regularly refresh Chrome tab I have a Transformer Prime TF201 which I sit next to my main pc to display a webpage that shows stats about the systems I work on.

However this page is a bit rubbish for updating and will time out and log off and generally just not work all that well (its a home made iframe that just shows data from other sites).

On a windows system elsewhere I used a line of VBS to, effectively, hit F5 every 30 seconds and this basically resolved all the issues.

Can anyone think of a way to do this on Android?
Adding extensions will solve this type of requirements.
But Chrome for android does not support any extensions yet.
Look at the Chrome for Android FAQ  

Or else you can use Dolphin Browser to achieve this.   It supports extensions.
If you are willing to use Dolphin Browser instead of Chrome, use this Auto Reload Extension.
You can set time intervals in it.