EVOLV/.agents/function-anchors/measurement/ANCHOR-measurement.md

Measurement Function Anchor (Preparation Baseline)

0) Connection Map (At a Glance)

• Node type: measurement (nodes/measurement/measurement.js:1, nodes/measurement/measurement.html:14)
• Consumes topics: measurement, simulator, outlierDetection, calibrate (nodes/measurement/src/nodeClass.js:147)
• Publishes periodic outputs:
  • Output 0: process payload (nodes/measurement/src/nodeClass.js:137)
  • Output 1: influx payload (nodes/measurement/src/nodeClass.js:138)
  • Output 2: parent registration (registerChild) (nodes/measurement/src/nodeClass.js:118)
• Cross-node integrations (direct observed):
  • Registers as child to parent with positionVsParent and optional distance (nodes/measurement/src/nodeClass.js:118)
  • Emits measurement updates through MeasurementContainer in specificClass (nodes/measurement/src/specificClass.js:479)
• Admin/UI endpoints:
  • GET /measurement/menu.js (nodes/measurement/measurement.js:23)
  • GET /measurement/configData.js (nodes/measurement/measurement.js:33)
  • POST /measurement/asset-reg (nodes/measurement/measurement.js:43)

1) Unit Table (Initial Baseline)

Signal/Field	Represents	Default Unit	Source of Truth	Produced By	Consumed By	Fallback/Degraded Behavior
inputValue	raw measurement input	asset-dependent	nodes/measurement/src/specificClass.js:30	measurement topic or simulator	scaling/smoothing pipeline	defaults to 0
outputAbs (mAbs)	processed absolute output	config.asset.unit	nodes/measurement/src/specificClass.js:472	updateOutputAbs()	process/influx outputs + event emitter	constrained to configured abs range
outputPercent (mPercent)	normalized percent-like output	% semantic	nodes/measurement/src/specificClass.js:483	updateOutputPercent()	process/influx outputs	interpolated from abs range or observed min/max
storedValues	smoothing window values	same as processed value	nodes/measurement/src/specificClass.js:24	applySmoothing()	smoothing and repeatability checks	capped to smoothWindow length
simulation.enabled	internal simulated signal mode	boolean	nodes/measurement/src/specificClass.js:52	config/topic toggle	tick() behavior	off by default

2) Class Identity

• Runtime registration + endpoints: nodes/measurement/measurement.js
• Node-RED wrapper/routing: nodes/measurement/src/nodeClass.js
• Domain measurement logic: nodes/measurement/src/specificClass.js
• Editor UI/defaults: nodes/measurement/measurement.html

3) Current Gaps To Resolve Before Declaring Anchor Complete

1. Node label precedence can hide fallback text due to expression order:

• return this.positionIcon + " " + this.assetType || "Measurement"; (nodes/measurement/measurement.html:63)

2. success variable is assigned without declaration in editor save path:

• success = window.EVOLV.nodes.measurement.assetMenu.saveEditor(this); (nodes/measurement/measurement.html:131)

3. toggleOutlierDetection() mutates config object to boolean:

• this.config.outlierDetection = !this.config.outlierDetection; (nodes/measurement/src/specificClass.js:503)

4. Input handler ignores numeric strings for measurement topic:

• accepts only typeof msg.payload === 'number' (nodes/measurement/src/nodeClass.js:152)

4) Standardization Plan (Mirror RotatingMachine)

1. Keep this anchor pair (.md + .html) and evidence file maintained with behavior changes.
2. Maintain test layout under nodes/measurement/test/:

• basic/, integration/, edge/, helpers/

3. Maintain examples package under nodes/measurement/examples/:

• README.md, basic.flow.json, integration.flow.json, edge.flow.json

5) Acceptance Criteria For Completion

• Required anchor artifacts exist and map to current behavior.
• Test suite runs with node-level command.
• Example flow files exist and pass flow-structure tests.