Where repeated and continuous medium supply occurs in the instrument
Distinguish single replenishment, periodic dispensing and continuous supply. Confirm wetted materials, replenishment and connection methods for the composition, temperature, dose and run duration of media, buffers and additives.
Include bottle changes, priming and the first delivery after flow stops in the replenishment program. A short water test does not establish material compatibility or medium-delivery performance over an extended run.
Product responsibilities in this operation
The valveless metering drive delivers liquid under the actual start-stop or continuous program. Nozzle geometry, backpressure and source conditions jointly affect what reaches the destination.
For this cell culture and transfer task, confirm discrete or continuous feeding mode, time profile, medium, load, cumulative volume and permissible interruption.
Organize the sequence by actual architecture
- For suitable repeated or continuous medium supply, define the formulation and temperature of medium, buffer or additives, the delivery profile over time and the target cumulative volume.
- Prime the actual wetted path under the outlet load and measure initial output. Set repeated-dose or continuous-supply programs for the actual operating conditions.
- Record output in each time window, bottle changes and no-flow periods, and verify actual cumulative addition to the culture vessel. For discrete syringe-based replenishment, compare the corresponding syringe-pump application.
- After restart, check the liquid column and initial delivery, then assess supply performance and the corresponding culture requirements separately. Supply records do not replace measurements of cell condition.
Define operating conditions for this task
| To define | Details |
|---|---|
| Actual operating conditions | Discrete or continuous feeding mode, time profile, medium, load, cumulative volume and permissible interruption |
| Acceptance target | Measure pulse doses or flow over defined time windows separately, then reconcile cumulative material, bottle changes and restarts. |
| Fault localization | An empty source, bubbles, refill interruptions or repeated control states may alter actual feed delivery. |
Compare product configurations by the roles on this page
| Product | Configuration option | Conditions to verify |
|---|---|---|
| RPL Valveless Metering Pump | Suitable repeated or continuous metering | Compare displacement, speed, actual backpressure and starts/stops; check two-stream ratios separately |
Validate operation results at the receiver
Measure pulse doses or flow over defined time windows separately, then verify cumulative material, bottle changes and restart behavior.
Compare viability, recovery and cell condition before and after transfer, and validate the required contamination controls.
Locate abnormalities and restore the next operation
An empty source, bubbles, refill interruptions or repeated control states may alter actual feed delivery.
Review actual results of affected steps before resuming the next action.
Low shear and sterility are validation objectives for the complete flow path. Neither a diaphragm pump nor a pinch valve alone establishes them.