Source: https://guthlabs.ai/docs/instruments/titration-curve-plotter/qualification/

instrument qualification / verified-with-binding-errata

# Titration Curve Plotter qualification

Verified with errata that must be applied at binding time.

Status: **VERIFIED_WITH_ERRATA**Lifecycle: **verified-with-binding-errata**

## Ledger verdict

Verified with errata that must be applied at binding time.

**Status**: VERIFIED_WITH_ERRATA

**Tranche**: tranche-6

**Review vectors**: 4

**Ledger rows**: 1

## Applied errata

````
[
  {
    "vector": 2,
    "field": "curve_points pH@0",
    "wrong": 2.872327,
    "correct": 2.875277,
    "cause": "working computes x=0.001332671 correctly, then a WRONG 'Correction' drops Ka^2 under the root, concludes pH=2.875276 anyway — and the field ships 2.872327, matching neither"
  },
  {
    "vector": 4,
    "field": "curve_points pH@10.1",
    "wrong": 10.954243,
    "correct": 10.954677,
    "cause": "micro: [OH-]=1e-5/0.0111 rounded to 9.0e-4 before the log"
  }
]
````

## Adversarial re-test context

The full catalog was re-tested from boundary, convention, and self-check angles in 2,787 requests. Five genuine computational defects were independently verified and corrected. This page reports the current ledger state for this instrument; it does not imply product deployment or interface qualification.

## Release gate

Bind every attached correction, replay the affected vectors, enforce boundary validation, and preserve evidence before describing the executable surface as qualified.

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/titration-curve-plotter/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/titration-curve-plotter/mechanism/>)[03**Implementation**](<https://guthlabs.ai/docs/instruments/titration-curve-plotter/implementation/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `STRESS_TEST_RECEIPT.json`

- `tranche errata record`