Valveless-pump titration: when to use bulk addition and when fine metering is needed

01Locate the source, drive and receiving position for this task

Required inputs are expected total consumption, bulk-addition speed, effective increments near the endpoint, residual drips and signal stabilization time. Confirm liquid contact, pressure and destination along each illustrated section before defining drive and connection responsibilities.

02Assess architecture suitability from the required endpoint increment

Define total consumption, bulk-addition rate and allowable increments near the endpoint. If the required effective increment is outside the validated range, compare architectures better suited to fine metering.

03Compare product options against task requirements

The following candidate options match this page's responsibilities. Compare them against the operating conditions described, then check capacity, materials and interfaces on the product pages. Card images show representative configurations; suitability must still be confirmed at actual operating points and by application results.

04Control stopping, residual droplets and mixing delays

Relate addition, mixing waits and detection response. Post-stop drips, tubing elasticity and delivery delay can cause endpoint overshoot. The control program must retain cumulative delivered volume.

Action records should link commands, valve or interface states and actual received results. When raw material, container or sample identity changes, reconfirm shared paths and conditions permitting the next step. Completion of drive movement alone does not replace task acceptance.

05Link actual increments to endpoint validation

Measure actual incremental and cumulative volume, then validate the endpoint against method-specified standards. Diagnose pump output, mixing, response delay and algorithms separately rather than attributing every endpoint fault to insufficient capacity.

Record test medium, configuration, installed path and operating sequence; present routine operating points and boundary results separately. Calculations support design discussions, component documentation checks models, and installed measurements confirm the actual task.

06After an abnormality or maintenance, first identify which segment needs recovery

Retained droplets, oversized increments, insufficient mixing or an unstable signal may cause endpoint overshoot. Check results from the affected step before resuming.

Retain current source, container identity, completed actions, valve or interface state and actual receiving information. Use the table to locate the stage that changed before deciding to retry, continue or restart. After recovery, recheck the relevant operating point before returning an uncertain action to the automatic cycle.

07Continue with tasks on the same branch

References

Related guides

• Piston Pump Titration: Separate Endpoint Increments from Bulk Addition
• Reaction mixing: geometry, speed and reaction uniformity
• Pressure and blockage monitoring: establish action baselines before fault thresholds