Event Controlled Recording - ECR
Zero dead time Data Acquisition
The ECR mode allows targeted acquisition of cyclic or sporadically arising events. This implies that the registration of measuring data only occurs if certain signal conditions (trigger, time window, repetitions, etc.) are fulfilled. Thus many unwanted and unneeded signal data will not be stored.
Nevertheless, it can be guaranteed that no dead times arise and therefore no events will be lost. This even applies if many channels at maximum sample rate have to be supervised over a long period of time. Since each channel possesses its own signal buffer (up to 128M samples), only the average number of events per second may not exceed a certain value.
The trigger conditions can be individually set for each channel, whereby even more complex signal criteria (e.g. pulse width/height, slew rate, window-IN/OUT) can be defined.
The length and number of events is only limited by the size of the hard disk
ECR Single Channel Mode
The signal data is being registered separately for each channel.
In this mode each selected channel serves as a single trigger source, which marks the area where the signal data is selected from and stored into the file. Only data from the corresponding channel is being registered.
However, it is possible to associate further channels parallel to a single channel. The signals of those associated channels are then stored in the same time frame as the triggering channel.
ECR Multi Channel Mode
The signal data is being registered parallel from all active channels.
The ECR mode runs as follows: The digitalized signal will be stored to the onboard memory which acts as a ring buffer.
As soon as the trigger is released, a block of samples will be read from the ring buffer and will be saved to the hard disk.
If a new trigger event within the actual block occurs, a new overlapping block will be saved.
If the ring buffer is full, the oldest measurement data will be overwritten with new incoming data. Usually, the overwritten data would be transferred to the hard disk before this happens. If too many events occur in a period of time, the ring buffer may overflow. TranAX will display a message according to the status.
After the predefined number of saved blocks is reached, the recording stops.
Dual Mode is an extension for the ECR Mode. It will record usually relatively slow signals of all active channels continuously and parallel to the registration of (fast recorded) ECR trigger events. The slower clock rate of the dual mode can be adjusted by a clock divisor for a slower continuous recording in relation to the faster sampling rate.
From start to stop conditions, the slower recording runs synchronously to the registered ECR events. The slower continuous record always stores the data of all active channels.