CONDUCTIVITY_USP
USP <645> Stage 1 conductivity decision against the stepped temperature-dependent limit table.
When to use it
Use CONDUCTIVITY_USP when an on-line conductivity cell with its own temperature element sits on a purified-water or WFI system and the Stage 1 compendial decision has to be made continuously in the controller rather than in the laboratory.
Interface
The published port signature. This is the whole of what the block exposes to your program — the implementation body is not shown here and ships with the download.
Inputs
| Port | Type | Unit |
|---|---|---|
| COND | REAL | uS/cm |
| TEMP | REAL | degC |
| COND_OK | BOOL | — |
| TEMP_OK | BOOL | — |
| NON_COMP | BOOL | — |
| CONFIRM | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| STAGE1_OK | BOOL | — |
| USP_LIM | REAL | uS/cm |
| MARGIN | REAL | uS/cm |
| VALID | BOOL | — |
| STAGE2_REQD | BOOL | — |
| ALM_SENSOR_FAULT | BOOL | — |
| ALM_TEMP_RANGE | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Validation evidence
- Tests
- 8
- Simulated scans
- 53
- Simulator
- v0.1.0
Complete IEC 61131-3 implementation with a published test suite that runs on the vplant simulator. The counts above are that suite, executed on this build.
- Conforms to IEC 61131-3
Download CONDUCTIVITY_USP — free
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