Application
Measuring efficiency, no-load and standby consumption, regulation and power factor of adapters, chargers and supplies.
Power supply testing lives at the extremes of the measuring range. Full-load efficiency is measured at the top of the range, while no-load and standby consumption are measured at a fraction of a watt - and both are normally reported in the same test report from the same instrument.
This is why low-end performance dominates the specification. An instrument that is excellent at 20 A but cannot resolve 0.5 mA will not produce a usable standby power figure, while a wide-range design that keeps its resolution across the span handles the entire test sequence without reconfiguring.
| Quantities to measure | Instrument family |
|---|---|
| Wide-range input power with fine low-end resolution | Digital power meters and AC/DC electrical parameter testers |
| Low-power and standby measurement | Low-current power meters with high resolution at the bottom of the range |
| Efficiency calculation and comparison | Power meters with communication output and recording |
| Thermal behaviour under load | Temperature measurement and data logging |
Published products
DMM-600 · Digital Multimeters Reference listing
True RMS benchtop digital multimeter for voltage, current, resistance, capacitance and continuity, with a CAT III safety rating and data logging output.
Frequently asked
Standby consumption can be three orders of magnitude below rated load. The instrument has to resolve that level while still handling full load without a range change, which places the emphasis on low-end resolution rather than on maximum range.
Only if it supports both AC and DC measurement modes. Instruments specified for AC only will not deliver an output-side DC figure, which means efficiency cannot be calculated from a single unit.
Send the measurand, the range and the conditions, and we will confirm the instrument family, the configuration and the lead time.
Request for quotation
Send the technical detail and we will confirm availability, lead time and terms. In-stock items ship within 48 hours; customized specifications typically take 2-10 days. Minimum order quantity is 1 pc.