Technical Specifications - MK8E1000 RES/IP/SP
Input impedance > 20 Mohm
Resolution: up to 10 nV
Max. input overload: 500 V p-p
Dynamic range: > 100 dB
16 2/3 Hz and 50/60 Hz suppression > 80 dB
time of stabilisation < 1 sec
frequencies 0.3 Hz / 1.04 Hz / 2.08 Hz / 4.16 Hz / 8.32 Hz / 25 Hz
Current - steps 0.1 μA / 5 μA / 50 μA / 0.5 mA / 5 mA / 50 mA / 100 mA / 200 mA / über 0.5 %
max. output voltage 350 V p-p
Precision 0.5 %
Power consumption: < 300 mA/12 V
ACD (AD-Converter): 24 Bit, 160 Hz, single channel
Max. amount of electrodes 1000 in steps of 100
Max. channels 8 in in steps of 1







     
  Product size and weight:  
  7 kg, 50 cm x 40 cm x 20 cm, resp. 15 lb / 20 in x 15 in x 8 in  
     
 
  Transmitter and Receiver:
 
  • For the system works with frequencies of 0.3 Hz, 1.04 Hz, 2.08 Hz, 4.16 Hz, 8.32, 12.5 and 25 Hz and has a built-in Lock-In-Amplifier the highest possible sensitivity of the Receiver is guaranteed.
  • Disturbances through frequencies of trains (16 2/3) and line frequencies (50Hz) are eliminated.
  • Thus interferences through capacitive and inductive couplings between Transmitter and Receiver are also avoided.
  • The use of unshielded multi-core cables is also possible.
  • Measuring of the induced polarization is optionally possible so that the complex specific resistivity can be registered.
  • Due to the high resolution of the Receiver (up to 10 nV) the Transmitter can be operated at a relatively low power input which ensures that stability and accuracy of the results aren't affected.
  • This, combined with a high degree of efficiency (up to 80% of the input power penetrates into the soil), ensures long time field use and lifetime.
  • At max. power output the internal standard batteries last for about 10 hours.
  • Connection to external power supplies (6V-24V) is possible at any time.
 
  Selection of the electrodes
 
  • Low-power decoder and relay components allow to choose always 4 different electrodes from 50 electrodes (standard version, optionally upgradeable up to 1000). These may be switched as power input or potential sensor electrodes
  • The selection takes just some milliseconds and needs a minimum of power.
  • All necessary settings and measuring parameters of the analog parts (Transmitter and Receiver) as well as the 24bit ADC are controlled by a µ-Controller.
   
  µ-controller and ADC
 
  • Selection of the electrodes and testpoints is realized through the internal µ-Controller
  • The internal µ-Controller can be operated by an exterenal computer (e.g. notebook) with the user-friendly software GeoTom.
  • . The external computer is connected either via serial bus (RS232), via USB or optionally via a radio transmission device, which ranges 1km at max. with no hindering objects in sight).
   
  Housing (for 100 Electrodes):
 
  • Compact (50 cm x 40 cm x 20 cm, resp. 20 in x 15 in x 8 in)
  • Shock and splash water resistant (The parts are assembled into a Peli(R) 1520 Case)
  • All necessary components like Transmitter, Receiver, Controller for the selection of the electrodes, µ-Controller, ADC, power supply and battery recharger are integrated
  • for every 100 electrodes an additional Peli 1520 is necessary
   
  Power Supply:
 
  • Internal 12V Power Supply (leak-proof lead gel accumulator 12V/3,5Ah)
  • Charging either via direct connection (standard power cord, 240V AC) or either via connection to external batteries with 6V-24V
   
  Cable and Electrodes:
 
  • Connection of max. 4 cable systems with 25 takeouts each, spacing 1m, 2m, 4m or 8m
  • Electrodes are made of rustproof T-shaped high-grade steel (Æ 8 mm (0.3 in), length about 35 cm, resp. approx. 15 in) with 4 mm (0.15 in) borings which allow the connection to the takeouts of the cable
  • The takeouts at the cable system are connected to the electrodes with isolated strands and alligator crimps or directly with steel spring clips