DESCRIPTION OF CONTROLS, INDICATORS, ALARMS & CONNECTIONS
3-12 SERHT50NA A0808
NOTE: The humidifier is operational only when the HT50 is
powered by external A.C. power.
NOTE: If the humidifier and/or the temperature probe is removed or
malfunctions or if the humidifier bottle is remo
ved prior to turning the
humidifier off, the Humidifier On LED changes from green to blinking
yellow, an audible alarm sounds and the heater shuts down
automatically. To restart the humidifier, correct the alarm condition
and press the Humidifier On button.
V
•
(mandatory flow)
Range: 6 to 100 L/min
V
•
shares a numeric display window with I:E Ratio.
V
•
LED is illuminated green when flow is displayed.
Displays the calculated flow delivered from the ventilator during
volume controlled mandatory breaths. V
•
display is not available
during Pressure Controlled breaths or SPONT mode.
NOTE: Flow can be adjusted indirectly by changing the tidal
v
olume (Volume Control) or t
I
settings.
I:E Ratio
(inspiratory time to expiratory time)
Rang
e: 1:99 to 3:1
I:E Ratio shares a numer
ic display window with V
•
.
I:E LED is illuminated green when I:E Ratio is displayed.
I:E Ratio is determined by the
ƒ and t
I
settings. If expiratory time
is longer than inspiratory time, the display format is 1:X.X. If
expiratory time is shorter than t
I
, the display format is X.X:1. When
the I:E Ratio is inverse, the I:E Ratio indicator illuminates once every
breath. I:E Ratio does not function during SPONT mode.
Internal Battery Test Button and Indicator
When the HT50 is powered by the dual internal battery, the LED
on this button illuminates. A yellow LED indicates the internal
battery system is in use. A blinking yellow LED indicates low
power. When the battery system is completely discharged, the LED
blinks red.
Pressing this button allows the Int. Battery Charge Level to be
read in the lower half of the Paw meter window. The battery
charge level should only be tested when the HT50 is operating on
the dual internal battery. Testing while plugged into any external
power source will give inaccurate readings.
Test the HT50 dual internal battery periodically to verify that the
charge level is in the blue area. The numbers on the Paw meter do
not reflect the percent of charge.
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