The Pseudosection Kit comprises of:
- A Software up grade (for existing TAR-3 Meters)
- Thirty (350mm, 8mm diameter) stainless steel measurement Pins/Probes - Thirty probes in total
Each probe weighs 0.185kg (30 probes weigh 5.5kg). (Other quantities are available)
- Two Extension Leads (6.5m long with a jack plug and socket).
Used with the Two cables supplied with the TAR-3 Resistance Meter kit
- Two 4mm Insulated Crocodile Clip - Black
- Two 4mm Insulated Crocodile Clip - Red
Figure (1) TAR-3 Resistance Meter Pseudosection Probe Line - The 30 probes can be walked down the line to create pseudosections 99 probes long
This is a manual system. Users:
- Create Wenner alpha array TPE file using the TAR-3 Unit! Just enter the total number of probes in the LINE (n) and the maximum probe spacing, 'c' in the settings and the TAR-3 will create the template file.
- Template Files can also be created online - you will need to know:
- The number of probes you have
- The length of the Pseudosection Line (in multiples of probe separations, a).
The probe separation, a can be 0.25m, 0.5m, or 1.0m etc depending on your interpretation software
- The maximum multiple of the probe separation (c)
In addition to the Wenner Alpha Array other array configurations can be created (Double-Dipole, Schlumberger etc)
- Copy the Template File on to the SD Card - up to 99 Template Files can be stored on the card,
- Enter the new 'Line Mode' and select the Template File they wish to use,
- The operator connects the leads to the probes in the order displayed on the TAR-3's LCD Display
- The results are logged and stored on the SD Card in a text file using a copy of the Template File
Reading templates are entered position by position in the following format:
Listing (1) The TPE input file. TPE files can contain Comments '#'
Line No= 6
0 0.5 11.4033
0.5 0.5 11.0528
1 0.5 12.4403
0 1.0 5.8020
0.5 1.0 5.1053
The TPE file above would produce the output above where ? has been replaced with actual readings
Listing (2) A sample of the output produced by the TPE file in Listing (1)
The position of each probe is displayed on the TAR-3 Resistance Meter during use and offer real time information on the correct cable connections.
Where the readings are taken/displayed sequentially based on 'No.' The 'Pos' is used to order the results in the output. This enables readings to be reordered when the line is completed.
The TAR-3 unit does not validate the file - it reads the information and displays it on the LCD screen - any probe combination can be used. Wenner (alpha), Double-Dipole or Schlumberger, etc.
Lines can be up to 99 probes long.
The output text file is compatible with RES2DINV
and can be conver/ted to any other format using our online conversion/formatting tools.
The TAR-3 Resistance Meter Section kit and software is a great advance from using a meter with pen and paper. Templates can be download or created enabling users to quickly (and accurately) repeat 'Lines' Results can be merged using Microsoft Excel® or other spread-sheet or outputted in any format using our on-line tools. This is a true 'Section' tool.
No dummy lines or odd shaped grids needed.
The data is also stored in a 'binary' format (as a backup copy) and can be unpacked to a format compatible with existing sectioning software (RES2DINV, etc).
The probes/pins have a 4mm diameter hole in the end and can accept a jack plug. For speed crocodile clips are supplied enabling cables to be speedily 'walked' along the probes in the section.
The TAR-3 Meter measures the apparent (actual) resistance. Users should use the appropriate scaling factor to calculate the resistivity if required.
The TAR-3 Resistance Meter Line Mode can process 999 lines/readings which is enough for lines of Ninety-Nine probes and Nine deep which requires at least Twenty-Eight probes (856 readings in total). 856 readings, at one reading per minute, is over Fourteen hours work (nonstop). Two (or more) day's work can be combined quickly and safely using a text editor.
Figure (2) The cables are walked down the line.