Preface
vi ENVI-MAG Manual
The complete ENVI-MAG system consists of several basic modules:
â–² lightweight console with a large screen alphanumeric display and high
capacity memory
â–² staff or back-pack mounted sensor and sensor cable
â–² rechargeable lead-acid battery and battery charger
â–² RS-232 cable for downloading data
â–² ENVIMAP processing and mapping software
Upgrades and options
There are optional upgrade kits available for the ENVI-MAG to provide the
following:
1. True simultaneous gradiometery
An additional processor module is installed in the console, a second sensor
with a staff extender and a ruggedized backpack for the WALKGRAD mode
are provided in this kit.
2. Base-station applications
An accessory kit allows the sensor and staff to be converted into a base-
station sensor and the cabling allows a field ENVI-MAG to be connected for
automatic magnetic diurnal-variation corrections.
3. Low temperature operations
An external battery pouch along with a thermostatically controlled display
heater will permit field operations down to minus 40°C.
4. Expanded memory
Larger capacity memory chips are available to provide additional data
storage (up to 5 times the data of the base unit.), allowing you to collect up
to 188,000 readings in the WALKMAG mode. This is a factory installed option.
5. External trigger interface
This kit provides a tool for acquiring evenly spaced data when no survey grid
has been established in advance. The kit is an interface between the
ENVI-MAG and a triggering device (such as a measuring wheel or a hip-chain
that you supply). It works by triggering a station increment at intervals in the
WALKMAG mode. Detailed instructions for installation, interfacing and
usage are provided with the kit.
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