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I recently found a Gossen Variosix Electronic light meter (also known as the Gossen Polysix) at a thrift store. Unfortunately, the battery compartment won't open. I turn the thing on the bottom but the compartment does not loosen. It's important to note that the enite back is supposed to come off.

Gif of problem

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  • \$\begingroup\$ "Variosix Electronic 2"? \$\endgroup\$ Feb 17, 2019 at 23:34
  • \$\begingroup\$ @rackandboneman I think so. It looks the same, but lacks the "2" on it. \$\endgroup\$
    – Jrbdog
    Feb 17, 2019 at 23:59
  • \$\begingroup\$ Manuals: gossen-photo.de/aeltere-geraete-foto \$\endgroup\$ Feb 18, 2019 at 0:04
  • \$\begingroup\$ @rackandboneman Mine is called the Variosix Electronic, which I think is the same as the Polysix Electronic 2. \$\endgroup\$
    – Jrbdog
    Feb 18, 2019 at 0:17
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    \$\begingroup\$ @xiota A video on YouTube shows how: youtu.be/AKgqAWyLjoA at the 2:58 mark. \$\endgroup\$
    – Jrbdog
    Feb 18, 2019 at 7:46

2 Answers 2

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Based on the video you link, I don't think there is some secret, non-obvious way to open the door that you are missing. Most likely something is wrong with the lock screw or the door is stuck.

Possible solutions to consider:

  • Use a rubber mallet to tap around the door to loosen stuck components so that the door can be opened.

  • Apply moderate dry heat to the area to free components that are stuck because of contraction.

  • Use a rubber jar opener to increase friction when you try to open the compartment door.

  • Disassemble the device to access the battery compartment and determine why the door was stuck.

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This is likely a bayonet lid that will be pushed up, once turned by 90 or so degrees, by the contact spring .... if there is a battery, dead or alive, inside. If there is not, you will need to get a firm grip on it, unless turning it with a screwdriver from below while holding the device scale side up already does the trick. Try a magnet, if it is not magnetic ... attach a stick to it with double sided tape, or even actual glue.

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