Sleep and standby power consumption are important indicators for measuring the energy consumption of Petrol Car parts. Many Baic Car parts have cyclic wake-up or interval pulse responses during standby, resulting in large pulse power consumption. Traditional instruments have slow response speed and small range, making it difficult to measure accurately. This article will analyze three difficulties in low-power testing in detail.
Hibernation and standby power consumption are characterized by very low power consumption. Under constant voltage, it is mainly reflected in the case of very small current. Generally speaking, the sleep and standby power consumption of Petrol Car electrical appliances is tens of ma levels. The power consumption of Baic Car parts is generally several ma levels, and can even reach hundreds of ua levels. The level of Petrol Car parts can be as low as na grade, PA level. This requires that the scope of the test equipment can be very small. Zhiyuan Electronics PA310 power meter has a minimum range of 5ma and can measure a current of 50ua as low as possible, covering the lower currents of ordinary household appliances, complete machines and Petrol Car parts.
Although the sleep and standby power consumption current of Baic Car parts is relatively small, there will be a large pulse current every once in a while. For example, for Petrol Car parts, the current in standby is several ma levels. The periodic wake-up current will reach tens of millimeters and hundreds of millimeters. Some special components will have a trigger start mechanism, and the peak current may reach about 10A. The span is very large, and it can test ma-level microcurrent testers, but the larger range basically cannot reach 10A level. If used forcefully, it can easily lead to breakdown of the instrument.
This is just a hardware requirement. To be clear, what we need to test is power consumption, power over time, or current integration. When the ma-level range gear is fixed, when the heartbeat current is large or the peak current impacts, the value will drop to the top because the range is too small, resulting in test errors. When a large number of ranges are used fixedly, the power and current values at full standby cannot be measured because the selected range is too large and the test value is smaller than the limit that can be recognized by the current range.
This requires the instrument to automatically switch ranges during the integration process. The current measurement range of the PA310 power meter is 50ua~20a. It has a wide measurement range, supports automatic range under integration, has a wide dynamic adaptation range, and is suitable for test scenarios with large peak differences.
Another characteristic of the cyclic wake-up current is that it changes quickly, returns to the standby state at the peak of the impact, and has a short duration. This requires the sampling rate and bandwidth of the instrument. Traditional power frequency power meters and low-bandwidth power meters cannot guarantee test accuracy because they can fully capture this process and perform accurate integration operations.
Although the sleep and standby power consumption current of Baic Car parts is relatively small, there will be a large pulse current every once in a while. For example, for Petrol Car parts, the current in standby is several ma levels. The periodic wake-up current will reach tens of millimeters and hundreds of millimeters. Some special components will have a trigger start mechanism, and the peak current may reach about 10A. The span is very large, and it can test ma-level microcurrent testers, but the larger range basically cannot reach 10A level. If used forcefully, it can easily lead to breakdown of the instrument.
This is just a hardware requirement. To be clear, what we need to test is power consumption, power over time, or current integration. When the ma-level range gear is fixed, when the heartbeat current is large or the peak current impacts, the value will drop to the top because the range is too small, resulting in test errors. When a large number of ranges are used fixedly, the power and current values at full standby cannot be measured because the selected range is too large and the test value is smaller than the limit that can be recognized by the current range.
This requires the instrument to automatically switch ranges during the integration process. The current measurement range of the PA310 power meter is 50ua~20a. It has a wide measurement range, supports automatic range under integration, has a wide dynamic adaptation range, and is suitable for test scenarios with large peak differences.
Another characteristic of the cyclic wake-up current is that it changes quickly, returns to the standby state at the peak of the impact, and has a short duration. This requires the sampling rate and bandwidth of the instrument. Traditional power frequency power meters and low-bandwidth power meters cannot guarantee test accuracy because they can fully capture this process and perform accurate integration operations.