61
GAS AUTO CHANGER (OPTION)
When the CO
2
density level remains unchanged, even though the CO
2
gas valve in the unit is opened, the
unit regards the present connecting CO
2
gas cylinder as an empty. The CO
2
gas supply line is changed
over automatically. The behavior in that case is shown in Table. 2.
1.
When there is gas remaining in cylinder A, the unit operates with gas supplied from cylinder A
(Situation
1
).
2.
When cylinder A is empty, the level of CO
2
density in the unit does not increase because gas is not
supplied into the unit even though the gas valve in the unit is open (Situation
2
).
3.
When Situation
2
continues for 2–3 minutes, the gas supply line is changed over automatically. The CO
2
gas empty alarm is activated sounding the buzzer, and gas supply indicator A is displayed in reverse video
and blinks (Situation
3
).
4.
Stop the CO
2
gas empty alarm by pressing BUZZER STOP key. The light on gas supply indicator A is
turned off (Situation
4
).
5.
Exchange the empty gas cylinder A for a new one immediately (Situation
5
).
6.
When cylinder B is empty, the supply reverts to cylinder A.
Table 2
CO
2
gas supply line automatic changeover
Situation
CO
2
gas
CO
2
gas supply line indicator
Message
display field
Supply
line
Cylinder
A
Cylinder
B
A
B
1
CO
2
gas is supplying
from valve A.
A
Remaining Remaining
Reverse
video and
light on
Light on
-----
2
CO
2
density in the
chamber is not
increased even if
CO
2
gas valve opens.
A
Empty
Remaining
Reverse
video and
light on
Light on
-----
3
CO
2
gas supply line
is changed over B
automatically.
B
Empty
Remaining
Blink
Reverse
video and
light on
Err01:
CO
2
Gas Empty
(and buzzer)
4
Pressed
the BUZZER STOP
key.
B
Empty
Remaining
Light on
Reverse
video and
light on
-----
5
Changed empty gas
cylinder A
into a new one.
B
Remaining Remaining
Light on
Reverse
video and
light on
-----
Note:
• When the BUZZER STOP key is not pressed in Situation
4
and cylinder B becomes empty before
cylinder A is replaced, the supply will switch back to cylinder A. In this case, replace both cylinders and
press BUZZER STOP key immediately.
• The automatic changeover of cylinders is linked to the CO
2
density in the chamber. The automatic
changeover of cylinders may also occur in the situations where, e.g. the gas tube gets clogged, gas is
leaking, the gas pressure has dropped, the valve on the gas cylinder is insufficiently open etc, even though
the cylinder being used is not completely empty.
