| 702 / | HD | DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING |
| 1 | DF | MEASUREMENT SYSTEM IN A SPECIFIC ENVIRONMENT {6} |
| 57 | DF | .~ Electrical signal parameter measurement system {6} |
| 60 | ![]() | .~.~ Power parameter {2} |
| 61 | DF | .~.~.~> Power logging (e.g., metering) {1} |
| 63 | DF | .~.~.~> Battery monitoring |