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Equipment INS-101
FM sensor_drift_calibration
ISO 14224 mode Sensor drift Sensor drift
Source synthetic + standards-based engineering estimate (ISO 14224 / API / IEC 61511 框架归类)
传感器漂移/校准失效
INS-101 · Instrumentation & Safety Instrumented System (SIS)
Related equipment → INS-101
0.82Source conf.
—Evidence conf.
Sensor driftISO 14224 mode
1Failure Mechanism
Function:测量过程变量
Failure cause:长期漂移未校准
Damage mechanism：传感元件老化/温漂致测量偏差（IEC 61511 传感器要求），可能掩盖真实工况
2Source Basis (where this FM comes from)
synthetic + standards-based engineering estimate (ISO 14224 / API / IEC 61511 框架归类)
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by synthetic + standards-based engineering estimate (ISO 14224 / API / IEC 61511 框架归类).
3Evidence Chain (supporting basis)
This FM has no offline curated evidence text; it is derived from the ontology KB and cross-validated by the listed standard clauses and related accident investigations.
Governing standards (evidence)：std:IEC 61511 — Functional safety—Safety instrumented systems for the process industry sector · 机理级工程估计，非实测；引用 governing standard 作为分类出处std:GB/T 21109 — 过程工业领域安全仪表系统的功能安全 · 机理级工程估计，非实测；引用 governing standard 作为分类出处
4Related Real Accidents (traceable to accident cards)
This FM is recorded in 1 real accident investigation(s); tap the report no. to open the corresponding accident lesson card.
5Applicable Standards & Clauses
IEC 61511GB/T 21109GB/T 20438IEC 61508ISA 84.00.01ISO 14224:2016API 580GB/T 7826-2012SAE JA1011_202411GB/T 27921-2023
No separate clause reference.
6Derived Analysis (seeded from this FM)
6/4/4FMEA Sev/Occ/Det
0.24RBI λ
0.85Monitor pdet
6 月Insp. int.
Current tasks:定期校准 | 趋势比对
RCFA incident:传感器漂移/校准失效：长期漂移未校准，后果类型 Operational/Safety，严重度 6
7RCM Maintenance Decision (strategy landing)
PMScheduled (Proactive) Maintenance
Recommended task标定/零点-跨度校验 + SIL Proof test + 阀门行程试验 + 变更管理
Suggested intervalHigh risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Decision basis机理类别=instrument
Governing standardsGB/T 21109IEC 61511ISA 84
⚠ This decision is engineering-inferred by RCM logic from the damage mechanism / root cause / failure cause — it is not derived from measured site history. Confirm with the equipment owner and process before execution.
⚠ 本卡技术正文（功能 / 致因 / 损伤机理 / RCFA 叙事）保留中文原文——依可信 AI 红线，自由技术文本不自动机翻、不编造英文译文。UI、设备类型、FM 名、ISO 码、标准号均为英文。