I think there’s a bit of (understandable) confusion there.
“EmonPi” is a piece of hardware - it’s an aluminium box containing a Raspberry Pi with cut-down emonTx attached, with a small LCD screen.
What I think you mean is emonCMS. That is the software that is downloadable (or you can get if from our shop on an SD card) and runs on a Raspberry Pi, or any Linux machine, or on a Windows machine with a WAMP server installed (Windows-Apache-MySQL-PHP).
If you’ve got emonHub (which I think you’ll have, if you downloaded emonSD-07Nov16.zip), there should be a button to open emonhub.conf in your web browser window. In there, you’ll find a section for your emonTx (check the Node ID - probably 8) and you can edit the number in “scales = …”.
The section of file should look like this:
nodename = emonTx_3
hardware = emonTx_(NodeID_DIP_Switch1:OFF)
names = power1, power2, power3, power4, Vrms, temp1, temp2, temp3, temp4, temp5, temp6, pulse
datacodes = h,h,h,h,h,h,h,h,h,h,h,L
scales = 1,1,1,1,0.01,0.1,0.1, 0.1,0.1,0.1,0.1,1
so the scales line might end up reading something like this (assuming that 0.91 gives you the correct voltage - you might need to tweak the powers further and separately to make those correct too):
scales = 0.91,0.91,0.91,0.91,0.0091,0.1,0.1, 0.1,0.1,0.1,0.1,1