85
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. These movements are displayed (Table. 4).
1.
When CO
2
gas is remaining in CO
2
gas cylinder A, the unit operates with CO
2
gas supplied from CO
2
gas cylinder A (Situation
1
on table 4).
2.
When CO
2
gas cylinder A is empty, the level of CO
2
density in the unit does not increase because CO
2
gas is not supplied into the unit even though CO
2
gas valve in the unit is open (Situation
2
on table 4).
3.
When the Situation
2
continues for 2 to 3 minutes, CO
2
gas supply line is changed over automatically by
regarding CO
2
gas cylinder as an empty. At this time, CO
2
gas empty alarm is activated, the buzzer sounds,
and CO
2
gas supply indicator A is displayed in reverse video and blinks (Situation
3
on table 4).
4.
CO
2
gas empty alarm is released by pressing Buzzer key. The reverse video is put the light off (Situation
4
on table 4).
5.
Exchange the empty CO
2
gas cylinder A into a new one immediately after the Situation
4
(Situation
5
on
table 4).
6.
When CO
2
gas cylinder B is empty, it changes into CO
2
gas cylinder A.
Table 4
CO
2
gas supply line automatic changeover
(e.g.) When CO
2
gas cylinder A is empty, it changes over CO
2
gas cylinder B.
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
Light on Light off
2
CO
2
density in the
chamber is not
increased even if
CO
2
gas valve opens.
A Empty
Remaining
Light on Light off
3
CO
2
gas supply line
is changed over B
automatically.
B Empty
Remaining
Reverse
video
and blink
Light on
Err01:
CO
2
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 CO
2
gas cylinder B gets empty without the
CO
2
gas cylinder A being replaced in the Situation
5
, the operation of switch between CO
2
gas supply line
A and B will be repeated. In this case, replace the both CO
2
gas cylinders, A and B, and press the Buzzer
key immediately.
·
The changeover of CO
2
gas cylinder is judged by an increase of CO
2
density in the chamber. In case that
the gas tube is clogged, the gas is leaking, the gas pressure is dropped down, or the level of valve open for
CO
2
gas cylinder is not enough, etc, the changeover of CO
2
gas cylinder may be done even though the
CO
2
gas cylinder being used is not empty.
