2010-8403CE Rev C
8
September 2013
5.4.3 Indicators (continued)
•
The red indicator warns of a process
fault. One event that can cause the red
indicator to be illuminated is low oxy-
gen concentration. The low oxygen con-
centration red indicator will light when
oxygen concentration falls below a pre-
determined set point. Another event that
will cause the red indicator to light is a
blocked cannula. In this case the green
indicator and red indicator will be illumi-
nated simultaneously.
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
Mark 5 Nuvo Lite
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)
In compliance with the ISO 8359 standard.
The fl ow supplied is equal to the selected fl ow,
accurate to within ± 10 % or 200 ml/min,
whichever is the larger.
Oxygen Concentration
• at 2 l/min: >90%.
• at 3 l/min: 90%. (+6.5%/-3%)
(Values at 21
o
C and at one atmosphere pres-
sure).
Maximum fl ow: 3 l/min.
The variation of the maximum fl ow does not
exceed ± 10 % of the indicated value when a
back pressure of 7 kPa (1 psig) is applied to
the output of the device. The maximum outlet
pressure is 50 kPa (7 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 verifi es that the device
is still operating correctly when the routine
checks are performed.
5.6. Technical characteristics
Dimensions: L x W x H: 36x23x58.5 cm (14
x 9 x 23 in.)
Caster diameter: 3.8 cm (1.5 in.).
Tilt angle (transport with humidifi er fi tted)
30
o
.
Weight: 14.5 kg. (32 lbs) varies by model.
Noise level conforms to ISO 8359 Standards.
Flow values
8 position fl ow valve 0.125-3 liters/minute.
(Some models may have other values.)
Accuracy of fl ow supplied
(Fig. 5.1)
Red Indicator
Green Indicator
