Big score for my calcium reactor need help calibrating

[Will Wohlers]

Picked this lovely bunch of equipment up off a very generous eBay seller for $175 shipped! Even threw in an extra head which was unexpected. This was the last piece for my new reactor setup. Never used the digital masterflex though and can't seem to figure out the calibration function. Any tips?
Thanks Will

 

[dadnjesse]

When I bought mine I called Cole Parmer and they emailed me the instruction manual for mine.