Electromagnetic Conductivity Meters CMD represent large family of contactless geophysical instruments for fast assessment of ground conductivity and of inphase (susceptibility). Single or multi depth probes designed for 0.5 - 9 m depth range allow single or multi layer mapping in classic or GPS modes including vehicle applications. Due to high temperature stability and calibration accuracy CMD systems open correct way for electromagnetic inversion with sections (layered or gradient structures) well matched with DC imaging. This easy way could be especially appreciated under exacting field conditions like dry and icy soil.
The comfortable and transparent way of operation minimizes requirements for user keeping a wide range of measuring highlights and reliability at the same time:
◇ two manual and two continuous measuring modes with GPS or length mark positioning
◇ minimum need of settings and calibration checking
◇ high resistance against electromagnetic noise
◇ very low weight and power consumption
◇ good visibility of the graphic display under all conditions
◇ large memory capacity
◇ easy data transfer to PC using USB channel or USB flash disk
◇ compatibility with inversion and mapping SW (IX1D, Res2DInv/Res3DInv, Surfer)
One Control Unit for All Probes
◇ Manual or Continuous Measuring Modes with GPS
◇ Fast Response, High Temperature Stability
◇ Multi Depth Mapping with In-situ EM Inversion
◇ Map Preview of Measured Area
◇ Light and Rugged Design
◇ Rechargeable Li-Ion Cells (one charging for 3-4 Working Days) or 6 AA Cells
◇ Easy Control System with Graphical Screen and Large Memory
◇ USB Flash Disk and Bluetooth Communication
The instrument consists of the control unit and probe(s).
Control Unit:
◇ Attachable CMD control unit works with all types of probes.
◇ Five modes of measurements.
◇ Measurement time: 0.1 – 20 s.
◇ 128 MB data flash memory:
◇ max. 64 files.
◇ max. 4.8 millions measured points.
◇ Graphical LCD display 320 x 240, white backlight.
◇ Power supply:
◇ Internal exchangeable rechargeable Li-Ion battery pack (integrated fully automatic intelligent battery charger).
◇ Working time: 3 - 4 working days (24 - 32 hours of continuous measurement).
◇ Internal exchangeable battery holder for 6 x AA single-use or rechargeable NiCd or NiMh batteries.
◇ Operating temperature: -10 °C to +50 °C.
◇ Dimensions: 270 x 90 (145) x 60 mm.
◇ Weight: 0.7 kg (with Li-Ion battery pack).
Probes:
◇ Measured quantities:
◇ Apparent conductivity in mS/m.
◇ In-phase ratio in ppt (magnetic susceptibility).
◇ Measuring ranges:
◇ Apparent conductivity: 1000 mS/m, resolution 0.1 mS/m.
◇Maximum sampling rate: 10 Hz.
◇ Full and half depth range (vertical and horizontal orientation of dipoles).
◇ Operating temperature: -10 °C to +50 °C.
