gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
140924-1251 EDT
Does anyone in the DTE area have a modren i-phone with the "Insight" application loaded, and also possibly the DTE "Bridge"?
If so are you willing to run some experiments?
DTE makes the claim that you can measure the power consumed by a cord attached load. This would seem to include a low power CFL or LED bulb, a standard incandescent, a refrigerator, a 1500 W heater, etc.
The magnetic field sensor in the i-phone is used to measure the unbalanced magnetic field around the AC power cord to the load device under test. No accuracy is claimed. If the accuracy is not good, my guess is that accuracy is poor, then I would hardly classify the method as a useful power measuring tool. Talking to DTE I could not get a meaningful answer. The person I talked to clearly did not have an electrical background.
A real critical test to run is with a high quality capacitor load. For example 30 ufd polypropylene, about 87 ohms at 60 Hz, and about 1.4 A at 120 V. If the i-phone has no phase information, then it would read about 170 W insread of near zero.
The "Bridge" is a 2.4 GHz ZigBee link between the Smart Meter and your local Ethernet network and in turn to the Internet.
It is claimed the application in combination with the hardware provides real time data. I could not get a valid answer on the response time. The range I have been told is from 3 to 5 seconds by one person, and 120 seconds by another.
Last night we did not have easily available, within the family, the correct or sufficiently new devices to do much tryout of "Insight". Apparently the application does not work on commericial accounts, only residential. Does not measure cord power on an i-pad. Does not measure cord power on an Android phone.
The following site provides some experimental data:
http://electronics.stackexchange.co...he-power-flowing-through-an-ac-appliance-cord
The motor error of 75 vs 56 W (34% high) is not at all a satisfafctory result for a power measurement.
I would like to see more experimental data. Can anyone in the area make measurements?
.
Does anyone in the DTE area have a modren i-phone with the "Insight" application loaded, and also possibly the DTE "Bridge"?
If so are you willing to run some experiments?
DTE makes the claim that you can measure the power consumed by a cord attached load. This would seem to include a low power CFL or LED bulb, a standard incandescent, a refrigerator, a 1500 W heater, etc.
The magnetic field sensor in the i-phone is used to measure the unbalanced magnetic field around the AC power cord to the load device under test. No accuracy is claimed. If the accuracy is not good, my guess is that accuracy is poor, then I would hardly classify the method as a useful power measuring tool. Talking to DTE I could not get a meaningful answer. The person I talked to clearly did not have an electrical background.
A real critical test to run is with a high quality capacitor load. For example 30 ufd polypropylene, about 87 ohms at 60 Hz, and about 1.4 A at 120 V. If the i-phone has no phase information, then it would read about 170 W insread of near zero.
The "Bridge" is a 2.4 GHz ZigBee link between the Smart Meter and your local Ethernet network and in turn to the Internet.
It is claimed the application in combination with the hardware provides real time data. I could not get a valid answer on the response time. The range I have been told is from 3 to 5 seconds by one person, and 120 seconds by another.
Last night we did not have easily available, within the family, the correct or sufficiently new devices to do much tryout of "Insight". Apparently the application does not work on commericial accounts, only residential. Does not measure cord power on an i-pad. Does not measure cord power on an Android phone.
The following site provides some experimental data:
http://electronics.stackexchange.co...he-power-flowing-through-an-ac-appliance-cord
The motor error of 75 vs 56 W (34% high) is not at all a satisfafctory result for a power measurement.
I would like to see more experimental data. Can anyone in the area make measurements?
.
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