So, as far as guidances, no, I’m not aware of a specific requirement to have open/close logs, but as was previously stated, chain of custody and sample integrity are requirements. As such, some access control or documentation would be part of that, but I’m surprised at the details being documented. I believe simply a name and time should be sufficient since the temperature at that time should already be noted, assuming you’re continuously monitoring (a requirement). Also, it seems unnecessary to document the reason for entry since presumably access is limited to qualified personnel and they’re performing routine stability activities. Either way, the reason is immaterial to how the chamber behaves.