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Firmware for GL240 download

Software License Agreement

It is required to review the following license agreement before the software is downloaded. We will be deemed that the customer has to agree to the terms and conditions of the license agreement when the software had been downloaded by the customer. Please note that it is not possible to download or use the software if the customer does not agree to it.

Downloading Files

Ver.1.55 (Latest version)

Date of updated4 Aug, 2022
Supported ProductsGL240
Downloading filesSoftwareGL240_FU(v155).zip (4,033KB)

Revision History


  1. The Web server function can retrieve instantaneous values in JSON format when accessed via the following URL.
    http://<IP address>/json.cgi?
  2. Enhanced communication in the event of unauthorized access to the Web server function such as DoS attacks when the GL240 is connected to an externally accessible Internet connection.


  1. Improved communication over a LAN connection with a slow transmission speed.
  2. Fixed the problem that e-mail could not be sent correctly when using e-mail send function via wireless LAN connection with B-568 (GL Wireless LAN Unit) or slow transmission speed.
  3. Fixed the Korean notation in the message when replacing the SD card during recording.
  4. Changed to not send e-mail notifications continuously in e-mail send function when there is no change in the alarm status and e-mail notification of alarms generated.
  5. Added analog CH annotations to the text of e-mail notifications when an alarm occurs in the e-mail send function.
  6. Fixed the problem that measured values do not display in the e-mail text of e-mail periodic notification when the monitor display is not set to [MONITOR].


  1. Added the notation of C-type thermocouple to thermocouple TC-W.
  2. Fixed the problem that disk error occurs when a file recorded in CSV format is played back and playing back ends with the cursor position at the last point, and the same file is also played back again.
  3. Fixed the problem that logic trigger information is not set correctly when saving and loading settings.


  1. Reduced media loading time at startup.
  2. Changed to “Remove/Switch SD card” menu disabled when the capture file is CSV format, and the backup function is enabled.
  3. Changed the time of e-mail designation in English from “Interval” to “Time”.


  1. Fixed the problem that part of client cannot login on the FTP server of the GL240 when it is accessing to the GL240.
  2. Fixed the problem that sometimes the data transfer function was not worked when the control software is transferring data and then the communication was disconnected several times.


  1. Supported to the optional thermal printer.
  2. Fixed the problem that the data download and some Web server function was not working correctly when the GL240 was connecting to bad condition of LAN and data download was failed several times.
  3. Fixed the problem that time lag of data occurred when the data lost occurred while the application software is receiving data by real time.


  1. Added backup function of the CSV format file.
  2. Added the checksum of capture file.
  3. Fixed the problem that blank filename extensions were not converted to CSV when the result of between cursor statistical calculation saved as CSV file.


  1. Supported to the GRM-ONE Series that is remote monitoring system.


  1. Added units of US in scaling function.
  2. Fixed the problem that the OS system was downed when the I/F command of “:MEAS:OUTP:ORDER?” was sent many times.
  3. Changed some strings in the German display menu.


  1. Fixed the problem that the replayed and stored data was not saved correctly depending on conditions such as sampling or capture time when the CSV data was stored during recoding CSV with Double-Screen Replay.


  1. Fixed the problem that the data was overwritten to the same file when the relay capture.
    (This problem does not occur in any version other than V1.24.)


  1. Fixed the problem that the condition settings file could not save to the SD card slot2.
    (Stored in SD card slot1)
  2. Fixed the writing error of Chinese menu in select of the ring/relay.


  1. Improved handling of errors when connected to GL100-WL via wireless LAN.


  1. Supported to the GL-Connection that is PC software.
    * Update to Ver. 1.21 or higher when connecting to GL-Connection.
    * The GL-Connection must update to later than V1.80.
    The latest GL-Connection can be downloaded from this site.
  2. Fixed the problem that the port number setting of FTP host server was set to 0 after the power was turned on or off.
    * The problem is only with the menu display, and the operation is working with the configured port number.


  1. Added Keep Alive function when using B-568 (GL Wireless LAN Unit).
    Set the time in the “LAN” menu =>“AP-IP Setting” (“ST-IP Setting”)=> “Keep Alive”.
    * This setting is not displayed when not using Wireless LAN Unit.
    * If there is no communication for a specified period of time, the socket connection is disconnected.
  2. Changed a part of the Spanish menu display.


  1. Fixed the problem that rarely stops in the middle when a large size file via FTP is transferred.
  2. Fixed the problem that the web was not displayed when accessed by a host name registered with DDNS as a URL in the web view.


  1. Fixed the problem that the instantaneous value of the pulse was reset every 5 seconds and only counted for 5 seconds when sampling is slower than 5 seconds.
  2. Added the I/F menu to The Recognition Name function.
  3. Improved he restart time for the network.


  1. Added the Accumulated Integration Graph (Stacked column chart) Display function.
    * For details, please refer to the user’s manual (GL240-UM-102).
    GL240-UM-102 can be downloaded from this site.
  2. Supported to Chrome, Safari, Opera as supported browsers for the Web server function.
  3. Fixed the problem that the I/F Command set the 1/10 value when Accumulated CH the Span settings, Trigger Level settings, Alarm level Settings.


  1. Initial version