DL850E/DL850EV ScopeCorder Free-Run Library


This software (ScAPI.dll) provides an API (Application Programming Interface) for acquiring data from the DL850E/DL850EV series in FreeRun mode.

Applicable Model

DL850EV, DL850E ScopeCorder
      Applicable DL850E/DL850EV firmware version is 4.00 or later.


This software can be used to perform the following functions. For details, see “Detailed API Specifications.”
  • Initializing the API
  • Connecting and disconnecting from the measurement instrument
  • Setting parameters
  • Getting waveform data

System Requirements

CPU: Core2Duo 2 GHz or better
Memory: At least 1 GB (at least 2 GB recommended)

Microsoft Windows 7 (SP1 or later), Windows 8, Windows 8.1, or Windows 10

Development Environment
Visual Studio 2008 or later, .NET Framework 3.5 or later

Software Structure

This software package contains the following items.
  • FreeRun API Library User’s Manual
  • API files (see below)

File Name



FreeRun API Library


FreeRun API Library 64-bit Version


FreeRun API Import Library for C++


FreeRun API Import Library 64-bit Version for C++


Function Declaration Header File for C++


FreeRun API Library for .NET


Communication Library


Communication Library 64-bit Version


USB Communication Library


USB Communication Library 64-bit Version


  • This software is a library designed exclusively for DL850E/DL850EV series Free-Run mode. It cannot be used with other products.
  • Check the version of this software and the firmware version of the DL850E/DL850EV prior to use.
    The corresponding versions are being indicated in the "readme.txt" which is extracted from the downloaded .zip file.



Please read Software Agreement carefully before downloading.


Release Date Apr 18, 2016
File Name DL850E_FREERUNAPI_v1000.zip 4.6 MB
Type Software* Registration is required to download.


* Software Agreement
  • The property rights, proprietary rights, intellectual property rights, and all other rights associated with the software are held by Yokogawa Test & Measurement Corporation.
  • Under no circumstances is any dumping, reverse compiling, reverse assembly, reverse engineering, or any other kind of alteration or revision of this software allowed.
  • This software is offered free of charge, but no unlimited warranties are made against any defects whatsoever.
  • Also, Yokogawa may not be able to accept inquiries regarding repair of defects in or questions about this software.
  • The contents of this software are subject to change without prior notice as a result of continuing improvements to the software's performance and functions.
  • Yokogawa bears no liability for any problems that may occur during download or installation of this software.
  • Use of the Yokogawa Web site is at the user's own risk.
  • Any parties contributing to the creation or distribution of the contents on the Yokogawa Web site shall bear no responsibility whatsoever for any damages occurring as a result of the use of said contents.
  • Note that you must agree to the contents of “Software License” for the software that encloses or displays the “Software License” as the conditions of use.
  • This software product may contain open source software (hereafter referred to as OSS). License terms appropriate for each OSS component are applicable in place of the terms of this license. If there is a discrepancy between the terms of the OSS license and the terms of this license, the license terms of the corresponding OSS take precedence.

Downloading of the software indicates acceptance of the software agreement.

Related Products & Solutions

DL850E/DL850EV ScopeCorder

An all-in-one electromechanical measurement system offering the deepest measurement and analysis features to turn data into insights.