Micrometer Head Calibration Toolkit (ISO 17025) — Procedure + Uncertainty Budget Excel — CPGL-CAL-012

ISO 17025-Compliant Micrometer Head Calibration Toolkit — Version 2 (GUM-Aligned)

Everything an accreditation-ready calibration laboratory needs to calibrate micrometer heads — one professionally formatted Word procedure plus a fully automated Excel uncertainty budget, both aligned to ISO/IEC 17025:2017 and the ISO GUM (JCGM 100:2008).

What You Get

• Calibration Procedure (Word .docx) — Step-by-step method covering zero-setting verification, anvil face parallelism check, thimble scale graduation, and multi-point measurement comparison against gauge blocks. Includes scope, environmental conditions, reference standard requirements, safety notes, and result interpretation.
• Uncertainty Budget Template (Excel .xlsx) — Pre-built spreadsheet with YES/NO applicability toggles for each uncertainty source, automated Welch-Satterthwaite effective degrees of freedom, Student-t coverage factor lookup (30-entry table), sensitivity coefficients (ci = ∂measurement/∂source), and expanded uncertainty calculation with up to 10 sources per device under test.

Version 2 Highlights

• YES/NO toggle switches — include or exclude each uncertainty source per device; formulas auto-adjust
• Quality checks built in — flags if k < 2, warns on low degrees of freedom, validates input ranges
• Assumptions & Guidelines tab — documents every decision for assessor review
• Sensitivity coefficients — each source carries its ci value for transparent budgets
• Welch-Satterthwaite formula — calculates effective degrees of freedom from mixed Type A/B sources
• Student-t lookup table — 30-entry VLOOKUP from 1 to ∞ degrees of freedom for accurate k values
• Up to 10 uncertainty sources per device — repeatability, resolution, reference standard uncertainty, drift, temperature effects, cosine error, Abbe error, thimble graduation error, anvil parallelism, rounding
• Print-ready A4 format — professional layout for audit binders

Who This Is For

• Calibration laboratories preparing for ISO 17025 accreditation
• Quality managers setting up dimensional calibration capabilities
• Metrology technicians who need a ready-to-use micrometer head calibration workflow
• Consultants helping labs achieve or maintain accreditation

Delivery: Instant digital download — both files ready to use immediately after purchase.