Syscal R1 Plus

Switch 48 Imaging Option
Switch 72 Imaging Option
Case History
Now with 200W of Power

  • Measures voltage & current simultaneously
  • 200 W new Output Power
  • 1200 V Peak to Peak
  • 2.5 A Maximum Current
  • Automated Electrode Switching System Available
  • 20 Bit A/D Converter
  • Chargeability / IP Measurements

The Syscal R1 Plus resistivity meter is the most powerful, internally powered, transmitter/receiver unit available for DC resistivity applications. It features 200W output and may be powered from internal rechargeable battery, or external 12 V. Surveys to depths of 200 meters can be achieved with confidence.

The unique two channel design of the Syscal resistivity meters permits measurement of voltage and current simultaneously. This results in an instrument with very high accuracy and freedom from noise. Noise rejection is better than 120 db at power line frequencies. A 20 bit A/D converter provides excellent resolution and data quality.

The large, high contrast, LCD screen, with large keypad, allow the R1 to be used easily in field conditions. The case is fully watertight, with the only access through the top keypad, which is protected by O ring seals.

At the start of each measurement the SP value is displayed. This value is also stored with each reading. SP compensation is automatic, with linear drift correction, using digital filtering. The SP value is measured during stacking with every third stack, and his new value is then used for applying the SP correction. This results in very accurate correction of the SP drift reading.

Automatic ranging during digital stacking improves noise reduction. Up to 250 stacks may be done per measurement. During stacking a running average of voltage and current permits the operator to observe data quality. Standard deviation for each measurement is stored with the reading.

With input of type of array, and geometrical electrode spacing values, the R1 will calculate and store the apparent resistivity. Up to 1,000 measurements are stored, with voltage, current, resistivity, geometrical parameters, and a station number. Data transfer is provided by serial link.

Power is supplied from internal rechargeable battery, or external 12 V. The battery charger is external, and compatible with either 110 or 220 V. Typical field operation time from the internal battery is more than 3,000 readings.

The Syscal R1 Plus resistivity meter is compatible with the automated electrode switching unit called the Intelligent Node System. With this system the operator can design the array and sampling routine desired, then download this to the R1 for execution in the field. Up to ten arrays may be preprogrammed and downloaded to the R1. In the field these are recalled, and minor adjustments may be made, such as number of stacks. Each array may be run for whatever number of profiles are needed, up to the capacity of the memory storage. Back in the office, files are uploaded, and results are automatically displayed. Multiple profiles may be merged to create the final color pseudosection.

The Syscal R1 Plus resistivity meters are unmatched in power output, and unmatched in data quality, thanks to its unique two channel design. This design, which permits the simultaneous measurement of both voltage and current, allows accurate readings to be made, even in noisy conditions. Be sure to specify this two channel design when you want the best data available.

For compatible modeling software see the Resix Plus package.


  • Resolution: 10µA
  • Accuracy: 0.3%
  • Max. Output Current: 2.5 A
  • Max. Output Power: 200 W new
  • Maximum Output Voltage: 600V (1200V peak to peak)
  • Pulse Duration: 0.5s, 1s and 2s
  • Voltage Measurement Specifications:
  • Resolution: 1 µV after stacking
  • A/D Converter: 20 Bit
  • Accuracy: 0.3%
  • Output Impedance: 10 MOhms
  • Input over voltage protection
  • Input Voltage Range: ± 10V
  • Automatic SP Bucking: (±10V) with linear drift correction (up to 1 mV/s)
  • 50Hz and 60Hz power line rejection
  • Continuous Digital Stacking : Up to 250 stacks
  • LCD display of 2 lines, 20 characters
  • Weather resistant case
  • Dimensions: 21 x 31 x 21 cm
  • Weight: 9.5kg, including battery
  • Power Supply: Internal 12V 7Ah rechargeable battery or external 12V
  • Operation Temp. Range: -20°C to +70°C
  • Storage Temp.: -40°C to +80°C
Standard Components

Syscal R1 Plus resistivity meter console, batteries, transit case, data transfer cable and software.

Ordering Information

Description Order Number
Syscal R1+resistivity meter 500-190-0001
Multi-Electrode Nodes 500-190-0170
Sounding Cable Set 500-190-0800
Wenner Cable Set 500-190-0900