Ramsey Medical petMAP+ II Operator's Manual page 14

4) Adjust the gain, if necessary. If the signal is too low, the ECG signal
may not be detected, if too high the petMAP+II will display a
message to reduce the gain.
5) When monitoring is complete, turn ECG OFF.
A note about HR: The ECG HR is displayed if the detected ECG HR is judged
by the unit to be accurate and within expected limits. Otherwise, the SpO2
HR is displayed and a small 'o' is displayed below the HR label if the ECG is
ON to indicate that the HR displayed is not from the ECG, but is from the
SpO2.
"GAIN" Switch
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