por-
table magnetometer. It is a total-field instrument using the proton-precession
technique to measure the local magnetic field. Optional upgrade kits allow the
instrument to be used as a gradiometer or as a base-station. The standard config-
uration has the sensor mounted in a back-pack mode permitting rapid data ac-
quisition in the trademarked WALKMAG mode.
Measured data is stored in memory along with the coordinates where the mea-
surement took place. In the advanced configuration modes, you can also enter
descriptive notes of up to 32 characters at any station. The data can be displayed
either numerically or graphically for quick inspection of the data quality and
spotting of anomalies. Data can also be recalled from memory for visual inspec-
tion, dumped to the serial port (RS-232) of a computer or directly to a printer. In
addition to this, the base-station data can be recorded on a strip-chart recorder.
You can also automatically correct your magnetic data for diurnal variations
when another ENVI-MAG is used as a base-station or when you conduct your
survey in the TIE mode.
To make the ENVI-MAG easy to use, there are preset configurations for site
characterization, drum location, archaeology, general search, ground water,
mineral, oil and gas exploration. These configurations fall into two categories:
basic (where you only need to set a few parameters) and advanced (where you
have complete control over all operating modes).
The operating modes of the ENVI-MAG can be manual, semi-automatic or fully
automatic. In the WALKMAG (walking magnetometer) mode, data are acquired
and recorded at rates of up to two readings per second, as you walk at a steady
pace along the survey line. At desired intervals, you trigger a station marker by
pressing a single button and the co-ordinates are automatically assigned to the
recorded data. You can even introduce delays in the automatic recording to
compensate for walking over rugged terrain.
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