Dip 5 is down and off. This was as per the instructions in the Haynes Manual.

The recommendations were as follows:
1 - Mixed - ON
2 - Exponential - ON
3 - Lithium - ON (recognises 4 cells)
4 - Ramping - OFF
5 - Auto Calibrate - OFF
6 - Timeout - OFF

That's how I set them - but will definitly try your advice