Compleo Cito 500 BM SAM - Time Measurement of the Charging Service Duration (Stopwatch Function)

16 SAM_EN | 01 2022_05
2.11 Time measurement of the charging service duration (stopwatch function)
The SAM has an internal quartz-controlled real time clock (RTC). This is used for time measurement (for the
charging time or standing time).
The charging service time is the time between the moment the charging equipment detects the connection of a
vehicle and the moment the charging equipment detects the disconnection of the vehicle from the charging
equipment.
The start condition for recording the charging service duration is successful authorisation at the charging station
and the connection to the vehicle (plug inserted on both sides).
The stop condition for recording the charging service duration:
1. For a charging line connected at the charging point of the charging equipment, the disconnection of the
to the charging equipment (the trigger is the disconnection of the control pilot signal of the pilot circuit
according to EN 61851-1).
2. For a socket at the charging point of the charging equipment, the disconnection of the external charging
cable at the charging station.
Internally, the time is measured with a resolution of one millisecond. The time is shown to the second on the
display (for clarity), with the milliseconds truncated. This means that the seconds display does not show rounded
values. The following figure illustrates this.
Figure 7: Measurement period on the display is not rounded.
The options for checking this time measurement are described below.
Checking the time measurement by means of the display
In the display, a start bar accurate to the second is also shown, which begins a 2 second countdown (bar
progresses from left to right) after the charging column is connected to the vehicle. The time starts to be
measured after the countdown. The measurement stops when the vehicle is disconnected from the charging
station.
NOTE
The stopwatch continues to run after charging has stopped.
If the vehicle has its own charging cable, it is not sufficient to simply unplug the vehicle. The time measurement
only stops when the plug is pulled out of the charging station.
To check the stopwatch yourself, the start time can be recognised via the start bar and the accuracy of the
stopwatch function can be checked via a stopwatch. The verification time should be at least 10 minutes in order
to demonstrate sufficient accuracy. According to the standard, a deviation of 1% is permissible.
Start
Stop
Actual time:
Time shown on the
display: