40
BASIC PARAMETERS
Automatic N
2
(O
2
) gas cylinder switching
By using this function, the empty N
2
gas (O
2
gas) cylinder can be automatically switched to the other one,
when the N
2
gas (O
2
gas) cylinder being used becomes empty.
1.
When N
2
/O
2
gas is remaining in N
2
/O
2
gas cylinder A, the unit operates using N
2
/O
2
gas supplied from
N
2
/O
2
gas cylinder A (Situation
1
in table 2).
2.
When N
2
/O
2
gas cylinder A is empty, the level of O
2
density in the unit is on the increase/decrease
because N
2
/O
2
gas is not supplied into the unit even though the N
2
/O
2
gas valve in the unit is open
(Situation
2
in table 2).
3.
When the Situation
2
continues for 2 to 3 minutes, N
2
/O
2
gas supply line is automatically switched
assuming the N
2
/O
2
gas cylinder to be 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
in
table 2).
4.
Press the BUZZER STOP key to stop the N
2
/O
2
gas cylinder empty alarm. The gas supply indicator A
stops blinking (Situation
4
in table 2).
5.
Replace the empty N
2
/O
2
gas cylinder A with a new one immediately after the Situation
4
(Situation
5
in
table 2).
6.
When the N
2
/O
2
gas cylinder B becomes empty, the supply line is again switched to the N
2
/O
2
gas
cylinder A.
Table 2. N
2
/O
2
gas supply line automatic switching
Situation
N
2
/O
2
gas
N
2
/O
2
gas supply line indicator
Message
display area
Supply
line
Cylinder
A
Cylinder
B
A B
1
N
2
/O
2
gas is being supplied
from cylinder A.
A
Remaining Remaining
Reverse
video and
light on
Light on
-----
2
O
2
density in the chamber is
on the increase/decrease
even if the N
2
/O
2
gas valve
is open.
A
Empty Remaining
Reverse
video and
light on
Light on
-----
3
N
2
/O
2
gas supply line is
automatically switched to
cylinder B.
B
Empty Remaining
Blink
Reverse
video and
light on
Err02:
N
2
/O
2
Gas Empty
(and buzzer sound)
4
The BUZZER STOP key is
pressed.
B
Empty Remaining
Light on
Reverse
video and
light on
-----
5
Empty gas cylinder A is
replaced with a new one.
B
Remaining Remaining
Light on
Reverse
video and
light on
-----
Notes:
ꞏ
When the BUZZER STOP key is not pressed in the Situation
4
and the N
2
/O
2
gas cylinder B gets empty without
the N
2
/O
2
gas cylinder A being replaced in the Situation
5
, the switch operation between N
2
/O
2
gas supply lines A
and B will be repeated. In this case, replace the both N
2
/O
2
gas cylinders A and B with new ones immediately,
and press the BUZZER STOP key.
ꞏ
The switching of N
2
gas (O
2
gas) cylinders is determined by an increase (decrease) of O
2
density in the
chamber. The switching of N
2
/O
2
gas cylinders may also occur in the situations where the gas tube is clogged,
the gas is leaking, the gas pressure has dropped down, or the valve on the gas cylinder is insufficiently open etc.,
even though the N
2
/O
2
gas cylinder being used is not empty.
・
Refer to pages 19–20 for how to connect the gas cylinder.
N
2
/
O
2
gas supply line indicator A and B
(N
2
/
O
2
gas supply line which is used now)
<Right side of the display>