Why is accurate power consumption measurement important?
Accurate energy consumption measurements are crucial for assessing device performance and ensuring efficient operation. Modern benchtop DC power supplies, such as the Rohde & Schwarz R&S®NGM series, provide advanced functions for power measurements and analyzing power consumption.
How do I know if my power supply is accurate?
Use a precision measurement, low noise power supply No matter how accurate your power supply output is, you cannot guarantee that the programmed voltage is the same as the voltage at the DUT’s terminals. A power supply without sense leads regulates its voltage at its output terminals.
How accurate is a power device measurement?
The larger the measurement error is in device evaluation, the larger the negative impact it has on circuit operating margins and peripheral circuit design. However, test data taken using traditional power device measurement equipment (such as curve tracers) is suspect in terms of measurement accuracy and reliability.
How accurate is a power supply?
As the efficiency goes up to 90 or 95 percent, the error is at around ±1W – a level of accuracy that seems quite acceptable when considering input power. But if you look at the losses in the power supply instead, then the story is rather different.
How can a power supply be used to measure current?
A better way to measure the current is to use a precision-measurement power supply. The current through a device can be measured with the same precision as a high-quality 6½-digit DMM, but it can be done more simply and more accurately as well. Testing is simplified because only a single instrument is required to test the device.
How does a precision-measurement power supply work?
Precision-measurement power supplies are capable of measuring both the current and voltage applied to the device. Current is measured internally, so it places no loading on the test circuit like a series DMM would. This results in the voltage at the device being equal to the programmed voltage.
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In ITI’s view, separating the current and voltage contacts from each other would eliminate any contact resistance or contact impedance from affecting the overall measurement.
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Measuring A Wide Dynamic Range of Current LevelsDetermining Ultra-Low Deep Sleep CurrentMeasuring Transmit and Receive CurrentCapturing Short Transients and Fast TransitionsEnsuring Sufficient Measurement Bandwidth For Your Sample RateTriggering to Isolate Specific EventsRecording Device Operation Over Extended Time IntervalsAnalyzing Power Consumption from Complex WaveformsProviding A Stable Voltage For All Device Operating ConditionsReplicating Battery Output Characteristics AccuratelyTo fully test a portable, low power IoT device, you need a power source that can be controlled. Since a battery cannot be controlled or maintain any specific voltage, a power supply must be used to test the device. However, as the IoT device transitions from sleep mode or standby mode to a transmitting mode, the load current can change from milliamSee more on tek.comtestinglaboratory.org
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In ITI’s view, separating the current and voltage contacts from each other would eliminate any contact resistance or contact impedance from affecting the overall measurement.
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