Memory Earth Resistivity and IP Meter
The MiniSting is a low cost resistivity & IP meter especially designed for small
resistivity jobs like electrical grounding-grid testing, soil resistivity test using the Wenner
four electrode method, survey for corrosion control, electrical surveys with the four electrode
method (vertical electrical sounding or profiling). This instrument is also recommended for
The MiniSting is pre-programmed for Wenner, Schlumberger, dipole-dipole, pole-dipole, pole-pole,
mise-a-la-masse, SP, resistance and azimuthal surveys in the manual measurement mode.
The MiniSting can also be used with the Swift automatic smart electrode system or with Switch
boxes (switching 28, 56, 84 or 98 electrodes) and passive electrodes or our
down hole electrode cables. The MiniSting/Swift can perform automatic surveys with any
electrode array and can also also perform surveys controlled by a computer.
Recorded data is saved in the internal memory and at a convenient time downloaded to a
computer for further processing. Our utility sofware "the Administrator" is included
with the MiniSting as well as a serial download cable. The Administrator software is
used for data down-load and command file up-load.
Resistivity imaging data and bore hole to bore hole data can be read directly by our
EarthImager software to produce brilliant tomographic images in color.
The MiniSting has a built in re-chargeable NiMH battery with power sufficient for one
day of manual surveying. The instrument is delivered with a battery charger.
During automatic surveys when the instrument uses a lot of power, it is normally
powered by an external 12 V battery.
- Low cost instrument
- Compact size with built in battery
- Rugged construction
- Easy to use menu driven system
- Versatile instrument for different survey configurations
||Apparent resistivity, resistance, voltage (SP), induced polarization (IP), battery voltage
||400 kohms to 0.1 milliohms (resistance)
0-500 V full scale voltage autoranging.
||Max 30 nV, depends on voltage level
||4 digits in engineering notation.
||The user can switch between high and low voltage limit for the transmitter (800 Vp-p or 320 Vp-p
voltage limit). Actual electrode voltage depends on transmitted current and ground resistivity.
|Input gain ranging
||Automatic, always uses full dynamic range of receiver.
||Max 500 V
||Automatic cancellation of SP voltages during resistivity measurement. Constant and linearly varying SP
|Type of IP measurement
||Time domain chargeabilitiy (M), six time slots measured and stored in memory
|IP current transmission
||ON+, OFF, ON-, OFF
|IP cycle times
||1 s, 2 s, 4 s and 8 s
||Running average of measurement displayed after each cycle.
Automatic cycle stops when reading errors fall
below user set limit or user set max cycles are done.
||Basic measure time is 1.2, 3.6, 7.2 or 14.4 s as selected
by user via keyboard. autoranging and commutation adds about 1.4 s.
||Continuous averaging after each complete cycle.
Noise errors calculated and displayed as percentage of
reading.Reading displayed as resistance (dV/I) and
apparent resistivity (ohmm or ohmft). Resistivity is
calculated using user entered electrode distances.
||Better than 100 dB at f>20 Hz
Better than 120 dB at power line frequencies (16 2/3, 20, 50 & 60 Hz)
||Better than 1% of reading in most cases (lab
measurements). Field measurement accuracy depends on
ground noise and resistivity. Instrument will calculate
and display running estimate of measuring accuracy.
||Calibration is done digitally by the microprocessor based on correction values stored in memory.
||Resistance, Schlumberger, Wenner, dipole-dipole, pole-dipole, pole-pole, azimuthal,
mise-a-la-masse, SP (absolute) and SP (gradient).
||Full resolution reading average and error are stored
along with user entered coordinates and time of day for
each measurement. Storage is effected automatically.
||More than 3000 measuring points can be stored in internal memory.
||RS-232C channel included to dump data from instrument to PC on user command.
||The MiniSting is designed to run dipole-dipole surveys completely automatic with
the optional Swift Dual Mode Automatic Multi-electrode system (patent 6,404,203).
The MiniSting/Swift can run any other array (Schlumberger, Wenner etc.) by using
special user programmed command files. These files are created in an MS DOS type
computer and downloaded to the MiniSting RAM memory and are later recalled and
run in the field. Therefore there is no need for a fragile computer in the field.
||20 key tactile, weather proof keyboard with numeric entry keys and function keys.
Measure button, integrated within main keyboard.
LCD night light switch (push to illuminate).
||Alphanumeric LCD display (4 lines x 20 characters) with night light.
||4 banana plug, pole screws for current and potential electrodes. 10-pole KPT
connector for external power, RS-232C and synchronization connections.
|Power supply, field
||12/24 V DC external power, connector on front panel.
Maximum power output is increased when using 24V supply.
||12V, 4.5 Ah NiMH built-in rechargeable battery. External power connector on front
panel, the instrument automatically selects external battery if present.
||Depends on conditions, internal circuitry in auto mode adjusts current to save
energy. At 20 mA output current and 10 kW electrode resistance more than 2000 cycles
are available from a fully charged battery pack.
||Dual stage charger with switchable input (115/230 V AC @ 50/60 cycles)
||6.6 kg (14.5 lb.)
||Width 255 mm (10"), length 255 mm (10") and height 123 mm (5").
(Please contact our sales department for a price quotation on resistivity meters.)
|MiniSting resistivity meter
2014-04-08 11:25:06 EDT
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