Schneider Electric SR2MAN01 user manual Example, Clock Configuration, Steps Description

CHANGE DATE/TIME Menu

Clock Calibration The quartz that controls the real-time clock of the smart relay has a variable monthly drift depending on the environmental conditions of the smart relay.

The maximum value for this drift is approximately one minute per month.

To estimate this drift, proceed by observing the drift on the smart relay clock with respect to a standard reference clock for a few weeks or more.

Example:

If you wish to compensate this drift, you can for example make a -15 second correction per week to compensate for a + 60 second drift per month. This compensation is executed on Sunday at one O'clock in the morning.

Note: This correction serves no purpose if the smart relay is subject to long power interruptions or major variations in temperature.

Clock Configuration

Procedure:

Steps Description

1Select the parameter to modify using the navigation keys and . Result: The selected parameter flashes.

(When you enter this mode, the day value is selected)

2Modify the value of the parameter.

The + and - keys of the contextual menu can be used to change the current value.

3Confirm the changes by pressing the Menu/OK key. Result: The display returns to the MAIN menu.

Note: The smart relay contains a software module that determines the day of the week when the user selects the day of the month in the year.

Note: You are not allowed to modify the hour by a product between 2:00 and 3:00 AM for the days of the change from summer to winter time (at 3:00 it is 2:00)

82 SR2MAN01 11/2007