Advanced Witness Systems Ltd AWS torque Tourque Innovation AWS

Torque Measurement, Control and Calibration

Kepler 4 Program Suite for Torque Tools

Kepler 4 is a combined program for the calibration and conformity of torque wrenches to BS EN ISO 6789:2017, BS EN ISO 6789:2003 or your own in house standards. It uses a system of databases to keep track of each individual torque wrench and all associated information.





ADMS Kepler 4 Series of software programs are designed to meet the new BS EN ISO 6789:2017 standard for conformity and calibration of Torque Tools.

ISO 6789 is the internationally recognised standard to which torque wrenches must be calibrated. A calibration certificate to ISO 6789 states that a tool meets quality control regulations and accurately applies the correct torque. 

Kepler 4 is built around a new works orders database, which ties together the customer, tool, reading & certificate. Historic calibration and conformity certificates can be found from searching by customer and tool, by works order number, or by certificate number.

The program suite consists of three different versions:

  • Kepler 4 Conformity
  • Kepler 4 Calibration
  • Kepler 4 Combined

Kepler 4 Conformity is written to meet BS EN ISO 6789:2017 Part 1, and Kepler 4 Calibration is written to meet Part 2. The Kepler 4 Combined version meets both parts 1 and 2, and unlocks the use of both parts of the other two versions.

Kepler 4 can be used with ISO 6789:2003, to allow phased migration to the new standard. In-house standards can also be set up to meet specific requirements.

A full comparison between the versions can be found on the specification page, as well as a comparison to Kepler 3. All versions allow for quick, accurate and reliable calibration of torque tools to international recognised standards, and to in-house standards.


Latest Update


We have released a major update to Kepler 4. This update brings several major benefits over the previous version, producing a more seamless operation and improving efficiency.

The ability to store databases on a server rather than individual machines.

This allows multiple databases from multiple copies of Kepler 4 to be stored in one location for more efficient backup and access to results.

The ability to calibrate tools with a drive that has equal positions divisible by 6 (hexagonal drive) to ISO 6789:2017 Part 2.

Taking customer feedback into account we have implemented the calibration of hexagonal drive wrenches to ISO 6789:2017 Part 2 and this is now an option in the "Select Reading Details" screen.

The ability to search for tools by models using the models database.

This powerful new search feature has been implemented to make it much easier to add new tool data to the database and allow calculated uncertainties attached to the model. These can be imported directly into the new tool removing the need for external calculations.

The ability to calculate average values of uncertainties Bod, Bint and Bl over the last 10 calibrated tools of the same model.

Following customer feedback we have implemented this change to assist customers during calibration. Additionally customers can now print out a report of these uncertainties and use averages for bod, bint and bl. It allows the customer to use the uncertainties from 10 calibrations of the same model which will significantly decrease subsequent calibration times.

The ability to import databases from previous versions of Kepler.

This feature allows customers with Kepler 3, Kepler 2002 and Kepler 2000 to import their existing databases into Kepler 4.

The ability to export reports into text or spreadsheet.csv formats and reimport them back into Kepler 4.

Following Customer feedback we have implemented the ability to export reports and certificate templates into text and spreadsheet formats for easier modification and back up. These can be imported back into Kepler 4 when required.

Kepler 4 Conformity

Kepler 4 Calibration

Kepler 4 Combined

Kepler 4 Conformity complies with BS EN ISO 6789:2017 Part 1, allowing the automatic calculation of the mean deviation and mean value for each setting.

It also calculates the deviation for each reading, and indicates by colour whether the reading is within tolerance to the selected standard.



Kepler 4 Calibration complies with BS EN ISO 6789:2017 Part 2, allowing the automatic calculation using new formulae of the mean, deviation and combined uncertainty of each set of readings, for each torque tool.

It allows full tracking of tools calibration performance and history, and the production of a report listing tools that require calibrating.

It also features Production Line capabilities, for hourly or daily tool reliance performance.


Kepler 4 Combined is a combination of the other two versions.

It complies with BS EN ISO 6789:2017 Part 1, allowing the automatic calculation of the mean deviation and mean value for each setting. It also calculates the deviation for each reading, and indicates by colour whether the reading is within tolerance to the selected standard.

It also complies with BS EN ISO 6789:2017 Part 2, allowing the automatic calculation using new formulae of the mean, deviation and combined uncertainty of each set of readings, for each torque tool. It allows full tracking of tools calibration performance and history, and the production of a report listing tools that require calibrating. It also feautres Production Line capabilities, for hourly or daily tool reliance performance.

Shared Features

  • Option to operate in 6789:2003 to allow phased migration to 6789:2017.
  • Built around a new works orders database, which ties together the customer, tool, reading & certificate.
  • Historic calibration and conformity certificates can be found from searching by customer and tool, by works order number, or by certificate number.
  • User generated databases for customers, instruments, tools, model types, & standards.
  • Multiple operator accounts for users, maintainers & administrators (with passwords).
  • Data output and report generation collated and filtered from any combination of good and out of tolerance tools.
  • Auto or manual certificate numbering.
  • Select different printers for readings, labels, and reports/certificates.
  • Fast tool entry from model database.
  • Multiple translations available, including the facility to create your own translation.
  • Tool performance & data input via COM port and keyboard.
  • Option for bar code direct entry.
  • Bespoke templates easily created for certificates, reports and labels.
  • Import and Export readings for efficient database usage.
  • Cloning facility speeds multiple tool data entry.
  • Archive all readings within a selected period.
  • Tool area and station location.
  • All certificate print details recorded. Enables exact facsimile reproduction.
  • Auto print option to print reports of readings as soon as they are completed.
  • New operating & improved screens.
  • Colour configuration.

System Requirements:

Minimum Screen Resolution: 1280x768.
Software is a .NET application using an SQL Database.
Minimum System: i5 Processor or equivalent, 4GB RAM, on board graphics, 500GB HDD.
Keyboard & Mouse Interface.