---
title: Set the period and precision of a Chart’nX dashboard
description: Choose the dates, a shortcut such as Last 30 Days and a precision from 1 minute to 1 month in a Chart’nX dashboard, and understand grayed-out values.
canonical: https://wiki.can-nx.com/en/guides/chart-period/
language: en
product: Chart’nX
audience:
  - utilisateur
  - administrateur
  - installateur
context: "Chart’nX: saved dashboard in view mode, date bar and Precision, computer and mobile"
---

# Set the period and precision of a Chart’nX dashboard

Context: Chart’nX: saved dashboard in view mode, date bar and Precision, computer and mobile

In a saved Chart’nX dashboard, the date bar sets the displayed period and **Precision** the time grouping of the data, from one minute to one month. Users, administrators and installers use them to view history, examine a detail or compare periods.

To open the dashboard, see [From Emergy’nX](https://wiki.can-nx.com/en/guides/chart-open-emergy/) or [From Boss’nX](https://wiki.can-nx.com/en/guides/chart-open-boss/).

## Choose the period

1. Check the project and the dashboard in the header.
2. Click in the period field, between the two chevrons of the top bar. On mobile, tap the calendar icon there.
3. Choose the start and end dates in the calendar, or a predefined period.
4. The selection applies automatically. Review the displayed period before comparing values.
5. The left and right chevrons move to the previous or next period; check the new dates displayed.

The shortcuts have English names, including in the French interface:

| Shortcut | Period covered |
| --- | --- |
| **Today** | Today |
| **Yesterday** | Yesterday |
| **Last 7 Days** | The last 7 days, today included |
| **Last 30 Days** | The last 30 days, today included |
| **This Month** | The current calendar month |
| **Last Month** | The previous calendar month |
| **Last 12 Months** | The last 12 calendar months, up to the start of the current month |
| **Last Year** | The previous calendar year |

## Choose the precision

In **Precision**, choose an available value: **1m** (minute), **15m**, **1h**, **24h** (day) or **1mo** (month). The charts are recalculated for the selected period and precision.

The precision describes the time grouping of the displayed data; it does not set the measurement frequency of the equipment. Some values are grayed out depending on the length of the period:

| Precision | Selectable |
| --- | --- |
| **1m** | Period of 7 days or less |
| **15m** | Period of 90 days or less |
| **24h** | Period of more than one day |
| **1mo** | Period of more than 185 days |

To examine more detail, reduce the range; for a long period, choose a wider step.

Changing the period can also adjust the precision automatically and display a notification such as **Precision set at 24 hours** or **Precision set at 1 hour**. This adjustment does not make any measurement disappear.

## Compare dashboards or periods

Use the same dates, the same precision and the same [time zone](https://wiki.can-nx.com/en/guides/chart-display/).

The viewing calendar is not the one in the [CSV export](https://wiki.can-nx.com/en/guides/chart-export/) window: that window has its own period and time step. The generator’s **Preview** tab uses a predefined verification period, the current local day with a one-hour precision; see [Preview and saving](https://wiki.can-nx.com/en/guides/chart-save/).

## Check the result

After each change of dates, review the displayed period and the **Precision** value. An old or wide range only shows the historical data actually recorded for your installation.

## Troubleshooting

If data is still missing after checking the dashboard and a period in which measurements are expected, contact support@can-nx.com with the dashboard name, the dates, the precision and the symptom. If these attempts have already failed, send these details directly.

French labels: **Précision**, **Précision fixée à 24 heures** and **Précision fixée à 1 heure**. The step abbreviations and the shortcut names stay the same.