MAC 600

The machine can store around 200 ECGs before the memory is full. We recommend deleting previously stored ECGs periodically. To clear the memory on the unit, ensure that you have transferred all ECGs on the machine and follow the instructions below;

1. Ensure you have the SD card inserted into the machine.

2. Power on the machine and then press ‘F4’ for more options.

3. Press ‘F3’ to access File Manager.

4. You will now be able to see a list of all stored ECGs. To select all ECGS press ‘F2’.

5. All ECGs will now be highlighted. Press ‘F4’ for more options.

6. Press ‘F1’ to Delete.

7. You will now be prompted for a system password. Providing this has not be been changed the default is either ‘1111’, or '11112222' if you purchased your system from April 2023.

8. You will now receive a final warming message. Press ‘F2’ to confirm.

The machine will last around 3 to 6 hours on one full charge, dependent on usage. One full charge takes around 4 to 6 hours.

1. Open the paper drawer located on the left of the machine.

2. Place the Z-fold paper pack inside the draw.

3. Lift the first sheet of the pack (should have an arrow printed on it with a black rectangle in the upper left corner) outside of the draw.

4. Close the paper draw.

5. The sheet if aligned correctly should now rest within the drawer’s lid.

In the back of the machine is an SD card where all the ECGs are stored.

The card itself can be locked so that the data on it cannot be changed or deleted.

Occasionally this can be done by accident.

To check if the card is locked, eject the SD card from the back of the machine.

In the top left corner of the card is a tiny switch. If this switch is all the way down or in the middle then the card is locked and write protected.
Gently move the switch all the way back to the top and reinsert the SD card back into the machine.

Yes, you can purchase additional cards, however you need to ensure that the card(s) you buy are no higher than ‘2GB’. This is due to how the machine stores ECGs on the card. SD cards of a higher capacity will not be recognised by the machine.

This usually means that one or two of the limb leads are struggling to gain a connection with your patient. Start by checking the right arm and left leg limb leads. If either of these two leads have a problem the machine will not be able to give you any traces.

If still having problems, it may indicate an issue with the electrode contact to your patient. Usually this means there maybe something on the patient’s skin blocking contact, or the gel in the electrode is dry.

Remove all limb lead electrodes from your patient. Clear the areas of any residual gel from the electrodes using an alcohol wipe and dry with a paper towel. This should also remove anything on the patient’s skin that may have previously been blocking contact with the electrode.

Once done apply a fresh set of electrodes from a brand-new unopened packet.

The quality of an ECG trace depends on a few factors but one of the biggest is patient comfort and relaxation. If the patient is tense, struggling to relax, or is in an uncomfortable position this is reflected by interference on the ECG. This Is known as muscle tremor.
There are a few things you can try to mitigate the problem and reduce the interference.

1. Wherever possible attempt to adjust the bed or patient position to make them as comfortable as possible.

2. If the patient is elderly, very muscular, or struggling to relax their limbs and you are using the wrist and ankle limb lead positions, consider moving those attachments to the hips and clavicle. This focuses on much stiller parts of the body that patients have an easier time relaxing.

3. Avoid advising the patient to remain ‘Still’. Most patients will take this to mean go rigid and at this point tense up. Instead, try advising the patients ‘Go Floppy’. This causes the patient to release any tension.

4. This machine does have an inbuilt muscle filter which will desensitise the machine to this kind of interference. We don’t usually recommend using option, because desensitising the machine can mask some conditions from appearing on the ECG, but you are free to use this as a last resort option. To Access the muscle filter, while viewing the ECG trace press ‘F4’ for more options and then ‘F1’ becomes the filter. Press this button until you see ‘100Hz’.

Evidently if the patient is nervous and struggling to relax while having an ECG taken then you may still get a little interference, you may want to seek clinical guidance if this continues to be an issue.