• Skip to primary navigation
  • Skip to main content
  • Skip to footer
Landviser

Landviser

Enlightening Research

  • About
    • USA
    • EUROPE
    • Partners
  • LandMapper
    • helps farmers
    • maps Golf Courses
    • helps civil engineers
    • grounds safely
    • FINDs treasure
    • locates burials
  • Equipment
    • Electrical Resistivity Instruments
    • LandMapper: RES/EC/SP Handheld
      • Previous Models
    • SibER: RES/IP Subsurface Imaging
    • AEMP-14: Multi-frequency EM Scanner
    • GEOVIZER: ergonomic EM scanner
  • Software
    • RES2DINV and RES3DINV Geophysical Software
  • Solutions
    • Agriculture
    • Environmental Science
    • GIS Portal
    • Subsurface Mapping in 3D with Geophysics
  • HELP
    • DIY
      • Calibrate lab EC cell
      • Make four-electrode probe for soil mapping
      • EC Mapping with LandMapper and Phone GPS
      • GPX to KML to Excel | Lat-Long data transformation
      • 1D VES – Vertical Electrical Sounding
      • 2D Electrical Tomography
      • Self Potential Mapping Procedure
    • FAQs
    • Library
    • Support
  • Sale
  • CONTACT

Setting K coefficient in LandMapper memory

You are here: Home / Equipment / DIY / Setting K coefficient in LandMapper memory

February 20, 2013 By Landviser

LandMapper ERM-02 is usually supplied with one four-electrode probe in Wenner configuration (optional) and the probe-specific coefficient K is preset in the device memory (K1). If you ordered or build multiple probes/cable arrays, you can change K1-K9 coefficients in the device. Note: K0=1 always and is not changeable by user!

  1. Press the power button to turn the device on. As the device is turned on the brief message "ASTRO-LANDVISER" is displayed on the screen of the device.
  2. Press and hold the FUNCTION key (►) and press the UP key (▲) to enter the coefficient changing mode.
  3. Scroll through K coefficients with the keys (▲) or (▼).  Change the value of the coefficient with the keys (◄) and (▲) or (▼). The digit to be changed is selected with the INPUT key (◄), the digit starts blinking and can be changed with the keys (▲) or (▼). The value of K0=01.00 is constant and cannot be changed by the user. If a measurement is taken using K0, the resulting output is resistance, not resistivity, and can be useful when the geometry of the array is constantly changing, as in 2D imaging or electrical tomography. In this case the resistance values can be multiplied by corresponding K coefficients according to the arrays used to obtain the resistivity. In conductivity mode, when measurements are taken with K0, the measured value is conductance, not conductivity, and the results can be converted to conductivity after measurements with appropriate geometrical coefficient.

Note: User only needs to calculate and enter the K-coefficients of the four-electrode probes for resistivity mode, the device automatically outputs results as resistivity or conductivity depending on mode selected and recalculates coefficient accordingly.

  1. To store the new value of the K coefficient press and hold the (►) key, then press the (◄) key. The new value of K coefficient is stored in the device’s memory and the value is not blinking.

 

Display listing:

KN = --,--

 

KN is an ID of the K coefficient (from K0 to K9)

--, -- is the value of the K coefficient from 00.01 up to 99.99

Note: K coefficients depend on probe/cell size. You can build probes suitable to different media.  Solutions/soils with an extremely high conductivity require a sensor with a probe constant greater than 1.0. Solutions/soils with extremely low conductivity require a sensor with a probe constant less than 1.0. The greater the distance between the electrodes, the smaller the current signal (www.omega.com).

 

 

 

Conductivity
(µS/cm)

Resistivity
(Ω-cm)

Dissolved Solids
(ppm)

.056

18,000,000

.0277

.084

12,000,000

0.417

.167

6,000,000

0.833

1.00

1,000,000

.500

2.50

400,000

1.25

20.0

50,000

10.0

200

5000

100

2000

500

1,000

20,000

50

10,000

Filed Under: DIY, Equipment, Geophysical equipment, Geophysical methods, Geophysics, GIS, LandMapper, Soil Science Tagged With: ERM-02

Footer

Landviser - Enlightening Research

CONNECT WITH US

Solutions

  • Equipment
  • Software
  • Analytics
  • Maps

Products

  • LandMapper
  • SibER
  • AEMP-14
  • RES2DINV / RES3DINV
  • RTK GPS
2008-2023 (c) Landviser, LLC