Instructions for Operating SPARO's Blank-off Wheel
The blankoff wheel, grid adjuster knob, and two heat switches are all
properly labelled for easy identification.
Read the number on the knob to determine if blank-off wheel is open
The closed position should read 600
on the blankoff wheel knob.
The open position is should read 000 on the knob.
To go from closed to open, turn the knob clockwise, i.e. from 600
decreasing to 000.
To go from open to closed, turn the knob counter-clockwise, i.e. from 000
increasing to 600.
I.e. you never want to go through 800.