44
BASIC PARAMETERS
When the O
2
density level remains unchanged even though the N
2
/O
2
gas valve in the unit is opened, the
unit regards the present connecting N
2
gas (O
2
gas) cylinder as an empty. The N
2
/O
2
gas supply line is
changed over automatically. Table. 2 shows the behavior when N
2
gas cylinders A and B are connected.
1.
When N
2
gas is remaining in N
2
gas cylinder A, the unit operates with N
2
gas supplied from N
2
gas
cylinder A (Situation
1
on table 2).
2.
When N
2
gas cylinder A is empty, the level of O
2
density in the unit is on the increase because N
2
gas is
not supplied into the unit even though N
2
/O
2
gas valve in the unit is open (Situation
2
on table 2).
3.
When the Situation
2
continues for 2 to 3 minutes, N
2
/O
2
gas supply line is changed over automatically
by regarding N
2
gas cylinder as an empty. At this time, N
2
/O
2
gas cylinder empty alarm is activated, the
buzzer sounds, and N
2
/O
2
gas supply indicator A is displayed in reverse video and blinks (Situation
3
on
table 2).
4.
N
2
/O
2
gas cylinder empty alarm is released by pressing Buzzer key. The reverse video is put the light off
(Situation
4
on table 2).
5.
Exchange the empty N
2
gas cylinder A into a new one immediately after the Situation
4
(Situation
5
on
table 2).
6.
When N
2
gas cylinder B is empty, it changes into N
2
gas cylinder A.
Table 2
N
2
/O
2
gas supply line automatic changeover
(e.g.) When N
2
gas cylinder A is empty, it changes over N
2
gas cylinder B.
Situation
N
2
gas
N
2
/O
2
gas supply line indicator
Message
display field
Supply line Cylinder A Cylinder B
A B
1
N
2
gas is supplying
from valve A.
A Remaining Remaining
Light on Light off
2
O
2
density in the
chamber is on the
increase even if
N
2
/O
2
gas valve opens.
A Empty
Remaining
Light on Light off
3
N
2
/O
2
gas supply line
is changed over B
automatically.
B Empty
Remaining
Reverse
video
and blink
Light on
Err02:
N2/O2 Gas Empty
(and buzzer)
4
Pressed Buzzer key.
B
Empty
Remaining
Light off Light on
5
Changed empty gas
cylinder A
into a new one.
B Remaining Remaining
Light off Light on
Note:
・
When the Buzzer key is not pressed in the Situation
4
and the N
2
gas cylinder B gets empty without the
N
2
gas cylinder A being replaced in the Situation
5
, the operation of switch between N
2
/O
2
gas supply line A
and B will be repeated. In this case, replace the both N
2
gas cylinders A and B, and press the Buzzer key
immediately.
・
The changeover of N
2
gas (O
2
gas) cylinder is judged by an increaes of O
2
density in the chamber. In
case that the gas tube is clogged, the gas is leaking, the gass pressure is dropped down, or the level of
valve open for N
2
gas (O
2
gas) cylinder is not enough, etc, the changeover of N
2
gas (O
2
gas) cylinder may
be done even though the N
2
gas (O
2
gas) cylinder being used is not empty.
