YSI 2900 - Pumps

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Touch  at the bottom right of the adjustment window, then touch  to confirm saving the position.
7.2.2 Pumps
From the Service menu, touch the [Pumps] tab.
7.2.2.1 Sipper Pump
Home
Touch the [Home] button to Home the sipper pump plunger. The pump plunger will extend fully, then retract slightly.
Aspirate
Touch the [Aspirate] button. The pump plunger will retract about half way as it does when it aspirates a sample. Note that
the actual distance depends on the sample size setting.
Dispense
Touch the [Dispense] button. The pump plunger will extend about half way as it does when it dispenses a sample into the
sample module.
When you have finished testing the sipper pump, touch the [X] button to return to the main display.
7.2.2.2 Buffer Pumps
Touch the [ON] button under a buffer pump. The selected buffer pump will run. Touch the [OFF] button to stop the pump.
When you have finished testing the buffer pumps, touch the [X] button to return to the main display.
7.2.2.3 Calibrator Pumps
Touch the [ON] button under a Cal Pump. The selected calibrator pump will run. Touch the [OFF] button under the same
pump to stop it.
NOTE: Prime all installed calibrator bottles daily to remove air bubbles from the tubing.
When you have finished testing the fluid pumps, touch the [X] button to return to the Main display.