Xltek® Trex HD Amplifier
User & Service Manual
42
Channel Test Signal Toolbar
9.5.3.
Impedance Check
An impedance check is performed to ensure that the electrode contact with the patient is satisfactory. You
can perform an impedance check at any time during a study.
To Run an Impedance Check from the Software
When an impedance check is initiated, the software scans all channels (in auto scan mode).
To…
Do this…
Start the impedance check
Choose
Controls > Impedance Check
Lock onto a channel
Click
Lock Channel
. Then, make adjustments to the electrode
connection until satisfactory levels are achieved
Proceed to a full impedance check
Click
Release Lock
End the impedance check
Click
End
Save the impedance check as part of
the study
Click
End and Start Recording
An impedance check displays bar graphs that show the impedance of each electrode connection. A
green
bar indicates that the reading is below the set threshold. A
red
bar indicates the reading is above
the threshold. To set the impedance threshold, click one of the
Threshold
buttons in the
Threshold
Group
box on the right side of the
Check Impedance
box.
