Fusion Series User Manual
The rate can be stated with four different units: mL/min, mL/hr, μL/min, and μL/hr. Adjusting the
units will affect the min/max limits for the Rate field. The units for rate can be set in Options
during the multi-step setup.
Caution
Flow rate is often set for the needs of the experiment; however, users should be aware that
setting high flow rates, especially for viscous fluids, may require high linear force beyond the
limits of the pump which may cause the pump to stall out. Additionally, high flow rates can
exert tremendous pressure within a syringe that may cause glass or plastic syringes to burst.
In the case of high-pressure experiments, users should consider using Chemyx Stainless-
Steel Syringes and the high-pressure Chemyx Nexus 6000 pump.
Static Flow Rate
A static flow rate during a step means that the flow rate does not change during the step. Static
flow rates are set simply by editing the Rate 1 field. Any edit of the Rate 1 field will automatically
change Rate 2 to be equivalent. Whenever Rate 1 and Rate 2 are equivalent, the flow rate will
be static.
Variable Flow Rate
A variable flow rate during a step means that the flow rate will change during the step. Variable
flow rates are set simply by editing the Rate 2 field to a value that is different from Rate 1.
During a step, the flow rate will start at Rate 1 and will linearly increase or decrease such that
Rate 2 is reached at the end of the step’s run.
Start-Time Delay
The Delay field represents the amount of time (in minutes and seconds) to delay starting the
pump after the current step begins.
When entering this value with the numeric keypad, the decimal key is used to indicate the
separation between minutes and seconds. The first two values entered will be in minutes unless
a zero is the first value or a decimal is entered, the occurrence of which causes the next values
to be in seconds.
Example
To set a delay of 1 min and 30 seconds, press the “1” key, then the decimal key, and finally
the “3” and “0” keys. To set a delay of 45 seconds, press the decimal key, then the “4” and “5”
keys.
To remove the delay, simply press the clear key (C) or set the time to zero.
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