update

src/specificClass.js

@@ -1,6 +1,11 @@
 const EventEmitter = require('events');
 const {loadCurve,gravity,logger,configUtils,configManager,state, nrmse, MeasurementContainer, predict, interpolation , childRegistrationUtils,coolprop} = require('generalFunctions');
 
+/**
+ * Rotating machine domain model.
+ * Combines machine curves, state transitions and measurement reconciliation
+ * to produce flow/power/efficiency behavior for pumps and similar assets.
+ */
 class Machine {
 
   /*-------------------               Construct and set vars               -------------------*/
@@ -853,12 +858,15 @@ _callMeasurementHandler(measurementType, value, position, context) {
 
   calcEfficiency(power,flow,variant) {
 
-    const pressureDiff = this.measurements.type('pressure').variant('measured').difference('Pa');
+    // Request a pressure differential explicitly in Pascal for hydraulic efficiency.
+    const pressureDiff = this.measurements
+      .type('pressure')
+      .variant('measured')
+      .difference({ unit: 'Pa' });
     const g = gravity.getStandardGravity();
     const temp = this.measurements.type('temperature').variant('measured').position('atEquipment').getCurrentValue('K');
     const atmPressure = this.measurements.type('atmPressure').variant('measured').position('atEquipment').getCurrentValue('Pa');  
     
-    console.log(`--------------------calc efficiency : Pressure diff:${pressureDiff},${temp}, ${g} `);
     let rho = null;
     try {
       rho = coolprop.PropsSI('D', 'T', temp, 'P', atmPressure, 'WasteWater');