I'm not sure what Luhr's book shows. I use the Micropule confusing manual to get started.
Hopefully you don't have a bad sensor or panel.
When I recalibrate my Micropulse I make sure my batteries are fully charged then take it off shore power. Tanks are empty.
I disconnect the tanks I don't want to calibrate. My tank sensor lines have come up near the water pump and connect into an RJ11 extender fitting. I disconnect there.
Then I put the Micropulse in calibration mode. Only the one tank I want to calibrate will show green on the panel.
Set the panel to the Empty calibration.
I use a cheapo inline water meter to measure how many gallons to put in for the empty reading. Usually about 4 gallons is good enough.
Set the panel now to Full calibration
Fill the tank to a few of gallons less than the capacity.
Finish the calibration.
Connect the next tank to be calibrated, disconnect the tank you just calibrated then repeat the whole calibration procedure for the 2nd tank.
Same for the 3rd tank.
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
2010 Tundra 5.7L, Double Cab, 2wd, White