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Reference Plate

Who does the work

The desk

Three people. Each one publishes what they are cleared to operate, when they were last checked on it, and what they have no business touching.

Credentials here are a sign-off list rather than a job title: the rigs and instruments a person is cleared to run and calibrate, with the date of their last competency check. It is a more useful thing to know about someone who is telling you a number than where they went to university.

There are no photographs on this site, of anyone. Each analyst has a monogram generated from their id instead.

Measurement lead · on the desk since 2026-02

Teodora Vrabel

Food energy, portioning, the weighed-plate rig

Nine years on the bench of a contract food-analysis lab, running proximate analysis, moisture ovens and bomb calorimetry for private-label manufacturers who needed a number they could defend to a retailer.

Signed off on

  • Analytical balance, 0.01 g — competency check 2026-06-02
  • Bomb calorimeter, operator level 2 — 2025-11-18
  • Weighed-plate rig RP-P1, build and calibration — 2026-05-30

Instrumentation · on the desk since 2026-02

Callum Reith

Reference hardware — sleep, heart rate, step counting

Six years as a biomedical instrumentation technician in a hospital sleep unit, where the job was mostly making sure the reference channel was the thing you could trust when the patient record and the trace disagreed.

Signed off on

  • Polysomnograph, Type II ambulatory — competency check 2026-04-21
  • 3-lead ECG reference harness — 2026-04-21
  • Treadmill step-count rig RP-S2, build and calibration — 2026-06-11

Statistics and uncertainty · on the desk since 2026-03

Nandini Rege

Error budgets, sample design, the corrections log

Metrologist. Wrote uncertainty budgets for an industrial calibration house for seven years, which is a job that consists almost entirely of telling people their number has fewer significant figures than they think.

Signed off on

  • Uncertainty budgets to GUM (JCGM 100:2008)
  • Measurement-system analysis, gauge R&R — 2026-03-09
  • Corrections log — sole editor, no sign-off required from anyone else on the desk

Page last reviewed . Standing pages are re-read whenever a method changes or an entry is added to the corrections log, and the date above moves in the same commit.