Questions tagged [power-measurement]
The power-measurement tag has no usage guidance.
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RF jammer module power measurement using a spectrum analyzer
I have an RF jammer module that works at 2390-2510 MHz. The voltage is 24-28 V and it can transmit up to 50 W.
When I use a spectrum analyzer, the value is around -20 dBm. If I'm not mistaken, -20 ...
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Yokogawa WT3000 don't boot
I have a Yokogawa WT3000 Power Analyzer which I was using with no problems and then I turned it off to take a break. An hour later, I tried to turn it on and I notice that it shows nothing on the ...
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What does an accuracy of 0.1% + 20 mV mean in a power analyzer's data sheet?
I need to know the measurement accuracy of Keysight N6705C power analyzer. I came across this document (N6700 Modular Power System Family.pdf) that states the error in terms of a percentage plus a ...
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Best tool for measuring short duration voltage/current?
I'm reusing a watering timer (Melnor 4-port) by removing the circuitry and using only the latching solenoid-driven valves with my own microcontroller. I'd like to determine exactly how much voltage/...
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Watt meter connection in three phase circuit
Does the zero point "where all the voltage coils are linked " in this watt meter connection indicates that the power measured by each one of the watt meter is the phase to neutral or the ...
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Measure transformer real power
I’m new at making transformers myself, and the ones that I designed had the correct output voltage, and when they were connected to batteries (previously rectified), they give me a an approximate of ...
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How to sense a varying current and voltage without affecting the load
I've been asked to build a circuit to switch a constant power (varying current & voltage) supply between two loads, for a research experiment the customer is carrying out. The loads are unknown ...
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Measuring 115 V on microcontroller analog input
I've been tasked with switching a number of 115 VAC, 60 Hz supplies to various pieces of equipment, and monitoring these output supplies on a PIC18. I'm confortable with the PIC and ADC side, but ...
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Why do treadmill amperages fluctuate? [closed]
Multiple sources describe monitoring a treadmill’s current as an indicator of friction. When it increases, it’s time to add silicone oil between the deck and the undersurface of the belt. One good ...
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PAC1921 power monitor issue
I'm trying to measure voltage, current and power by PAC1921 IC.
This is a PAC1921 datasheet:
PAC1921 DataSheet
This is my schematic:
3.3V_Input is input from simple AMS1117 3.3 V regulator and +3.3 V ...
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voltage dividers on inputs to current/power monitor ic
I want to measure the current and voltage of exponential decay pulses delivered to resistive loads. The pulse peak voltages are between 20V and 400V and the time constants are between 1ms and 20ms. I ...
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Measure power & energy usage in tapped line
Here is the schematic of the circuit in question:
The horizontal lines are from the AC mains. Ammeters and wattmeters are connected at any 2 points in the main lines. I am trying to detect if the ...
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Can a single CT Clamp go to 2 energy meters?
I have a Split Core CT CTSA016 - 100A/50mA Yuanxing CT Clamp (Datasheet) around my mains - and it is feeding into my Solar Inverter.
I have just purchased a Shelly EM 2 Channel WiFi energy meter to be ...
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Highly accurate DIY friendly (cheap) power load
To avoid XY question, I start with my motivation and then my question.
I have an Emporia Vue2 (in-panel) power sensor but it is known not to be very accurate. For me there is a discrepancy between the ...
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Power meter integrated in a circuit
I am constructing an electronic circuit that requires a power meter with a voltage signal output that represents the changes in power in a resistive load. It is crucial that the phase of this signal ...
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