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d. Turn off the power switch on the front of the box, attach the cables and the controllers (if
you haven’t already done so), and turn the power on.
e. Apply gas pressure to the inlet of the controllers per the operating pressure listed on the
labels.
f. Box settings: Set/Read to “Set”, Normal/Ratio to “Ratio”, Channel knob to “Channel 1”
(the master channel), and the jumpers (on the back of the box) in the “Manual” position.
g. Dial in the desired flow to control the master controller. The slave(s) will follow at the pre-
set ratio. To see the flows, switch the Set/Read switch to “Read” and monitor channel
one and channel two, confirming that the slave is following the master at the pre-set ratio.