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Updated Power monitoring calibration (markdown)

Andre Thomas 2019-02-22 23:57:04 +02:00
parent d2e3c21a98
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Power-monitoring-calibration.md

@ -3,7 +3,7 @@ You might need to calibrate your power monitoring device as correct measurements
## What you need ## What you need
- your power monitoring capable device flashed with Tasmota and configured to a correct module/template that supports power monitoring - your power monitoring capable device flashed with Tasmota and configured to a correct module/template that supports power monitoring
- calibrated multimeter (AC capable) - calibrated multimeter (AC capable)
- incandescent light bulb (we use a 60 W one in the example) - A resistive load device such as an incandescent light bulb (we use a 60 W one in the example) - Other load types are not desired because they do not draw a constant amount of power which will result in incorrect calibration results [e.g. Don't use switch mode driven devices such as LED lamps, computer equipment or inductive/capacitive devices such as motors]
- *(optional)* calibrated power meter (aka Kill A Watt) - *(optional)* calibrated power meter (aka Kill A Watt)
### Step 1 ### Step 1
@ -19,6 +19,8 @@ Verify the **Power** reading in the web UI (optionally with the power meter as w
Verify the **Voltage** reading with the multimeter and if needed change the voltage offset in V with command: <BR>&nbsp;&nbsp;&nbsp;&nbsp;`VoltageSet 235.5`<BR>&nbsp;&nbsp;&nbsp;&nbsp;*(235.5 would be replaced with your measurement which varies depending on the electrical standards and your electrical grid)* Verify the **Voltage** reading with the multimeter and if needed change the voltage offset in V with command: <BR>&nbsp;&nbsp;&nbsp;&nbsp;`VoltageSet 235.5`<BR>&nbsp;&nbsp;&nbsp;&nbsp;*(235.5 would be replaced with your measurement which varies depending on the electrical standards and your electrical grid)*
### Step 5 ### Step 5
Verify the **Current** reading by calculating current value (amperage) using formula **P<sub>(W)</sub>/I<sub>(V)</sub>=I<sub>(A)</sub>** and if needed change the current offset in *mA* (mA=A\*1000) with command:<BR>&nbsp;&nbsp;&nbsp;&nbsp;`CurrentSet 254.777`<BR>&nbsp;&nbsp;&nbsp;&nbsp;*(instead of 254.777 enter your calculation value of ***A multiplied by 1000***)* Verify the **Current** reading by calculating current value (amperage) using formula **P<sub>(W)</sub>/I<sub>(V)</sub>=I<sub>(A)</sub>** and if needed change the current offset in *mA* (mA=A\*1000) with command:<BR>&nbsp;&nbsp;&nbsp;&nbsp;`CurrentSet 254.777`<BR>&nbsp;&nbsp;&nbsp;&nbsp;*(instead of 254.777 enter your calculation value of ***A multiplied by 1000***)*
### Step 6
Confirm the validity of your calibration process your indicated **Power Factor** on the WebUI of the device should be 1.00 or as close as possible to 1.00 - If it is not want to redo the calibration process to make sure everything required was completed correctly. In theory resistive loads will always provide a **Power Factor** of 1.00
Current calculation: Current calculation:
``` ```