Xltek® Trex HD Amplifier
User & Service Manual
60
16. Troubleshooting
If you are experiencing problems, try the solutions listed below.
Troubleshooting Checklist
Ask the patient to relax.
Inspect your cables.
Make sure there is a tight connection between the Trex HD and the computer.
Make sure the patient electrodes are connected to the correct channel in the amplifier.
Make sure the patient electrodes fit properly into the amplifier (not loosely).
Make sure there are no apparent breaks in the patient electrode cables.
Are any of the electrodes touching? If so, they are causing a short circuit and will develop an
artifact.
Check the impedance.
Unplug any other devices on the same circuit such as printers, mechanical beds, vacuum
cleaners, or other potential sources of interference.
Install a medical grade ground to make sure that your clinic has a properly grounded
electrical system.
Change the acquisition cable. You should always have a backup acquisition cable.
Check the gain and timebase settings to ensure that they are appropriate for the current
test. You may also want to check the LFF, HFF, and Notch Filter settings. Choose
Edit >
Settings > Montage
. Right-click a cell in the appropriate column and select a value.
Disconnect and reconnect the amplifier. This will reset the amplifier
Shut down for at least 10 seconds. Then set up the test again from the beginning. Shutting
down the computer and starting over also resets the amplifier and sometimes solves the
problem.
Try inserting fresh batteries. If batteries become too low, the Trex HD will not operate.
