Operator's Manual

Chapter 6 Taking medical readings
Tempus Pro User/Operator Manual - 41-2001EN-00 – Page 100
Menu option Menu screen
PI limits (%) – set the upper and lower alarm
limits for Perfusion Index.
PVI limits (%) – set the upper and lower
alarm limits for Pleth Variability Index.
Pulse tones
Pulse tones can be turned on from either the Pulse Oximeter Settings menu or the ECG Settings menu
using the settings:
 HR/PR source = pulse
 HR/PR beat volume = 20% (or above)
When pulse tones are turned on Tempus Pro emits a beep for each pulse beat detected. The beep tone
(frequency) depends on the value of pulse ox saturation (SpO2). Higher SpO2 values mean that each beat
is emitted with a higher tone beep and vice-versa. So the tone drops as SpO2 (%) falls, with the lowest
frequency tone at values of SpO2 = 80% or below.
Note
Alarm tones have priority over pulse tones. When pulse tones are enabled, user interface
touch screen sounds are suppressed.
Note
Pulse tones are automatically enabled if the laryngoscope is used.
Averaging time
The pulse oximeter can be set to average its heart rate reading over different time periods. By default, this
is 8 seconds. This can be adjusted to make the reading more or less responsive. The available settings
are: (2-4 seconds, 4-6 seconds, 8 seconds, 10 seconds, 12 seconds, 14 seconds and 16 seconds).