5. 5. OCSI (
oxygen concentration status
indication module)
function
5.5.1. Operating principle
The oxygen monitor (Item 2 Fig 2.1) is an
electronic module capable of checking the
effective oxygen concentration supplied by
the concentrator.
The oxygen monitor measures the concentra
-
tion and activates an audible and visual alarm
if it falls below the alarm set point percentage.
(Refer to Section 5.4 for information on the
operation of the indicators and alarms for the
OCSI function)
Oxygen Concentration - USP93%
In compliance with the ISO 8359 standard,
the flow supplied is equal to the flow set on
the flowmeter, accurate to within ± 10% or
200 ml/min, whichever is the larger of the
two.
Average oxygen content:
8 l/min: 90%. +5.5% / -3.0%
(Values at 21
o
C and at one atmosphere pressure).
Minimum recommended flow, 2 lpm.
Maximum recommended flow, 8 lpm.
The variation of the maximum recommended
flow does not exceed ± 10 % of the indicated
value when a back pressure of 6.9 kPa (1 psig)
is applied to the output of the device. The
maximum outlet pressure is 117 kPa (17 psig).
5.5.4 Maintenance of the Device Alarms
No special maintenance is required. The alarm
set-point is factory set and the setting cannot be
adjusted. All models are set at 84%.
The equipment supplier verifies that the device
is still operating correctly when the routine
checks are performed.
5.6. Technical characteristics
Dimensions: L x W x H: 394 x 396 x 706 mm
(15.5 x 15.6 x 27.8 in.)
Caster diameter: 50 mm (2.0 in.).
Tilt angle (transport with humidifier fitted): 70
o
.
Weight: 24 kg /54 lbs
Noise level < 53 dBA
Flow values:
Continuously Adjustable Flowmeter: 2 to 8
liters/minute.
(Some models may have other values.)
Noise level conforms to ISO 8359 Standards.
(Fig. 5.1)
Red Indicator Green Indicator
