User Manual

X12+_______________________________________________________________________________
2-8
Lead Check
The LEAD CHECK, DISPLAY ECG and CONFIGURE tasks are performed prior to starting a new patient.
LEAD CHECK, DISPLAY ECG and DONE are typically selected prior to each new session.
Checking Impedances
LEAD CHECK is the first option displayed on the LCD screen after patient hook-up and is a valuable tool for
verifying and optimizing signal quality before starting a patient session.
From the Main menu, scroll to LEAD CHECK using the Down or Up key. Press the Enter key to select this
option.
A graph depicting the impedance measured at the Right Arm (RA), Left Arm (LA), Left Leg (LL) and V1 through
V6 electrodes is displayed from left to right in vertical columns on the screen. The higher the bar, the better the
contact is between the skin and the electrode.
A full-bar graph (6 bars) means optimal high quality and good electrode contact. For good quality transmissions,
the bars should be at least 4 bars high. A low-bar graph means poor quality and high electrode impedance. The skin
preparation should be checked for improvement and, if necessary, the electrode(s) should be replaced.
Once acceptable impedance levels are verified, press any of the three keys to return to the Top Level Options Menu.