TTR100 - Hand-held Transformer Turns Ratio Tester

  • Tests turns ratio, phase displacement, excitation current, vector group, winding resistance and polarity
  • Fully automatic; fast; easy-to-use; handheld; robust; lightweight
  • Battery powered with power-saving and shutdown function
  • Alphanumeric keyboard
  • RS232 for data transfer and printing
  • Stores 200 test results and 100 user-defined transformer test settings

The TTR100-1 is a handheld, robust, lightweight and battery-operated instrument. This TTR will complement several existing Megger transformer test products and will offer functions, such as winding resistance and polarity. These functions, as well as the phase angle measurement function, can be switched off when not required.

With a turn ratio of 20,000:1, the TTR100-1 offers the highest turns ratio accuracy in the industry of 0.2%. The TTR100-1 features special software capabilities.

The TTR100-1 is used to perform final test and calibration of transformers in the manufacturing process, such as a QA or Test Department. Using the new TTR100-1 in this environment will improve the productivity of such QA testing, as well as efficiently collect and store large amounts of data, which can be uploaded to a PC spreadsheet, or database program.


COMLink 1.08 is the latest release. The file links below remain for TTR100 users and as a backup for customers in transition to PowerDB™ Lite, PowerDB™ Advanced or PowerDB™ Pro.

Please consider PowerDB™ Lite as your new enhanced interface to all your Megger Instruments that formerly were supported by COMLink. PowerDB™ Lite is free and can be downloaded from here: PowerDB™ Software Downloads Page Additional capabilities are available by purchasing PowerDB™ Advanced or PowerDB™ Pro.

COMLink Version V1.08 (zip)
11.5 MB | 10/12/21
Manual, English (pdf)
3.6 MB | 10/12/21
Using ComLink on Windows 7
112.1 KB | 10/12/21
TTR100 hand held

You have selected to update your TTR100

  •   If this is an error, please use the back of your browser back button to find the right software.
  •   If the TTR100 is returned for re-calibration or repair it will be updated to the latest version of firmware.
  •   We recommend that you return your TTR100 for calibration check each year.
  •   The factory supplied Certificate of Calibration that comes with the instrument is valid for one year.

Improvements in TTR100 firmware

All later versions include corrections and improvements from previous versions.

Version V1.14

  •   Cleaned up some broken menu items from version 1.13

Version V1.16

  •   Corrects issue with versions 1.09 to 1.14 corrupting or losing serial number after upgrade.
  •   Adds firmware information after serial number on information screen of instrument.

To update the firmware of the TTR100:

  •   Download the TTR100_FWvx_xx.exe file below. Where x_xx is the current version of upgrade program.
  •   After downloading to your PC, run the upgrade program which will install this upgrade program to your PC and open it to allow upgrading an instrument. If accepted during the install, an Icon will be provided on the desktop as well so the actual instrument upgrade can be done at a later time. If the icon creation was not accepted, use the start menu and find the upgrade program under Megger in the programs list.

(MD5 for v1.16 file: 012be3f0ad04b38be3b8e270b8928556)

! ! ! ! CAUTION!!

  •   We recommend that you transfer all your test results to your PC before upgrading your TTR100.
  •   Read the TTR100 user manual for how to transfer the test data to your Personal Computer.
  •   Downloads are provided below.
Manual, English
1.9 MB | 10/12/21
TTR100 version V1.14
416.7 KB | 10/12/21