The STING R1 is a state-of-the-art portable earth resistsivity
meter with memory storage of readings and user defined measure
cycles. It provides the highest accuracy and lowest noise levels
in the industry.
| Measurement modes |
Apparent resistivity, resistance, voltage, battery
voltage |
| Built-in methods |
Schlumberger, Wenner, Dipole-Dipole, Pole-Dipole,
Pole-Pole, Mise-a-la-Masse, Resistance, SP-grad, SP-abs,
User (see below) |
| User methods |
Custom arrays and Swift measure sequences can be
designed and loaded into the Sting memory for later
execution in the field. Loading software delivered with
the Swift system. Design software available as add-on
options. |
| Smart electrodes |
Directly controls Swift Smart Electrodes. Total
automation of the measure sequence for a large array of
electrodes possible. |
| Measurement ranges |
400 kohms to 0.1 milliohm (resistance), 0-500 V full
scale autoranging (voltage) |
| Measuring resolution |
max 30 nV, depends on voltage level |
| Screen resolution |
4 digits in engineering notation. |
| Output current |
1-2-5-10-20-50-100-200-500 mA |
| Output voltage |
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. Instrument always starts
up in low voltage setting for safety. |
| Input gain ranging |
Automatic, always uses full dynamic range of
receiver. |
| Input impedance |
>20 Mohms |
| Input voltage |
Max 500 V |
| SP compensation |
Automatic cancellation of SP voltages during
resistivity measurement. Constant and linearly varying SP
cancels completely. |
| Measure cycles |
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. |
| Cycle time |
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 |
| Signal processing |
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. |
| Noise suppression |
better than 100 dB at f>20 Hz better than 120 dB
at power line frequencies (16 2/3, 20, 50 & 60 Hz) |
| Total accuracy |
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. |
| System calibration |
Calibration is done digitally by the microprocessor
based on correction values stored in memory. The
correction values are found in final production testing
and are also established during later periodical
recommended yearly checks at authorized service centers. |
| Data storage |
Full resolution reading average and error are stored
along with user entered coordinates and time of day for
each measurement. Storage is automatic |
| Memory capacity |
Over 3000 measuring points can be stored in the
internal memory. |
| Data transmission |
RS-232C channel available to dump data from
instrument to PC computer on user command.Also used to
program Sting for user defined measure cycles.PC programs
supplied with instrument. |
| Communication setting |
4800 baud, 8 data bits, no parity, 1 stop bit |
| User controls |
20 key tactile, weather proof keyboard with numeric
entry keys and function keys. |
| LCD Display |
Alphanumeric display (4 lines x 20 characters). Used
for display of results and menus. Night light by LED
backlight panel available on switch operation. |
| Connectors |
4 banana plug pole screws for current and potential
electrodes.
10-pole KPT connector for external power, charge, RS-232
and remote trig connections |
| Power supply |
12 V, 4 Ah NiCd rechargeable snap-on battery.
External power connector on front panel, the instrument
automatically selects external battery if present. |
| Operating time |
Depends on conditions. At 20 mA output current and 10
kohm electrode resistance more than 2000 cycles are
available from a fully charged battery pack. |
| Battery charger |
Dual stage charger with switchable input (115/230 V
AC @ 50/60 cycles). |
| Dimensions |
Width 112 mm (4.4"), length 293 mm (11.54")
and height 308 mm (112.11"). |
| Weight |
6.6 kg (14.5 lb) including snap-on battery pack. |
