41
AUTOMATIC CO
2
CYLINDER CHANGEOVER
A gas auto changer (MCO-21GC) is available as an optional accessory. This system switches the gas
supply line when one of the CO
2
gas cylinders is empty.
Note:
The installation of the MCO-21GC must be performed by qualified service personnel only.
Install the MCO-21GC and then perform the following procedure
1.
Connect 2 gas tubes to connecting ports A and B for CO
2
gas pipes. Connecting ports A and B for CO
2
gas pipes are located on the left back of the incubator. (Refer to page 8).
Note:
Only the port A is available when the MCO-21GC is not installed. Both ports of A and B are
available when the MCO-21GC is installed.
2.
Connect a CO
2
gas cylinder equipped with a gas regulator to each gas tube. Refer to page 14 for
information on connecting the CO
2
gas cylinders. (“Gas cylinder A” is the CO
2
gas cylinder connected to
the connecting port A for CO
2
gas pipe, and “gas cylinder B” is the CO
2
gas cylinder connected to the
connecting port B for CO
2
gas pipe.)
3.
Open the valve of both gas cylinders.
4.
The CO
2
gas supply line indicator of CO
2
gas supply line currently used is ON. (Only when MCO-21GC
is installed.)
CO
2
gas supply line indicator A
CO
2
gas supply line indicator B
Current CO
2
gas supply line is A.
ON
OFF
Current CO
2
gas supply line is B.
OFF
ON
5.
CO
2
gas supply line switches when one gas cylinder is empty.
The notice of change of gas supply line is as follows:
Digital temperature indicator
CO
2
gas supply line indicator
When CO
2
gas supply line
A is switched to B
automatically.
Current chamber temperature
and E01 is displayed alternately.
CO
2
gas supply line indicator A blinks.
CO
2
gas supply line indicator B is ON.
• By pressing the alarm buzzer stop key (BUZZER), the alarm is canceled and the incubator returns to the
normal operation.
6.
When the gas cylinder A is switched to the gas cylinder B, remove the CO
2
gas cylinder A and replace
it with new one.
Note:
Be careful when handling the empty CO
2
gas cylinder. Some gas may still be left in the cylinder.
• When the gas cylinder B becomes empty, the line is switched to the gas cylinder A again.
CO
2
gas supply line indicator B
CO
2
gas supply line indicator A
CO
2
gas supply line switching key
