This diagram outlines the structured approach to a measurement plan. The diagram is a flow chart. At the top of the chart, there is a single grey box with the word "Meters" inside it. Underneath, there are six grey boxes arranged horizontally. From left to right, the words inside the boxes are: "Electricity," "Natural Gas," "Steam," "Water" and "Condensate," "Compressed Air," and "Data Loggers." All six boxes are connected by lines to the top box. Underneath the six boxes, there are five grey boxes arranged vertically. From the top to the bottom box, the words inside are "Measurement Plan," "Review Existing Site Plans," "Develop a Meter List," "Assign Energy Accountability Centres," and "Decide on Additional Metering or Measurement." The first box in this series, "Measurement Plan," is connected to the six horizontal boxes. Between the five boxes arranged vertically, there are arrows pointing downward.
The diagram depicts a commonly used system that utilizes remote terminal units (RTUs) mounted in the field to monitor energy use in various areas of a plant or facility. "Additional units (as required)" is written at the top left-hand corner of the diagram. Below the wording, there is a vertical line with an arrow pointing up. Pointing left towards the vertical line are two arrows. Beside each arrow there is one illustration representing a computer terminal. RTU is written inside the illustration. "4-20 mA signals (Steam, Air, Natural Gas)" is written on the right-hand side of the top illustration. Below there is a horizontal line connected to an oval on the left-hand side. The oval intersects the vertical line on the left of the RTU illustrations. Written on the right-hand side of the horizontal line is "RS-485 Twisted Pair." There are two horizontal lines pointing left towards the second RTU illustration. "CT inputs" is written on top of the top line. "PT Inputs" is written on top of the second line and there is a voltage transformer symbol located in the middle of the line. There is a vertical line connected to the right-hand side of both horizontal lines. The line has an arrow pointing downwards. At the top, the line turns right. The word power is written at the end of the line. "Additional units (as required)" is written on the top right-hand corner of the diagram. Below the wording, there is a vertical line with an arrow pointing up. Pointing left towards the vertical line are two arrows. One the left-hand side of each arrow there is one RTU illustration. At the botton of the vertical line there is a box a box. "COM.128" is written inside the box. "RS-232 to RS 485 Converter" is written on the right-hand side of the box. Between the COM 128 box and the RTU illustrations there is a telework symbol. There is a second line that connects the COM 128 box to the vertical line on the left-hand side of the diagram. There is a telework symbol in the middle of the line. There is vertical line connected to the bottom of the COM 128 box. This line connects with an illustration of a computer. "EMIS Master Display Station" is written below the computer. The computer is connected on the left-hand side to an illustration of a network server and is connected on the right hands side to an illustration of a local printer.