Place the component in the complete analytical fluid path
Normal-cycle baselineSensor at a diagnostic pointFiltered signal and time windowFault classificationStop, retry, purge or service action
Draw the liquid path for prime, normal operation, wash, idle and recovery. Mark which liquid contacts each part and where volume, concentration, pressure or detector response will be accepted.
Select by operating duty rather than a family name
| Configuration | Best starting duty | Boundary to confirm |
|---|---|---|
| ABD bubble detector | Non-contact gas/liquid state on compatible transparent tubing | Tube fit, optical liquid, bubble length and velocity |
| PDM5 pressure sensor | Inline pressure trend | Range, wetted materials, added volume and sample rate |
| Combined monitoring | Differentiate air entry, restriction and valve state | Correlate two signals with commanded motion |
Continue with the application task that matches the liquid movement
Each task guide uses a concrete liquid path, calculation, abnormal-condition table and receiving-position acceptance plan. Choose by what the instrument must accomplish, not by a broad market label.
Provide the inputs that change the configuration
| Input | Provide | Why it changes the design |
|---|---|---|
| Fault definition | Empty source, bubble, blockage, leak, closed valve or filter loading | Determines sensor and location |
| Time behaviour | Shortest fault, speed, sampling and debounce | Determines whether the event is observable |
| Recovery policy | Stop, retry, prime, divert or require service | Turns detection into a controlled instrument response |
FOREACH can use these inputs to match the product configuration, wetted materials, interfaces and control arrangement. The instrument developer remains responsible for method limits, safety logic and qualification of the complete analyzer.
Verify the result after priming, idle time and a realistic fault
- Record the installed configuration and actual liquid, not only the component model.
- Measure steady operation and the first cycle after priming, planned idle and liquid replacement.
- Challenge the relevant abnormal condition: air entry, restriction, low level, blocked outlet or incomplete wash.
- Accept the result at the receiving vessel, detector or cleaned surface; retain the component-level signal for diagnosis.