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Vacuum adjustment flow board

VacuumAdjustment

VacuumAdjustment

Filling speed adjustment

  1. Check the dilution adjustment is settled around 100% ± 10%
  2. Install the vacuum gauge at the T-junction between flow meter and the black orifice.
  3. Set the vacuum on -130 mBar by adjusting the vacuum regulator.
  4. Check with aspirating ± 10 fresh blood samples the average fill time of the pipettes. The ideal average fill time for a pipette is 2,5-3 seconds measured from entrance into the pipette until the fill-stop sensor.
    Change the filling speed with the vacuum regulator.
    • When the aspiration speed is too slow, apply more vacuum by adjusting the vacuum regulator to a higher vacuum.
    • When the aspiration speed is too fast, apply less vacuum by adjusting the vacuum regulator to a lower vacuum.

See also Block Diagram Vacuum flow regulation

If the average fill speed is 2,5-3 seconds:

  1. Place Kocher plyers to pinch at point A
  2. Check if the flow value= 50 or adjust flow to 50 with the Offset potential meter
  3. Release the pinch valve
  4. Check with Menu options [Flow sensor check] the values for Flow: between 0920-1020
  5. Check if abs is 320. Adjust with the gain potential meter. Depending on local circumstances this value could be adjusted to create an optimal aspiration.
  6. Place plyers again on point A
  7. Check if the flow value = 50, if not adjust flow to 50 with the Offset potential meter
  8. Remove plyers and vacuum gauge

 

VacuumAdjustment

Check the dilution adjustment is settled around 100% ± 10%

Reference list mbar & absolute values

In mbar

100

110

120

130

ABS

0300

0340

0360

0390

See Also

Hardware adjustment (Flow sensor)

Position adjustment

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