8
SPECIFICATIONS
5MD20-0001-01 Rev. 2
Allowable respiration rates:
Adaptive: up to 43 bpm. And down to ~ 5 bpm. (two persons independently)
Apnea time-out envelope:
Adaptive: ~40 sec Pa. 0-12 K ft., ~30 sec. Pa. 13-18 K ft., 20 Sec. at and above Pa. 18 K ft. Apnea
alarm does not respond if in any of the ‘D’ modes and while below that pressure altitude threshold.
Operating inlet pressures:
15 psig. (1 bar) DYNAMIC (flowing) through cannula and 1.5 meters (5 ft.) of 4 mm. inlet tubing.
25 psig. (1.72 bar) .
Operating & storage temperatures, altitudes, vibration @ humidity, (assumes nominal operating voltage):
Temp range @ ~10% RH:
-40° to +60° C. (Storage for complete unit less battery)
Temp range @ ~25% RH:
0° to +60° C. (Operating with std. valve)
Temp range @ ~100% RH NC:
+5° to +60° C. (Operating with std. valve)
Unit is not water-proof, keep it
dry from spray & rain.
Altitudes @ up to ~100% RH:
-100 to +30 K ft. Pressure Altitude range @ +5° to +60° C. (Operating with std. valve)
Vibration:
Random vibration 5 to 500 Hz, (
15 minutes per axis @ 2.5 g. (rms) sin wave)
.
Physical characteristics (EDS-O2D2 unit only):
Width @ widest point: 4.21” (107 mm);
Height, including connectors: 3.73” (94.75 mm.);
Height, enclosure only: 3.18” (80.7 mm); Thickness, front to rear: 1.25” (31.75 mm)
Weight: 11.2 Oz. (0.317 kg.) with batteries
Operating Voltage & Current @ 25° C. @ ~25% RH.
(Measured in the ‘N’ mode setting @ 15 RESP/ typical.)
:
Battery types:
3 ea. Standard 1.5 volt alkaline type ‘AA’ or equivalent. Use only alkalinetype bat-
teries.
Battery Life:
100 to 150 Hrs. @ ~25° C. @ ~25% R.H. Measured from mean, assuming fresh alkaline batteries
operating under normal operating conditions.
Make certain quality alkaline batteries are used. Removed during long-term storage.
External Power:
4.5 VDC external power jack with auto battery disconnect with series diode is provided. No internal
regulation or over voltage protection is provided.
External Audio output:
3.5 mm stereo type jack provides audio output at ~40 mv. RMS into 5K
Ω
L&R independent.
Suitable for most aircraft Integrated Communication Systems (ICS).
Nominal battery voltage:
~4.25 VDC @ 4.30 ma. Idle. 220 ma. Peak (~500 ms. max), 3.25 ma. Average.
Min. start-up voltage:
~2.80 VDC ± 0.1VDC.
Low-battery cut-out:
< 2.5 VDC ± 0.1VDC. (Red light on steady unit in non-responsive state ‘dead’)
Very low battery signal:
~3.0 VDC ± 0.1VDC. (Red light winking 2/sec.) ~5 Hrs. of service left.
Low battery signal:
~3.3 VDC ± 0.1VDC. (Red light winking 1/sec.) ~12 Hrs. of service left.
Notes:
The low battery cut-out feature provides a known state of action if the batteries are depleted to the point
of inadequate power to operate the unit to any of the declared specifications. In addition, this feature
was found to be prudent because, while many of the specifications may stay intact, false triggering of
the valve may confuse the operator of a problem other than low batteries. The minimum ‘start-up’ volt-
age is where the unit will initiate the built-in test and commence operations. However, it should be noted
that, during this operation, if the batteries are then measured to be too low the lock-up feature may then
shortly ensue. This should help the operator in determining if the unit is bad or if the batteries are too
low. A unit that has low batteries that cause ‘lock-up’ will most likely initially start-up if left off for some
time. Alkaline type batteries have so-called self-rejuvenating properties that may cause the user to stall
battery replacement. Obviously, dead batteries will yield no action.
The O2D2 Specifications, performance standards and limits are derived from actual units tested,
characterized or calculated. Specifications are subject to change without notice.
Height
Width
16 mm
Depth
8