The MAC600 ECG machine utilises a 2GB SD card which stores up to 200 ECGs at a time. Once you surpass that figure, you will need to manually delete the files off the card using the ECG machine. Please take the following steps:
1. Connect the SD card to the back of the ECG and power it on.
2. Press 'F4' for more and then 'F3' for file manager.
3. Press 'F2' to select all the files and 'F4' for more again.
4. Press 'F1' to delete.
6. At this point it may prompt you for a password. Please enter '1111' for older devices or '11112222' for newer devices then press the circular button in the centre of the arrow pad to confirm.
Once the card has cleared, the device will be ready for use again.