V1.61J is not currently suitable for systems using an external correlator. These systems can be identified by a BNC cable connection between the instrument and the PC. This problem will be rectified in a future release.
Support for the COR3180 a functional replacement to the COR3140 board. Now fitted as standard to all Zetasizer products.
A delay has been added between pH reads during calibration to allow the pH to stabilize.
Manual Zeta potential now allows the Zeta potential and mobility to be displayed.
Please note the MPT1 (DL21) titrator is not supported with this version.
Version 1.52
Windows NT 4.0 (service pack 6a)
Windows 98SE
Windows 98
Windows 95 B/C
Windows 3.11
Windows 3.1
Mettler DL21 Macros added to standard release.
Adobe Acrobat 16 bit PDF reader files for all available languages.
M3 and pH probe documentation added.
Version 1.51
Windows NT 4.0
Windows 98
Windows 95
Windows 3.11
Windows 3.1
Implementation of M3 technology.
Revision of sizing algorithms to reduce the need for advanced parameters.
Default display changed to Raw Data.
Version 1.41
Windows NT 4.0
Windows 98
Windows 95
Windows 3.11
Windows 3.1
Delay in measurement sequence before reading pH.
Support for Internal High Power Laser.
Additions to Macro language.
Allow plotting and logging of conductivity and pH values.
Allow pH and conductivity to be set and read using macro language.
Allow assignments of macros directly to buttons.
Ensure limit is greater than 60 points for a temperature scan.
Allow reading of pH in size mode.
Change duty cycling of Zetasizer 300 in FFR mode.
Extension of picture macro command to allow plotting of userlog plots.
Version 1.40
Windows NT 4.0 (service pack 6a)
Windows 98SE
Windows 98
Windows 95 B/C
Windows 3.11
Windows 3.1
Support for Windows NT added.
Support added for Avalanche PhotoDetector (APD).
Include Zetasizer 1000HS and Zetasizer 3000HS in the installation procedure.
Include measurement duration in the measurement quality factor.
The count rate displayed is now only that due to scattering from the sample.
Incorporate FFR as an engineering function.
Increase maximum settable temperature to 70C.
Change the menu function "Reset Defaults" so that the custom correlator address is not reset.
Append error messages to the error log text file during each session rather than overwrite existing file.
Software download 
