The blood pressure data from the screen recorders can be read in by the infrared communication port the custo COM IR. The combi-recorder, custo screen 400, also registers ECG for the period the blood pressure of the patient is measured.
The amount of ECG data is enormous, it would take too long to download the ECG over the COM IR port. For that reason custo med has added a SD card in the custo screen 400 recorder, to download the ECG within a minute.
Yes, you need to have the custo screen 300/400 test tool, see in the following LINK
For the most common error codes on the display of the custo screen 300/400 recorders follow this LINK