76
GAS AUTO CHANGER (OPTION)
When the CO
2
density level in the chamber remains unchanged even though the CO
2
gas valve in the unit
is open, the unit assumes the currently connected CO
2
gas cylinder to be empty and automatically
switches the CO
2
gas supply line to the other one. The behavior in that case is shown in Table 4.
1.
When there is gas remaining in cylinder A, the unit operates using CO
2
gas supplied from the CO
2
gas
cylinder A (Situation
1
).
2.
When the CO
2
gas 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 to 3 minutes, the gas supply line is automatically switched assuming
the gas cylinder to be empty. At this time, the CO
2
gas empty alarm is activated, the buzzer sounds, and
gas supply indicator A is displayed in reverse video and blinks (Situation
3
).
4.
Press the BUZZER STOP key to stop the CO
2
gas empty alarm. The gas supply indicator A stops
blinking (Situation
4
).
5.
Replace the empty gas cylinder A with a new one immediately after the Situation
4
(Situation
5
).
6.
When the cylinder B becomes empty, the supply line is again switched to the cylinder A.
Table 4. CO
2
gas supply line automatic switching
Situation
CO
2
gas
CO
2
gas supply line indicator
Message
display area
Supply
line
Cylinder
A
Cylinder
B
A B
1
CO
2
gas is being
supplied from cylinder A.
A
Remaining Remaining
Reverse
video and
light on
Light on
-----
2
CO
2
density in the
chamber does not
increase even if CO
2
gas valve is open.
A
Empty Remaining
Reverse
video and
light on
Light on
-----
3
CO
2
gas supply line is
automatically switched
to cylinder B.
B
Empty Remaining
Blink
Reverse
video and
light on
Err01:
CO
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 CO
2
gas cylinder B gets empty
without the CO
2
gas cylinder A being replaced in the Situation
5
, the switch operation between CO
2
gas
supply lines A and B will be repeated. In this case, replace the both CO
2
gas cylinders A and B with new
ones immediately, and press the BUZZER STOP key.
ꞏ
The switching of CO
2
cylinders is determined by an increase of CO
2
density in the chamber. The
switching of CO
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 CO
2
gas cylinder being used is not empty.
Summary of Contents for MCO-50ML
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