About: 1-Wire Power Usage Meter

Model:  Custom Made Power Usage Meter
Purpose: Provides power usage information
Purchased from: Custom Made - 1-Wire Counter from www.hobby-boards.com
Weather-Display now can show your house holds power usage using a 1-Wire counter module and a Smart Power meter. The Smart Power meter needs to have an opto-isolated output. Basically this means that it has extra two terminals that 5 volts can be applied, you will get a pulse output which will vary depending on how much power you are using. I am using a Single phase DEM011 power meter with an 800 pulse per kWh. The meters come in either 3200, 1600 or 800 pulse and single or three phase models.
Showing the 1-Wire Counter Board:
The white cable goes to the Power Meter opto-isolated Terminals.
The Yellow and Grey Cables is the 1-wire Network (Daisy chain).
The flashing LED is connected to show power is connected to the board. (not needed)
Showing the completed 1-Wire counter enclosed in the black box.
The Counter is Daisy Chained off the Barometer, Another 1-Wire Temp Sensor is Daisy Chained off the 1-Wre Counter (grey cable)

Below are some instructions on how to install this meter:

These instructions are for reference purposes only! CompuTecNetworks.com takes no responsibly for how these instructions are used.
Our house has the older type of meter which the Power Company owns with spinning disk and the dials above which is outside the house in the Meter cabinet. It does not have an output of any sort. We are going to install another new meter with opto-isolated pulse output inside the house on the power fuse board. Can I stress out that because this is mucking around with High Voltages you should always have a registered electrician perform all work!
These instructions do not cover how to install the Power Meter into your house holds power system, that’s up to the sparkys. We are only connecting to the opto-isolated terminals which are safe from high voltages.

After the Power Meter has been wired into your home get the sparky to check with a volt meter that here are no voltages on the between the two opto-isolated terminals and to ground.

Parts you need:
1x Installed DEM011 Power meter or equivalent with opto-isolated output. 5v Input
1x 1-Wire Counter from hobby-boards.com (or Lightning Sensor)
2 core cable.

  1. First off if you have the 1-Wire counter you will need to unsolder and remove the battery otherwise the battery will try and power the rest of the network through the 5v 1-Wire bus when the power supply is removed.
  2. Install a small jumper wire between the two inputs A and B on the 1-Wire counter.
  3. Now turn off all power to your home.
  4. Test again using a volt meter that the meter has no voltages on any of the terminals) If 0volts is measured you are good to continue.
  5. Please refer to the documentation that came with the Power Meter for the exact terminals to use. DO THIS BEFORE you connections are made
  6. Using 2 core cable, Connect the +5v terminal on the 1-Wire Counter to the + Collector (Terminal 3 - opto-isolated) on the Power Meter.
  7. Connect the A and B input (with jumper) to the - Emitter (Terminal 2 - opto-isolated) on the Power Meter..
  8. Power off you 1-Wire Network and wire up the 1-Wire counter up to the rest of your 1-wire network. Connect up the DQ, +5v and GND terminals.
  9. Open Weather-Display and go into the 1-Wire Network Control Panel. You will need to find the 1-Wire counter rom ID by doing a Save/Reset. 
  10. Once you find the RomID enter this into the Power Usage configuration. This is found in the 1-Wire Control Panel under Lightning Setup.
  11. Tick "Use for Power Monitoring and plot on the wind direction graph"
  12. Depending on what Meter you have purchased enter in how many times the meter pulses per kwh. (Ratio Calibration Factor)
  13. Select 1 Minute in the "Minutes to Average Reading" 
  14. If all is working well you should see a blue line appear on the Wind Direction Graph displaying your power usage.