6 Monitor Settings
58
User Interface Configuration Implications
QRS Volume
The QRS Volume setting defines the default volume of the QRS Tone. The QRS Tone is derived from
either the
HR from MECG or Pulse from SpO2, depending on which is currently selected as the alarm
source.
QRS Low
The QRS Low setting defines the minimum QRS Tone volume that can be selected by the user while in
Monitoring Mode.
QRS Type
Use the QRS Type setting to configure the type of the QRS sound which can be high pitched (e.g. for
Japan) or low pitched.
The choices are
QRS Tone and QRS Tick.
For both types, the frequency and rhythm information is derived from either the
MECG/DECG or Pulse,
depending on which is currently active.
If the parameter
Tone Modulation is set to Yes (see “Tone Modulation” on page 58), the QRS Type
automatically switches to
QRS Tone.
NOTE
The QRS Type setting is actually a Global Setting.
Prompt Volume
The Prompt Volume setting defines the volume of the tone the monitor emits to draw the user’s
attention to a prompt message shown in the monitor’s prompt/status line.
Tone Modulation
If you set Tone Modulation to Yes, the pitch of the SpO
2
tone will change with the measured signal
strength.
Tone Mod. Type
The Tone Mod. Type setting lets you choose between Standard and Enhanced.
•
Standard is the regular Nellcor behavior. The difference in frequency per % saturation change is
small which might make it difficult to hear smaller changes.
•
Enhanced results in a larger (and therefore more obvious) frequency decrease for each drop in
SpO
2
level. Due to the larger steps, when the saturation drops below 70%, the absolute frequency
may become so low that the perceived volume will be low making it hard to hear a frequency
change per % saturation.
Global Speed
The Global Speed setting defines the speed of all waves on the Screen.
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