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Step 4Test and Calibrate
Now that the circuit has been built, it's time to test and calibrate it.
1. Power up the ioBridge module and connect the conditioner circuit to it. The conditioner circuit will be powered by the module.
2. Connect the AC Clamp leads to the circuit. Make sure you don't have the clamp on any wires at this point.
3. Set your digital multi-meter for DC voltage and connect to the ground and output pin of the circuit.
4. Adjust the potentiometer until you reach an output voltage of 1.000v.
5. Make a "calibration cord" by splitting the wires of an extension cord. Be careful not to cut or expose the extension cord wire.
5. Put a single wire of the extension cord (not the ground wire) in the clamp and plug in something of which you know the AC current draw (preferably something with a resistive load, like a heater) . Note the reading you get with your circuit compared to the real value. Although this step isn't actually necessary, it's nice to see if you are in the ballpark. To calibrate my setup, I plugged a portable space heater into a Kill-A-Watt to check the real number. It turned out that I was about 7% off and adjusted my calculations accordingly.
1. Power up the ioBridge module and connect the conditioner circuit to it. The conditioner circuit will be powered by the module.
2. Connect the AC Clamp leads to the circuit. Make sure you don't have the clamp on any wires at this point.
3. Set your digital multi-meter for DC voltage and connect to the ground and output pin of the circuit.
4. Adjust the potentiometer until you reach an output voltage of 1.000v.
5. Make a "calibration cord" by splitting the wires of an extension cord. Be careful not to cut or expose the extension cord wire.
5. Put a single wire of the extension cord (not the ground wire) in the clamp and plug in something of which you know the AC current draw (preferably something with a resistive load, like a heater) . Note the reading you get with your circuit compared to the real value. Although this step isn't actually necessary, it's nice to see if you are in the ballpark. To calibrate my setup, I plugged a portable space heater into a Kill-A-Watt to check the real number. It turned out that I was about 7% off and adjusted my calculations accordingly.
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