User's Manual

Table Of Contents
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A-5
TELEMETRY TRANSMITTER (96281)
A
PPENDIX A — GUIDANCE AND
M ANUFACTURER S DECLARATION
Notes on ECG Leads
DC means direct current
RA means right arm
RL means right leg
RMS means root mean squared
AC means alternating current
Lead Off Detection Currents Leads off detection uses a DC lead off current of 12 nA for RA
and 27 nA for the all the other electrodes except RL.
Right leg electrode depends on the number of electrodes
connected, but has a DC current of typically 71 nA rising to 83 nA
in the worst case lead configuration.
Active Right Leg Drive Current The AriaTele transmitter has an active right leg circuit. The
maximum right leg drive noise cancellation current is limited
to <4.8 uA RMS AC and <9.5 uA DC, and a maximum voltage of
1.5 V RMS AC.