Where multiple-source selection fits in the instrument
Calculate shared volume and transit delay when switching samples, standards, blanks and wash liquids. Validate displacement volume, carryover and recovery time for the matrix and analyte rather than selecting by valve port count alone.
Create a port map before switching samples, standards, blanks and wash liquids. Validate blanks and stabilization time with the matrix combinations most difficult to clear, then determine displacement volume.
Product responsibilities in this operation
Valves control the current source or destination; the associated drive performs metering or transfer. Port connections, actual positioning and shared-segment renewal must match the operation.
For this spectroscopy and elemental-analysis task, define all ports, valve states, pressures in each state, shared volume and displacement volume.
Organize the sequence by actual architecture
- Map port connections for samples, standards, blanks and wash liquids. Identify shared tubing, wash destinations and introduction states currently permitted by the instrument.
- Select the current source at pressures permitted by the valve and associated drive. Check ports and actual flow direction to prevent residue from the previous source entering a valid measurement.
- Plan flushing from shared volume and confirm arrival of the new composition at the receiving or introduction interface. Record valve-positioning time separately from completion of liquid renewal.
- Using actual acid/salt matrices and relevant analytes, check blanks, residue and stabilization time after challenging source switches. Release the measurement window only after recovery is confirmed.
Define operating conditions for this task
| To define | Details |
|---|---|
| Actual operating conditions | All ports, valve states, pressures in each state, shared volume and flushing volume |
| Acceptance target | Check unintended connections, leakage, backflow and post-switching residue in each state; measure flushing volume and arrival delay through the complete path |
| Fault localization | Misalignment, shared-segment residue or abnormal switching pressure may affect the next task |
Compare product configurations by the roles on this page
| Product | Configuration option | Conditions to verify |
|---|---|---|
| MRV3 multiport rotary valve | Multiple-source selection | Compare 10-, 16- and 24-port options and port diagrams; verify high-pressure suitability separately |
Validate operation results at the receiver
Check unintended connections, leakage, backflow and post-switching residue in each state; measure flushing volume and arrival delay through the complete path.
Check concentration ratios, mixing, blank recovery and method results. Evaluate preparation and sample supply separately.
Locate abnormalities and restore the next operation
Misalignment, shared-segment residue or abnormal switching pressure may affect the next task.
Stop the pump, check port states and flush again after recovery.
A sample-preparation pump is not automatically suitable for nebulizer supply. Confirm the introduction system for the specific instrument.