Hardware-Reset after Firmwarecrash, short instructions

A wrong or not completed firmware update can be restored as follows:


  • Open the battery compartment and disconnect the battery in the device (pull the plug)
  • Disconnect charger from SPECTRAN
  • Connect the SPECTRAN via USB to the PC
  • Connect the charger to the SPECTRAN
  • Hold the ENTER key and press the ON button at your SPECTRAN once. SPECTRAN now starts an emergency program and logs on to the PC. The SPECTRAN starts but on the screen there is no indicator.
  • Now you can start a new firmware update. If it is completed, press the MENU button and the the CLEAR button directly. Don't forget to make a Factory-Reset (You can find it in the SPECTRAN menu, menu point "Setup" and run the entry "Factor" by pressing the ENTER-button). Don't use the LCS software for updating!


Now the device should work properly again.


Hardware-Reset after Firmwarecrash, detailed instructions


A wrong or not completed firmware update will make sure that your meter will not boot. By following this instructions you can reset your SPECTRAN after a bad firmware update to its default configuration. Please follow the instructions exactly.

Open the battery box

1. Open the battery box

To open the battery compartment you will need an ordinary screwdriver. Loosen the screw on the battery compartment cover until this can be removed easily.


You now have access to the battery itself and the connection of the SPECTRAN battery (see picture).

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2. Disconnect the battery from the SPECTRAN

Unplug the charger from the SPECTRAN first. To disconnect the battery in the device, it must be lifted carefully with a screwdriver. It is important that the front edge of the battery is over the plug. So it is possible to pull the plug backward under the battery in the next step (see Figure 1).



Unplug the battery from the board requires some dexterity. (the same applies when inserting).


Hold with one hand the raised battery. Now take the screwdriver and push the plug from the socket under the battery. If the plug is completely disconnected from the socket, the cable can be attached on to the battery (see Figure 2).




  • Connect SPECTRAN to the PC with USB cable
  • Connect power supply

3. Connect SPECTRAN to the PC

Connect the SPECTRAN via USB cable to the PC. Then connect the charger / power supply to make sure that your SPECTRAN can be turned on.

the emergency program

4. The emergency program

To start the emergency program, simultaneously press the "ENTER" and "ON " button. SPECTRAN now starts an emergency program and logs on to the PC. Please note. During the emergency program there is no indicator on the display!


5. Install NEW firmwareupdate

Download now (if not already done) the firmware-updater and unzip it into any directory. Open the "exe" file and the updater will start. On Windows Vista / 7 systems, an administration dialog can appear. In this dialog you have to click the "OK" button.


After starting, the updater should identify your SPECTRAN devices automatically. Please click the "Perform Firmware Update" button to start the update process and follow the instruction of the updater.


Important: Use only the firmware-updater!


If the process is complete turn on the unit and press directly the MENU button and then the CLEAR button.

At the end of the updates you must perform a factory reset. Go to your SPECTRAN menu and select the entry "Setup". Then select the item "Factor" and confirm with the ENTER key.



The device should now work properly.


Finally, connect the battery and close the battery compartment.