Reference, letter d. (reverse gas flow procedure) – Precision Medical HeliO2 Blenders User Manual
Page 27
Heliox / Oxygen Blender Service Manual
Page 25
III. INTERNATIONAL LOW / HIGH Flow Operation Verification Procedure
(60 psi / 4.14 bar MODELS)
S E Q #
DIAL
SET
O2%
OXYGEN PRESS
±1.0
HELIOX PRESS
±1.0
FLOWMETER
SET TO
lpm ±0.2
AUXILIARY
BLEED
FUNCTION
TARGET VALUE
ACTUAL
VALUE
psi
bar
psi
bar
Low
Flow
High
Flow
Low
Flow
High
Flow
Low
Flow
High
Flow
1
ANY
60
4.14
60
4.14
closed
closed
leak
<2 psi / 2 MIN
*2
60
75
5.17
0
0
0
closed
back flow
<100 ml/min
*3
60
0
0
75
5.17
0
closed
back flow
<100 ml/min
4
21
60
4.14
60
4.14
3
15
open
closed
end point
(±0.3) Source Value
5
40
60
4.14
60
3.45
3
15
open
closed
set point
37.0%-43.0%
6
60
60
4.14
60
3.45
3
15
open
closed
set point
57.0%-63.0%
7
80
60
4.14
60
3.45
3
15
open
closed
set point
77.0%-83.0%
8
100
60
4.14
60
3.45
3
15
open
closed
end point
(±0.3) Source Value
9
60
60
4.14
60
3.45
1
1.5
open
set point
57.0%-63.0%
10
60
60
4.14
70
4.83
1
1.5
open
set point
57.0%-63.0%
11
60
60
4.14
53
3.65
1
1.5
open
set point
57.0%-63.0%
12
60
60
4.14
Slowly
reduce
to 40
Slowly
reduce to
2.76
3
15
closed
Alarm ON
42.0
±
2.0 psi
31.0
±
6.0 psi
13
60
60
4.14
Slowly
Increase
to 60
Slowly
Increase
to 4.14
3
15
closed
Alarm OFF
45.0 psi MAX
14
60
Slowly
Reduce to
40
Slowly
Reduce to
2.76
60
4.14
3
15
closed
Alarm ON
42.0
±
2.0 psi
31.0
±
6.0 psi
15
60
Slowly
Increase
to 60
Slowly
Increase
to 4.14
60
4.14
3
15
closed
Alarm OFF
55.0 psi MAX
16
60
60
4.14
60
4.14
MAX
closed
flow rate
30.0
lpm
MIN
120.0
lpm
MIN
17
60
60
4.14
0
MAX
closed
flow rate
30.0
lpm
MIN
85.0
lpm
MIN
18
60
0
60
4.14
MAX
closed
flow rate
30.0
lpm
MIN
85.0
lpm
MIN
19
60
60
4.14
60
4.14
MAX
open
flow rate
30.0
lpm
MIN
120.0
lpm
MIN
* Reference, Letter D. (Reverse Gas Flow Procedure)