Every feature, explained.
A complete guide to what MetTutor v2.0 can do — from the AI tutor and MetLibrary to CCT exam preparation, document validators, team management, and everything in between.
AI Metrology Tutor
MetTutor is an AI agent purpose-built for the science of measurement — trained on the MetLibrary knowledge base and designed to answer questions with the depth and precision a calibration professional or metrology student needs.
Expert-level answers grounded in authoritative standards
Every MetTutor response draws from the MetLibrary — a curated collection of 950+ metrology documents. Answers cite their source standard so you always know exactly where the information comes from.
- Unlimited AI messages — no daily or monthly caps
- Citations on every response with document reference
- Step-by-step reasoning for calculations and procedures
- Consistent, standards-aligned answers — not general internet content
- Context-aware across your entire session
MetLibrary
MetLibrary is MetTutor’s dedicated RAG (Retrieval-Augmented Generation) knowledge base — a curated, version-controlled collection of 950+ authoritative metrology documents. It’s the difference between an AI that guesses and one that knows.
950+ documents. One curated knowledge base.
MetLibrary is managed and version-controlled by AI Metrologist to ensure consistent, accurate content aligned with current international standards. When a standard is updated, MetLibrary is updated — eliminating the drift that makes general AI unreliable for professional metrology work.
- 950+ standards, recommended practices, and reference documents
- Semantic retrieval — finds the most relevant content for your exact question
- Every answer includes the source document and clause
- Covers ISO, NIST, NCSLI, A2LA, ILAC, JCGM, ASQ CCT, VIM, and more
- Continuously maintained to reflect current standards revisions
Four Learning Modes
MetTutor organizes every interaction into one of four focused modes — each tuned to produce the kind of answer that’s most useful for your goal at that moment.
Calculators & Standards Guidance
MetTutor provides step-by-step calculation support for the core numerical work of metrology — uncertainty budgets, TUR analysis, GUM evaluations, and unit conversions — grounded in the standards that define these methods.
GUM-compliant uncertainty calculations
MetTutor evaluates each uncertainty component, applies the correct distribution and divisor, calculates combined standard uncertainty, and outputs expanded uncertainty at any coverage factor — with a step-by-step explanation at every stage.
- Type A evaluation (statistical analysis of repeated measurements)
- Type B evaluation (non-statistical, distribution-based)
- Combined standard uncertainty uc
- Welch-Satterthwaite effective degrees of freedom
- Coverage factor k and expanded uncertainty U
- Spreadsheet upload for AI-assisted budget analysis (Metrologist+)
ASQ CCT Exam Preparation
MetTutor provides the most comprehensive ASQ Certified Calibration Technician exam preparation available — from BoK-aligned study through a full 110-question timed mock exam with readiness analytics and SM-2 spaced repetition.
Daily Learning & Quiz
Consistent daily practice is how metrology knowledge actually sticks. MetTutor’s daily quiz, streak tracking, and Concept of the Day are designed to make learning a habit — not a session.
Quiz. Streak. Repeat.
Every MetTutor quiz question is drawn from MetLibrary content — so every question you answer is grounded in the same authoritative sources you’ll encounter on the CCT exam and in professional practice. Each answer includes a source citation.
- Explorer: 3 curated questions per day, free forever
- Student and above: unlimited daily quiz questions
- Streak tracking — consecutive days of quiz activity
- Badges for learning milestones and consistency
- Concept of the Day — a VIM vocabulary term with plain-language explanation daily
Document Intelligence
MetTutor v2.0 introduces an AI skill layer that goes beyond answering questions — it reads your documents and tells you what’s missing, what’s non-compliant, and what needs to change, with citations to the specific clause that applies.
Voice, Export & Accessibility
MetTutor is designed to work the way you do — in the lab, at a desk, or on the move. Voice input, read-aloud, and a complete export suite are included on every plan.
Five export formats. Always included.
Every MetTutor response can be exported in the format that fits your workflow — from a formatted Word document to a raw CSV or TXT. The full export suite is free on Explorer and included on every paid plan.
- Word (.docx) — formatted document with speaker labels and session metadata
- Excel (.xlsx) — structured workbook with role, content, and mode columns
- PDF — printable, archivable, suitable for QMS records
- CSV — structured data for import into other tools
- TXT — plain text for offline reference or sharing
Team Management
Lab Manager and Institution plans include a full team infrastructure — manager dashboard, seat management, email invitations, and usage reporting — so MetTutor scales from one technician to an entire calibration lab or institution.
One account. Your whole team.
Lab Manager includes 15 team seats with Cal Tech-level access per member. The Manager Dashboard gives you a real-time view of team engagement — activity per member, question volume, session counts, and invitation status.
- Invite technicians and staff by email from the Account page
- Existing accounts activate immediately; new users activate on registration
- Remove members at any time to reallocate seats
- Seat expansion packs: +5 ($49/mo), +10 ($89/mo), +25 ($199/mo)
- Institution plan: unlimited seats, no seat management overhead
Standards Library Reference
MetLibrary contains 950+ documents across these core standards families. Availability varies by plan — all plans include MetLibrary citations; advanced standards sets are gated to the appropriate tier.
| Standard / Document | Coverage in MetTutor | Available from |
|---|---|---|
ISO/IEC 17025:2017 General requirements for testing and calibration laboratories |
Clause guidance (§6–§8), traceability §6.6, uncertainty §7.6, reporting §7.8 ISO 17025 Full Checker (10 rules) |
Student+ Checker: Metrologist+ |
JCGM 100:2008 · NIST GUM / TN 1297 Guide to the Expression of Uncertainty in Measurement |
Type A/B evaluation, uc, Welch-Satterthwaite, k, U, spreadsheet upload Full GUM calculationsBudget upload (Metrologist+) |
Student+ |
VIM · JCGM 200:2012 International Vocabulary of Metrology |
500+ metrology definitions — measurand, traceability, calibration, uncertainty and all core terms Concept of the Day |
All plans |
ANSI/NCSL Z540.3 Requirements for the calibration of measuring and test equipment |
TUR calculation, 4:1 rule, risk-based acceptance, false accept/reject probability TUR Calculator |
Student+ |
ILAC P10 / P14 / P15 ILAC policies on measurement uncertainty |
P10 calibration CMC, P14 uncertainty statement, P15 testing uncertainty — accredited lab compliance |
Cal Tech+ Not in Institution |
NCSLI Recommended Practices RP-1–12 National Conference of Standards Laboratories International |
RP-1 measurement assurance, RP-1 cal interval analysis, RP-6 through RP-12 — lab operations guidance |
Metrologist · Lab Mgr |
A2LA R101 · R205 · P102 American Association for Laboratory Accreditation |
R101 general accreditation requirements, R205 calibration laboratory requirements, P102 policy |
Metrologist · Lab Mgr |
AIAG MSA 4th Edition Measurement System Analysis Reference Manual |
Crossed/nested Gage R&R, ANOVA method, %Study Variation, %Contribution, ndc acceptability criteria MSA / GR&R calculations |
Metrologist · Lab Mgr |
JCGM 106 Role of measurement uncertainty in conformity assessment |
Decision rules, guard bands, acceptance intervals, stringent/simple acceptance, false accept risk |
Metrologist · Lab Mgr |
NIST SP 811 · SI Units Guide for the Use of the International System of Units |
SI base and derived units, unit conversion guide, prefixes, dimensional analysis Unit converter · All plans |
All plans |
ASQ CCT Body of Knowledge Certified Calibration Technician exam framework |
7 BoK domains, practice questions, 110Q mock exam, readiness scoring, SM-2 spaced repetition |
Exam Prep: Student+ Mock exam: Cal Tech+ |
Find the plan that fits your work
Explorer is free forever. Paid plans start at $9/month — with 14-day free trials on Cal Tech, Metrologist, and Lab Manager. No credit card required to start.
