WPI NANOLITER2020, Инструкция по эксплуатации

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NANOLITER 2020/200704
World Precision Instruments 15
3. Volume Counter determines how the volume counter is affected when volume is
delivered. Tap the control to toggle between Delivered and Remaining .
• When the Volume Counter slider is set to Delivered , the volume counter
increments when injecting and decrements when withdrawing. The volume count
shown is the amount delivered.
• When Run is pressed the counter resets to zero and increments. When the
slider is set to Remaining , the volume counter decrements when injecting and
increments when withdrawing. When Run is pressed the counter is set to the
volume target and decrements. Negative values signify a withdrawal and positive
indicate an infusion.
4. Tap on a round button to select the desire units. Choose between nL/sec and nL/min
for the delivery rate.
5. Tap on a round button to select your mode. Mode buttons determine the pump
operating mode.
• Disabled –The selected pump is disabled and will not operate. When you return to
the Command screen, DISABLED appears over the selected channel.
• Grouped –You can start and stop all grouped pumps simultaneously. See
“Grouped Operations” on page 32. When Grouped is selected, both pumps (if
present) are set to grouped mode.
• Non-Grouped –Non-grouped pumps operate independently.
Calibrating the MICRO2T System Travel Limits
The MICRO2T monitors the location of the NANOLITER2020 plunger. It is important to
define the limits of travel before you begin using the pump. This keeps the pump from
driving past the mechanical limits of the pump and avoids any jamming issues. When you
install a pump on a new channel, you must set the stop positions so the controller will
properly monitor the pump. Usually this only needs to be done once. But, if the pump is
moved to another channel or the pump, you will need to reset the end stops.
1.
End Stop : The End Stop calibration procedure sets the limit for the maximum
distance that the pump’s plunger carrier can travel in the withdrawn direction. This
setting prevents the motor from forcing the plunger carrier to the mechanical limit
of the drive mechanism for an extended period of time, in the event the pump is left
running unattended. This prevents the possibility of binding the lead screw which can
cause the pump to lock up. The ideal location for the End Stop limit is just a fraction of
a millimeter before the maximum mechanical limit is reached.
The calibration procedure is simple and involves using the controller to manually
position the NANOLITER2020 into the fully withdrawn position by pressing a button.
When the END STOP button is released, the controller automatically performs the
calibration. The calibration should be checked:
• Every time a pump is newly connected to a MICRO2T controller
• Any time a pump is switched to a new channel that was not previously calibrated.
• Any time a pump is stalled due to excessive load or other accidental misuse.