Click the Calculation button 
on the left-side menu of the Metering app to open the Calculation page. This page is opened by default, when starting the Metering app.
Content
The page consists of two areas:
- On the left hand side the cost center plan or the project tree appears.
- On the right hand side the calculation chart appears.
Views
This page has two view modes:
- Project tree view
- Cost Center Plan view
Project tree view
This is the default view. The left hand side shows the project tree, including trendings, and an empty calculation chart appears on the right hand side.
Use this view to
- create folders and new calculation charts.
- show previously created calculation charts.
- add trendings to the calculation chart.
Cost Center Plan
The left hand side shows the cost center plan and on the right hand side, again, an empty calculation chart appears.
Use this view to add a meter, a cost center or the whole cost center plan to the calculation chart on the right hand side. To add an element to the calculation chart, select it in the cost center plan and drag it on the calculation chart with the mouse.
Create a new calculation chart
On the Calculation page switch to the Cost Center Plan view.
Drag e.g. a cost center from the cost center plan on the left hand side to the calculation chart on the right hand side - repeat this step for additional cost centers.
A dialog asks to select the resource and how to add the series to the calculation chart.
Select the option Show itemized values to display each meter of the selected resource.
This means if a cost center has 2 meters assigned for electricity - select Show itemized values to see both meters and the sum of them in the chart (3 bars shown in the chart), otherwise the chart will only show the sum of the meters (1 bar in the chart).
Take care of the following difference!
Adding a cost center with its meter to the calculation chart: the bar in the chart shows the consumption of the cost center.
Adding the meter of a cost center to the calculation chart: the bar in the chart shows the total consumption of the meter.
Edit an existing calculation chart
Open the Calculation page, select the calculation chart to edit and click the Configuration button 
in the header section.
The following image shows the configuration of a calculation chart:
Content
The page consists of four areas:
- Name area
- Meter point list area
- Trending list area
- Y axis list area
Name area
| Field | Description |
|---|---|
| Name | Name of the calculation chart. |
| Description | Description |
| Chart type | Normal (default): shows the values of trendings and meter points. Period comparsion: compare the data of a period to data of another period defined by an offset. |
Meter point list area
| Column | Description |
|---|---|
| Meter point | Name of the meter point, including path and resource information. |
| Calculation type | Consumption: The values represent the consumption of a meter point. Its calculation is based on the Meter Reading data. Meter reading: The values represent the reading of the meter point. |
| Show itemized values | Enabled: Show the consumption of each meter point of a certain resource type. Disabled: Show the consumption of all meter points of a certain resource type. |
| Resource | Resource type of the meter point. |
| Trendline | Additionally, according to the meter point data, a Trendline is shown. |
| Type | Line (default): The values are shown as a line. Bar: The values are shown as a bar. |
| Color | Color of line or bar representation. |
| Decimals | Defines the precision of values (meter point and trendline) shown in table view or chart view. Select the number of decimals to show: |
| Offset | This column appears when the Chart type is set to Period comparsion. Define e.g. "-1" to compare in day view to the day before, in week view to the week before and so on. |
Trending list area
| Column | Description |
|---|---|
| Trending | Name of the trending. |
| Y axis | Name of the Y axis which will appear in chart view. |
| Aggregation | Select the aggretagion type: Average, Min, Max |
| Trendline | Additionally, according to the trending data, a Trendline is shown. |
| Type | Line (default): The values are shown as a line. Bar: The values are shown as a bar. |
| Color | Color of line or bar representation. |
| Decimals | Defines the precision of values (trending and trendline) shown in table view or chart view. Select the number of decimals to show: |
| Offset | The column appears when the Chart type is set to Period comparsion. Define e.g. "-1" to compare in day view to the day before, in week view to the week before and so on. |
Y axis list area
| Column | Description |
|---|---|
| Y axis name | Name of the Y axis. |
| Label | Label appearing next to the Y Axis in chart view. |
| Scaling | 0-based: All values appear absolute, based on zero value. Dynamic (default): Based on the values to show, the system decides the range of the Y axis dynamically. |
Click the Add button to add a new Y axis to the list.