How We Test
Principles
Our test work starts with standards and ends with job‑real validation. We anchor lab measurements to traceable references, quantify uncertainty, and then push tools in the conditions where they’ll actually live: dust, glare, vibration, temperature swings, coolant, and gloves.
Rig Design and References
- Traceability: Reference artifacts (gauge blocks, angle standards, voltage/current sources, environmental chambers) are calibrated with traceability to recognized national metrology institutes.
- Controls: Thermal stabilization, probe force control, alignment to avoid Abbe and cosine error, and ESD/vibration isolation where needed.
- Uncertainty: For each test, we create an uncertainty budget (bias, repeatability, resolution, stability, environment) and apply guard bands for pass/fail decisions.
Repeatability, Reproducibility, and Drift
We run MSA/GR&R on critical setups, alternate operators, and re‑run tests after shocks, drops, and thermal cycles to assess stability over time. Where feasible, we age units and re‑verify to map drift.
Field Trials
Lab truth is verified on real tasks:
- Framing/layout: distance and angle under glare, dust, and glove use
- Machining/inspection: calipers/mics, indicators, and angle gauges for Abbe/cosine sensitivities
- Electrical: DMM/clamp performance on harmonics, inrush, ghost voltages, and noisy environments
- HVAC/environmental: airflow, temperature, humidity, and pressure across condensation and vibration
Scoring
- Accuracy Index: Weighted composite of bias, repeatability, resolution vs noise, drift stability, and robustness under adverse conditions.
- Tolerance Finder: Match a tool to your job’s required tolerance, environment, and workflow. We label where a tool fails gracefully and where it should not be used.
Category Protocol Highlights
- Distance/laser: baseline against tape and interferometric references; tests for beam divergence, target reflectivity, and angle‑induced cosine error.
- Calipers/mics: checks across range, jaw alignment, ratchet/force effects, temperature compensation, and IP ratings under coolant.
- Levels/inclinometers: zero stability, cross‑sensitivity, magnetic base effects, and vibration.
- Electrical meters: accuracy vs crest factor and harmonics, input protection, burden voltage, and measurement category claims.
- Environmental sensors: hysteresis, response time, condensation recovery, and long‑term stability.
Selection and Independence
We buy most products at retail. When samples are provided, we disclose it and do not guarantee coverage or favorable outcomes. Vendors cannot preview or edit results.
Data Access and Replication
We publish protocols and representative datasets in articles. On request, we can share additional summaries. Anyone can attempt replication; when you do, tell us what you found—we’ll test it.
Safety and Ethics
Electrical and mechanical tests follow applicable safety practices. No test proceeds if it creates undue risk to people or property.