TSI Incorporated Certifier FA Plus, Operator'S Manual

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26 Certifier
®
FA Plus Test System
2.3.6 Breath Trigger Types
This screen defines how the start of the inspiratory breath cycle and the expiratory
breath cycle are detected. Under most circumstances, it is recommended that the auto-
trigger be used.
Figure 24. Trigger Options Menu
Flow Rate Start and end of the breath is determined by the specified
flow rate. If Auto-Triggering is selected, instrument tries to
determine trigger levels. In some cases you may need to
manually select the flow rates by looking at the flow
waveform on the Graph Screen.
Pressure Start and end of the breath is determined by the specified
pressure levels. Positive slope changed through the first
value is used for the start of inspiratory and a negative
slope through the second value is used for the start of
expiratory.
Note : This trigger type is intended to give
advance users additional setup options for special
circumstances, such as achieving basic breath
measurements from high frequency ventilators or other
setups in which flow rate or auto triggering are non-ideal.
TTL
Start and end of the breath is determined by a TTL voltage
signal given at the connector on the High Flow Module
labeled “Trigger Input”. This is only available for the 4081
High Flow Module. The connector is a 3.5 mm mono audio
jack plug.