Where supply modes fit in the instrument
Define flow, cumulative volume and allowable no-flow time before comparing finite-stroke metering, alternating supply and suitable valveless metering. Include actual media, backpressure, refilling and restart in extended-run evaluation.
Measure cycle output and pauses under actual load. Correct cumulative volume does not ensure that every interval meets its flow requirement; define acceptance criteria separately.
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 continuous feeding, define actual flow, cumulative volume, allowable interruptions, backpressure, refills and operating duration.
Organize the sequence by actual architecture
- For the suitable valveless metering configurations covered here, define target flow over time, operating period, cumulative volume and allowable interruptions. Compare other supply architectures in their product guides.
- Prime under actual formulation, temperature and backpressure. Measure initial, steady-state and post-stop output to establish what actually arrives at the culture interface.
- Include bottle changes, load changes and restarts. Record flow within each time window, output variation and cumulative delivery separately.
- After an interruption, preserve delivered-volume and abnormal-time records. The process program determines compensation and recovery rate; cumulative shortfall alone is insufficient.
Define operating conditions for this task
| To define | Details |
|---|---|
| Actual operating conditions | Actual flow, cumulative volume, allowable interruptions, backpressure, refills and operating duration |
| Acceptance target | Measure operating-flow trends and cumulative volume, including refill interruptions. Evaluate proportioning, process or analytical results according to the task. |
| Fault localization | An empty source, bubbles, slip, pressure changes or resetting can disturb continuous output. |
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 working-flow trends and cumulative volume, including replenishment interruptions. Evaluate ratio, process or detection results according to the intended use.
Record output across the run, replenishment interruptions, first flow after bottle changes and reactor volume balance.
Locate abnormalities and restore the next operation
An empty source, bubbles, slip, pressure changes or resets can disturb sustained output.
Reconcile undelivered volume and process state before restarting to avoid duplicate additions.
Refilling or resetting a single syringe can interrupt supply. Continuous-operation capability and aseptic isolation both require system validation.