Bio-Rad Econo Gradient Pump Kits - Manual (Page 24)

5.3 MANUAL MODE
The Econo Gradient Pump and attached devices can be controlled
using the pump’s front panel membrane keys and LCD display while
in Manual mode. Press the Mode key until the Manual LED is
illuminated. Up to three parameters (depending on how many
optional devices are connected to the Econo Gradient Pump) can be
controlled. Choose a field on the LCD by pressing the corresponding
soft key. The selected parameter can be adjusted using the arrow
keys. Pressing the Up arrow key will raise the value of the parameter,
pressing the Down arrow key will lower the value. Pressing and
holding a soft key acts to accelerate the action of the arrow keys.
5.3.1 Setting Flow Rate or Motor Speed
Either RPM or ml/min will be displayed, depending on the setting in
Setup, screen 1. Flow rate or motor speed is selected by pressing the
left soft key. The speed is adjusted by depressing the arrow keys. If
neither a Gradient Mixer nor an auxiliary valve are connected, the
LCD looks like this:
RPM Selected Flow Rate Selected
RPM ml/m
3.45 6.40
5.3.2 Setting Buffer Gradient
Buffer gradient (%B) is selected by pressing the center soft key. This
option is only available if the Gradient Mixer is connected to the
pump’s Mixer connector. The percent of the gradient is adjusted using
the arrow keys. Pressing and holding a softkey acts to accelerate the
action of the arrow keys.
ml/m %B
3.45 0
System Operation
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