Blinky's Lab
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Geiger Counters

AEGTest Hound-3699 Radon Monitor - Pt.2 The Admin Menu

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AEGTest Hound-3699 Radon Monitor Accessing the 'Admin' menu.

The manual states: Admin: Technician access only (Note: Do Not Click.)

Do not click?
On something I bought? Something I own?

Really?

Give me a big red button that says 'do not press,' and I’m going to press it.
If it’s locked behind a PIN code, I’m going to try and guess it.

And you, AEG Test — you’ve just fuelled me with the absolute determination to click things, crack things, push buttons and tear them to pieces.

That said — I still think this is a decent little unit. So everyone deserves access to the admin menu.

If you follow along, just be warned: there may be dragons

enter image description here From the 'settings' menu select 'Admin'

enter image description here It will ask you for a pin code. I worked it out to 0018. I figured I'd start at 0000 and do 50 numbers each time until I found it. It took 18 goes. 🤣
Punch in 0018 - press OK.

enter image description here Here you have two options, one for resetting it and one for what looks like calibration.

enter image description here The 'admin' reset is a full factory reset and will wipe the PDFs too.

enter image description here The 'slope' menu. It looks like some kind of calibration menu - i suspect here be dragons.

And to AEG Test - If you had let me copy the manual, I may not have been so determined to pull your kit to bits. You might want to think that one out a bit harder next time!

Have at it people, and screw corporate lock-downs on user goods. I really support 'right to repair' and general documentation should be available for all for free. There may be more menus. Maybe at some point I'll try and download the firmware, have a poke about. Have a look for anything hidden, interesting.

All being well and if it works, my next post on this will be a mod to upload the results to your own server and from there you can do with the data what you want.

Archived from radmon.org - originally posted 29/06/2025

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