added pumpingStation config, expanded functionality for difference in measurement container

src/measurements/examples.js

@@ -213,6 +213,10 @@ const pressureDiff = basicContainer
 
 console.log(`Pressure difference: ${pressureDiff.value} ${pressureDiff.unit}\n`);
 
+//reversable difference
+const deltaP = measurements.type("pressure").variant("measured").difference(); // defaults to downstream - upstream
+const netFlow = measurements.type("flow").variant("measured").difference({ from: "upstream", to: "downstream" });
+
 // ====================================
 // ADVANCED STATISTICS & HISTORY
 // ====================================