SECTION 2
SERHT50NA A0808 2-5
Ext. P
ower / Green LED indicates external power is on and the internal
Charging Int. Battery battery is being charged. Red LED indicates power switchover
to internal battery.
Int. Battery (Push to Test) Yellow LED indicates internal battery is in use. LED blinks
yellow to indicate Battery Low alarm condition or blinks red to
indicate Battery Empty alarm condition.
Humidifier On Green LED indicates humidifier is active. LED blinks yellow to
indicate humidifier alarm condition.
Hardware Requirements
24. Electrical Applied parts type BF
25. External A.C. /D.C. (Battery 100-240 VAC, max. 2 A
Input) 50 / 60 / 400 Hz
12-30 VDC, max. 12 A
26. Dual Internal Battery Primary battery: lead acid, 12 VDC, 5 AH
Secondary back up battery: nickel metal hydride,12 VDC, 2.1 AH
When new and fully charged, the Dual Pac internal battery
supplies power for up to 10 hours of operation at these
settings: A/CMV mode, ƒ=15, Volume Control=500 mL, t
I
=1.0
sec, PEEP=Ø, max. airway pressure 30 cmH
2
O/mbar, Power
Save mode ON.
NOTE: The Dual Pac internal battery charges whenever the
HT50 is connected to an external power source. Battery charge
level is best maintained by keeping the HT50 continuously
connected to external power.
NOTE: The primary internal batter
y capacity diminishes with
age. As the battery ages the Battery Low alarm will occur
sooner. If this begins to infringe on the needed battery time,
prior to scheduled replacement, the primary internal battery
should be replaced.
27. RS-232C Interface /Remote 8 pin SEMCONN connector. Operates at 19,200 baud. Allows
Alarm Output put for interfacing with central alarms systems.
28. Pneumatics Gas delivery system requires no external air compressor.
Miscellaneous Description
29. Operating Temperature –18ºC to 50ºC
NOTE: For proper operation at low range temperatures (-18°C),
the HT50 must be star
ted in a normal room temperature
environment and allowed to run for 30 minutes prior to transfer
to colder environment.
NOTE: At temperatures ove
r 40ºC the charging circuit is
disabled and the internal battery does not charge.
30. Operating Humidity 15 to 95% non-condensing
31. Operating Altitude Sea level to 15,000 ft (0 to 4,572 m)
There is no altitude limitation when HT50 is oper
ated in a
pressurized environment.
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